修改 Docker 默认存储位置
docker默认会使用 /var/lib/docker 作为默认存储位置，以防万一 使用 Docker info 查看Docker 基本信息
[root@localhost ~]# docker info
Containers: 1
Running: 1
Paused: 0
Stopped: 0
Images: 1
Server Version: 1.12.6
Storage Driver: devicemapper
Pool Name: docker-253:1-1180369-pool
Pool Blocksize: 65.54 kB
Base Device Size: 10.74 GB
Backing Filesystem: xfs
Data file: /dev/loop0
Metadata file: /dev/loop1
Data Space Used: 2.059 GB
Data Space Total: 107.4 GB
Data Space Available: 47.65 GB
Metadata Space Used: 2.961 MB
Metadata Space Total: 2.147 GB
Metadata Space Available: 2.145 GB
Thin Pool Minimum Free Space: 10.74 GB
Udev Sync Supported: true
Deferred Removal Enabled: false
Deferred Deletion Enabled: false
Deferred Deleted Device Count: 0
Data loop file: /var/lib/docker/devicemapper/devicemapper/data
WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
Library Version: 1.02.140-RHEL7 (2017-05-03)
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: host overlay bridge null
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Security Options: seccomp
Kernel Version: 3.10.0-693.17.1.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 3.851 GiB
Name: localhost.localdomain
ID: HHIS:LF65:RTOS:6ABA:YSHF:MXGI:AMPF:OYSQ:FFYP:VW5V:TB6P:REDL
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Experimental: true
Insecure Registries:
127.0.0.0/8
You have new mail in /var/spool/mail/root
- 停止 Docker 服务
[root@localhost ~]# systemctl stop docker
- 备份Docker 目录， 并迁移建立软连接
[root@localhost ~]# cd /var/lib
[root@localhost lib]# cp -rf docker docker.bak
[root@localhost lib]# mv docker /data/
[root@localhost lib]# ln -s /data/docker docker
- 启动 Docker 服务
[root@localhost ~]# systemctl start docker
- Docker info 查看迁移后状态
[root@localhost lib]# docker info
Containers: 1
Running: 1
Paused: 0
Stopped: 0
Images: 1
Server Version: 1.12.6
Storage Driver: devicemapper
Pool Name: docker-253:17-3932305-pool
Pool Blocksize: 65.54 kB
Base Device Size: 10.74 GB
Backing Filesystem: xfs
Data file: /dev/loop0
Metadata file: /dev/loop1
Data Space Used: 2.059 GB
Data Space Total: 107.4 GB
Data Space Available: 94.57 GB
Metadata Space Used: 2.966 MB
Metadata Space Total: 2.147 GB
Metadata Space Available: 2.145 GB
Thin Pool Minimum Free Space: 10.74 GB
Udev Sync Supported: true
Deferred Removal Enabled: false
Deferred Deletion Enabled: false
Deferred Deleted Device Count: 0
Data loop file: /data/docker/devicemapper/devicemapper/data
WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
Metadata loop file: /data/docker/devicemapper/devicemapper/metadata
Library Version: 1.02.140-RHEL7 (2017-05-03)
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: host bridge null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Security Options: seccomp
Kernel Version: 3.10.0-693.17.1.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 3.851 GiB
Name: localhost.localdomain
ID: HHIS:LF65:RTOS:6ABA:YSHF:MXGI:AMPF:OYSQ:FFYP:VW5V:TB6P:REDL
Docker Root Dir: /data/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Experimental: true
Insecure Registries:
127.0.0.0/8
You have new mail in /var/spool/mail/root
