diff --git a/.dockerignore b/.dockerignore new file mode 100644 index 0000000..a072a1b --- /dev/null +++ b/.dockerignore @@ -0,0 +1,9 @@ +# More info: https://docs.docker.com/engine/reference/builder/#dockerignore-file +# Ignore build and test binaries. +.git/ +bin/ +charts/ +config/ +docs/ +e2e/ +testbin/ diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..a16d339 --- /dev/null +++ b/.gitignore @@ -0,0 +1,31 @@ + +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib +bin +testbin/* + +# Test binary, build with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Kubernetes Generated files - skip generated files, except for vendored files + +!vendor/**/zz_generated.* + +# editor and IDE paraphernalia +.idea +*.swp +*.swo +*~ + +# built binary +csi-driver-availability-monitor +!csi-driver-availability-monitor/ + +e2e/.kubeconfig diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..0ed4db4 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,21 @@ +FROM quay.io/cybozu/golang:1.18-focal as builder + +WORKDIR /work + +COPY . . + +RUN go build -o csi-driver-availability-monitor + +FROM ubuntu:20.04 + +RUN apt-get update \ + && apt-get install -y --no-install-recommends fio jq \ + && rm -rf /var/lib/apt/lists/* + +COPY --from=builder /work/csi-driver-availability-monitor / + +EXPOSE 8080/tcp +EXPOSE 8081/tcp +EXPOSE 8082/tcp + +ENTRYPOINT [ "/csi-driver-availability-monitor" ] diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f064f60 --- /dev/null +++ b/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright 2022 The csi-driver-availability-monitor Authors. All rights reserved. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..4a6f94a --- /dev/null +++ b/Makefile @@ -0,0 +1,132 @@ + +# Image URL to use all building/pushing image targets +IMG ?= quay.io/topolvm/csi-driver-availability-monitor:latest +# ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary. +ENVTEST_K8S_VERSION = 1.24.2 + +# Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set) +ifeq (,$(shell go env GOBIN)) +GOBIN=$(shell go env GOPATH)/bin +else +GOBIN=$(shell go env GOBIN) +endif + +# Setting SHELL to bash allows bash commands to be executed by recipes. +# Options are set to exit when a recipe line exits non-zero or a piped command fails. +SHELL = /usr/bin/env bash -o pipefail +.SHELLFLAGS = -ec + +.PHONY: all +all: build + +##@ General + +# The help target prints out all targets with their descriptions organized +# beneath their categories. The categories are represented by '##@' and the +# target descriptions by '##'. The awk commands is responsible for reading the +# entire set of makefiles included in this invocation, looking for lines of the +# file as xyz: ## something, and then pretty-format the target and help. Then, +# if there's a line with ##@ something, that gets pretty-printed as a category. +# More info on the usage of ANSI control characters for terminal formatting: +# https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_parameters +# More info on the awk command: +# http://linuxcommand.org/lc3_adv_awk.php + +.PHONY: help +help: ## Display this help. + @awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n make \033[36m\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf " \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST) + +##@ Development + +.PHONY: manifests +manifests: controller-gen ## Generate WebhookConfiguration, ClusterRole and CustomResourceDefinition objects. + $(CONTROLLER_GEN) rbac:roleName=manager-role crd webhook paths="./..." output:crd:artifacts:config=config/crd/bases + +.PHONY: generate +generate: controller-gen ## Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations. + $(CONTROLLER_GEN) object:headerFile="hack/boilerplate.go.txt" paths="./..." + +.PHONY: fmt +fmt: ## Run go fmt against code. + go fmt ./... + +.PHONY: vet +vet: ## Run go vet against code. + go vet ./... + +.PHONY: test +test: manifests generate fmt vet envtest ## Run tests. + KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) -p path)" go test ./... -race -coverprofile cover.out + +##@ Build + +.PHONY: build +build: generate fmt vet ## Build manager binary. + go build -o bin/manager main.go + +.PHONY: run +run: manifests generate fmt vet ## Run a controller from your host. + go run ./main.go + +.PHONY: docker-build +docker-build: ## Build docker image with the manager. + docker build -t ${IMG} . + +.PHONY: docker-push +docker-push: ## Push docker image with the manager. + docker push ${IMG} + +##@ Deployment + +ifndef ignore-not-found + ignore-not-found = false +endif + +.PHONY: install +install: manifests kustomize ## Install CRDs into the K8s cluster specified in ~/.kube/config. + $(KUSTOMIZE) build config/crd | kubectl apply -f - + +.PHONY: uninstall +uninstall: manifests kustomize ## Uninstall CRDs from the K8s cluster specified in ~/.kube/config. Call with ignore-not-found=true to ignore resource not found errors during deletion. + $(KUSTOMIZE) build config/crd | kubectl delete --ignore-not-found=$(ignore-not-found) -f - + +.PHONY: deploy +deploy: manifests kustomize ## Deploy controller to the K8s cluster specified in ~/.kube/config. + cd config/manager && $(KUSTOMIZE) edit set image controller=${IMG} + $(KUSTOMIZE) build config/default | kubectl apply -f - + +.PHONY: undeploy +undeploy: ## Undeploy controller from the K8s cluster specified in ~/.kube/config. Call with ignore-not-found=true to ignore resource not found errors during deletion. + $(KUSTOMIZE) build config/default | kubectl delete --ignore-not-found=$(ignore-not-found) -f - + +##@ Build Dependencies + +## Location to install dependencies to +LOCALBIN ?= $(shell pwd)/bin +$(LOCALBIN): + mkdir -p $(LOCALBIN) + +## Tool Binaries +KUSTOMIZE ?= $(LOCALBIN)/kustomize +CONTROLLER_GEN ?= $(LOCALBIN)/controller-gen +ENVTEST ?= $(LOCALBIN)/setup-envtest + +## Tool Versions +KUSTOMIZE_VERSION ?= v3.8.7 +CONTROLLER_TOOLS_VERSION ?= v0.9.2 + +KUSTOMIZE_INSTALL_SCRIPT ?= "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" +.PHONY: kustomize +kustomize: $(KUSTOMIZE) ## Download kustomize locally if necessary. +$(KUSTOMIZE): $(LOCALBIN) + test -s $(LOCALBIN)/kustomize || { curl -s $(KUSTOMIZE_INSTALL_SCRIPT) | bash -s -- $(subst v,,$(KUSTOMIZE_VERSION)) $(LOCALBIN); } + +.PHONY: controller-gen +controller-gen: $(CONTROLLER_GEN) ## Download controller-gen locally if necessary. +$(CONTROLLER_GEN): $(LOCALBIN) + test -s $(LOCALBIN)/controller-gen || GOBIN=$(LOCALBIN) go install sigs.k8s.io/controller-tools/cmd/controller-gen@$(CONTROLLER_TOOLS_VERSION) + +.PHONY: envtest +envtest: $(ENVTEST) ## Download envtest-setup locally if necessary. +$(ENVTEST): $(LOCALBIN) + test -s $(LOCALBIN)/setup-envtest || GOBIN=$(LOCALBIN) go install sigs.k8s.io/controller-runtime/tools/setup-envtest@latest diff --git a/PROJECT b/PROJECT new file mode 100644 index 0000000..22d1de0 --- /dev/null +++ b/PROJECT @@ -0,0 +1,23 @@ +domain: topolvm.io +layout: +- go.kubebuilder.io/v3 +projectName: csi-driver-availability-monitor +repo: github.com/topolvm/csi-driver-availability-monitor +resources: +- controller: true + group: core + kind: Event + path: k8s.io/api/core/v1 + version: v1 +- controller: true + group: core + kind: Node + path: k8s.io/api/core/v1 + version: v1 +- controller: true + domain: k8s.io + group: storage + kind: StorageClass + path: k8s.io/api/storage/v1 + version: v1 +version: "3" diff --git a/README.md b/README.md new file mode 100644 index 0000000..fde6edd --- /dev/null +++ b/README.md @@ -0,0 +1,62 @@ +TODO: add badges + +# csi-driver-availability-monitor +An application that monitors the availability of Kubernetes storage in end-to-end manner. + +## Description +TODO: decide the name XXX + +XXX verifies that PVs are successfully provisioned on the specified nodes for the specified storage classes and that the PVs can be successfully accessed. It outputs the results as metrics. + +## Getting Started +### Running on the cluster + +1. Create values.yaml. At least the following setting is mandatory. + + ```yaml + controller: + monitoringStorageClasses: [] + ``` + +2. Then you can install it using Helm. + + TODO: decide name XXX + ```sh + helm repo add XXX + helm install XXX --values values.yaml + ``` + +## Prometheus metrics +### `io_write_latency_seconds` +IO latency of write. + +TYPE: gauge + +### `io_read_latency_seconds` +IO latency of read. + +TYPE: gauge + +### `create_probe_fast_total` +The number of attempts that take less time between the creation of the Pod object and the creation of the container than the threshold. + +TYPE: counter + +### `create_probe_slow_total` +The number of attempts that take more time between the creation of the Pod object and the creation of the container than the threshold. + +TYPE: counter + +## Contributing + +### Test It Out +1. Run unit tests. + ```sh + make test + ``` + +2. Run e2e test on the local cluster. + ```sh + make -C e2e create-cluster + make -C e2e test + ``` diff --git a/cmd/controller.go b/cmd/controller.go new file mode 100644 index 0000000..79d4d68 --- /dev/null +++ b/cmd/controller.go @@ -0,0 +1,191 @@ +package cmd + +import ( + "errors" + "flag" + "strings" + "time" + + utilruntime "k8s.io/apimachinery/pkg/util/runtime" + clientgoscheme "k8s.io/client-go/kubernetes/scheme" + ctrl "sigs.k8s.io/controller-runtime" + + "github.com/spf13/cobra" + "github.com/topolvm/csi-driver-availability-monitor/controller" + "github.com/topolvm/csi-driver-availability-monitor/controllers" + "github.com/topolvm/csi-driver-availability-monitor/runners" + "k8s.io/apimachinery/pkg/runtime" + "k8s.io/klog/v2" + "sigs.k8s.io/controller-runtime/pkg/healthz" + "sigs.k8s.io/controller-runtime/pkg/log/zap" +) + +var controllerCmd = &cobra.Command{ + Use: "controller", + RunE: func(cmd *cobra.Command, args []string) error { + return subMain() + }, +} + +var ( + scheme = runtime.NewScheme() + setupLog = ctrl.Log.WithName("setup") + + metricsAddr string + enableLeaderElection bool + healthProbeAddr string + containerImage string + monitoringStorageClasses []string + nodeSelectorLabelString string + namespace string + controllerURL string + probePeriod int + createProbeThreshold time.Duration + eventTTL time.Duration + + opts zap.Options +) + +func init() { + flags := controllerCmd.Flags() + flags.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.") + flags.StringVar(&healthProbeAddr, "health-probe-bind-address", ":8081", "The address the health probe endpoint binds to.") + flags.BoolVar(&enableLeaderElection, "leader-elect", true, + "Enable leader election for controller manager. "+ + "Enabling this will ensure there is only one active controller manager.") + flags.StringVar(&containerImage, "container-image", "", "The container image for csi-driver-availability-monitor.") + flags.StringArrayVar(&monitoringStorageClasses, "monitoring-storage-class", nil, "Monitoring target StorageClasses.") + flags.StringVar(&nodeSelectorLabelString, "node-selector-label", "", "The node selector label to monitor nodes.") + flags.StringVar(&namespace, "namespace", "", "The namespace which the controller uses.") + flags.StringVar(&controllerURL, "controller-url", "", "The controller URL which probe pods access") + flags.IntVar(&probePeriod, "probe-period", 1, "The period[minute] for CronJob to create a probe pod.") + flags.DurationVar(&createProbeThreshold, "create-probe-threshold", time.Minute, "The threshold of probe creation.") + flags.DurationVar(&eventTTL, "event-ttl", 24*time.Hour, "TTL to delete event timestamp") + opts.Development = true + + goflags := flag.NewFlagSet("klog", flag.ExitOnError) + klog.InitFlags(goflags) + opts.BindFlags(goflags) + flags.AddGoFlagSet(goflags) + + rootCmd.AddCommand(controllerCmd) + utilruntime.Must(clientgoscheme.AddToScheme(scheme)) + + //+kubebuilder:scaffold:scheme +} + +func subMain() error { + ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts))) + + mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{ + Scheme: scheme, + MetricsBindAddress: metricsAddr, + Port: 9443, + HealthProbeBindAddress: healthProbeAddr, + LeaderElection: enableLeaderElection, + LeaderElectionID: "650e0359.topolvm.io", // This is just a unique string. The value itself has no meaning. + Namespace: namespace, + }) + if err != nil { + setupLog.Error(err, "unable to start manager") + return err + } + + exporter := controller.NewMetrics() + receiverRunner := runners.NewReceiverRunner(exporter) + err = mgr.Add(receiverRunner) + if err != nil { + setupLog.Error(err, "unable to start receiverRunner") + return err + } + + if containerImage == "" { + err = errors.New("container image empty") + setupLog.Error(err, "the container image should be specified") + return err + } + nodeSelectorLabel := make(map[string]string) + if nodeSelectorLabelString != "" { + if strings.Count(nodeSelectorLabelString, "=") != 1 { + err = errors.New("invalid node selector label") + setupLog.Error(err, "specify a label like key=value.") + return err + } + kv := strings.Split(nodeSelectorLabelString, "=") + nodeSelectorLabel[kv[0]] = kv[1] + } + if probePeriod < 1 || probePeriod > 59 { + err = errors.New("invalid probe period") + setupLog.Error(err, "the probe period should be between 1 and 59", "probe period", probePeriod) + return err + } + if time.Duration(probePeriod)*time.Minute < createProbeThreshold { + err = errors.New("invalid large/small relation") + setupLog.Error(err, "probe period should be larger than create probe threshold", + "probe period", probePeriod, "create probe threshold", createProbeThreshold) + return err + } + eventReconciler := controllers.NewEventReconciler( + mgr.GetClient(), + createProbeThreshold, + exporter, + monitoringStorageClasses, + namespace, + eventTTL, + ) + err = eventReconciler.SetupWithManager(mgr) + if err != nil { + setupLog.Error(err, "unable to start eventReconciler") + return err + } + + if controllerURL == "" { + err = errors.New("empty controllerURL") + setupLog.Error(err, "the controllerURL should be specified") + return err + } + nodeReconciler := controllers.NewNodeReconciler( + mgr.GetClient(), + containerImage, + namespace, + controllerURL, + monitoringStorageClasses, + nodeSelectorLabel, + probePeriod, + ) + err = nodeReconciler.SetupWithManager(mgr) + if err != nil { + setupLog.Error(err, "unable to start nodeReconciler") + return err + } + + storageClassReconciler := controllers.NewStorageClassReconciler( + mgr.GetClient(), + namespace, + monitoringStorageClasses, + ) + err = storageClassReconciler.SetupWithManager(mgr) + if err != nil { + setupLog.Error(err, "unable to start storageClassReconciler") + return err + } + + //+kubebuilder:scaffold:builder + + if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil { + setupLog.Error(err, "unable to set up health check") + return err + } + if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil { + setupLog.Error(err, "unable to set up ready check") + return err + } + + setupLog.Info("starting manager") + if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil { + setupLog.Error(err, "problem running manager") + return err + } + + return nil +} diff --git a/cmd/probe.go b/cmd/probe.go new file mode 100644 index 0000000..2c3dfad --- /dev/null +++ b/cmd/probe.go @@ -0,0 +1,43 @@ +package cmd + +import ( + "errors" + + "github.com/spf13/cobra" + "github.com/topolvm/csi-driver-availability-monitor/probe" +) + +var probeCmd = &cobra.Command{ + Use: "probe", + RunE: func(cmd *cobra.Command, args []string) error { + if probeConfig.nodeName == "" { + return errors.New("no node name specified") + } + if probeConfig.storageClass == "" { + return errors.New("no Storage Class specified") + } + + return probe.SubMain( + probeConfig.nodeName, + probeConfig.fioFilename, + probeConfig.storageClass, + probeConfig.controllerAddr) + }, +} + +var probeConfig struct { + controllerAddr string + storageClass string + fioFilename string + nodeName string +} + +func init() { + fs := probeCmd.Flags() + fs.StringVar(&probeConfig.controllerAddr, "destination-address", "http://localhost:8080", "metrics aggregator's address") + fs.StringVar(&probeConfig.storageClass, "storage-class", "", "target StorageClass name") + fs.StringVar(&probeConfig.fioFilename, "path", "/test", "target I/O test directory path") + fs.StringVar(&probeConfig.nodeName, "node-name", "", "node name") + + rootCmd.AddCommand(probeCmd) +} diff --git a/cmd/root.go b/cmd/root.go new file mode 100644 index 0000000..94b92d8 --- /dev/null +++ b/cmd/root.go @@ -0,0 +1,22 @@ +package cmd + +import ( + "fmt" + "os" + + "github.com/spf13/cobra" +) + +var rootCmd = &cobra.Command{ + Use: "csi-driver-availability-monitor", + Run: func(cmd *cobra.Command, args []string) { + // Do Stuff Here + }, +} + +func Execute() { + if err := rootCmd.Execute(); err != nil { + fmt.Println(err) + os.Exit(1) + } +} diff --git a/config/default/kustomization.yaml b/config/default/kustomization.yaml new file mode 100644 index 0000000..6f268b7 --- /dev/null +++ b/config/default/kustomization.yaml @@ -0,0 +1,74 @@ +# Adds namespace to all resources. +namespace: csi-driver-availability-monitor-system + +# Value of this field is prepended to the +# names of all resources, e.g. a deployment named +# "wordpress" becomes "alices-wordpress". +# Note that it should also match with the prefix (text before '-') of the namespace +# field above. +namePrefix: csi-driver-availability-monitor- + +# Labels to add to all resources and selectors. +#commonLabels: +# someName: someValue + +bases: +- ../crd +- ../rbac +- ../manager +# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in +# crd/kustomization.yaml +#- ../webhook +# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'. 'WEBHOOK' components are required. +#- ../certmanager +# [PROMETHEUS] To enable prometheus monitor, uncomment all sections with 'PROMETHEUS'. +#- ../prometheus + +patchesStrategicMerge: +# Protect the /metrics endpoint by putting it behind auth. +# If you want your controller-manager to expose the /metrics +# endpoint w/o any authn/z, please comment the following line. +- manager_auth_proxy_patch.yaml + +# Mount the controller config file for loading manager configurations +# through a ComponentConfig type +#- manager_config_patch.yaml + +# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in +# crd/kustomization.yaml +#- manager_webhook_patch.yaml + +# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'. +# Uncomment 'CERTMANAGER' sections in crd/kustomization.yaml to enable the CA injection in the admission webhooks. +# 'CERTMANAGER' needs to be enabled to use ca injection +#- webhookcainjection_patch.yaml + +# the following config is for teaching kustomize how to do var substitution +vars: +# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER' prefix. +#- name: CERTIFICATE_NAMESPACE # namespace of the certificate CR +# objref: +# kind: Certificate +# group: cert-manager.io +# version: v1 +# name: serving-cert # this name should match the one in certificate.yaml +# fieldref: +# fieldpath: metadata.namespace +#- name: CERTIFICATE_NAME +# objref: +# kind: Certificate +# group: cert-manager.io +# version: v1 +# name: serving-cert # this name should match the one in certificate.yaml +#- name: SERVICE_NAMESPACE # namespace of the service +# objref: +# kind: Service +# version: v1 +# name: webhook-service +# fieldref: +# fieldpath: metadata.namespace +#- name: SERVICE_NAME +# objref: +# kind: Service +# version: v1 +# name: webhook-service diff --git a/config/default/manager_auth_proxy_patch.yaml b/config/default/manager_auth_proxy_patch.yaml new file mode 100644 index 0000000..cec149a --- /dev/null +++ b/config/default/manager_auth_proxy_patch.yaml @@ -0,0 +1,39 @@ +# This patch inject a sidecar container which is a HTTP proxy for the +# controller manager, it performs RBAC authorization against the Kubernetes API using SubjectAccessReviews. +apiVersion: apps/v1 +kind: Deployment +metadata: + name: controller-manager + namespace: system +spec: + template: + spec: + containers: + - name: kube-rbac-proxy + securityContext: + allowPrivilegeEscalation: false + capabilities: + drop: + - "ALL" + image: gcr.io/kubebuilder/kube-rbac-proxy:v0.13.0 + args: + - "--secure-listen-address=0.0.0.0:8443" + - "--upstream=http://127.0.0.1:8080/" + - "--logtostderr=true" + - "--v=0" + ports: + - containerPort: 8443 + protocol: TCP + name: https + resources: + limits: + cpu: 500m + memory: 128Mi + requests: + cpu: 5m + memory: 64Mi + - name: manager + args: + - "--health-probe-bind-address=:8081" + - "--metrics-bind-address=127.0.0.1:8080" + - "--leader-elect" diff --git a/config/default/manager_config_patch.yaml b/config/default/manager_config_patch.yaml new file mode 100644 index 0000000..6c40015 --- /dev/null +++ b/config/default/manager_config_patch.yaml @@ -0,0 +1,20 @@ +apiVersion: apps/v1 +kind: Deployment +metadata: + name: controller-manager + namespace: system +spec: + template: + spec: + containers: + - name: manager + args: + - "--config=controller_manager_config.yaml" + volumeMounts: + - name: manager-config + mountPath: /controller_manager_config.yaml + subPath: controller_manager_config.yaml + volumes: + - name: manager-config + configMap: + name: manager-config diff --git a/config/manager/controller_manager_config.yaml b/config/manager/controller_manager_config.yaml new file mode 100644 index 0000000..b826c02 --- /dev/null +++ b/config/manager/controller_manager_config.yaml @@ -0,0 +1,21 @@ +apiVersion: controller-runtime.sigs.k8s.io/v1alpha1 +kind: ControllerManagerConfig +health: + healthProbeBindAddress: :8081 +metrics: + bindAddress: 127.0.0.1:8080 +webhook: + port: 9443 +leaderElection: + leaderElect: true + resourceName: 650e0359.topolvm.io +# leaderElectionReleaseOnCancel defines if the leader should step down volume +# when the Manager ends. This requires the binary to immediately end when the +# Manager is stopped, otherwise, this setting is unsafe. Setting this significantly +# speeds up voluntary leader transitions as the new leader don't have to wait +# LeaseDuration time first. +# In the default scaffold provided, the program ends immediately after +# the manager stops, so would be fine to enable this option. However, +# if you are doing or is intended to do any operation such as perform cleanups +# after the manager stops then its usage might be unsafe. +# leaderElectionReleaseOnCancel: true diff --git a/config/manager/kustomization.yaml b/config/manager/kustomization.yaml new file mode 100644 index 0000000..2bcd3ee --- /dev/null +++ b/config/manager/kustomization.yaml @@ -0,0 +1,10 @@ +resources: +- manager.yaml + +generatorOptions: + disableNameSuffixHash: true + +configMapGenerator: +- name: manager-config + files: + - controller_manager_config.yaml diff --git a/config/manager/manager.yaml b/config/manager/manager.yaml new file mode 100644 index 0000000..878ad48 --- /dev/null +++ b/config/manager/manager.yaml @@ -0,0 +1,70 @@ +apiVersion: v1 +kind: Namespace +metadata: + labels: + control-plane: controller-manager + name: system +--- +apiVersion: apps/v1 +kind: Deployment +metadata: + name: controller-manager + namespace: system + labels: + control-plane: controller-manager +spec: + selector: + matchLabels: + control-plane: controller-manager + replicas: 1 + template: + metadata: + annotations: + kubectl.kubernetes.io/default-container: manager + labels: + control-plane: controller-manager + spec: + securityContext: + runAsNonRoot: true + # TODO(user): For common cases that do not require escalating privileges + # it is recommended to ensure that all your Pods/Containers are restrictive. + # More info: https://kubernetes.io/docs/concepts/security/pod-security-standards/#restricted + # Please uncomment the following code if your project does NOT have to work on old Kubernetes + # versions < 1.19 or on vendors versions which do NOT support this field by default (i.e. Openshift < 4.11 ). + # seccompProfile: + # type: RuntimeDefault + containers: + - command: + - /manager + args: + - --leader-elect + image: controller:latest + name: manager + securityContext: + allowPrivilegeEscalation: false + capabilities: + drop: + - "ALL" + livenessProbe: + httpGet: + path: /healthz + port: 8081 + initialDelaySeconds: 15 + periodSeconds: 20 + readinessProbe: + httpGet: + path: /readyz + port: 8081 + initialDelaySeconds: 5 + periodSeconds: 10 + # TODO(user): Configure the resources accordingly based on the project requirements. + # More info: https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/ + resources: + limits: + cpu: 500m + memory: 128Mi + requests: + cpu: 10m + memory: 64Mi + serviceAccountName: controller-manager + terminationGracePeriodSeconds: 10 diff --git a/config/prometheus/kustomization.yaml b/config/prometheus/kustomization.yaml new file mode 100644 index 0000000..ed13716 --- /dev/null +++ b/config/prometheus/kustomization.yaml @@ -0,0 +1,2 @@ +resources: +- monitor.yaml diff --git a/config/prometheus/monitor.yaml b/config/prometheus/monitor.yaml new file mode 100644 index 0000000..d19136a --- /dev/null +++ b/config/prometheus/monitor.yaml @@ -0,0 +1,20 @@ + +# Prometheus Monitor Service (Metrics) +apiVersion: monitoring.coreos.com/v1 +kind: ServiceMonitor +metadata: + labels: + control-plane: controller-manager + name: controller-manager-metrics-monitor + namespace: system +spec: + endpoints: + - path: /metrics + port: https + scheme: https + bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token + tlsConfig: + insecureSkipVerify: true + selector: + matchLabels: + control-plane: controller-manager diff --git a/config/rbac/auth_proxy_client_clusterrole.yaml b/config/rbac/auth_proxy_client_clusterrole.yaml new file mode 100644 index 0000000..51a75db --- /dev/null +++ b/config/rbac/auth_proxy_client_clusterrole.yaml @@ -0,0 +1,9 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + name: metrics-reader +rules: +- nonResourceURLs: + - "/metrics" + verbs: + - get diff --git a/config/rbac/auth_proxy_role.yaml b/config/rbac/auth_proxy_role.yaml new file mode 100644 index 0000000..80e1857 --- /dev/null +++ b/config/rbac/auth_proxy_role.yaml @@ -0,0 +1,17 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + name: proxy-role +rules: +- apiGroups: + - authentication.k8s.io + resources: + - tokenreviews + verbs: + - create +- apiGroups: + - authorization.k8s.io + resources: + - subjectaccessreviews + verbs: + - create diff --git a/config/rbac/auth_proxy_role_binding.yaml b/config/rbac/auth_proxy_role_binding.yaml new file mode 100644 index 0000000..ec7acc0 --- /dev/null +++ b/config/rbac/auth_proxy_role_binding.yaml @@ -0,0 +1,12 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRoleBinding +metadata: + name: proxy-rolebinding +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: ClusterRole + name: proxy-role +subjects: +- kind: ServiceAccount + name: controller-manager + namespace: system diff --git a/config/rbac/auth_proxy_service.yaml b/config/rbac/auth_proxy_service.yaml new file mode 100644 index 0000000..71f1797 --- /dev/null +++ b/config/rbac/auth_proxy_service.yaml @@ -0,0 +1,15 @@ +apiVersion: v1 +kind: Service +metadata: + labels: + control-plane: controller-manager + name: controller-manager-metrics-service + namespace: system +spec: + ports: + - name: https + port: 8443 + protocol: TCP + targetPort: https + selector: + control-plane: controller-manager diff --git a/config/rbac/kustomization.yaml b/config/rbac/kustomization.yaml new file mode 100644 index 0000000..731832a --- /dev/null +++ b/config/rbac/kustomization.yaml @@ -0,0 +1,18 @@ +resources: +# All RBAC will be applied under this service account in +# the deployment namespace. You may comment out this resource +# if your manager will use a service account that exists at +# runtime. Be sure to update RoleBinding and ClusterRoleBinding +# subjects if changing service account names. +- service_account.yaml +- role.yaml +- role_binding.yaml +- leader_election_role.yaml +- leader_election_role_binding.yaml +# Comment the following 4 lines if you want to disable +# the auth proxy (https://github.com/brancz/kube-rbac-proxy) +# which protects your /metrics endpoint. +- auth_proxy_service.yaml +- auth_proxy_role.yaml +- auth_proxy_role_binding.yaml +- auth_proxy_client_clusterrole.yaml diff --git a/config/rbac/leader_election_role.yaml b/config/rbac/leader_election_role.yaml new file mode 100644 index 0000000..4190ec8 --- /dev/null +++ b/config/rbac/leader_election_role.yaml @@ -0,0 +1,37 @@ +# permissions to do leader election. +apiVersion: rbac.authorization.k8s.io/v1 +kind: Role +metadata: + name: leader-election-role +rules: +- apiGroups: + - "" + resources: + - configmaps + verbs: + - get + - list + - watch + - create + - update + - patch + - delete +- apiGroups: + - coordination.k8s.io + resources: + - leases + verbs: + - get + - list + - watch + - create + - update + - patch + - delete +- apiGroups: + - "" + resources: + - events + verbs: + - create + - patch diff --git a/config/rbac/leader_election_role_binding.yaml b/config/rbac/leader_election_role_binding.yaml new file mode 100644 index 0000000..1d1321e --- /dev/null +++ b/config/rbac/leader_election_role_binding.yaml @@ -0,0 +1,12 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: RoleBinding +metadata: + name: leader-election-rolebinding +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: Role + name: leader-election-role +subjects: +- kind: ServiceAccount + name: controller-manager + namespace: system diff --git a/config/rbac/role.yaml b/config/rbac/role.yaml new file mode 100644 index 0000000..4555b92 --- /dev/null +++ b/config/rbac/role.yaml @@ -0,0 +1,118 @@ +--- +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + creationTimestamp: null + name: manager-role +rules: +- apiGroups: + - "" + resources: + - nodes + verbs: + - create + - delete + - get + - list + - patch + - update + - watch +- apiGroups: + - "" + resources: + - nodes/finalizers + verbs: + - update +- apiGroups: + - "" + resources: + - nodes/status + verbs: + - get + - patch + - update +- apiGroups: + - storage.k8s.io + resources: + - storageclasses + verbs: + - create + - delete + - get + - list + - patch + - update + - watch +- apiGroups: + - storage.k8s.io + resources: + - storageclasses/finalizers + verbs: + - update +- apiGroups: + - storage.k8s.io + resources: + - storageclasses/status + verbs: + - get + - patch + - update +--- +apiVersion: rbac.authorization.k8s.io/v1 +kind: Role +metadata: + creationTimestamp: null + name: manager-role + namespace: default +rules: +- apiGroups: + - batch + resources: + - cronjobs + verbs: + - create + - delete + - deletecollection + - get + - list + - patch + - update + - watch +- apiGroups: + - "" + resources: + - events + verbs: + - create + - delete + - get + - list + - patch + - update + - watch +- apiGroups: + - "" + resources: + - events/finalizers + verbs: + - update +- apiGroups: + - "" + resources: + - events/status + verbs: + - get + - patch + - update +- apiGroups: + - "" + resources: + - pods + verbs: + - create + - delete + - get + - list + - patch + - update + - watch diff --git a/config/rbac/role_binding.yaml b/config/rbac/role_binding.yaml new file mode 100644 index 0000000..2070ede --- /dev/null +++ b/config/rbac/role_binding.yaml @@ -0,0 +1,12 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRoleBinding +metadata: + name: manager-rolebinding +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: ClusterRole + name: manager-role +subjects: +- kind: ServiceAccount + name: controller-manager + namespace: system diff --git a/config/rbac/service_account.yaml b/config/rbac/service_account.yaml new file mode 100644 index 0000000..7cd6025 --- /dev/null +++ b/config/rbac/service_account.yaml @@ -0,0 +1,5 @@ +apiVersion: v1 +kind: ServiceAccount +metadata: + name: controller-manager + namespace: system diff --git a/constants/constants.go b/constants/constants.go new file mode 100644 index 0000000..0b95e8e --- /dev/null +++ b/constants/constants.go @@ -0,0 +1,10 @@ +package constants + +const ( + ProbePodNamePrefix = "cdam-probe" + NodeFinalizerName = "cdam.topolvm.io/node" + StorageClassFinalizerName = "cdam.topolvm.io/storage-class" + + ProbeNodeLabelKey = "node" + ProbeStorageClassLabelKey = "storage-class" +) diff --git a/controller/metrics.go b/controller/metrics.go new file mode 100644 index 0000000..ea34ee5 --- /dev/null +++ b/controller/metrics.go @@ -0,0 +1,85 @@ +package controller + +import ( + "github.com/prometheus/client_golang/prometheus" + "sigs.k8s.io/controller-runtime/pkg/metrics" +) + +const ( + MetricsClientSubsystem = "metrics_client" + MetricsClientFailTotalKey = "fail_total" +) + +type MetricsExporter interface { + SetLatency(node, storageClass string, readLatency, writeLatency float64) + IncrementCreateProbeFastCount(node string, storageClass string) + IncrementCreateProbeSlowCount(node string, storageClass string) +} + +type metricExporterImpl struct { + writeLatencyGauge *prometheus.GaugeVec + readLatencyGauge *prometheus.GaugeVec + createProbeFastCount *prometheus.CounterVec + createProbeSlowCount *prometheus.CounterVec +} + +func NewMetrics() MetricsExporter { + m := &metricExporterImpl{} + m.registerMetrics() + return m +} + +func (m *metricExporterImpl) registerMetrics() { + m.writeLatencyGauge = prometheus.NewGaugeVec( + prometheus.GaugeOpts{ + Namespace: "csi_driver", + Name: "io_write_latency_seconds", + Help: "IO latency of write.", + }, + []string{"node", "storage_class"}) + + metrics.Registry.MustRegister(m.writeLatencyGauge) + + m.readLatencyGauge = prometheus.NewGaugeVec( + prometheus.GaugeOpts{ + Namespace: "csi_driver", + Name: "io_read_latency_seconds", + Help: "IO latency of read.", + }, + []string{"node", "storage_class"}) + + metrics.Registry.MustRegister(m.readLatencyGauge) + + m.createProbeFastCount = prometheus.NewCounterVec( + prometheus.CounterOpts{ + Namespace: "csi_driver", + Name: "create_probe_fast_total", + Help: "The number of attempts that take less time between the creation of the Pod object and the creation of the container than the threshold.", + }, + []string{"node", "storage_class"}) + + metrics.Registry.MustRegister(m.createProbeFastCount) + + m.createProbeSlowCount = prometheus.NewCounterVec( + prometheus.CounterOpts{ + Namespace: "csi_driver", + Name: "create_probe_slow_total", + Help: "The number of attempts that take more time between the creation of the Pod object and the creation of the container than the threshold.", + }, + []string{"node", "storage_class"}) + + metrics.Registry.MustRegister(m.createProbeSlowCount) +} + +func (m *metricExporterImpl) SetLatency(node string, storageClass string, readLatency, writeLatency float64) { + m.writeLatencyGauge.WithLabelValues(node, storageClass).Set(writeLatency) + m.readLatencyGauge.WithLabelValues(node, storageClass).Set(readLatency) +} + +func (m *metricExporterImpl) IncrementCreateProbeFastCount(node string, storageClass string) { + m.createProbeFastCount.WithLabelValues(node, storageClass).Inc() +} + +func (m *metricExporterImpl) IncrementCreateProbeSlowCount(node string, storageClass string) { + m.createProbeSlowCount.WithLabelValues(node, storageClass).Inc() +} diff --git a/controller/reciever_handler.go b/controller/reciever_handler.go new file mode 100644 index 0000000..689cd52 --- /dev/null +++ b/controller/reciever_handler.go @@ -0,0 +1,37 @@ +package controller + +import ( + "bytes" + "encoding/json" + "fmt" + "net/http" + + "github.com/topolvm/csi-driver-availability-monitor/types" +) + +type ReceiverHandler struct { + metrics MetricsExporter +} + +func (rh *ReceiverHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { + buf := new(bytes.Buffer) + buf.ReadFrom(r.Body) + bodyString := buf.String() + + receivedData := types.MetricsExchangeFormat{} + err := json.Unmarshal([]byte(bodyString), &receivedData) + if err != nil { + http.Error(w, err.Error(), 500) + return + } + + rh.metrics.SetLatency(receivedData.Node, receivedData.StorageClass, receivedData.ReadLatency, receivedData.WriteLatency) + + fmt.Fprintf(w, "OK") +} + +func NewReceiverHandler(m MetricsExporter) *ReceiverHandler { + return &ReceiverHandler{ + metrics: m, + } +} diff --git a/controllers/common_test.go b/controllers/common_test.go new file mode 100644 index 0000000..b3fa9ff --- /dev/null +++ b/controllers/common_test.go @@ -0,0 +1,60 @@ +package controllers + +import ( + "context" + "os" + + corev1 "k8s.io/api/core/v1" + storagev1 "k8s.io/api/storage/v1" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + ctrl "sigs.k8s.io/controller-runtime" +) + +func prepareObjects(ctx context.Context) error { + storageClass := &storagev1.StorageClass{ + ObjectMeta: metav1.ObjectMeta{ + Name: "sc", + }, + Provisioner: "sc-provisioner", + } + _, err := ctrl.CreateOrUpdate(ctx, k8sClient, storageClass, func() error { return nil }) + if err != nil { + return err + } + + node := &corev1.Node{ + ObjectMeta: metav1.ObjectMeta{ + Name: "192.168.0.1", + Labels: map[string]string{"hoge": "fuga"}, + }, + } + _, err = ctrl.CreateOrUpdate(ctx, k8sClient, node, func() error { return nil }) + if err != nil { + return err + } + + hostname, err := os.Hostname() + if err != nil { + return err + } + pod := &corev1.Pod{ + ObjectMeta: metav1.ObjectMeta{ + Namespace: "default", + Name: hostname, + }, + Spec: corev1.PodSpec{ + Containers: []corev1.Container{ + { + Name: "controller", + Image: "dummy.image", + }, + }, + }, + } + _, err = ctrl.CreateOrUpdate(ctx, k8sClient, pod, func() error { return nil }) + if err != nil { + return err + } + + return nil +} diff --git a/controllers/event_controller.go b/controllers/event_controller.go new file mode 100644 index 0000000..d2d7e2e --- /dev/null +++ b/controllers/event_controller.go @@ -0,0 +1,207 @@ +package controllers + +import ( + "context" + "strings" + "sync" + "time" + + "github.com/topolvm/csi-driver-availability-monitor/constants" + "github.com/topolvm/csi-driver-availability-monitor/controller" + corev1 "k8s.io/api/core/v1" + apierrors "k8s.io/apimachinery/pkg/api/errors" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + ctrl "sigs.k8s.io/controller-runtime" + "sigs.k8s.io/controller-runtime/pkg/client" + "sigs.k8s.io/controller-runtime/pkg/log" +) + +var ( + eventCtrlLogger = ctrl.Log.WithName("event-reconciler") +) + +// EventReconciler reconciles a Event object +type EventReconciler struct { + client client.Client + firstPodEventTime map[string]time.Time + podCreatedEventTime map[string]time.Time + createProbeThreshold time.Duration + exporter controller.MetricsExporter + storageClasses []string + namespace string + startTime time.Time + eventTTL time.Duration + muFirstPodEventTime sync.Mutex + muPodCreatedEventTime sync.Mutex +} + +func NewEventReconciler( + client client.Client, + createProbeThreshold time.Duration, + exporter controller.MetricsExporter, + storageClasses []string, + namespace string, + eventTTL time.Duration, +) *EventReconciler { + return &EventReconciler{ + client: client, + firstPodEventTime: make(map[string]time.Time), + podCreatedEventTime: make(map[string]time.Time), + createProbeThreshold: createProbeThreshold, + exporter: exporter, + storageClasses: storageClasses, + namespace: namespace, + startTime: time.Now(), + eventTTL: eventTTL, + } +} + +func isProbePodName(s string) bool { + return strings.HasPrefix(s, constants.ProbePodNamePrefix) +} + +//+kubebuilder:rbac:namespace=default,groups=core,resources=events,verbs=get;list;watch;create;update;patch;delete +//+kubebuilder:rbac:namespace=default,groups=core,resources=events/status,verbs=get;update;patch +//+kubebuilder:rbac:namespace=default,groups=core,resources=events/finalizers,verbs=update + +// Reconcile is part of the main kubernetes reconciliation loop which aims to +// move the current state of the cluster closer to the desired state. +// +// For more details, check Reconcile and its Result here: +// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.13.0/pkg/reconcile +func (r *EventReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { + _ = log.FromContext(ctx) + + var event corev1.Event + err := r.client.Get(ctx, client.ObjectKey{Namespace: req.Namespace, Name: req.Name}, &event) + if err != nil { + if apierrors.IsNotFound(err) { + return ctrl.Result{}, nil + } + return ctrl.Result{}, err + } + if event.InvolvedObject.Kind == "Pod" && isProbePodName(event.InvolvedObject.Name) { + podName := event.InvolvedObject.Name + // Use eventTime preferentially because event.FirstTimestamp is deprecated at Kubernetes 1.25. + var eventTime metav1.MicroTime + if !event.EventTime.IsZero() { + eventTime = event.EventTime + } else { + eventTime = metav1.MicroTime(event.FirstTimestamp) + } + if !eventTime.IsZero() && eventTime.Time.After(r.startTime) { + func() { + r.muFirstPodEventTime.Lock() + defer r.muFirstPodEventTime.Unlock() + if t, ok := r.firstPodEventTime[podName]; ok { + if eventTime.Time.Before(t) { + r.firstPodEventTime[podName] = eventTime.Time + } + } else { + r.firstPodEventTime[podName] = eventTime.Time + } + }() + } + if event.Source.Component == "kubelet" && event.Reason == "Created" && eventTime.Time.After(r.startTime) { + r.muPodCreatedEventTime.Lock() + r.podCreatedEventTime[podName] = eventTime.Time + r.muPodCreatedEventTime.Unlock() + } + } + return ctrl.Result{}, nil +} + +func (r *EventReconciler) getNodeNameAndStorageClass(ctx context.Context, podName string, storageClasses []string) (string, string, error) { + var pod corev1.Pod + err := r.client.Get(ctx, client.ObjectKey{Namespace: r.namespace, Name: podName}, &pod) + if err != nil { + return "", "", err + } + + return pod.GetLabels()[constants.ProbeNodeLabelKey], pod.GetLabels()[constants.ProbeStorageClassLabelKey], nil +} + +func (r *EventReconciler) deletePod(ctx context.Context, podName string) error { + var podForDelete corev1.Pod + err := r.client.Get(ctx, client.ObjectKey{Namespace: r.namespace, Name: podName}, &podForDelete) + if err != nil { + if apierrors.IsNotFound(err) { + return nil + } + eventCtrlLogger.Error(err, "failed to get pod", "pod", podName) + return err + } + uid := podForDelete.GetUID() + resourceVersion := podForDelete.GetResourceVersion() + cond := metav1.Preconditions{ + UID: &uid, + ResourceVersion: &resourceVersion, + } + err = r.client.Delete(ctx, &podForDelete, &client.DeleteOptions{ + Preconditions: &cond, + }) + if err != nil { + if apierrors.IsNotFound(err) { + return nil + } + eventCtrlLogger.Error(err, "failed to delete pod", "pod", podName) + return err + } + return nil +} + +// SetupWithManager sets up the controller with the Manager. +func (r *EventReconciler) SetupWithManager(mgr ctrl.Manager) error { + go func() { + ctx := context.Background() + countedFlag := make(map[string]bool) + for range time.Tick(time.Second) { + func() { + r.muFirstPodEventTime.Lock() + defer r.muFirstPodEventTime.Unlock() + r.muPodCreatedEventTime.Lock() + defer r.muPodCreatedEventTime.Unlock() + for podName, firstTime := range r.firstPodEventTime { + if countedFlag[podName] { + continue + } + nodeName, storageClass, err := r.getNodeNameAndStorageClass(ctx, podName, r.storageClasses) + if err != nil { + eventCtrlLogger.Error(err, "failed to name of node and storage class related to the pod", "pod", podName) + continue + } + t, ok := r.podCreatedEventTime[podName] + if ok { + countedFlag[podName] = true + if t.Sub(firstTime) >= r.createProbeThreshold { + r.exporter.IncrementCreateProbeSlowCount(nodeName, storageClass) + err := r.deletePod(ctx, podName) + if err != nil { + continue + } + } else { + r.exporter.IncrementCreateProbeFastCount(nodeName, storageClass) + } + } else { + if time.Since(firstTime) >= r.createProbeThreshold { + countedFlag[podName] = true + r.exporter.IncrementCreateProbeSlowCount(nodeName, storageClass) + err := r.deletePod(ctx, podName) + if err != nil { + continue + } + } + } + if firstTime.Before(time.Now().Add(-r.eventTTL)) { + delete(r.firstPodEventTime, podName) + delete(countedFlag, podName) + delete(r.podCreatedEventTime, podName) + } + } + }() + } + }() + return ctrl.NewControllerManagedBy(mgr). + For(&corev1.Event{}). + Complete(r) +} diff --git a/controllers/node_controller.go b/controllers/node_controller.go new file mode 100644 index 0000000..a81eabe --- /dev/null +++ b/controllers/node_controller.go @@ -0,0 +1,321 @@ +package controllers + +import ( + "context" + "crypto/sha1" + "encoding/hex" + "fmt" + "io" + "os" + + "github.com/topolvm/csi-driver-availability-monitor/constants" + batchv1 "k8s.io/api/batch/v1" + corev1 "k8s.io/api/core/v1" + storagev1 "k8s.io/api/storage/v1" + apierrors "k8s.io/apimachinery/pkg/api/errors" + "k8s.io/apimachinery/pkg/api/resource" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + ctrl "sigs.k8s.io/controller-runtime" + "sigs.k8s.io/controller-runtime/pkg/client" + "sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" + "sigs.k8s.io/controller-runtime/pkg/log" + "sigs.k8s.io/controller-runtime/pkg/predicate" +) + +var ( + nodeCtrlLogger = ctrl.Log.WithName("node-reconciler") +) + +// NodeReconciler reconciles a Node object +type NodeReconciler struct { + client client.Client + containerImage string + namespace string + controllerURL string + monitoringStorageClasses []string + nodeSelectorLabel map[string]string + probePeriod int +} + +func NewNodeReconciler( + client client.Client, + containerImage string, + namespace string, + controllerURL string, + monitoringStorageClasses []string, + nodeSelectorLabel map[string]string, + probePeriod int, +) *NodeReconciler { + return &NodeReconciler{ + client: client, + containerImage: containerImage, + namespace: namespace, + controllerURL: controllerURL, + monitoringStorageClasses: monitoringStorageClasses, + nodeSelectorLabel: nodeSelectorLabel, + probePeriod: probePeriod, + } +} + +//+kubebuilder:rbac:namespace=default,groups=batch,resources=cronjobs,verbs=get;list;watch;create;update;patch;delete +//+kubebuilder:rbac:namespace=default,groups=core,resources=pods,verbs=get;list;watch;create;update;patch;delete +//+kubebuilder:rbac:groups=core,resources=nodes,verbs=get;list;watch;create;update;patch;delete +//+kubebuilder:rbac:groups=core,resources=nodes/status,verbs=get;update;patch +//+kubebuilder:rbac:groups=core,resources=nodes/finalizers,verbs=update + +// Reconcile is part of the main kubernetes reconciliation loop which aims to +// move the current state of the cluster closer to the desired state. +// +// For more details, check Reconcile and its Result here: +// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.13.0/pkg/reconcile +func (r *NodeReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { + _ = log.FromContext(ctx) + + var node corev1.Node + err := r.client.Get(ctx, client.ObjectKey{Name: req.Name}, &node) + if err != nil { + if apierrors.IsNotFound(err) { + return ctrl.Result{}, nil + } + return ctrl.Result{}, err + } + + if !node.DeletionTimestamp.IsZero() { + if controllerutil.ContainsFinalizer(&node, constants.NodeFinalizerName) { + for _, storageClass := range r.monitoringStorageClasses { + var storageClassForGet storagev1.StorageClass + err := r.client.Get(ctx, client.ObjectKey{Name: storageClass}, &storageClassForGet) + if err != nil { + if apierrors.IsNotFound(err) { + continue + } + return ctrl.Result{}, err + } + err = r.deleteCronJob(ctx, getCronJobName(node.Name, storageClass)) + if err != nil { + if !apierrors.IsNotFound(err) { + return ctrl.Result{}, err + } + } + } + + controllerutil.RemoveFinalizer(&node, constants.NodeFinalizerName) + err = r.client.Update(ctx, &node) + if err != nil { + return ctrl.Result{}, err + } + } + return ctrl.Result{}, nil + } + + for _, storageClass := range r.monitoringStorageClasses { + var storageClassForGet storagev1.StorageClass + err := r.client.Get(ctx, client.ObjectKey{Name: storageClass}, &storageClassForGet) + if err != nil { + if apierrors.IsNotFound(err) { + continue + } + return ctrl.Result{}, err + } + err = r.createOrUpdateJob(ctx, storageClass, node.Name) + if err != nil { + return ctrl.Result{}, err + } + } + + if !controllerutil.ContainsFinalizer(&node, constants.NodeFinalizerName) { + controllerutil.AddFinalizer(&node, constants.NodeFinalizerName) + err = r.client.Update(ctx, &node) + if err != nil { + return ctrl.Result{}, err + } + } + + return ctrl.Result{}, nil +} + +// CronJob name should be less than or equal to 52 characters. +// cf. https://kubernetes.io/docs/concepts/workloads/controllers/cron-jobs/ +// One CronJob is created per node and a StorageClass. +// It is desirable that the names of nodes and StorageClasses can be inferred from the names of CronJobs. +// However, if the node and StorageClass names are too long, the CronJob name will not fit in 52 characters. +// So we cut off the node and StorageClass names to an appropriate length and added a hash value at the end +// to balance readability and uniqueness. +func getCronJobName(nodeName, storageClass string) string { + sha1 := sha1.New() + io.WriteString(sha1, nodeName+"\000"+storageClass) + hashedName := hex.EncodeToString(sha1.Sum(nil)) + + if len(nodeName) > 15 { + nodeName = nodeName[:15] + } + if len(storageClass) > 18 { + storageClass = storageClass[:18] + } + return fmt.Sprintf("%s-%s-%s-%s", constants.ProbePodNamePrefix, nodeName, storageClass, hashedName[:6]) +} + +func (r *NodeReconciler) deleteCronJob(ctx context.Context, cronJobName string) error { + var cronJobForDelete batchv1.CronJob + err := r.client.Get(ctx, client.ObjectKey{Namespace: r.namespace, Name: cronJobName}, &cronJobForDelete) + if err != nil { + nodeCtrlLogger.Error(err, "failed to get cronJob", "cronJob", cronJobName) + return err + } + uid := cronJobForDelete.GetUID() + resourceVersion := cronJobForDelete.GetResourceVersion() + cond := metav1.Preconditions{ + UID: &uid, + ResourceVersion: &resourceVersion, + } + err = r.client.Delete(ctx, &cronJobForDelete, &client.DeleteOptions{ + Preconditions: &cond, + }) + if err != nil { + nodeCtrlLogger.Error(err, "failed to delete cronJob", "cronJob", cronJobName) + return err + } + return nil +} + +func convertPeriodToCronSchedule(period int) string { + return fmt.Sprintf("*/%d * * * *", period) +} + +func (r *NodeReconciler) createOrUpdateJob(ctx context.Context, storageClass, nodeName string) error { + nodeCtrlLogger.Info("createOrUpdateJob") + defer nodeCtrlLogger.Info("createOrUpdateJob Finished") + + job := &batchv1.CronJob{} + job.SetNamespace(r.namespace) + job.SetName(getCronJobName(nodeName, storageClass)) + label := map[string]string{ + constants.ProbeNodeLabelKey: nodeName, + constants.ProbeStorageClassLabelKey: storageClass, + } + job.SetLabels(label) + + op, err := ctrl.CreateOrUpdate(ctx, r.client, job, func() error { + var controllerPod corev1.Pod + hostname, err := os.Hostname() + if err != nil { + return err + } + err = r.client.Get(ctx, client.ObjectKey{Namespace: r.namespace, Name: hostname}, &controllerPod) + if err != nil { + return err + } + err = controllerutil.SetControllerReference(&controllerPod, job, r.client.Scheme()) + if err != nil { + return err + } + + job.Spec.ConcurrencyPolicy = batchv1.ForbidConcurrent + job.Spec.Schedule = convertPeriodToCronSchedule(r.probePeriod) + // according this doc https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.23/#jobspec-v1-batch, + // selector is set by the system + // job.Spec.JobTemplate.ObjectMeta.Labels = map[string]string{"name": "cdam-probe"} + + job.Spec.JobTemplate.Spec.Template.SetLabels(label) + + if len(job.Spec.JobTemplate.Spec.Template.Spec.Containers) != 1 { + job.Spec.JobTemplate.Spec.Template.Spec.Containers = []corev1.Container{{}} + } + + volumeName := "genericvol" + container := &job.Spec.JobTemplate.Spec.Template.Spec.Containers[0] + container.Name = "probe" + container.Image = r.containerImage + container.VolumeMounts = []corev1.VolumeMount{ + { + Name: volumeName, + MountPath: "/mounted", + }, + } + + container.Args = []string{ + "probe", + fmt.Sprintf("--destination-address=%s", r.controllerURL), + "--path=/mounted/", + fmt.Sprintf("--node-name=%s", nodeName), + fmt.Sprintf("--storage-class=%s", storageClass), + } + + var userID int64 = 1001 + var groupID int64 = 1001 + job.Spec.JobTemplate.Spec.Template.Spec.SecurityContext = &corev1.PodSecurityContext{ + RunAsUser: &userID, + RunAsGroup: &groupID, + FSGroup: &groupID, + } + + job.Spec.JobTemplate.Spec.Template.Spec.RestartPolicy = corev1.RestartPolicyNever + var periodSeconds int64 = 5 + job.Spec.JobTemplate.Spec.Template.Spec.TerminationGracePeriodSeconds = &periodSeconds + + job.Spec.JobTemplate.Spec.Template.Spec.Affinity = &corev1.Affinity{ + NodeAffinity: &corev1.NodeAffinity{ + RequiredDuringSchedulingIgnoredDuringExecution: &corev1.NodeSelector{ + NodeSelectorTerms: []corev1.NodeSelectorTerm{ + { + MatchExpressions: []corev1.NodeSelectorRequirement{ + { + Key: corev1.LabelHostname, + Operator: corev1.NodeSelectorOpIn, + Values: []string{nodeName}, + }, + }, + }, + }, + }, + }, + } + + job.Spec.JobTemplate.Spec.Template.Spec.Volumes = []corev1.Volume{ + { + Name: volumeName, + VolumeSource: corev1.VolumeSource{ + Ephemeral: &corev1.EphemeralVolumeSource{ + VolumeClaimTemplate: &corev1.PersistentVolumeClaimTemplate{ + Spec: corev1.PersistentVolumeClaimSpec{ + AccessModes: []corev1.PersistentVolumeAccessMode{corev1.ReadWriteOnce}, + StorageClassName: &storageClass, + Resources: corev1.ResourceRequirements{ + Requests: map[corev1.ResourceName]resource.Quantity{ + corev1.ResourceStorage: *resource.NewQuantity( + 100*1024*1024, resource.BinarySI), + }, + }, + }, + }, + }, + }, + }, + } + + return nil + }) + + if err != nil { + return fmt.Errorf("failed to create CronJob on node %s of storageclass %s: %w", nodeName, storageClass, err) + } + if op != controllerutil.OperationResultNone { + nodeCtrlLogger.Info(fmt.Sprintf("CronJob successfully created node %s of storageclass %s: %s", nodeName, storageClass, op)) + } + return nil +} + +// SetupWithManager sets up the controller with the Manager. +func (r *NodeReconciler) SetupWithManager(mgr ctrl.Manager) error { + pred, err := predicate.LabelSelectorPredicate(metav1.LabelSelector{ + MatchLabels: r.nodeSelectorLabel, + }) + if err != nil { + return err + } + + return ctrl.NewControllerManagedBy(mgr). + For(&corev1.Node{}). + WithEventFilter(pred). + Complete(r) +} diff --git a/controllers/node_controller_test.go b/controllers/node_controller_test.go new file mode 100644 index 0000000..1c1df83 --- /dev/null +++ b/controllers/node_controller_test.go @@ -0,0 +1,94 @@ +package controllers + +import ( + "context" + "time" + + . "github.com/onsi/ginkgo/v2" + . "github.com/onsi/gomega" + "github.com/topolvm/csi-driver-availability-monitor/constants" + batchv1 "k8s.io/api/batch/v1" + corev1 "k8s.io/api/core/v1" + apierrors "k8s.io/apimachinery/pkg/api/errors" + ctrl "sigs.k8s.io/controller-runtime" + "sigs.k8s.io/controller-runtime/pkg/client" + "sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" +) + +var _ = Describe("Node controller", func() { + ctx := context.Background() + var stopFunc func() + + BeforeEach(func() { + mgr, err := ctrl.NewManager(cfg, ctrl.Options{ + Scheme: scheme, + }) + Expect(err).NotTo(HaveOccurred()) + + err = prepareObjects(ctx) + Expect(err).NotTo(HaveOccurred()) + + monitoringStorageClasses := []string{"sc"} + nodeReconciler := NewNodeReconciler( + k8sClient, + "dummy", + "default", + "http://localhost:8082", + monitoringStorageClasses, + make(map[string]string), + 1, + ) + err = nodeReconciler.SetupWithManager(mgr) + Expect(err).NotTo(HaveOccurred()) + + storageClassReconciler := NewStorageClassReconciler(k8sClient, "default", monitoringStorageClasses) + err = storageClassReconciler.SetupWithManager(mgr) + Expect(err).NotTo(HaveOccurred()) + + ctx, cancel := context.WithCancel(ctx) + stopFunc = cancel + go func() { + err := mgr.Start(ctx) + if err != nil { + panic(err) + } + }() + time.Sleep(100 * time.Millisecond) + }) + + AfterEach(func() { + stopFunc() + time.Sleep(100 * time.Millisecond) + }) + + It("should set finalizer and then delete CronJob successfully", func() { + By("confirming that the finalizer is set") + var node corev1.Node + Eventually(func(g Gomega) { + err := k8sClient.Get(ctx, client.ObjectKey{Name: "192.168.0.1"}, &node) + g.Expect(err).NotTo(HaveOccurred()) + g.Expect(controllerutil.ContainsFinalizer(&node, constants.NodeFinalizerName)).Should(BeTrue()) + }).Should(Succeed()) + + Eventually(func(g Gomega) { + var cronJobList batchv1.CronJobList + err := k8sClient.List(ctx, &cronJobList) + g.Expect(err).NotTo(HaveOccurred()) + g.Expect(cronJobList.Items).ShouldNot(BeEmpty()) + }).Should(Succeed()) + + By("confirming that the CronJob is deleted successfully") + err := k8sClient.Delete(ctx, &node) + Expect(err).NotTo(HaveOccurred()) + + Eventually(func(g Gomega) { + err := k8sClient.Get(ctx, client.ObjectKey{Name: "192.168.0.1"}, &node) + g.Expect(apierrors.IsNotFound(err)).Should(BeTrue()) + + var cronJobList batchv1.CronJobList + err = k8sClient.List(ctx, &cronJobList) + g.Expect(err).NotTo(HaveOccurred()) + g.Expect(cronJobList.Items).Should(BeEmpty()) + }).Should(Succeed()) + }) +}) diff --git a/controllers/storageclass_controller.go b/controllers/storageclass_controller.go new file mode 100644 index 0000000..f8336b7 --- /dev/null +++ b/controllers/storageclass_controller.go @@ -0,0 +1,103 @@ +package controllers + +import ( + "context" + + "github.com/topolvm/csi-driver-availability-monitor/constants" + batchv1 "k8s.io/api/batch/v1" + storagev1 "k8s.io/api/storage/v1" + apierrors "k8s.io/apimachinery/pkg/api/errors" + ctrl "sigs.k8s.io/controller-runtime" + "sigs.k8s.io/controller-runtime/pkg/client" + "sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" + "sigs.k8s.io/controller-runtime/pkg/log" + "sigs.k8s.io/controller-runtime/pkg/predicate" +) + +// StorageClassReconciler reconciles a StorageClass object +type StorageClassReconciler struct { + client client.Client + namespace string + monitoringStorageClasses map[string]struct{} +} + +func NewStorageClassReconciler( + client client.Client, + namespace string, + monitoringStorageClasses []string, +) *StorageClassReconciler { + storageClass := make(map[string]struct{}) + for _, sc := range monitoringStorageClasses { + storageClass[sc] = struct{}{} + } + return &StorageClassReconciler{ + client: client, + namespace: namespace, + monitoringStorageClasses: storageClass, + } +} + +//+kubebuilder:rbac:namespace=default,groups=batch,resources=cronjobs,verbs=get;list;watch;create;update;patch;delete;deletecollection +//+kubebuilder:rbac:groups=storage.k8s.io,resources=storageclasses,verbs=get;list;watch;create;update;patch;delete +//+kubebuilder:rbac:groups=storage.k8s.io,resources=storageclasses/status,verbs=get;update;patch +//+kubebuilder:rbac:groups=storage.k8s.io,resources=storageclasses/finalizers,verbs=update + +// Reconcile is part of the main kubernetes reconciliation loop which aims to +// move the current state of the cluster closer to the desired state. +// +// For more details, check Reconcile and its Result here: +// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.13.0/pkg/reconcile +func (r *StorageClassReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { + _ = log.FromContext(ctx) + + var storageClass storagev1.StorageClass + err := r.client.Get(ctx, client.ObjectKey{Name: req.Name}, &storageClass) + if err != nil { + if apierrors.IsNotFound(err) { + return ctrl.Result{}, nil + } + return ctrl.Result{}, err + } + + if !storageClass.DeletionTimestamp.IsZero() { + if controllerutil.ContainsFinalizer(&storageClass, constants.StorageClassFinalizerName) { + label := map[string]string{ + "storage-class": req.Name, + } + err := r.client.DeleteAllOf(ctx, &batchv1.CronJob{}, client.InNamespace(r.namespace), client.MatchingLabels(label)) + if err != nil { + return ctrl.Result{}, err + } + + controllerutil.RemoveFinalizer(&storageClass, constants.StorageClassFinalizerName) + err = r.client.Update(ctx, &storageClass) + if err != nil { + return ctrl.Result{}, err + } + } + return ctrl.Result{}, nil + } + + if !controllerutil.ContainsFinalizer(&storageClass, constants.StorageClassFinalizerName) { + controllerutil.AddFinalizer(&storageClass, constants.StorageClassFinalizerName) + err = r.client.Update(ctx, &storageClass) + if err != nil { + return ctrl.Result{}, err + } + } + + return ctrl.Result{}, nil +} + +// SetupWithManager sets up the controller with the Manager. +func (r *StorageClassReconciler) SetupWithManager(mgr ctrl.Manager) error { + pred := predicate.NewPredicateFuncs(func(object client.Object) bool { + _, ok := r.monitoringStorageClasses[object.GetName()] + return ok + }) + + return ctrl.NewControllerManagedBy(mgr). + For(&storagev1.StorageClass{}). + WithEventFilter(pred). + Complete(r) +} diff --git a/controllers/storageclass_controller_test.go b/controllers/storageclass_controller_test.go new file mode 100644 index 0000000..4d1a341 --- /dev/null +++ b/controllers/storageclass_controller_test.go @@ -0,0 +1,97 @@ +package controllers + +import ( + "context" + "time" + + . "github.com/onsi/ginkgo/v2" + . "github.com/onsi/gomega" + "github.com/topolvm/csi-driver-availability-monitor/constants" + batchv1 "k8s.io/api/batch/v1" + storagev1 "k8s.io/api/storage/v1" + apierrors "k8s.io/apimachinery/pkg/api/errors" + ctrl "sigs.k8s.io/controller-runtime" + "sigs.k8s.io/controller-runtime/pkg/client" + "sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" +) + +var _ = Describe("StorageClass controller", func() { + ctx := context.Background() + var stopFunc func() + + BeforeEach(func() { + mgr, err := ctrl.NewManager(cfg, ctrl.Options{ + Scheme: scheme, + }) + Expect(err).NotTo(HaveOccurred()) + + err = prepareObjects(ctx) + Expect(err).NotTo(HaveOccurred()) + + monitoringStorageClasses := []string{"sc"} + nodeReconciler := NewNodeReconciler( + k8sClient, + "dummy", + "default", + "http://localhost:8082", + monitoringStorageClasses, + make(map[string]string), + 1, + ) + err = nodeReconciler.SetupWithManager(mgr) + Expect(err).NotTo(HaveOccurred()) + + storageClassReconciler := NewStorageClassReconciler(k8sClient, "default", monitoringStorageClasses) + err = storageClassReconciler.SetupWithManager(mgr) + Expect(err).NotTo(HaveOccurred()) + + ctx, cancel := context.WithCancel(ctx) + stopFunc = cancel + go func() { + err := mgr.Start(ctx) + if err != nil { + panic(err) + } + }() + time.Sleep(100 * time.Millisecond) + }) + + AfterEach(func() { + stopFunc() + time.Sleep(100 * time.Millisecond) + }) + + It("should set finalizer and then delete StorageClass successfully", func() { + By("confirming that the finalizer is set") + var storageClass storagev1.StorageClass + Eventually(func(g Gomega) { + err := k8sClient.Get(ctx, client.ObjectKey{Name: "sc"}, &storageClass) + g.Expect(err).NotTo(HaveOccurred()) + g.Expect(controllerutil.ContainsFinalizer(&storageClass, constants.StorageClassFinalizerName)).Should(BeTrue()) + }).Should(Succeed()) + + Eventually(func(g Gomega) { + var cronJobList batchv1.CronJobList + err := k8sClient.List(ctx, &cronJobList) + g.Expect(err).NotTo(HaveOccurred()) + g.Expect(cronJobList.Items).ShouldNot(BeEmpty()) + }).Should(Succeed()) + + By("confirming that the StorageClass is deleted successfully") + err := k8sClient.Delete(ctx, &storageClass) + Expect(err).NotTo(HaveOccurred()) + + Eventually(func(g Gomega) { + err := k8sClient.Get(ctx, client.ObjectKey{Name: "sc"}, &storageClass) + g.Expect(apierrors.IsNotFound(err)).Should(BeTrue()) + + var cronJobList batchv1.CronJobList + label := map[string]string{ + "storage-class": "sc", + } + err = k8sClient.List(ctx, &cronJobList, client.MatchingLabels(label)) + g.Expect(err).NotTo(HaveOccurred()) + g.Expect(cronJobList.Items).Should(BeEmpty()) + }).Should(Succeed()) + }) +}) diff --git a/controllers/suite_test.go b/controllers/suite_test.go new file mode 100644 index 0000000..2143435 --- /dev/null +++ b/controllers/suite_test.go @@ -0,0 +1,76 @@ +package controllers + +import ( + "path/filepath" + "testing" + "time" + + . "github.com/onsi/ginkgo/v2" + . "github.com/onsi/gomega" + + batchv1 "k8s.io/api/batch/v1" + corev1 "k8s.io/api/core/v1" + storagev1 "k8s.io/api/storage/v1" + "k8s.io/apimachinery/pkg/runtime" + "k8s.io/client-go/rest" + "sigs.k8s.io/controller-runtime/pkg/client" + "sigs.k8s.io/controller-runtime/pkg/envtest" + logf "sigs.k8s.io/controller-runtime/pkg/log" + "sigs.k8s.io/controller-runtime/pkg/log/zap" + //+kubebuilder:scaffold:imports +) + +// These tests use Ginkgo (BDD-style Go testing framework). Refer to +// http://onsi.github.io/ginkgo/ to learn more about Ginkgo. + +var cfg *rest.Config +var k8sClient client.Client +var testEnv *envtest.Environment +var scheme = runtime.NewScheme() + +func TestAPIs(t *testing.T) { + RegisterFailHandler(Fail) + + SetDefaultEventuallyPollingInterval(time.Second) + SetDefaultEventuallyTimeout(10 * time.Second) + + RunSpecs(t, "Controller Suite") +} + +var _ = BeforeSuite(func() { + logf.SetLogger(zap.New(zap.WriteTo(GinkgoWriter), zap.UseDevMode(true))) + + By("bootstrapping test environment") + testEnv = &envtest.Environment{ + CRDDirectoryPaths: []string{filepath.Join("..", "config", "crd", "bases")}, + ErrorIfCRDPathMissing: false, + } + + var err error + // cfg is defined in this file globally. + cfg, err = testEnv.Start() + Expect(err).NotTo(HaveOccurred()) + Expect(cfg).NotTo(BeNil()) + + err = corev1.AddToScheme(scheme) + Expect(err).NotTo(HaveOccurred()) + + err = batchv1.AddToScheme(scheme) + Expect(err).NotTo(HaveOccurred()) + + err = storagev1.AddToScheme(scheme) + Expect(err).NotTo(HaveOccurred()) + + //+kubebuilder:scaffold:scheme + + k8sClient, err = client.New(cfg, client.Options{Scheme: scheme}) + Expect(err).NotTo(HaveOccurred()) + Expect(k8sClient).NotTo(BeNil()) + +}) + +var _ = AfterSuite(func() { + By("tearing down the test environment") + err := testEnv.Stop() + Expect(err).NotTo(HaveOccurred()) +}) diff --git a/docs/design.md b/docs/design.md new file mode 100644 index 0000000..d9f5b85 --- /dev/null +++ b/docs/design.md @@ -0,0 +1,84 @@ +# Design notes + +## Motivation + +You cannot tell if you can successfully create PVs via the storage plugin until you try to create PVs. +So users may only notice the failure when they try to create PVs. + +To avoid such a situation, the storage administrator should be aware of the problem before users realize it. + +## Goal + +- Verify that the storage driver is working properly +- Verify that the PV can be accessed +- Check for all specified StorageClasses +- Also check the storage plugin that creates node-local volumes on the specified node (e.g. TopoLVM) +- Output the monitoring results as Prometheus metrics + +## Architecture + +```mermaid +flowchart TB + Prometheus[Prometheus,
VictoriaMetrics] -->|scrape| controller + controller[controller] + controller -->|create| cronjobA[CronJob] -->|create| probeAA + controller -->|create| cronjobB[CronJob] -->|create| probeAB + controller -->|create| cronjobC[CronJob] -->|create| probeBA + controller -->|create| cronjobD[CronJob] -->|create| probeBB + probeAA -->|use| volumeA[(Generic Ephemeral Volume)] + probeAB -->|use| volumeB[(Generic Ephemeral Volume)] + probeBA -->|use| volumeC[(Generic Ephemeral Volume)] + probeBB -->|use| volumeD[(Generic Ephemeral Volume)] + probeAA -->|post metrics| controller + probeAB -->|post metrics| controller + probeBA -->|post metrics| controller + probeBB -->|post metrics| controller + subgraph NodeA + probeAA[Probe] + probeAB[Probe] + end + subgraph NodeB + probeBA[Probe] + probeBB[Probe] + end + volumeA -.-|related| storageclassA[StorageClass A] + volumeB -.-|related| storageclassB[StorageClass B] + volumeC -.-|related| storageclassA[StorageClass A] + volumeD -.-|related| storageclassB[StorageClass B] + + %% This is a workaround to make volumeA and volumeB closer. + subgraph volumeAB [ ] + volumeA + volumeB + end + style volumeAB fill-opacity:0,stroke-width:0px + + %% This is a workaround to make volumeC and volumeD closer. + subgraph volumeCD [ ] + volumeC + volumeD + end + style volumeCD fill-opacity:0,stroke-width:0px +``` + +### How csi-driver-availability-monitor works + +csi-driver-availability-monitor works as follows: + +1. The controller creates CronJobs for each node and StorageClass. +2. A CronJob periodically creates a probe pod. +3. A Probe pod requests to create a Generic Ephemeral Volume via the related StorageClass. +4. The controller monitors the pod creation events and measures how long it takes to create probe pods. + (This indirectly measures the time required for volume provisioning.) Then it exposes the result as Prometheus metrics. +5. Once the prob pods are created, they try to read and write data from and to the Generic Ephemeral Volume, and measure the I/O latency. Then they post the result to the controller. +6. When the controller receives the requests from the probe pods, it exposes the result as Prometheus Metrics. + +### Metrics design decision + +As explained in [README.md](../README.md#prometheus-metrics), metrics related to PV creation are output in the form of whether the PV creation was completed within a certain time (`create_probe_fast_total` or `create_probe_slow_total`), not the time taken for the creation. + +If you try to output the time taken to create a PV, the metrics would not be output until the PV is actually created. +Then, if the PV cannot be created due to some problems, the metric would not be output, and +you would not realize that there are some problems. + +Therefore, if the PV is not created within a certain time, `create_probe_slow_total` counter is incremented so that you can notice the problem even when the PV creation is completely stopped. diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..83355dd --- /dev/null +++ b/go.mod @@ -0,0 +1,74 @@ +module github.com/topolvm/csi-driver-availability-monitor + +go 1.18 + +require ( + github.com/onsi/ginkgo/v2 v2.1.6 + github.com/onsi/gomega v1.21.1 + github.com/prometheus/client_golang v1.13.0 + github.com/prometheus/common v0.37.0 + github.com/spf13/cobra v1.4.0 + k8s.io/api v0.24.2 + k8s.io/apimachinery v0.24.2 + k8s.io/client-go v0.24.2 + k8s.io/klog/v2 v2.60.1 + sigs.k8s.io/controller-runtime v0.12.2 + sigs.k8s.io/yaml v1.3.0 +) + +require ( + github.com/PuerkitoBio/purell v1.1.1 // indirect + github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.1.2 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/emicklei/go-restful v2.9.5+incompatible // indirect + github.com/evanphx/json-patch v4.12.0+incompatible // indirect + github.com/fsnotify/fsnotify v1.5.1 // indirect + github.com/go-logr/logr v1.2.0 // indirect + github.com/go-logr/zapr v1.2.0 // indirect + github.com/go-openapi/jsonpointer v0.19.5 // indirect + github.com/go-openapi/jsonreference v0.19.5 // indirect + github.com/go-openapi/swag v0.19.14 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/google/gnostic v0.5.7-v3refs // indirect + github.com/google/go-cmp v0.5.8 // indirect + github.com/google/gofuzz v1.1.0 // indirect + github.com/google/uuid v1.1.2 // indirect + github.com/imdario/mergo v0.3.12 // indirect + github.com/inconshreveable/mousetrap v1.0.0 // indirect + github.com/josharian/intern v1.0.0 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/mailru/easyjson v0.7.6 // indirect + github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/prometheus/client_model v0.2.0 // indirect + github.com/prometheus/procfs v0.8.0 // indirect + github.com/spf13/pflag v1.0.5 // indirect + go.uber.org/atomic v1.7.0 // indirect + go.uber.org/multierr v1.6.0 // indirect + go.uber.org/zap v1.19.1 // indirect + golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect + golang.org/x/oauth2 v0.0.0-20220223155221-ee480838109b // indirect + golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect + golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect + golang.org/x/text v0.3.7 // indirect + golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 // indirect + gomodules.xyz/jsonpatch/v2 v2.2.0 // indirect + google.golang.org/appengine v1.6.7 // indirect + google.golang.org/protobuf v1.28.1 // indirect + gopkg.in/inf.v0 v0.9.1 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect + k8s.io/apiextensions-apiserver v0.24.2 // indirect + k8s.io/component-base v0.24.2 // indirect + k8s.io/kube-openapi v0.0.0-20220328201542-3ee0da9b0b42 // indirect + k8s.io/utils v0.0.0-20220210201930-3a6ce19ff2f9 // indirect + sigs.k8s.io/json v0.0.0-20211208200746-9f7c6b3444d2 // indirect + sigs.k8s.io/structured-merge-diff/v4 v4.2.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..66ae4cd --- /dev/null +++ b/go.sum @@ -0,0 +1,969 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= +cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= +cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To= +cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4= +cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M= +cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc= +cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk= +cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs= +cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc= +cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY= +cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI= +cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk= +cloud.google.com/go v0.78.0/go.mod h1:QjdrLG0uq+YwhjoVOLsS1t7TW8fs36kLs4XO5R5ECHg= +cloud.google.com/go v0.79.0/go.mod h1:3bzgcEeQlzbuEAYu4mrWhKqWjmpprinYgKJLgKHnbb8= +cloud.google.com/go v0.81.0/go.mod h1:mk/AM35KwGk/Nm2YSeZbxXdrNK3KZOYHmLkOqC2V6E0= +cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o= +cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE= +cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc= +cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg= +cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc= +cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ= +cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= +cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk= +cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk= +cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I= +cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw= +cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA= +cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU= +cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw= +cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos= +cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk= +cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs= +cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0= +dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU= 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a/hack/boilerplate.go.txt b/hack/boilerplate.go.txt new file mode 100644 index 0000000..e69de29 diff --git a/main.go b/main.go new file mode 100644 index 0000000..f951087 --- /dev/null +++ b/main.go @@ -0,0 +1,7 @@ +package main + +import "github.com/topolvm/csi-driver-availability-monitor/cmd" + +func main() { + cmd.Execute() +} diff --git a/probe/diskmetrics.go b/probe/diskmetrics.go new file mode 100644 index 0000000..17c96d7 --- /dev/null +++ b/probe/diskmetrics.go @@ -0,0 +1,99 @@ +package probe + +import ( + "bytes" + "context" + "fmt" + "io" + "os" + "os/exec" + "strconv" +) + +type diskMetricsImpl struct { + path string +} + +func NewDiskMetrics(path string) DiskMetricsInterface { + return &diskMetricsImpl{ + path: path, + } +} + +func execWrap(stdin []byte, command string, args ...string) ([]byte, error) { + c := exec.Command(command, args...) + c.Stderr = os.Stderr + if stdin != nil { + c.Stdin = bytes.NewReader(stdin) + } + stdout, err := c.StdoutPipe() + if err != nil { + return nil, err + } + if err := c.Start(); err != nil { + return nil, err + } + out, err := io.ReadAll(stdout) + if err != nil { + return nil, err + } + if err := c.Wait(); err != nil { + return nil, err + } + + return out, nil +} + +func parseFioResult(fioOutput []byte, property string) (float64, error) { + jqOut, err := execWrap( + fioOutput, + "jq", + fmt.Sprintf(".jobs[0].%s.lat_ns.mean", property), + ) + if err != nil { + return 0.0, err + } + + stringJqOut := string(jqOut) + + actualNumber, err := strconv.ParseFloat(stringJqOut[0:len(stringJqOut)-1], 64) + if err != nil { + return 0.0, err + } + + // actualNumber is nano-seconds, so convert it to seconds order + return actualNumber / 1_000_000_000, nil +} + +func (mtr *diskMetricsImpl) GetMetrics(ctx context.Context) (*DiskMetrics, error) { + fioStdout, err := execWrap( + nil, + "fio", + fmt.Sprintf("-filename=%s/.iotest", mtr.path), + "-direct=1", + "-rw=readwrite", + "-bs=4k", + "-size=50M", + "-numjobs=1", + "-runtime=1", + "-group_reporting", + "-name=run1", + "--output-format=json", + ) + if err != nil { + return nil, err + } + + var metrics DiskMetrics + metrics.ReadLatency, err = parseFioResult(fioStdout, "read") + if err != nil { + return nil, err + } + + metrics.WriteLatency, err = parseFioResult(fioStdout, "write") + if err != nil { + return nil, err + } + + return &metrics, nil +} diff --git a/probe/exporter.go b/probe/exporter.go new file mode 100644 index 0000000..1c45210 --- /dev/null +++ b/probe/exporter.go @@ -0,0 +1,53 @@ +package probe + +import ( + "bytes" + "encoding/json" + "net/http" + "time" + + "github.com/topolvm/csi-driver-availability-monitor/types" +) + +type diskInfoImpl struct { + url string + node string + storageClass string +} + +const ( + maxRetryCount = 3 + retryIntervalSec = 3 +) + +func NewDiskInfoExporter(url string, node string, storageClass string) DiskInfoExporter { + return &diskInfoImpl{ + url: url, + node: node, + storageClass: storageClass, + } +} + +func (di *diskInfoImpl) Export(metrics DiskMetrics) error { + m := types.MetricsExchangeFormat{ + Node: di.node, + StorageClass: di.storageClass, + WriteLatency: metrics.WriteLatency, + ReadLatency: metrics.ReadLatency, + } + + s, err := json.Marshal(m) + if err != nil { + return err + } + + for retryCounter := 0; retryCounter < maxRetryCount; retryCounter++ { + _, err = http.Post(di.url, "application/json", bytes.NewReader(s)) + if err == nil { + return nil + } + time.Sleep(time.Second * retryIntervalSec) + } + + return err +} diff --git a/probe/probe.go b/probe/probe.go new file mode 100644 index 0000000..f3223ae --- /dev/null +++ b/probe/probe.go @@ -0,0 +1,23 @@ +package probe + +import ( + "context" +) + +func SubMain(node string, measurePath string, storageClass string, serverURI string) error { + context := context.Background() + diskMetrics := NewDiskMetrics(measurePath) + infoExporter := NewDiskInfoExporter(serverURI, node, storageClass) + + metrics, err := diskMetrics.GetMetrics(context) + if err != nil { + return err + } + + err = infoExporter.Export(*metrics) + if err != nil { + return err + } + + return nil +} diff --git a/probe/types.go b/probe/types.go new file mode 100644 index 0000000..3766101 --- /dev/null +++ b/probe/types.go @@ -0,0 +1,16 @@ +package probe + +import "context" + +type DiskMetrics struct { + ReadLatency float64 + WriteLatency float64 +} + +type DiskMetricsInterface interface { + GetMetrics(ctx context.Context) (*DiskMetrics, error) +} + +type DiskInfoExporter interface { + Export(metrics DiskMetrics) error +} diff --git a/runners/receiver.go b/runners/receiver.go new file mode 100644 index 0000000..755af84 --- /dev/null +++ b/runners/receiver.go @@ -0,0 +1,58 @@ +package runners + +import ( + "context" + "log" + "net/http" + "time" + + "github.com/topolvm/csi-driver-availability-monitor/controller" + ctrl "sigs.k8s.io/controller-runtime" + "sigs.k8s.io/controller-runtime/pkg/manager" +) + +var ( + receiverLogger = ctrl.Log.WithName("receiver") +) + +type receiverRunner struct { + exporter controller.MetricsExporter +} + +func NewReceiverRunner(exporter controller.MetricsExporter) manager.Runnable { + return &receiverRunner{ + exporter: exporter, + } +} + +func (r *receiverRunner) Start(ctx context.Context) error { + receiverLogger.Info("receiver Start") + defer receiverLogger.Info("receiver End") + rh := controller.NewReceiverHandler(r.exporter) + + mux := http.NewServeMux() + mux.Handle("/", rh) + + s := &http.Server{ + Addr: ":8082", + Handler: mux, + ReadTimeout: 10 * time.Second, + WriteTimeout: 10 * time.Second, + MaxHeaderBytes: 1 << 20, + } + + go func() { + receiverLogger.Info("goroutine func") + defer receiverLogger.Info("goroutine func end") + err := s.ListenAndServe() + if err != nil { + log.Fatal(err) + } + }() + + <-ctx.Done() + receiverLogger.Info("now context Done") + s.Close() + receiverLogger.Info("now context Done end") + return nil +} diff --git a/types/types.go b/types/types.go new file mode 100644 index 0000000..e3d0490 --- /dev/null +++ b/types/types.go @@ -0,0 +1,8 @@ +package types + +type MetricsExchangeFormat struct { + Node string `json:"node"` + StorageClass string `json:"storage_class"` + WriteLatency float64 `json:"write_latency"` + ReadLatency float64 `json:"read_latency"` +}