docker修改存储驱动为Overlay2

docker修改存储驱动为Overlay2

很旧的一个节点老是出问题，查询可能是因为存储驱动overlay本身的局限性所导致的，遂换成overlay2驱动。

1、确认目前docker版本及参数

[root@test docker]# docker info Containers: 3 Running: 3 Paused: 0 Stopped: 0 Images: 30 Server Version: 17.09.0-ce Storage Driver: overlay Backing Filesystem: extfs Supports d_type: true Logging Driver: json-file Cgroup Driver: cgroupfs Plugins: Volume: local Network: bridge host macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog Swarm: inactive Runtimes: runc Default Runtime: runc Init Binary: docker-init containerd version: 06b9cb35161009dcb7123345749fef02f7cea8e0 runc version: 3f2f8b84a77f73d38244dd690525642a72156c64 init version: 949e6fa Security Options: seccomp Profile: default Kernel Version: 3.10.0-514.26.2.el7.x86_64 Operating System: CentOS Linux 7 (Core) OSType: linux Architecture: x86_64 CPUs: 4 Total Memory: 31.26GiB Name: hckjarm ID: XGKE:CZQE:RYV5:I2IO:SUML:ZOZU:WHHO:SONT:VR7M:VHCJ:FE5W:TUIB Docker Root Dir: /var/lib/docker Debug Mode (client): false Debug Mode (server): false Registry: https://index.docker.io/v1/ Experimental: false Insecure Registries: 127.0.0.0/8 Live Restore Enabled: false

2、确认image版本

[root@test docker]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE production_nginx latest e4bb0aecdb15 3 months ago 107MB production_php latest 1983f90f7de4 8 months ago 574MB php 7.1-fpm-stretch 9641b421abf5 9 months ago 358MB production_redis latest 61c5d36c8032 9 months ago 118MB php 7.1-fpm 0f0f618f7b8c 9 months ago 391MB redis 5.0 598a6f110d01 9 months ago 118MB php 7.0-fpm 5b87b5758b16 2 years ago 381MB nginx 1.13.3 b8efb18f159b 2 years ago 107MB [root@test ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES a2ca42445329 production_nginx "nginx -g 'daemon ..." 11 hours ago Up 11 hours 0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp production_nginx_1 128d4255e14d production_php "docker-php-entryp..." 11 hours ago Up 11 hours 8001/tcp, 0.0.0.0:9000->9000/tcp production_php_1 90851a567b3c production_redis "docker-entrypoint..." 11 hours ago Up 11 hours 0.0.0.0:6379->6379/tcp production_redis_1

3、确认（备份）挂载目录，

tar zcf /usr/local/src/web.tar.gz /root/web/

4、停止docker

systemctl stop docker

5、备份 /var/lib/docker 目录（目录比较大）

cp -au /var/lib/docker /var/lib/docker.bk 直接重命名目录 cd /var/lib/ mv docker docker.bak

6、修改docker参数

vim /etc/docker/daemon.json.

{ "registry-mirrors": ["https://0ev01gpj.mirror.aliyuncs.com"], "storage-driver": "overlay2" } 或 { "registry-mirrors": ["https://0ev01gpj.mirror.aliyuncs.com"], "storage-driver": "overlay2", "storage-opts": [ "overlay2.override_kernel_check=true" ] }

docker image run fast

"registry-mirrors": ["start docker

如启动报错根据具体日志信息排错，正常即跳过

8、验证是否生效

docker info Containers: 0 Images: 0 Storage Driver: overlay2 Backing Filesystem: xfs Supports d_type: true Native Overlay Diff: true

Docker现在正在使用Overlay2存储驱动程序，并且已经使用所需的LowerDir、UpperDir、Merged和WorkDir结构自动创建了Overlay Mount。

9、下载相应版本image或直接docker-compose up

参考资料：

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