在 Azure Kubernetes 服务 (AKS) 上配置和部署 Valkey 群集

在本文中,在 Azure Kubernetes 服务 (AKS) 上配置和部署 Valkey 群集。

注意

本文包含对术语“主”和“从”的引用,Microsoft 不再使用这些术语。 在从 Valkey 软件中删除该术语后,我们会将其从本文中删除。

创建命名空间

  1. 使用 kubectl create namespace 命令为 Valkey 群集创建一个命名空间。

    kubectl create namespace ${SERVICE_ACCOUNT_NAMESPACE} --dry-run=client --output yaml | kubectl apply -f -
    

    示例输出:

    namespace/valkey created
    

创建机密

  1. 使用 OpenSSL 为 Valkey 群集生成随机密码,并使用 az keyvault secret set 命令将其存储在 Azure 密钥保管库中。 设置策略以允许用户分配的标识使用 az keyvault set-policy 命令获取机密。

    SECRET=$(openssl rand -base64 32)
    echo requirepass $SECRET > /tmp/valkey-password-file.conf
    echo primaryauth $SECRET >> /tmp/valkey-password-file.conf
    az keyvault secret set --vault-name $MY_KEYVAULT_NAME --name valkey-password-file --file /tmp/valkey-password-file.conf --output table
    rm /tmp/valkey-password-file.conf
    az keyvault set-policy --name $MY_KEYVAULT_NAME --object-id $userAssignedObjectID --secret-permissions get --output table
    
  2. 创建一个 SecretProviderClass 资源,以使用 kubectl apply 命令访问存储在密钥保管库中的 Valkey 密码。

    kubectl apply -f - <<EOF
    ---
    apiVersion: secrets-store.csi.x-k8s.io/v1
    kind: SecretProviderClass
    metadata:
      name: valkey-password
      namespace: valkey
    spec:
      provider: azure
      parameters:
        usePodIdentity: "false"
        useVMManagedIdentity: "true"
        userAssignedIdentityID: "${userAssignedIdentityID}"
        keyvaultName: ${MY_KEYVAULT_NAME}              # the name of the AKV instance
        objects: |
          array:
            - |
              objectName: valkey-password-file
              objectAlias: valkey-password-file.conf
              objectType: secret
        tenantId: "${TENANT_ID}" # the tenant ID of the AKV instance
    EOF
    

部署 Valkey 群集

  1. 在 Valkey StatefulSet 中创建一个装载为卷的 ConfigMap,用于使用 kubectl apply 命令配置 Valkey 群集。

    kubectl apply -f - <<EOF
    apiVersion: v1
    kind: ConfigMap
    metadata:
      name: valkey-cluster
      namespace: valkey
    data:
      valkey.conf:  |+
        cluster-enabled yes
        cluster-node-timeout 15000
        cluster-config-file /data/nodes.conf
        appendonly yes
        protected-mode yes
        dir /data
        port 6379
        include /etc/valkey-password/valkey-password-file.conf
    EOF
    

    示例输出:

    configmap/valkey-cluster created
    
  2. 使用 kubectl apply 命令创建一个 StatefulSet 资源,其 spec.affinity 目标是将所有主数据库保留在区域 1 和区域 2 中(最好在不同的节点中)。

    kubectl apply -f - <<EOF
    ---
    apiVersion: apps/v1
    kind: StatefulSet
    metadata:
      name: valkey-masters
      namespace: valkey
    spec:
      serviceName: "valkey-masters"
      replicas: 3
      selector:
        matchLabels:
          app: valkey
      template:
        metadata:
          labels:
            app: valkey
            appCluster: valkey-masters
        spec:
          terminationGracePeriodSeconds: 20
          affinity:
            nodeAffinity:
              requiredDuringSchedulingIgnoredDuringExecution:
                nodeSelectorTerms:
                - matchExpressions:
                  - key: agentpool
                    operator: In
                    values:
                    - valkey
                  - key: topology.kubernetes.io/zone
                    operator: In
                    values:
                    - ${MY_LOCATION}-1
                - matchExpressions:
                  - key: agentpool
                    operator: In
                    values:
                    - valkey
                  - key: topology.kubernetes.io/zone
                    operator: In
                    values:
                    - ${MY_LOCATION}-2
            podAntiAffinity:
              preferredDuringSchedulingIgnoredDuringExecution:
              - weight: 90
                podAffinityTerm:
                  labelSelector:
                    matchExpressions:
                    - key: app
                      operator: In
                      values:
                      - valkey
                  topologyKey: topology.kubernetes.io/zone
              - weight: 90
                podAffinityTerm:
                  labelSelector:
                    matchExpressions:
                    - key: app
                      operator: In
                      values:
                      - valkey
                  topologyKey: kubernetes.io/hostname
          containers:
          - name: valkey
            image: "${MY_ACR_REGISTRY}.azurecr.cn/valkey:latest"
            env:
            - name: VALKEY_PASSWORD_FILE
              value: "/etc/valkey-password/valkey-password-file.conf"
            - name: MY_POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
            command:
              - "valkey-server"
            args:
              - "/conf/valkey.conf"
              - "--cluster-announce-ip"
              - "\$(MY_POD_IP)"
            resources:
              requests:
                cpu: "100m"
                memory: "100Mi"
            ports:
                - name: valkey
                  containerPort: 6379
                  protocol: "TCP"
                - name: cluster
                  containerPort: 16379
                  protocol: "TCP"
            volumeMounts:
            - name: conf
              mountPath: /conf
              readOnly: false
            - name: data
              mountPath: /data
              readOnly: false
            - name: valkey-password
              mountPath: /etc/valkey-password
              readOnly: true
          volumes:
          - name: valkey-password
            csi:
              driver: secrets-store.csi.k8s.io
              readOnly: true
              volumeAttributes:
                secretProviderClass: valkey-password
          - name: conf
            configMap:
              name: valkey-cluster
              defaultMode: 0755
      volumeClaimTemplates:
      - metadata:
          name: data
        spec:
          accessModes: [ "ReadWriteOnce" ]
          storageClassName: managed-csi-premium
          resources:
            requests:
              storage: 20Gi
    EOF
    

    示例输出:

    statefulset.apps/valkey-masters created
    
  3. 使用 kubectl apply 命令为 Valkey 辅助数据库创建第二个 StatefulSet 资源,其 spec.affinity 目标是将所有副本保留在区域 3 中(最好在不同的节点中)。

    kubectl apply -f - <<EOF
    ---
    apiVersion: apps/v1
    kind: StatefulSet
    metadata:
      name: valkey-replicas
      namespace: valkey
    spec:
      serviceName: "valkey-replicas"
      replicas: 3
      selector:
        matchLabels:
          app: valkey
      template:
        metadata:
          labels:
            app: valkey
            appCluster: valkey-replicas
        spec:
          terminationGracePeriodSeconds: 20
          affinity:
            nodeAffinity:
              requiredDuringSchedulingIgnoredDuringExecution:
                nodeSelectorTerms:
                - matchExpressions:
                  - key: agentpool
                    operator: In
                    values:
                    - valkey
                  - key: topology.kubernetes.io/zone
                    operator: In
                    values:
                    - ${MY_LOCATION}-3
            podAntiAffinity:
              preferredDuringSchedulingIgnoredDuringExecution:
              - weight: 90
                podAffinityTerm:
                  labelSelector:
                    matchExpressions:
                    - key: app
                      operator: In
                      values:
                      - valkey
                  topologyKey: kubernetes.io/hostname
          containers:
          - name: valkey
            image: "${MY_ACR_REGISTRY}.azurecr.cn/valkey:latest"
            env:
            - name: VALKEY_PASSWORD_FILE
              value: "/etc/valkey-password/valkey-password-file.conf"
            - name: MY_POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
            command:
              - "valkey-server"
            args:
              - "/conf/valkey.conf"
              - "--cluster-announce-ip"
              - "\$(MY_POD_IP)"
            resources:
              requests:
                cpu: "100m"
                memory: "100Mi"
            ports:
                - name: valkey
                  containerPort: 6379
                  protocol: "TCP"
                - name: cluster
                  containerPort: 16379
                  protocol: "TCP"
            volumeMounts:
            - name: conf
              mountPath: /conf
              readOnly: false
            - name: data
              mountPath: /data
              readOnly: false
            - name: valkey-password
              mountPath: /etc/valkey-password
              readOnly: true
          volumes:
          - name: valkey-password
            csi:
              driver: secrets-store.csi.k8s.io
              readOnly: true
              volumeAttributes:
                secretProviderClass: valkey-password
          - name: conf
            configMap:
              name: valkey-cluster
              defaultMode: 0755
      volumeClaimTemplates:
      - metadata:
          name: data
        spec:
          accessModes: [ "ReadWriteOnce" ]
          storageClassName: managed-csi-premium
          resources:
            requests:
              storage: 20Gi
    EOF
    

    示例输出:

    statefulset.apps/valkey-replicas created
    
  4. 使用 kubectl get nodeskubectl get pods 命令验证 master-Nreplica-N 在不同的节点和区域中运行。

    kubectl get pods -n valkey -o wide
    kubectl get node -o custom-columns=Name:.metadata.name,Zone:".metadata.labels.topology\.kubernetes\.io/zone"
    

    示例输出:

    NAME                READY   STATUS    RESTARTS   AGE     IP             NODE                             NOMINATED NODE   READINESS GATES
    valkey-masters-0    1/1     Running   0          2m55s   10.224.0.4     aks-valkey-18693609-vmss000004   <none>           <none>
    valkey-masters-1    1/1     Running   0          2m31s   10.224.0.137   aks-valkey-18693609-vmss000000   <none>           <none>
    valkey-masters-2    1/1     Running   0          2m7s    10.224.0.222   aks-valkey-18693609-vmss000001   <none>           <none>
    valkey-replicas-0   1/1     Running   0          88s     10.224.0.237   aks-valkey-18693609-vmss000005   <none>           <none>
    valkey-replicas-1   1/1     Running   0          70s     10.224.0.18    aks-valkey-18693609-vmss000002   <none>           <none>
    valkey-replicas-2   1/1     Running   0          48s     10.224.0.242   aks-valkey-18693609-vmss000005   <none>           <none>
    Name                                Zone
    aks-nodepool1-17621399-vmss000000   chinanorth3-1
    aks-nodepool1-17621399-vmss000001   chinanorth3-2
    aks-nodepool1-17621399-vmss000003   chinanorth3-3
    aks-valkey-18693609-vmss000000      chinanorth3-1
    aks-valkey-18693609-vmss000001      chinanorth3-2
    aks-valkey-18693609-vmss000002      chinanorth3-3
    aks-valkey-18693609-vmss000003      chinanorth3-1
    aks-valkey-18693609-vmss000004      chinanorth3-2
    aks-valkey-18693609-vmss000005      chinanorth3-3
    

    在继续下一步之前,等待所有 Pod 都运行。

  5. 使用 kubectl apply 命令创建三个无外设 Service 资源(第一个用于整个群集,第二个用于主项,第三个用于辅助项),用于获取 Valkey Pod 的 IP 地址。

    kubectl apply -f - <<EOF
    apiVersion: v1
    kind: Service
    metadata:
      name: valkey-cluster
      namespace: valkey
    spec:
      clusterIP: None
      ports:
      - name: valkey-port
        port: 6379
        protocol: TCP
        targetPort: 6379
      selector:
        app: valkey
      sessionAffinity: None
      type: ClusterIP
    EOF
    
    kubectl apply -f - <<EOF
    apiVersion: v1
    kind: Service
    metadata:
      name: valkey-masters
      namespace: valkey
    spec:
      clusterIP: None
      ports:
      - name: valkey-port
        port: 6379
        protocol: TCP
        targetPort: 6379
      selector:
        app: valkey
        appCluster: valkey-masters
      sessionAffinity: None
      type: ClusterIP
    EOF
    
    kubectl apply -f - <<EOF
    apiVersion: v1
    kind: Service
    metadata:
      name: valkey-replicas
      namespace: valkey
    spec:
      clusterIP: None
      ports:
      - name: valkey-port
        port: 6379
        protocol: TCP
        targetPort: 6379
      selector:
        app: valkey
        appCluster: valkey-replicas
      sessionAffinity: None
      type: ClusterIP
    EOF
    

    示例输出:

    service/valkey-cluster created
    service/valkey-masters created
    service/valkey-replicas created
    

运行 Valkey 群集

  1. 使用 kubectl exec 命令将区域 1 和 2 中的 Valkey 主数据库添加到群集。

    kubectl exec -it -n valkey valkey-masters-0 -- valkey-cli --cluster create --cluster-yes --cluster-replicas 0 \
                        valkey-masters-0.valkey-masters.valkey.svc.cluster.local:6379 \
                        valkey-masters-1.valkey-masters.valkey.svc.cluster.local:6379 \
                        valkey-masters-2.valkey-masters.valkey.svc.cluster.local:6379 \
                        --pass ${SECRET}
    

    示例输出:

    >>> Performing hash slots allocation on 3 nodes...
    Master[0] -> Slots 0 - 5460
    Master[1] -> Slots 5461 - 10922
    Master[2] -> Slots 10923 - 16383
    M: ee6ac1d00d3f016b6f46c7ce11199bc1a7809a35 valkey-masters-0.valkey-masters.valkey.svc.cluster.local:6379
       slots:[0-5460] (5461 slots) master
    M: fd1fb98db83976478e05edd3d2a02f9a13badd80 valkey-masters-1.valkey-masters.valkey.svc.cluster.local:6379
       slots:[5461-10922] (5462 slots) master
    M: ea47bf57ae7080ef03164a4d48b662c7b4c8770e valkey-masters-2.valkey-masters.valkey.svc.cluster.local:6379
       slots:[10923-16383] (5461 slots) master
    >>> Nodes configuration updated
    >>> Assign a different config epoch to each node
    >>> Sending CLUSTER MEET messages to join the cluster
    Waiting for the cluster to join
    ...
    >>> Performing Cluster Check (using node valkey-masters-0.valkey-masters.valkey.svc.cluster.local:6379)
    M: ee6ac1d00d3f016b6f46c7ce11199bc1a7809a35 valkey-masters-0.valkey-masters.valkey.svc.cluster.local:6379
       slots:[0-5460] (5461 slots) master
    M: ea47bf57ae7080ef03164a4d48b662c7b4c8770e 10.224.0.176:6379
       slots:[10923-16383] (5461 slots) master
    M: fd1fb98db83976478e05edd3d2a02f9a13badd80 10.224.0.247:6379
       slots:[5461-10922] (5462 slots) master
    [OK] All nodes agree about slots configuration.
    >>> Check for open slots...
    >>> Check slots coverage...
    [OK] All 16384 slots covered.
    
  2. 使用 kubectl exec 命令将区域 3 中的 Valkey 副本添加到群集。

    kubectl exec -ti -n valkey valkey-masters-0 -- valkey-cli --cluster add-node \
                        valkey-replicas-0.valkey-replicas.valkey.svc.cluster.local:6379 \
                        valkey-masters-0.valkey-masters.valkey.svc.cluster.local:6379  --cluster-slave \
                        --pass ${SECRET}
    
    kubectl exec -ti -n valkey valkey-masters-0 -- valkey-cli --cluster add-node \
                        valkey-replicas-1.valkey-replicas.valkey.svc.cluster.local:6379 \
                        valkey-masters-1.valkey-masters.valkey.svc.cluster.local:6379  --cluster-slave \
                        --pass ${SECRET}
    
    kubectl exec -ti -n valkey valkey-masters-0 -- valkey-cli --cluster add-node \
                        valkey-replicas-2.valkey-replicas.valkey.svc.cluster.local:6379 \
                        valkey-masters-2.valkey-masters.valkey.svc.cluster.local:6379  --cluster-slave \
                        --pass ${SECRET}
    

    示例输出:

    >>> Adding node valkey-replicas-0.valkey-replicas.valkey.svc.cluster.local:6379 to cluster valkey-masters-0.valkey-masters.valkey.svc.cluster.local:6379
    >>> Performing Cluster Check (using node valkey-masters-0.valkey-masters.valkey.svc.cluster.local:6379)
    M: ee6ac1d00d3f016b6f46c7ce11199bc1a7809a35 valkey-masters-0.valkey-masters.valkey.svc.cluster.local:6379
       slots:[0-5460] (5461 slots) master
    M: ea47bf57ae7080ef03164a4d48b662c7b4c8770e 10.224.0.176:6379
       slots:[10923-16383] (5461 slots) master
    M: fd1fb98db83976478e05edd3d2a02f9a13badd80 10.224.0.247:6379
       slots:[5461-10922] (5462 slots) master
    [OK] All nodes agree about slots configuration.
    >>> Check for open slots...
    >>> Check slots coverage...
    [OK] All 16384 slots covered.
    Automatically selected master valkey-masters-0.valkey-masters.valkey.svc.cluster.local:6379
    >>> Send CLUSTER MEET to node valkey-replicas-0.valkey-replicas.valkey.svc.cluster.local:6379 to make it join the cluster.
    Waiting for the cluster to join
    
    >>> Configure node as replica of valkey-masters-0.valkey-masters.valkey.svc.cluster.local:6379.
    [OK] New node added correctly.
    >>> Adding node valkey-replicas-1.valkey-replicas.valkey.svc.cluster.local:6379 to cluster valkey-masters-1.valkey-masters.valkey.svc.cluster.local:6379
    >>> Performing Cluster Check (using node valkey-masters-1.valkey-masters.valkey.svc.cluster.local:6379)
    M: fd1fb98db83976478e05edd3d2a02f9a13badd80 valkey-masters-1.valkey-masters.valkey.svc.cluster.local:6379
       slots:[5461-10922] (5462 slots) master
    S: 0ebceb60cbcc31da9040159440a1f4856b992907 10.224.0.224:6379
       slots: (0 slots) slave
       replicates ee6ac1d00d3f016b6f46c7ce11199bc1a7809a35
    M: ea47bf57ae7080ef03164a4d48b662c7b4c8770e 10.224.0.176:6379
       slots:[10923-16383] (5461 slots) master
    M: ee6ac1d00d3f016b6f46c7ce11199bc1a7809a35 10.224.0.14:6379
       slots:[0-5460] (5461 slots) master
       1 additional replica(s)
    [OK] All nodes agree about slots configuration.
    >>> Check for open slots...
    >>> Check slots coverage...
    [OK] All 16384 slots covered.
    Automatically selected master valkey-masters-1.valkey-masters.valkey.svc.cluster.local:6379
    >>> Send CLUSTER MEET to node valkey-replicas-1.valkey-replicas.valkey.svc.cluster.local:6379 to make it join the cluster.
    Waiting for the cluster to join
    
    >>> Configure node as replica of valkey-masters-1.valkey-masters.valkey.svc.cluster.local:6379.
    [OK] New node added correctly.
    >>> Adding node valkey-replicas-2.valkey-replicas.valkey.svc.cluster.local:6379 to cluster valkey-masters-2.valkey-masters.valkey.svc.cluster.local:6379
    >>> Performing Cluster Check (using node valkey-masters-2.valkey-masters.valkey.svc.cluster.local:6379)
    M: ea47bf57ae7080ef03164a4d48b662c7b4c8770e valkey-masters-2.valkey-masters.valkey.svc.cluster.local:6379
       slots:[10923-16383] (5461 slots) master
    S: 0ebceb60cbcc31da9040159440a1f4856b992907 10.224.0.224:6379
       slots: (0 slots) slave
       replicates ee6ac1d00d3f016b6f46c7ce11199bc1a7809a35
    S: fa44edff683e2e01ee5c87233f9f3bc35c205dce 10.224.0.103:6379
       slots: (0 slots) slave
       replicates fd1fb98db83976478e05edd3d2a02f9a13badd80
    M: ee6ac1d00d3f016b6f46c7ce11199bc1a7809a35 10.224.0.14:6379
       slots:[0-5460] (5461 slots) master
       1 additional replica(s)
    M: fd1fb98db83976478e05edd3d2a02f9a13badd80 10.224.0.247:6379
       slots:[5461-10922] (5462 slots) master
       1 additional replica(s)
    [OK] All nodes agree about slots configuration.
    >>> Check for open slots...
    >>> Check slots coverage...
    [OK] All 16384 slots covered.
    Automatically selected master valkey-masters-2.valkey-masters.valkey.svc.cluster.local:6379
    >>> Send CLUSTER MEET to node valkey-replicas-2.valkey-replicas.valkey.svc.cluster.local:6379 to make it join the cluster.
    Waiting for the cluster to join
    
    >>> Configure node as replica of valkey-masters-2.valkey-masters.valkey.svc.cluster.local:6379.
    [OK] New node added correctly.
    
  3. 使用以下命令验证 Pod 的角色:

    for x in $(seq 0 2); do echo "valkey-masters-$x"; kubectl exec -n valkey valkey-masters-$x  -- valkey-cli --pass ${SECRET} role; echo; done
    for x in $(seq 0 2); do echo "valkey-replicas-$x"; kubectl exec -n valkey valkey-replicas-$x -- valkey-cli --pass ${SECRET} role; echo; done
    

    示例输出:

    valkey-masters-0
    master
    84
    10.224.0.224
    6379
    84
    
    valkey-masters-1
    master
    84
    10.224.0.103
    6379
    84
    
    valkey-masters-2
    master
    70
    10.224.0.200
    6379
    70
    
    valkey-replicas-0
    slave
    10.224.0.14
    6379
    connected
    98
    
    valkey-replicas-1
    slave
    10.224.0.247
    6379
    connected
    98
    
    valkey-replicas-2
    slave
    10.224.0.176
    6379
    connected
    84
    

后续步骤

若要详细了解如何在 Azure Kubernetes 服务 (AKS) 上部署开源软件,请参阅以下文章:

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  • Nelly Kiboi | 服务工程师
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