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?