我安装了具有 1 个 master 和 3 个 worker 的 kubernetes 并在其上部署了 rook，并且ceph status在 rook-tools 中显示ok。https://github.com/rook/rook.git中有 wordpress 模板，
当我创建它时，pod 没有创建并且
#kubectl describe pods wordpress-mysql-b78774f44-m548z -n default
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedMount 15m (x51 over 128m) kubelet, ubuntu2 Unable to mount volumes for pod "test-pod-rbd_rook-ceph(15abe007-53a4-11e9-abd9-7c8bca00f216)": timeout expired waiting for volumes to attach or mount for pod "rook-ceph"/"test-pod-rbd". list of unmounted volumes=[data]. list of unattached volumes=[data default-token-8p9br]
Warning FailedMount 18s (x72 over 130m) kubelet, ubuntu2 MountVolume.SetUp failed for volume "pvc-fd3fdbc4-53b7-11e9-abd9-7c8bca00f216" : mount command failed, status: Failure, reason: failed to mount volume /dev/rbd1 [xfs] to /var/lib/kubelet/plugins/ceph.rook.io/rook-ceph-system/mounts/pvc-fd3fdbc4-53b7-11e9-abd9-7c8bca00f216, error executable file not found in $PATH
#kubectl get events
18h Warning FailedMount pod/wordpress-mysql-b78774f44-m548z MountVolume.SetUp failed for volume "pvc-e1e758a8-53b6-11e9-abd9-7c8bca00f216" : mount command failed, status: Failure, reason: failed to mount volume /dev/rbd0 [xfs] to /var/lib/kubelet/plugins/ceph.rook.io/rook-ceph-system/mounts/pvc-e1e758a8-53b6-11e9-abd9-7c8bca00f216, error executable file not found in $PATH
18h Warning FailedMount pod/wordpress-mysql-b78774f44-m548z Unable to mount volumes for pod "wordpress-mysql-b78774f44-m548z_default(e1f6de90-53b6-11e9-abd9-7c8bca00f216)": timeout expired waiting for volumes to attach or mount for pod "default"/"wordpress-mysql-b78774f44-m548z". list of unmounted volumes=[mysql-persistent-storage]. list of unattached volumes=[mysql-persistent-storage default-token-bktfl]
35m Warning FailedMount pod/wordpress-mysql-b78774f44-m548z MountVolume.SetUp failed for volume "pvc-e1e758a8-53b6-11e9-abd9-7c8bca00f216" : mount command failed, status: Failure, reason: Rook: Error getting RPC client: error connecting to socket /usr/libexec/kubernetes/kubelet-plugins/volume/exec/ceph.rook.io~rook-ceph-system/.rook.sock: dial unix /usr/libexec/kubernetes/kubelet-plugins/volume/exec/ceph.rook.io~rook-ceph-system/.rook.sock: connect: connection refused
6m32s Warning FailedMount pod/wordpress-mysql-b78774f44-m548z Unable to mount volumes for pod "wordpress-mysql-b78774f44-m548z_default(e1f6de90-53b6-11e9-abd9-7c8bca00f216)": timeout expired waiting for volumes to attach or mount for pod "default"/"wordpress-mysql-b78774f44-m548z". list of unmounted volumes=[mysql-persistent-storage]. list of unattached volumes=[mysql-persistent-storage default-token-bktfl]
4m17s Warning FailedMount pod/wordpress-mysql-b78774f44-m548z MountVolume.SetUp failed for volume "pvc-e1e758a8-53b6-11e9-abd9-7c8bca00f216" : mount command failed, status: Failure, reason: Rook: Mount volume failed: failed to attach volume replicapool/pvc-e1e758a8-53b6-11e9-abd9-7c8bca00f216: failed to map image replicapool/pvc-e1e758a8-53b6-11e9-abd9-7c8bca00f216 cluster rook-ceph. failed to map image replicapool/pvc-e1e758a8-53b6-11e9-abd9-7c8bca00f216: Failed to complete 'rbd': signal: interrupt. . output:
我该如何解决？它是一个错误吗？