无法使用RabbitMQ cluster Kubernetes运算符创建RabbitMQ实例

Question

我试图使用RabbitMQ cluster Kubernetes操作符创建一个RabbitMQ实例，但是PersistentVolumeClaims存在一个问题。我正在使用Docker Desktop for Windows运行Kubernetes 1.18.8。

kubectl apply -f "https://github.com/rabbitmq/cluster-operator/releases/latest/download/cluster-operator.yml"

apiVersion: rabbitmq.com/v1beta1
kind: RabbitmqCluster
metadata:
  name: nccrabbitmqcluster

$ kubectl get all | grep rabbit
pod/nccrabbitmqcluster-server-0         0/1     Pending   0          14m
service/nccrabbitmqcluster                  ClusterIP      10.100.186.115   <none>        5672/TCP,15672/TCP   14m
service/nccrabbitmqcluster-nodes            ClusterIP      None             <none>        4369/TCP,25672/TCP   14m
statefulset.apps/nccrabbitmqcluster-server     0/1     14m

$ kubectl describe pod/nccrabbitmqcluster-server-0 | tail -n 5
Events:
  Type     Reason            Age        From               Message
  ----     ------            ----       ----               -------
  Warning  FailedScheduling  <unknown>  default-scheduler  running "VolumeBinding" filter plugin for pod "nccrabbitmqcluster-server-0": pod has unbound immediate PersistentVolumeClaims
  Warning  FailedScheduling  <unknown>  default-scheduler  running "VolumeBinding" filter plugin for pod "nccrabbitmqcluster-server-0": pod has unbound immediate PersistentVolumeClaims

$ kubectl describe pvc persistence-nccrabbitmqcluster-server-0
Name:          persistence-nccrabbitmqcluster-server-0
Namespace:     default
StorageClass:  hostpath
Status:        Pending
Volume:
Labels:        app.kubernetes.io/component=rabbitmq
               app.kubernetes.io/name=nccrabbitmqcluster
               app.kubernetes.io/part-of=rabbitmq
Annotations:   volume.beta.kubernetes.io/storage-provisioner: docker.io/hostpath
Finalizers:    [kubernetes.io/pvc-protection]
Capacity:
Access Modes:
VolumeMode:    Filesystem
Mounted By:    nccrabbitmqcluster-server-0
Events:
  Type    Reason                Age                 From                         Message
  ----    ------                ----                ----                         -------
  Normal  ExternalProvisioning  27s (x23 over 19m)  persistentvolume-controller  waiting for a volume to be created, either by external provisioner "docker.io/hostpath" or manually created by system administrator

$ kubectl get storageclasses
NAME                 PROVISIONER          RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
hostpath (default)   docker.io/hostpath   Delete          Immediate           false                  20d

$ kubectl get pv | grep rabbit

为什么不自动创建卷，我应该做什么？

Answer 1

是的，您的本地主机路径不能作为动态卷设置器工作。此运算符需要一个storageclassname，它可以动态创建PVS。在您的情况下，您的操作员持续等待PV被创建。取而代之的是，您可以手动创建一个PV和PVC，如果您是在本地机器上做。查看以下示例-https://github.com/rabbitmq/cluster-operator/blob/main/docs/examples/multiple-disks/rabbitmq.yaml

如果你想尝试像AWS这样的云提供商，那么这很容易。在集群中部署EBS CSI驱动程序，这将为您创建一个storageclass，该storageclass将提供动态卷。