Deploy Multiple Aerospike Clusters on Kubernetes

The Aerospike Kubernetes Operator can deploy multiple Aerospike clusters within a single Kubernetes namespace, or in multiple namespaces.

Multiple Aerospike Clusters in a Single Namespace

You can deploy multiple clusters in a single namespace using the same process as deploying a single cluster. When you deploy another cluster, use a cluster name which is not already registered in that namespace as described by the cluster object metadata name in the CR YAML file.

RBAC for Other Namespaces

The procedure to use the namespace ns1 is as follows:

Create the namespace

Create the Kubernetes namespace if not already created:

kubectl create namespace ns1

Create a service account

kubectl -n ns1 create serviceaccount aerospike-operator-controller-manager

Update the operator's ClusterRoleBinding

Next, add this service account to the Operator's ClusterRoleBinding. To do this, run the following command:

kubectl edit clusterrolebindings.rbac.authorization.k8s.io $(kubectl get clusterrolebindings.rbac.authorization.k8s.io  | grep aerospike-kubernetes-operator | grep -v -- "-opera-" | grep -v -- "default-ns" | cut -f 1 -d " ")

This command launches an editor. Append the following lines to the subjects section:

  # A new entry for ns1.
  # Replace ns1 with your namespace
- kind: ServiceAccount
  name: aerospike-operator-controller-manager
  namespace: ns1

Save and ensure that the changes are applied.

Here is a full example of the Operator's ClusterRoleBinding targeting the ns1 namespace.

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  creationTimestamp: "2022-06-16T10:48:36Z"
  labels:
    olm.owner: aerospike-kubernetes-operator.v2.4.0
    olm.owner.kind: ClusterServiceVersion
    olm.owner.namespace: test
    operators.coreos.com/aerospike-kubernetes-operator.test: ""
  name: aerospike-kubernetes-operator.v2.4.0-74b946466d
  resourceVersion: "51841234"
  uid: be546dd5-b21e-4cc3-8a07-e2fe5fe5274c
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: aerospike-kubernetes-operator.v2.4.0-74b946466d
subjects:
  - kind: ServiceAccount
    name: aerospike-operator-controller-manager
    namespace: operators

  # New entry
  - kind: ServiceAccount
    name: aerospike-operator-controller-manager
    namespace: ns1