redis-cluster

prepare

1. k8s is ready
2. argocd is ready and logged in

installation

1. prepare redis-cluster.yaml

   • apiVersion: argoproj.io/v1alpha1
     kind: Application
     metadata:
       name: redis-cluster
     spec:
       syncPolicy:
         syncOptions:
         - CreateNamespace=true
       project: default
       source:
         repoURL: https://charts.bitnami.com/bitnami
         chart: redis-cluster
         targetRevision: 9.6.1
         helm:
           releaseName: redis-cluster
           values: |
             architecture: replication
             usePassword: true
             existingSecret: redis-cluster-credentials
             existingSecretPasswordKey: redis-password
             cluster:
               init: true
               nodes: 6
               replica: 1
               update:
                 addNodes: false
                 currentNumberOfNodes: 6
                 currentNumberOfReplicas: 1
             image:
               registry: docker.io
               pullPolicy: IfNotPresent
             metrics:
               enabled: false
               image:
                 registry: docker.io
                 pullPolicy: IfNotPresent
             volumePermissions:
               enabled: false
               image:
                 registry: docker.io
                 pullPolicy: IfNotPresent
             sysctlImage:
               enabled: false
               registry: docker.io
               pullPolicy: IfNotPresent
             persistence:
               enabled: false
       destination:
         server: https://kubernetes.default.svc
         namespace: database
     
     

2. prepare credentials secret

   • kubectl get namespaces database > /dev/null 2>&1 || kubectl create namespace database
     kubectl -n database create secret generic redis-cluster-credentials \
         --from-literal=redis-password=$(tr -dc A-Za-z0-9 </dev/urandom | head -c 16)
     

3. apply to k8s

   • kubectl -n argocd apply -f redis-cluster.yaml
     

4. sync by argocd

   • argocd app sync argocd/redis-cluster
     

tests

1. prepare redis-cluster-tool.yaml

   • apiVersion: apps/v1
     kind: Deployment
     metadata:
       name: redis-cluster-tool
       labels:
         app.kubernetes.io/name: redis-cluster-tool
     spec:
       replicas: 1
       selector:
         matchLabels:
           app.kubernetes.io/name: redis-cluster-tool
       template:
         metadata:
           labels:
             app.kubernetes.io/name: redis-cluster-tool
         spec:
           containers:
           - name: redis-cluster-tool
             image: docker.io/bitnami/redis:7.2.4-debian-12-r8
             imagePullPolicy: IfNotPresent
             env:
             - name: REDISCLI_AUTH
               valueFrom:
                 secretKeyRef:
                   key: redis-password
                   name: redis-cluster-credentials
             - name: TZ
               value: Asia/Shanghai
             command:
             - tail
             - -f
             - /etc/hosts
     
     

2. apply to k8s

   • kubectl -n database apply -f redis-cluster-tool.yaml
     

3. tests

   • kubectl -n database exec -it deployment/redis-cluster-tool -- \
         redis-cli -h redis-cluster.database ping
     

   • kubectl -n database exec -it deployment/redis-cluster-tool -- \
         redis-cli -c -h redis-cluster.database set mykey somevalue
     

   • kubectl -n database exec -it deployment/redis-cluster-tool -- \
         redis-cli -c -h redis-cluster.database get mykey
     

   • kubectl -n database exec -it deployment/redis-cluster-tool -- \
         redis-cli -c -h redis-cluster.database del mykey
     

   •  kubectl -n database exec -it deployment/redis-cluster-tool -- \
          redis-cli -c -h redis-cluster.database get mykey