injector.yaml

---
apiVersion: v1
kind: Namespace
metadata:
  name: service-mesh

---
apiVersion: "v1"
kind: ServiceAccount
metadata:
  name: service-mesh-injector
  namespace: service-mesh
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: service-mesh-admission
  namespace: service-mesh
rules:
- apiGroups: [""]
  resources: ["secrets"]
  verbs: ["get", "create"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: service-mesh-admission
  namespace: service-mesh
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: service-mesh-admission
subjects:
- kind: ServiceAccount
  name: service-mesh-injector
  namespace: service-mesh
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: service-mesh-admission
rules:
- apiGroups: ["admissionregistration.k8s.io"]
  resources: ["mutatingwebhookconfigurations"]
  verbs: ["get", "update"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: service-mesh-admission
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: service-mesh-admission
subjects:
- kind: ServiceAccount
  name: service-mesh-injector
  namespace: service-mesh
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: service-mesh-injector
  namespace: service-mesh
spec:
  replicas: 2
  selector:
    matchLabels:
      app: service-mesh-injector
  template:
    metadata:
      labels:
        app: service-mesh-injector
    spec:
      containers:
      - name: service-mesh-injector
        image: diy-sm-injector
        imagePullPolicy: IfNotPresent
        env:
        - name: TLS_CERT_FILE
          value: /certs/tls.crt
        - name: TLS_KEY_FILE
          value: /certs/tls.key
        # will be replaced by tilt
        - name: IMAGE_TO_DEPLOY_PROXY
          value: diy-sm-proxy:latest
        # will be replaced by tilt
        - name: IMAGE_TO_DEPLOY_PROXY_INIT
          value: diy-sm-proxy-init:latest
        ports:
        - containerPort: 8443
        volumeMounts:
        - name: webhook-certs
          mountPath: /certs
          readOnly: true
        securityContext:
          allowPrivilegeEscalation: false
          capabilities:
            drop:
            - ALL
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          runAsUser: 65532
          seccompProfile:
            type: RuntimeDefault
      volumes:
      - name: webhook-certs
        secret:
          secretName: service-mesh-injector-certs
---
apiVersion: v1
kind: Service
metadata:
  name: service-mesh-injector
  namespace: service-mesh
spec:
  ports:
  - port: 443
    targetPort: 8443
  selector:
    app: service-mesh-injector
---
apiVersion: batch/v1
kind: Job
metadata:
  name: injector-admission-create
  namespace: service-mesh
spec:
  template:
    metadata:
      name: injector-admission-create
    spec:
      containers:
      - args:
        - create
        - --host=service-mesh-injector,service-mesh-injector.$(POD_NAMESPACE).svc
        - --namespace=$(POD_NAMESPACE)
        - --secret-name=service-mesh-injector-certs
        - --cert-name=tls.crt
        - --key-name=tls.key
        env:
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        image: registry.k8s.io/ingress-nginx/kube-webhook-certgen:v1.4.1@sha256:36d05b4077fb8e3d13663702fa337f124675ba8667cbd949c03a8e8ea6fa4366
        imagePullPolicy: IfNotPresent
        name: create
        securityContext:
          allowPrivilegeEscalation: false
          capabilities:
            drop:
            - ALL
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          runAsUser: 65532
          seccompProfile:
            type: RuntimeDefault
      restartPolicy: OnFailure
      serviceAccountName: service-mesh-injector
---
apiVersion: batch/v1
kind: Job
metadata:
  name: injector-admission-patch
  namespace: service-mesh
spec:
  template:
    metadata:
      name: injector-admission-patch
    spec:
      containers:
      - args:
        - patch
        - --webhook-name=service-mesh-injector-webhook
        - --namespace=$(POD_NAMESPACE)
        - --patch-validating=false
        - --patch-mutating=true
        - --secret-name=service-mesh-injector-certs
        - --patch-failure-policy=Fail
        env:
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        image: registry.k8s.io/ingress-nginx/kube-webhook-certgen:v1.4.1@sha256:36d05b4077fb8e3d13663702fa337f124675ba8667cbd949c03a8e8ea6fa4366
        imagePullPolicy: IfNotPresent
        name: patch
        securityContext:
          allowPrivilegeEscalation: false
          capabilities:
            drop:
            - ALL
          readOnlyRootFilesystem: true
          runAsNonRoot: true
          runAsUser: 65532
          seccompProfile:
            type: RuntimeDefault
      restartPolicy: OnFailure
      serviceAccountName: service-mesh-injector
---
apiVersion: admissionregistration.k8s.io/v1
kind: MutatingWebhookConfiguration
metadata:
  name: service-mesh-injector-webhook
webhooks:
- name: service-mesh-injector.service-mesh.svc
  clientConfig:
    service:
      name: service-mesh-injector
      namespace: service-mesh
      path: "/inject"
  rules:
  - operations: ["CREATE"]
    apiGroups: [""]
    apiVersions: ["v1"]
    resources: ["pods"]
  admissionReviewVersions: ["v1"]
  sideEffects: None
  timeoutSeconds: 5