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Merge pull request #337 from flanksource/kubernetes-check
feat: add kubernetes check
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| package checks | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
|
||
| "github.com/flanksource/canary-checker/api/context" | ||
| "github.com/flanksource/canary-checker/api/external" | ||
| v1 "github.com/flanksource/canary-checker/api/v1" | ||
| "github.com/flanksource/canary-checker/pkg" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
| "k8s.io/client-go/dynamic" | ||
| ) | ||
|
|
||
| type KubernetesChecker struct{} | ||
|
|
||
| func (c *KubernetesChecker) Type() string { | ||
| return "kubernetes" | ||
| } | ||
|
|
||
| // Run: Check every entry from config according to Checker interface | ||
| // Returns check result and metrics | ||
| func (c *KubernetesChecker) Run(ctx *context.Context) []*pkg.CheckResult { | ||
| var results []*pkg.CheckResult | ||
| for _, conf := range ctx.Canary.Spec.Kubernetes { | ||
| results = append(results, c.Check(ctx, conf)) | ||
| } | ||
| return results | ||
| } | ||
|
|
||
| // CheckConfig : Check every ldap entry for lookup and auth | ||
| // Returns check result and metrics | ||
| func (c *KubernetesChecker) Check(ctx *context.Context, extConfig external.Check) *pkg.CheckResult { | ||
| check := extConfig.(v1.KubernetesCheck) | ||
| result := pkg.Success(check, ctx.Canary) | ||
| client, err := ctx.Kommons.GetClientByKind(check.Kind) | ||
| if err != nil { | ||
| return result.Failf("Failed to get client for kind %s: %v", check.Kind, err) | ||
| } | ||
| namespaces, err := getNamespaces(ctx, check) | ||
| if err != nil { | ||
| return result.Failf("Failed to get namespaces: %v", err) | ||
| } | ||
| var allResources []unstructured.Unstructured | ||
| differentReadyStatus := make(map[string]string) | ||
| for _, namespace := range namespaces { | ||
| resources, err := getResourcesFromNamespace(ctx, client, check, namespace) | ||
| if err != nil { | ||
| return result.Failf("failed to get resources: %v. namespace: %v", err, namespace) | ||
| } | ||
| for _, resource := range resources { | ||
| ready, msg := ctx.Kommons.IsReady(&resource) | ||
| if ready != check.CheckReady() { | ||
| differentReadyStatus[fmt.Sprintf("The resource %v-%v-%v is expected Ready: %v but Ready is %v", resource.GetName(), resource.GetNamespace(), resource.GetKind(), ready, check.CheckReady())] = msg | ||
| } | ||
| } | ||
| allResources = append(allResources, resources...) | ||
| } | ||
| if allResources == nil { | ||
| return result.Failf("no resources found") | ||
| } | ||
| result.AddDetails(allResources) | ||
| if len(differentReadyStatus) > 0 { | ||
| message := "The following resources found with differednt ready status\n" | ||
| for key, value := range differentReadyStatus { | ||
| message += fmt.Sprintf("%v: %v\n", key, value) | ||
| } | ||
| return result.Failf(message) | ||
| } | ||
| return result | ||
| } | ||
|
|
||
| func getResourcesFromNamespace(ctx *context.Context, client dynamic.NamespaceableResourceInterface, check v1.KubernetesCheck, namespace string) ([]unstructured.Unstructured, error) { | ||
| var resources []unstructured.Unstructured | ||
| if check.Resource.Name != "" { | ||
| resource, err := client.Namespace(namespace).Get(ctx, check.Resource.Name, metav1.GetOptions{}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return []unstructured.Unstructured{*resource}, nil | ||
| } | ||
| resourceList, err := client.Namespace(namespace).List(ctx, metav1.ListOptions{ | ||
| LabelSelector: check.Resource.LabelSelector, | ||
| FieldSelector: check.Resource.FieldSelector, | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| resources = append(resources, resourceList.Items...) | ||
| return resources, nil | ||
| } | ||
|
|
||
| func getNamespaces(ctx *context.Context, check v1.KubernetesCheck) ([]string, error) { | ||
| var namespaces []string | ||
| if check.Namespace.Name != "" { | ||
| return []string{check.Namespace.Name}, nil | ||
| } | ||
| k8sClient, err := ctx.Kommons.GetClientset() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| namespeceList, err := k8sClient.CoreV1().Namespaces().List(ctx, metav1.ListOptions{ | ||
| LabelSelector: check.Namespace.LabelSelector, | ||
| FieldSelector: check.Namespace.FieldSelector, | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| for _, namespace := range namespeceList.Items { | ||
| namespaces = append(namespaces, namespace.Name) | ||
| } | ||
| return namespaces, nil | ||
| } |
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