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User-defined Kubernetes service account configuration

This topic tells you how to configure a user-defined Kubernetes service account.

Overview

To configure a Kubernetes service account authentication for AMR Observer, CloudEvent Handler or GraphQL clients must have the required permissions, resources, and groups in the following sections.

Clients to CloudEvent Handler

Clients to the CloudEvent Handler, such as Observer, must have the permission update, resource *, and group cloudevents.amr.apps.tanzu.vmware.com. resourceNames are not supported. That translates to write for all resources for the CloudEvents API.

For example:

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: tanzu:amr:observer:editor
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: tanzu:amr:observer:edit
subjects:
  - kind: ServiceAccount
    name: amr-observer-editor
    namespace: amr-observer-system

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: tanzu:amr:observer:edit
rules:
  - apiGroups: ["cloudevents.amr.apps.tanzu.vmware.com"]
    resources: ["*"]
    verbs: ["update"]

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: amr-observer-editor
  namespace: amr-observer-system
  annotations:
automountServiceAccountToken: false

---
apiVersion: v1
kind: Secret
type: kubernetes.io/service-account-token
metadata:
  name: amr-observer-editor-token
  namespace: amr-observer-system
  annotations:
    kubernetes.io/service-account.name: amr-observer

If you saved this to a observer-rbac.yaml file, run kubectl apply -f observer-rbac.yaml to set everything up. If you prefer short lived service account tokens, remove the secret from the file beforehand. After creating the resources, run kubectl create token amr-observer-editor-token -n amr-observer-system to create a token.

To configure custom service accounts even if automatic configuration is on, you must edit the resource naming.

Clients to GraphQL

Clients to the AMR GraphQL interface must have the permission get, resource *, and group graphql.amr.apps.tanzu.vmware.com. resourceNames are not supported. That translates to "get for all resources for the GraphQL API".

For example:

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: tanzu:amr:graphql:viewer
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: tanzu:amr:graphql:view
subjects:
  - kind: ServiceAccount
    name: amr-graphql-viewer
    namespace: metadata-store
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: tanzu:amr:graphql:view
rules:
  - apiGroups: ["graphql.amr.apps.tanzu.vmware.com"]
    resources: ["*"]
    verbs: ["get"]
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: amr-graphql-viewer
  namespace: metadata-store
  annotations:
    kapp.k14s.io/change-group: amr-graphql-viewer.metadata-store.apps.tanzu.vmware.com/service-account
automountServiceAccountToken: false
---
apiVersion: v1
kind: Secret
type: kubernetes.io/service-account-token
metadata:
  name: amr-graphql-view-token
  namespace: metadata-store
  annotations:
    kubernetes.io/service-account.name: amr-graphql-viewer

If you saved this to a graphql-client-rbac.yaml file, run kubectl apply -f graphql-client-rbac.yaml to set everything up. If you prefer short lived service account tokens, remove the secret from the file beforehand. After creating the resources, run kubectl create token amr-graphql-view-token -n metadata-store to create a token.

To configure custom service accounts even if automatic configuration is on, you must edit the resource naming.