卷已通过广告连播附加 [英] Volume is already attached by pod
问题描述
我在裸机上的ubuntu上安装了kubernetes.我部署了1个主机和3个工人. 然后部署rook，一切正常.但是当我想在其上部署wordpress时，它停留在容器创建中，然后删除wordpress，现在出现此错误
I install kubernetes on ubuntu on baremetal. I deploy 1 master and 3 worker. and then deploy rook and every thing work fine.but when i want to deploy a wordpress on it ,it stuck in container creating and then i delete wordpress and now i got this error
卷已通过pod附加 默认/wordpress-mysql-b78774f44-gvr58.状态正在运行
Volume is already attached by pod default/wordpress-mysql-b78774f44-gvr58. Status Running
#kubectl describe pods wordpress-mysql-b78774f44-bjc2c
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 3m21s default-scheduler Successfully assigned default/wordpress-mysql-b78774f44-bjc2c to worker2
Warning FailedMount 2m57s (x6 over 3m16s) kubelet, worker2 MountVolume.SetUp failed for volume "pvc-dcba7817-553b-11e9-a229-52540076d16c" : mount command failed, status: Failure, reason: Rook: Mount volume failed: failed to attach volume pvc-dcba7817-553b-11e9-a229-52540076d16c for pod default/wordpress-mysql-b78774f44-bjc2c. Volume is already attached by pod default/wordpress-mysql-b78774f44-gvr58. Status Running
Normal Pulling 2m26s kubelet, worker2 Pulling image "mysql:5.6"
Normal Pulled 110s kubelet, worker2 Successfully pulled image "mysql:5.6"
Normal Created 106s kubelet, worker2 Created container mysql
Normal Started 101s kubelet, worker2 Started container mysql
for more information
# kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
pvc-dcba7817-553b-11e9-a229-52540076d16c 20Gi RWO Delete Bound default/mysql-pv-claim rook-ceph-block 13m
pvc-e9797517-553b-11e9-a229-52540076d16c 20Gi RWO Delete Bound default/wp-pv-claim rook-ceph-block 13m
#kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
mysql-pv-claim Bound pvc-dcba7817-553b-11e9-a229-52540076d16c 20Gi RWO rook-ceph-block 15m
wp-pv-claim Bound pvc-e9797517-553b-11e9-a229-52540076d16c 20Gi RWO rook-ceph-block 14m
#kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
default wordpress-595685cc49-sdbfk 1/1 Running 6 9m58s
default wordpress-mysql-b78774f44-bjc2c 1/1 Running 0 8m14s
kube-system coredns-fb8b8dccf-plnt4 1/1 Running 0 46m
kube-system coredns-fb8b8dccf-xrkql 1/1 Running 0 47m
kube-system etcd-master 1/1 Running 0 46m
kube-system kube-apiserver-master 1/1 Running 0 46m
kube-system kube-controller-manager-master 1/1 Running 1 46m
kube-system kube-flannel-ds-amd64-45bsf 1/1 Running 0 40m
kube-system kube-flannel-ds-amd64-5nxfz 1/1 Running 0 40m
kube-system kube-flannel-ds-amd64-pnln9 1/1 Running 0 40m
kube-system kube-flannel-ds-amd64-sg4pv 1/1 Running 0 40m
kube-system kube-proxy-2xsrn 1/1 Running 0 47m
kube-system kube-proxy-mll8b 1/1 Running 0 42m
kube-system kube-proxy-mv5dw 1/1 Running 0 42m
kube-system kube-proxy-v2jww 1/1 Running 0 42m
kube-system kube-scheduler-master 1/1 Running 0 46m
rook-ceph-system rook-ceph-agent-8pbtv 1/1 Running 0 26m
rook-ceph-system rook-ceph-agent-hsn27 1/1 Running 0 26m
rook-ceph-system rook-ceph-agent-qjqqx 1/1 Running 0 26m
rook-ceph-system rook-ceph-operator-d97564799-9szvr 1/1 Running 0 27m
rook-ceph-system rook-discover-26g84 1/1 Running 0 26m
rook-ceph-system rook-discover-hf7lc 1/1 Running 0 26m
rook-ceph-system rook-discover-jc72g 1/1 Running 0 26m
rook-ceph rook-ceph-mgr-a-68cb58b456-9rrj7 1/1 Running 0 21m
rook-ceph rook-ceph-mon-a-6469b4c68f-cq6mj 1/1 Running 0 23m
rook-ceph rook-ceph-mon-b-d59cfd758-2d2zt 1/1 Running 0 22m
rook-ceph rook-ceph-mon-c-79664b789-wl4t4 1/1 Running 0 21m
rook-ceph rook-ceph-osd-0-8778dbbc-d84mh 1/1 Running 0 19m
rook-ceph rook-ceph-osd-1-84974b86f6-z5c6c 1/1 Running 0 19m
rook-ceph rook-ceph-osd-2-84f9b78587-czx6d 1/1 Running 0 19m
rook-ceph rook-ceph-osd-prepare-worker1-x4rqc 0/2 Completed 0 20m
rook-ceph rook-ceph-osd-prepare-worker2-29jpg 0/2 Completed 0 20m
rook-ceph rook-ceph-osd-prepare-worker3-rkp52 0/2 Completed 0 20m
推荐答案
您正在为PVC使用标准的类存储，并且您的策略将为ReadWriteOnce.这并不意味着您只能将PVC连接到一个Pod，而只能连接到一个 node .
You are using a standard class storage for your PVC, and your policy will be ReadWriteOnce. This does not mean you can only connect your PVC to one pod, but only to one node.
ReadWriteOnce–该卷可以通过单个节点以读写方式安装
ReadWriteOnce– the volume can be mounted as read-write by a single node
ReadWriteMany –该卷可以被许多节点以读写方式装入
ReadWriteMany – the volume can be mounted as read-write by many nodes
在这里，似乎您有2个吊舱试图装载此卷.除非您执行以下两项操作之一，否则这会很容易.
Here, seems like you have 2 pods trying to mount this volume. This will be flakey unless you do one of two things:
- 在同一节点上安排两个吊舱
- 使用其他
storageClasses，例如 NFS (文件系统)将政策更改为ReadWriteMany - 缩小为1个窗格，因此您不必共享音量
- Schedule both pods on the same node
- Use other
storageClassessuch as NFS (FileSystem) to change policy toReadWriteMany - Downscale to 1 pod, so you don't have to share the volume
现在您有2个Pod尝试安装相同的卷default/wordpress-mysql-b78774f44-gvr58和default/wordpress-mysql-b78774f44-bjc2c.
Right now you have 2 pods trying to mount the same volume, default/wordpress-mysql-b78774f44-gvr58 and default/wordpress-mysql-b78774f44-bjc2c.
您还可以缩小到1个广告连播，因此您完全不必担心上述任何一项:
You can also downscale to 1 pod, so you don't have to worry about any of the above altogether:
kubectl scale deploy wordpress-mysql --replicas=1
这篇关于卷已通过广告连播附加的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
