使用k8s手动部署rabbitmq集群

1 创建namespace

rabbitmq-cluster## All resources will be created in this namespace
## To delete all resources created by this example, simply delete this namespace:
## kubectl delete -f rabbitmq_statefulsets
apiVersion: v1
kind: Namespace
metadata:
  name: rabbitmq-cluster

2 配置configmap

apiVersion: v1
kind: ConfigMap
metadata:
  name: rabbitmq-config
  namespace: rabbitmq-cluster
data:
  enabled_plugins: |
      [rabbitmq_management,rabbitmq_peer_discovery_k8s].
  rabbitmq.conf: |
      ## 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
      ## 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
      ## This is just an example.
      ## This enables remote access for the default user with well known credentials.
      ## Consider deleting the default user and creating a separate user with a set of generated
      ## credentials instead.
      ## Learn more at https://www.rabbitmq.com/access-control.html#loopback-users
      loopback_users.guest = false

3 rbac创建

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: rabbitmq
  namespace: test-rabbitmq
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: rabbitmq-peer-discovery-rbac
  namespace: test-rabbitmq
rules:
- apiGroups: [""]
  resources: ["endpoints"]
  verbs: ["get"]
- apiGroups: [""]
  resources: ["events"]
  verbs: ["create"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: rabbitmq-peer-discovery-rbac
  namespace: test-rabbitmq
subjects:
- kind: ServiceAccount
  name: rabbitmq
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: rabbitmq-peer-discovery-rbac

4 创建service

kind: Service
apiVersion: v1
metadata:
  namespace: test-rabbitmq
  name: rabbitmq
  labels:
    app: rabbitmq
    type: LoadBalancer
spec:
  type: NodePort
  ports:
   - name: http
     protocol: TCP
     port: 15672
     targetPort: 15672
     nodePort: 31672
   - name: amqp
     protocol: TCP
     port: 5672
     targetPort: 5672
     nodePort: 30672
  selector:
    app: rabbitmq

5 创建statefulset

apiVersion: apps/v1
# See the Prerequisites section of https://www.rabbitmq.com/cluster-formation.html#peer-discovery-k8s.
kind: StatefulSet
metadata:
  name: rabbitmq
  namespace: rabbitmq-cluster
spec:
  serviceName: rabbitmq
  # Three nodes is the recommended minimum. Some features may require a majority of nodes
  # to be available.
  replicas: 3
  selector:
    matchLabels:
      app: rabbitmq
  template:
    metadata:
      labels:
        app: rabbitmq
    spec:
      serviceAccountName: rabbitmq
      terminationGracePeriodSeconds: 10
      nodeSelector:
        # Use Linux nodes in a mixed OS kubernetes cluster.
        # Learn more at https://kubernetes.io/docs/reference/kubernetes-api/labels-annotations-taints/#kubernetes-io-os
        kubernetes.io/os: linux
      containers:
      - name: rabbitmq-k8s
        image: rabbitmq:3.8
        volumeMounts:
          - name: config-volume
            mountPath: /etc/rabbitmq
        # Learn more about what ports various protocols use
        # at https://www.rabbitmq.com/networking.html#ports
        ports:
          - name: http
            protocol: TCP
            containerPort: 15672
          - name: amqp
            protocol: TCP
            containerPort: 5672
        livenessProbe:
          exec:
            # This is just an example. There is no "one true health check" but rather
            # several rabbitmq-diagnostics commands that can be combined to form increasingly comprehensive
            # and intrusive health checks.
            # Learn more at https://www.rabbitmq.com/monitoring.html#health-checks.
            #
            # Stage 2 check:
            command: ["rabbitmq-diagnostics", "status"]
          initialDelaySeconds: 60
          # See https://www.rabbitmq.com/monitoring.html for monitoring frequency recommendations.
          periodSeconds: 60
          timeoutSeconds: 15
        readinessProbe:
          exec:
            # This is just an example. There is no "one true health check" but rather
            # several rabbitmq-diagnostics commands that can be combined to form increasingly comprehensive
            # and intrusive health checks.
            # Learn more at https://www.rabbitmq.com/monitoring.html#health-checks.
            #
            # Stage 1 check:
            command: ["rabbitmq-diagnostics", "ping"]
          initialDelaySeconds: 20
          periodSeconds: 60
          timeoutSeconds: 10
        imagePullPolicy: Always
        env:
          - name: MY_POD_NAME
            valueFrom:
              fieldRef:
                apiVersion: v1
                fieldPath: metadata.name
          - name: MY_POD_NAMESPACE
            valueFrom:
              fieldRef:
                fieldPath: metadata.namespace
          - name: RABBITMQ_USE_LONGNAME
            value: "true"
          # See a note on cluster_formation.k8s.address_type in the config file section
          - name: K8S_SERVICE_NAME
            value: rabbitmq
          - name: RABBITMQ_NODENAME
            value: rabbit@$(MY_POD_NAME).$(K8S_SERVICE_NAME).$(MY_POD_NAMESPACE).svc.cluster.local
          - name: K8S_HOSTNAME_SUFFIX
            value: .$(K8S_SERVICE_NAME).$(MY_POD_NAMESPACE).svc.cluster.local
          - name: RABBITMQ_ERLANG_COOKIE
            value: "mycookie"
      volumes:
        - name: config-volume
          configMap:
            name: rabbitmq-config
            items:
            - key: rabbitmq.conf
              path: rabbitmq.conf
            - key: enabled_plugins
              path: enabled_plugins

更多配置：

https://hub.docker.com/_/rabbitmq

https://github.com/rabbitmq/diy-kubernetes-examples

官方推荐方案：

https://www.rabbitmq.com/kubernetes/operator/operator-overview.html