Multiple Aerospike Clusters

The operator is able to deploy multiple Aerospike clusters within a single k8s namespace or in multiple k8s namespaces. The operator can watch all the namespaces specified in its yaml file and reconcile clusters deployed in them.

Multiple Aerospike clusters in a single k8s namespace

Deploying multiple clusters in a single namespace is as easy as deploying a single cluster. The user has to just deploy another cluster with a cluster name (cluster object metadata name in cr.yaml file) that is not already registered in that namespace.

Multiple Aerospike clusters in multiple k8s namespaces

Deploying multiple clusters in multiple namespaces require few steps to be followed

Step 1

Add a list of namespaces to be watched by Operator in operator.yaml file.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: aerospike-kubernetes-operator
  namespace: aerospike
spec:
    .
    .
    spec:
      containers:
        .
        .
        - name: aerospike-kubernetes-operator
          env:
          - name: WATCH_NAMESPACE
            # Use below value for watching multiple namespaces by the operator
            value: aerospike,aerospike1,aerospike2

Step 2

Add a new Service account and a new entry for this Service account in ClusterRoleBinding for every namespace to be watched in rbac.yaml file.

---
# Service account used by the cluster pods to obtain pod metadata.
apiVersion: v1
kind: ServiceAccount
metadata:
  # Do not change the name, its hard-coded in the operator
  name: aerospike-cluster
  namespace: aerospike

# Uncomment below service accounts for deploying clusters in additional namespaces
---
# Service account used by the cluster pods to obtain pod metadata.
apiVersion: v1
kind: ServiceAccount
metadata:
  # Do not change name, its hard-coded in operator
  name: aerospike-cluster
  namespace: aerospike1

---
# Role
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: aerospike-cluster
rules:
- apiGroups:
  - ""
  resources:
  - nodes
  - services
  verbs:
  - get
  - list
- apiGroups:
  - aerospike.com
  resources:
  - '*'
  verbs:
  - '*'

---
# RoleBinding
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: aerospike-cluster
roleRef:
  kind: ClusterRole
  name: aerospike-cluster
  apiGroup: rbac.authorization.k8s.io
subjects:
- kind: ServiceAccount
  name: aerospike-cluster
  namespace: aerospike
- kind: ServiceAccount
  name: aerospike-cluster
  namespace: aerospike1

Step 3

Now deploy a new cluster in any of the watched namespaces using a cr.yaml file.

XDR setup using Multicluster feature

Deploy XDR destination cluster using this cr.yaml.

kubectl apply -f deploy/samples/xdr_dst_cluster_cr.yaml

Deploy XDR source cluster using this cr.yaml.

kubectl apply -f deploy/samples/xdr_src_cluster_cr.yaml

Here Source and Destination clusters are deployed in a single namespace. If the user wants to deploy these clusters in different namespaces then the user has to follow these steps.