Multiinstance

Portworx Storage for MultiInstance QueueManager's

Starting from CP4I 2020.3 Portworx Storage Version 2.5.5 is offically supported

However, for MultiInstance QueManager's where there is a requirment for Shared File Storage the default Portworx StorageClass will not be sufficient:

kind: StorageClass
metadata:
  labels:
    app.kubernetes.io/instance: portworx
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/name: portworx-portworx
    helm.sh/chart: portworx-1.0.21
  name: portworx-shared-sc
parameters:
  repl: "3"
  shared: "true"
provisioner: kubernetes.io/portworx-volume
reclaimPolicy: Delete
volumeBindingMode: Immediate

You must enable nfsv_4 to work with MultiInstance QM's like so:

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: portworx-shared-sc3
provisioner: kubernetes.io/portworx-volume
parameters:
  io_profile: db_remote
  nfs_v4: 'true'
  repl: '3'
  sharedv4: 'true'
reclaimPolicy: Delete
volumeBindingMode: Immediate

A major advantage of working with Portworx Storage is that it can replicate data across Availability Zones.

This means if you have a Multi AZ Cluster, Kubernetes will schedule the Active/Passive pod pair into different Zones and they can still share the same PVC's for failover since the PVC's backing the MultiInstance pods will be replicated across Availability Zones

Here is an example of how to use the Storage Class for MultiInstance:

apiVersion: mq.ibm.com/v1beta1
kind: QueueManager
metadata:
  name: miqm
  namespace: cp4i
spec:
  license:
    accept: true
    license: L-RJON-BN7PN3
    metric: ProcessorValueUnit
    use: NonProduction
  web:
    enabled: true
  version: 9.2.0.0-r2
  queueManager:
    metrics:
      enabled: true
    name: miqm
    availability:
      type: MultiInstance
    storage:
      persistedData:
        class: portworx-shared-sc3
        enabled: true
        type: persistent-claim
      queueManager:
        class: portworx-shared-sc3
        type: persistent-claim
      recoveryLogs:
        class: portworx-shared-sc3
        enabled: true
        type: persistent-claim

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