在Google Kubernetes Engine(GKE)中挂载Rook卷

时间:2019-06-06 16:39:21

标签: kubernetes google-kubernetes-engine ceph rook-storage

我一直在研究Rook + Ceph的Kubernetes,试图使其在Google Kubernetes Engine下工作,并且遇到了麻烦。

按照文档操作,我运行了以下命令,并验证了每个命令均具有预期的效果:

kubectl create -f common.yaml
kubectl create -f operator.yaml
kubectl create -f cluster.yaml
kubectl create -f filesystem.yaml

除了operator.yaml以外,所有yaml文件的默认名称均为provided by Rook,其中the GKE docs中添加了以下环境变量:

- name: FLEXVOLUME_DIR_PATH
  value: "/home/kubernetes/flexvolume"

但是,我不确定从这里去哪里。他们的文档中有一个用于creating a registry的示例文件,该文件导致了与我尝试实现的目标无关的繁琐说明。

基本上,我希望能够从常规ol'容器映像中将Ceph共享文件存储作为卷挂载。我尝试了以下Yaml,但未成功:

apiVersion: v1
kind: Pod
metadata:
  name: ubuntu
  namespace: default
spec:
  containers:
  - name: ubuntu
    image: ubuntu:bionic
    command:
      - sleep
      - "3600"
    imagePullPolicy: IfNotPresent
    volumeMounts:
    - name: image-store
      mountPath: /mnt/shared
  volumes:
  - name: image-store
    flexVolume:
      driver: ceph.rook.io/rook
      fsType: ceph
      options:
        fsName: myfs
        clusterNamespace: rook-ceph
  restartPolicy: Always

据我所知有限,我看不出为什么这行不通,但是在执行kubectl describe pods ubuntu时得到以下输出:

Mounting command: systemd-run
Mounting arguments: --description=Kubernetes transient mount for /var/lib/kubelet/pods/10ee80d1-8873-11e9-8f45-42010a8a01d8/volumes/ceph.rook.io~rook/image-store --scope -- mount -t ceph -o name=admin,secret=AQDAM/lcQFKHARAAh/O27Wl+iRKRzREsMML+4g==,mds_namespace=myfs 10.8.3.134:6789,10.8.13.226:6789,10.8.5.39:6789:/ /var/lib/kubelet/pods/10ee80d1-8873-11e9-8f45-42010a8a01d8/volumes/ceph.rook.io~rook/image-store
Output: Running scope as unit: run-reb61186d1ff64e6e846a200580aa5395.scope
mount: /var/lib/kubelet/pods/10ee80d1-8873-11e9-8f45-42010a8a01d8/volumes/ceph.rook.io~rook/image-store: special device 10.8.3.134:6789,10.8.13.226:6789,10.8.5.39:6789:/ does not exist.
  Warning  FailedMount  51s (x2 over 2m53s)  kubelet, gke-kubey-cluster-default-pool-6856b374-nb0c  (combined from similar events): MountVolume.SetUp failed for volume "image-store" : mount command failed, status: Failure, reason: failed to mount filesystem myfs to /var/lib/kubelet/pods/10ee80d1-8873-11e9-8f45-42010a8a01d8/volumes/ceph.rook.io~rook/image-store with monitor 10.8.3.134:6789,10.8.13.226:6789,10.8.5.39:6789:/ and options [name=admin secret=AQDAM/lcQFKHARAAh/O27Wl+iRKRzREsMML+4g== mds_namespace=myfs]: mount failed: exit status 32

是否有示例说明如何在野外某个地方实现这种目标?

1 个答案:

答案 0 :(得分:1)

确保满足Rook设置的所有先决条件:rook_setup

然后尝试安装:

nfs-common

在所有节点上。