k8s 1.28 搭建rabbitmq集群

1.环境

        1.1 k8s 1.28

        1.2 rabbit 3.8

        1.3 工作空间default

        1.4 注意，内存最好充足一点，因为我就两个节点一个master、一个node，起初我的node是8g，还剩3~4G，集群竟然一直起不来，后来将虚拟机内存扩大，并重启，rabbit集群就起来了，当然可能是和重启有关，但是我认为还是因为内存不够了。

        1.5 k8s集成nfs存储，并且sc的名称 managed-nfs-storage。        

        1.6 镜像 docker pull registry.cn-beijing.aliyuncs.com/dotbalo/rabbitmq:3.8

2.准备yaml

        2.1 01-rabbitmq-configmap.yaml

        注：图中这个cluster_formation.k8s.host 我一开始用的是kubernetes.default.svc.cluster.local，然后就是各种连不上，后来换上 kubernetes.default.svc就可以了，不知道是不是k8s新版本的问题。 

kind: ConfigMap
apiVersion: v1
metadata:
  name: rabbitmq-cluster-config
  namespace: default
  labels:
    addonmanager.kubernetes.io/mode: Reconcile
data:
    enabled_plugins: |
      [rabbitmq_management,rabbitmq_peer_discovery_k8s].
    rabbitmq.conf: |
      default_user = admin
      default_pass = 123!@#
      ## Cluster formation. See https://www.rabbitmq.com/cluster-formation.html to learn more.
      cluster_formation.peer_discovery_backend = rabbit_peer_discovery_k8s
      #cluster_formation.k8s.host = kubernetes.default.svc.cluster.local
      cluster_formation.k8s.host = kubernetes.default.svc
      ## Should RabbitMQ node name be computed from the pod's hostname or IP address?
      ## IP addresses are not stable, so using [stable] hostnames is recommended when possible.
      ## Set to "hostname" to use pod hostnames.
      ## When this value is changed, so should the variable used to set the RABBITMQ_NODENAME
      ## environment variable.
      cluster_formation.k8s.address_type = hostname
      ## How often should node cleanup checks run?
      cluster_formation.node_cleanup.interval = 30
      ## Set to false if automatic removal of unknown/absent nodes
      ## is desired. This can be dangerous, see
      ##  * https://www.rabbitmq.com/cluster-formation.html#node-health-checks-and-cleanup
      ##  * https://groups.google.com/forum/#!msg/rabbitmq-users/wuOfzEywHXo/k8z_HWIkBgAJ
      cluster_formation.node_cleanup.only_log_warning = true
      cluster_partition_handling = autoheal
      ## See https://www.rabbitmq.com/ha.html#master-migration-data-locality
      queue_master_locator=min-masters
      ## See https://www.rabbitmq.com/access-control.html#loopback-users
      loopback_users.guest = false
      cluster_formation.randomized_startup_delay_range.min = 0
      cluster_formation.randomized_startup_delay_range.max = 2
      # default is rabbitmq-cluster's namespace
      # hostname_suffix
      cluster_formation.k8s.hostname_suffix = .rabbitmq-cluster.default.svc.cluster.local
      # memory
      vm_memory_high_watermark.absolute = 100MB
      # disk
      disk_free_limit.absolute = 2GB

        2.2 02-rabbitmq-service.yaml

kind: Service
apiVersion: v1
metadata:
  labels:
    app: rabbitmq-cluster
  name: rabbitmq-cluster
  namespace: default
spec:
  clusterIP: None
  ports:
  - name: rmqport
    port: 5672
    targetPort: 5672
  selector:
    app: rabbitmq-cluster

---
kind: Service
apiVersion: v1
metadata:
  labels:
    app: rabbitmq-cluster
  name: rabbitmq-cluster-manage
  namespace: default
spec:
  ports:
  - name: http
    port: 15672
    protocol: TCP
    targetPort: 15672
  selector:
    app: rabbitmq-cluster
  type: NodePort

        2.3 03-rabbitmq-rbac.yaml

kind: Service
apiVersion: v1
metadata:
  labels:
    app: rabbitmq-cluster
  name: rabbitmq-cluster
  namespace: default
spec:
  clusterIP: None
  ports:
  - name: rmqport
    port: 5672
    targetPort: 5672
  selector:
    app: rabbitmq-cluster

---
kind: Service
apiVersion: v1
metadata:
  labels:
    app: rabbitmq-cluster
  name: rabbitmq-cluster-manage
  namespace: default
spec:
  ports:
  - name: http
    port: 15672
    protocol: TCP
    targetPort: 15672
  selector:
    app: rabbitmq-cluster
  type: NodePort
[root@master rabbitmq]# cat 03-rabbitmq-rbac.yaml 
apiVersion: v1
kind: ServiceAccount
metadata:
  name: rabbitmq-cluster
  namespace: default
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rabbitmq-cluster
  namespace: default
rules:
- apiGroups: [""]
  resources: ["endpoints"]
  verbs: ["get"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rabbitmq-cluster
  namespace: default
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: rabbitmq-cluster
subjects:
- kind: ServiceAccount
  name: rabbitmq-cluster
  namespace: default

        2.4 04-rabbitmq-cluster-sts.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: rabbitmq-cluster
  namespace: default
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rabbitmq-cluster
  namespace: default
rules:
- apiGroups: [""]
  resources: ["endpoints"]
  verbs: ["get"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rabbitmq-cluster
  namespace: default
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: rabbitmq-cluster
subjects:
- kind: ServiceAccount
  name: rabbitmq-cluster
  namespace: default
[root@master rabbitmq]# cat 04-rabbitmq-cluster-sts.yaml
kind: StatefulSet
apiVersion: apps/v1
metadata:
  labels:
    app: rabbitmq-cluster
  name: rabbitmq-cluster
  namespace: default
spec:
  replicas: 3
  selector:
    matchLabels:
      app: rabbitmq-cluster
  serviceName: rabbitmq-cluster
  template:
    metadata:
      labels:
        app: rabbitmq-cluster
    spec:
      containers:
      - args:
        - -c
        - cp -v /etc/rabbitmq/rabbitmq.conf ${RABBITMQ_CONFIG_FILE}; exec docker-entrypoint.sh
          rabbitmq-server
        command:
        - sh
        env:
        - name: TZ
          value: 'Asia/Shanghai'
        - name: RABBITMQ_ERLANG_COOKIE
          value: 'SWvCP0Hrqv43NG7GybHC95ntCJKoW8UyNFWnBEWG8TY='
        - name: K8S_SERVICE_NAME
          value: rabbitmq-cluster
        - name: POD_IP
          valueFrom:
            fieldRef:
              fieldPath: status.podIP
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        - name: RABBITMQ_USE_LONGNAME
          value: "true"
        - name: RABBITMQ_NODENAME
          value: rabbit@$(POD_NAME).$(K8S_SERVICE_NAME).$(POD_NAMESPACE).svc.cluster.local
        - name: RABBITMQ_CONFIG_FILE
          value: /var/lib/rabbitmq/rabbitmq.conf
        image: 192.168.2.73:80/library/rabbitmq:3.8
        imagePullPolicy: IfNotPresent
        livenessProbe:
          exec:
            command:
            - rabbitmq-diagnostics
            - status
          # See https://www.rabbitmq.com/monitoring.html for monitoring frequency recommendations.
          initialDelaySeconds: 60
          periodSeconds: 60
          timeoutSeconds: 15
        name: rabbitmq
        ports:
        - containerPort: 15672
          name: http
          protocol: TCP
        - containerPort: 5672
          name: amqp
          protocol: TCP
        readinessProbe:
          exec:
            command:
            - rabbitmq-diagnostics
            - status
          initialDelaySeconds: 20
          periodSeconds: 60
          timeoutSeconds: 10
        volumeMounts:
        - mountPath: /etc/rabbitmq
          name: config-volume
          readOnly: false
        - mountPath: /var/lib/rabbitmq
          name: rabbitmq-storage
          readOnly: false
        - name: timezone
          mountPath: /etc/localtime
          readOnly: true
      serviceAccountName: rabbitmq-cluster
      terminationGracePeriodSeconds: 30
      volumes:
      - name: config-volume
        configMap:
          items:
          - key: rabbitmq.conf
            path: rabbitmq.conf
          - key: enabled_plugins
            path: enabled_plugins
          name: rabbitmq-cluster-config
      - name: timezone
        hostPath:
          path: /usr/share/zoneinfo/Asia/Shanghai
  volumeClaimTemplates:
  - metadata:
      name: rabbitmq-storage
    spec:
      accessModes:
      - ReadWriteMany
      storageClassName: "managed-nfs-storage"
      resources:
        requests:
          storage: 2Gi

        以上就是搭建rabbitmq集群需要的yaml文件

3 执行yaml

        3.1 执行命令

        kubectl apply -f .

        3.2 查看集群状态

        启动可能有点慢，需要一点时间去等待，大概几分钟吧三个节点就可以启动了

                 3.3 进入集群，查看状态

        执行 kubectl exec -it rabbitmq-cluster-0 -- /bin/bash

        执行 rabbitmqctl cluster_status

        可以看到，几点都已经进来了。

4. 浏览器访问rabbitmq客户端

        4.1 查看端口

        执行 kubectl get pvc

                4.2 输入在 01-rabbitmq-configmap.yaml 中配置的用户名和密码，进行登录

        注：我遇到了一个问题，就是当我输入我在 01-rabbitmq-configmap.yaml 中配置的用户名和密码时，检验没有通过，并提示这个，初步怀疑用户没起作用。

解决方案：

        1. 执行 kubectl exec -it rabbitmq-cluster-0 -- /bin/bash

        2.新增用户 rabbitmqctl add_user ldy(用户名) 123456（密码）

        3.设置权限 rabbitmqctl set_user_tags ldy administrator

        4.重新在浏览器用新的账户和密码登录就可以了