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