切换docker root dir

注意
创建daemon.json

修改docker的container目录,如果放在系统盘。容器和镜像太多，或者日志打印过大，会将系统盘堆满，所以需要切换container目录

官网链接：https://docs.docker.com/v1.11/engine/reference/commandline/daemon/#daemon-configuration-file

注意

目录切换完成后，下载个hello-world镜像进行测试

修改完docker root dir，重启后，下载镜像报错： docker: Error response from daemon: containerd: container did not start before the specified timeout. ERRO[0133] error getting events from daemon: context canceled 解决：重启服务器

创建daemon.json

切换root权限，创建/etc/docker/daemon.json:

sudo su
vim /etc/docker/daemon.json

daemon.json内容：

graph:切换docker root dir

registry-mirrors：切换镜像下载的默认镜像私服

{"graph":"/data/docker/container/","registry-mirrors": ["https://z8x8tdv4.mirror.aliyuncs.com"]}

创建保存的目录:

mkdir -p /data/docker/container/

重启:

sudo service docker restart

查询是否切换成功

docker info

Containers: 18
 Running: 12
 Paused: 0
 Stopped: 6
Images: 14
Server Version: 17.03.1-ce
Storage Driver: aufs
 Root Dir: /data/docker/container/aufs
 Backing Filesystem: extfs
 Dirs: 105
 Dirperm1 Supported: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins: 
 Volume: local
 Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 4ab9917febca54791c5f071a9d1f404867857fcc
runc version: 54296cf40ad8143b62dbcaa1d90e520a2136ddfe
init version: 949e6fa
Security Options:
 apparmor
Kernel Version: 3.19.0-25-generic
Operating System: Ubuntu 14.04.3 LTS
OSType: linux
Architecture: x86_64
CPUs: 32
Total Memory: 125.8 GiB
Name: rz15831
ID: VJQW:EZPK:FXAK:O7IE:SKAR:OGAG:TSVC:X6U2:EQTZ:DKZV:BMXZ:K6HA
Docker Root Dir: /data/docker/container
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
WARNING: No swap limit support
Experimental: false
Insecure Registries:
 172.25.158.100
 127.0.0.0/8
Registry Mirrors:
 https://z8x8tdv4.mirror.aliyuncs.com
Live Restore Enabled: false

Docker Root Dir: /data/docker/container