image Redis with StorageOS

Redis is a popular networked, in-memory, key-value data store with optional durability to disk.

Before you start, ensure you have StorageOS installed and ready on a Kubernetes cluster. See our guide on how to install StorageOS on Kubernetes for more information

Deploying Redis on Kubernetes

  1. You can find the latest files in the StorageOS example deployment repostiory
    git clone https://github.com/storageos/deploy.git storageos
    

    StatefulSet defintion

    kind: StatefulSet
    metadata:
     name: redis
    spec:
     selector:
    matchLabels:
      app: redis
      env: prod
     serviceName: redis
     replicas: 1
     ...
     spec:
      serviceAccountName: redis
       ...
       volumeMounts:
        - name: data
          mountPath: /bitnami/redis/data
    ...
    volumeClaimTemplates:
     - metadata:
      name: data
      labels:
        env: prod
    spec:
      accessModes: ["ReadWriteOnce"]
      storageClassName: "fast" # StorageOS storageClass 
      resources:
        requests:
          storage: 5Gi
    

    This excerpt is from the StatefulSet definition. This file contains the VolumeClaim template that will dynamically provision storage, using the StorageOS storage class. Dynamic provisioning occurs as a volumeMount has been declared with the same name as a Volume Claim.

  2. Move into the Redis examples folder and create the objects

    cd storageos
    kubectl create -f ./k8s/examples/redis
    
  3. Confirm Redis is up and running.

    $ kubectl get pods -w -l app=redis
    NAME        READY    STATUS    RESTARTS    AGE
    redis-0     1/1      Running    0          1m
    
  4. Connect to the Redis client pod and connect to the Redis server through the service
     $ kubectl exec -it redis-0 -- redis-cli -a password
     Warning: Using a password with '-a' option on the command line interface may not be safe.
     127.0.0.1:6379> CONFIG GET maxmemory
     1) "maxmemory"
     2) "0"
    

Configuration

If you need custom startup options, you can edit the ConfigMap file (15-redis-configmap.yaml) with your desired Redis configuration settings.