How to deploy Redis in Kubernetes with Helm chart + Redis commander

Last updated on April 23, 2023

Helm provides a quick way of setting up a Redis cluster using a pre-made Helm chart.

1. Add the Helm repository containing the Redis chart you wish to install.I will use for this tutorial bitnami repo.

helm repo add bitnami https://charts.bitnami.com/bitnami

2. Update local Helm repositories.

helm repo update

3. Use helm install to install the chart. The basic command is as follows:

helm install my-release bitnami/redis

4. Export the Redis password as an environment variable.

export REDIS_PASSWORD=$(kubectl get secret --namespace default redis-test -o jsonpath="{.data.redis-password}" | base64 --decode)

• You can check it then with echo $REDIS_PASSWORD

  That’s all, helm chart installed, but all pods are in Pending status?
  In my case there was no Persistent volumes created so I needed to create it manually.
  Create file pv.yaml and paste the content below:

  apiVersion: v1
  kind: PersistentVolume
  metadata:
  name: redis-data-redis-master0
  spec:
  capacity:
  storage: 8Gi
  accessModes:
  - ReadWriteOnce
  hostPath:
  path: "/storage/data-master0"
  
  ---
  apiVersion: v1
  kind: PersistentVolume
  metadata:
  name: redis-data-redis-replicas0
  spec:
  capacity:
  storage: 8Gi
  accessModes:
  - ReadWriteOnce
  hostPath:
  path: "/storage/data-replicas0"

  Now lets create persistent volume:

  kubectl apply -f pv.yaml

  Wait a bit and check if everything is working
  
  or with the command

  kubectl get pv

  

  **If you want to disable password authentication

  helm upgrade redis-1669709819 bitnami/redis --set auth.enabled=false

  As a bonus let’s deploy Redis commander

  
  redis commander is a redis web management tool written in node.js

  Create redis-commander.yaml file and paste the content below:

  ---
  apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: redis-commander
    annotations:
      container.apparmor.security.beta.kubernetes.io/redis-commander: runtime/default
      container.security.alpha.kubernetes.io/redis-commander: runtime/default
  spec:
    replicas: 1
    selector:
      matchLabels:
        app: redis-commander
    template:
      metadata:
        labels:
          app: redis-commander
          tier: backend
      spec:
        automountServiceAccountToken: false
        containers:
          - name: redis-commander
            image: rediscommander/redis-commander
            imagePullPolicy: Always
            env:
              - name: REDIS_HOST
                value: "redis-1669709819-master"
              - name: K8S_SIGTERM
                value: "1"
            ports:
              - name: redis-commander
                containerPort: 8081
            livenessProbe:
              httpGet:
                path: /favicon.png
                port: 8081
              initialDelaySeconds: 10
              timeoutSeconds: 5
            # adapt to your needs base on data stored inside redis (number of keys and size of biggest keys)
            # or comment out for less secure installation
            resources:
              limits:
                cpu: "500m"
                memory: "512M"
            securityContext:
              runAsNonRoot: true
              readOnlyRootFilesystem: false
              allowPrivilegeEscalation: false
              capabilities:
                drop:
                  - ALL
  ---
  apiVersion: v1
  kind: Service
  metadata:
    name: redis-commander
  spec:
    ports:
      - port: 8081
        targetPort: 8081
        name: redis-commander
        protocol: TCP
    selector:
      app: redis-commander
    type: LoadBalancer
  

  Now create deployment

kubectl apply -f redis-commander.yaml

Now you can access redis commander in web with http://localhost:8081