Docker默认的存储目录是/var/lib/docker。
如果/var目录分配空间较小，那么随着镜像的增加，将撑爆这个目录，造成镜像被kubelet自动删除，下面的方法试验更改存储目录及迁移已有的镜像。
Env:
[root@centos152 ~]#
kubelet --version
Kubernetes v1.22.4
[root@centos152 ~]#
docker -v
Docker version
20.10.11, build dea9396
[root@centos152 ~]#
1.
查看默认存储路径
|
[root@centos151
AppServer]# docker info |grep
"Docker Root Dir" WARNING:
overlay2: the backing xfs filesystem is formatted without d_type support,
which leads to incorrect behavior. Reformat the filesystem with ftype=1
to enable d_type support. Running without d_type support will
not be supported in future releases. Docker Root Dir: /var/lib/docker |
2.
查看Docker的磁盘使用情况
|
[root@centos151
AppServer]# docker system df TYPE TOTAL ACTIVE
SIZE RECLAIMABLE Images 11 8 1.156GB 347.2MB (30%) Containers 16
16 2.45kB 0B (0%) Local
Volumes 0 0 0B 0B Build
Cache 0 0 0B 0B [root@centos151 AppServer]# |
3.
把docker目录迁移到/home/dockerdata下
|
[root@centos151 AppServer]# mkdir -p /home/dockerdata 停止 k8s docker systemctl stop kubelet systemctl stop docker 把/var/lib/docker同步到/home/dockerdata下 [root@centos151
AppServer]# rsync -avzHP /var/lib/docker /home/dockerdata |
4.
修改存储路径
|
vi
/etc/docker/daemon.json 增加一行
"graph":"/home/dockerdatar/docker" [root@centos151
AppServer]# vi /etc/docker/daemon.json { "registry-mirrors": ["https://qnaf9aj5.mirror.aliyuncs.com"],
"graph":"/home/dockerdata/docker" } |
5.
重启docker
k8s并验证
|
[root@centos151 dockerdata]#
systemctl daemon-reload systemctl start docker systemctl start kubelet 验证： [root@centos151 dockerdata]# docker
info |grep "Docker Root Dir" WARNING: overlay2: the backing xfs
filesystem is formatted without d_type support, which leads to incorrect
behavior. Reformat the filesystem with ftype=1
to enable d_type support. Running without d_type support will
not be supported in future releases. Docker Root Dir: /home/dockerdata/docker 镜像验证： [root@centos151 bin]# docker images REPOSITORY
TAG IMAGE ID CREATED SIZE k8s.gcr.io/kube-apiserver v1.22.4 8a5cc299272d 3 weeks ago 128MB k8s.gcr.io/kube-controller-manager v1.22.4 0ce02f92d3e4 3 weeks ago 122MB k8s.gcr.io/kube-scheduler v1.22.4 721ba97f54a6 3 weeks ago 52.7MB k8s.gcr.io/kube-proxy v1.22.4 edeff87e4802 3 weeks ago 104MB quay.io/coreos/flannel v0.15.1 e6ea68648f0c 3 weeks ago 69.5MB rancher/mirrored-flannelcni-flannel-cni-plugin v1.0.0
cd5235cd7dc2 5 weeks ago 9.03MB rancher/mirrored-flannelcni-flannel-cni-plugin v1.0.0
cd5235cd7dc2 5 weeks ago 9.03MB willdockerhub/ingress-nginx-controller v1.0.0 ef43679c2cae 3 months ago 283MB k8s.gcr.io/etcd
3.5.0-0 004811815584 5 months ago 295MB k8s.gcr.io/coredns/coredns v1.8.4 8d147537fb7d 6 months ago 47.6MB k8s.gcr.io/pause 3.5 ed210e3e4a5b 8 months ago 683kB jettech/kube-webhook-certgen v1.0.0 f3b9b9fa842c 2 years ago 51.5MB [root@centos151
bin]# 成功 |
6.
回退
vi
/etc/docker/daemon.json，把 "graph":"/home/dockerdata/docker" 删除重启就回退了
