转载：https://www.cnblogs.com/woshimrf/p/after-install-docker.html
docker会下载容器，运行会挂载磁盘，所以我们需要把docker装在大容量的分区。
安装
https://docs.docker.com/install/linux/docker-ce/centos/
修改位置
查看我们挂载的磁盘
# df -h Filesystem Size Used Avail Use% Mounted on udev 7.8G 0 7.8G 0% /dev tmpfs 1.6G 1.7M 1.6G 1% /run /dev/sda2 110G 18G 86G 18% / tmpfs 7.8G 152M 7.7G 2% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup /dev/sdb1 916G 77M 870G 1% /data /dev/sda1 511M 6.1M 505M 2% /boot/efi tmpfs 1.6G 16K 1.6G 1% /run/user/121 tmpfs 1.6G 28K 1.6G 1% /run/user/1000 tmpfs 1.6G 0 1.6G 0% /run/user/0
选择 /data作为docker容器存放地址。
docker info #查看docker的基本信息 #停止docker服务 systemctl stop docker #备份原目录 cp -r /var/lib/docker /data/docker mv /var/lib/docker /var/lib/docker.bak ln -s /data/docker /var/lib/docker systemctl start docker
运行Hello world
# docker run hello-world Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64) 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal. To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash Share images, automate workflows, and more with a free Docker ID: https://hub.docker.com/ For more examples and ideas, visit: https://docs.docker.com/get-started/
查看docker info
# docker info Containers: 3 Running: 0 Paused: 0 Stopped: 3 Images: 1 Server Version: 18.09.7 Storage Driver: overlay2 Backing Filesystem: extfs Supports d_type: true Native Overlay Diff: 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 local logentries splunk syslog Swarm: inactive Runtimes: runc Default Runtime: runc Init Binary: docker-init containerd version: 894b81a4b802e4eb2a91d1ce216b8817763c29fb runc version: 425e105d5a03fabd737a126ad93d62a9eeede87f init version: fec3683 Security Options: apparmor seccomp Profile: default Kernel Version: 4.18.0-20-generic Operating System: Ubuntu 18.04.2 LTS OSType: linux Architecture: x86_64 CPUs: 4 Total Memory: 15.54GiB Name: ryan-computer ID: P5ON:MZEK:XB4K:63NP:DTUX:BQHY:72AR:OP4G:JQ2M:JNDL:T6TU:6NEJ Docker Root Dir: /data/docker Debug Mode (client): false Debug Mode (server): false Registry: https://index.docker.io/v1/ Labels: Experimental: false Insecure Registries: 127.0.0.0/8 Live Restore Enabled: false Product License: Community Engine WARNING: No swap limit support