Minimal Redis from Operator¶

Very much new workload inside OPenShift / OKD or Kubernetes using Redis as distributed cache or session storage.

To address this there's an operator (https://ot-container-kit.github.io/redis-operator/)

It's best to use a reald redis cluster. CPU and Memory usage is typically low:

• Top of 0.6 CPU, 0.7 Gig memory and 6 pods
• Average of 0.1 CPU and less than 0.1 Gig memory

All values for a 3 count stateful set.

If you're using 1 Gig storage PVC's you're ending with 6 Gig storage consumption ;-)

Install¶

• Install the Redis operator like it's mentioned in https://ot-container-kit.github.io/redis-operator/guide/installation.html

• or use the Operator Tab in OpenShift / OKD

• or apply this YAML in OpenShift / OKD:

apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
name: redis-operator
namespace: openshift-operators
spec:
channel: stable
installPlanApproval: Automatic
name: redis-operator
source: community-operators
sourceNamespace: openshift-marketplace
```

apiVersion: redis.redis.opstreelabs.in/v1beta1
kind: RedisCluster
metadata:
  name: redis-cluster
spec:
  clusterSize: 3
  kubernetesConfig:
    image: 'quay.io/opstree/redis:v6.2.5'
    imagePullPolicy: IfNotPresent
    resources:
      limits:
        cpu: 101m
        memory: 128Mi
      requests:
        cpu: 101m
        memory: 128Mi
    serviceType: ClusterIP
  redisExporter:
    enabled: false
    image: 'quay.io/opstree/redis-exporter:1.0'
  redisFollower:
    serviceType: ClusterIP
  redisLeader:
    serviceType: ClusterIP
  storage:
    volumeClaimTemplate:
      spec:
        accessModes:
          - ReadWriteOnce
        resources:
          requests:
            storage: 1Gi
        storageClassName: rook-ceph-block