Centos7 docker installation details

View kernel and operating system version
[ root@prod3 ~]# uname -r
3.10.0- 327. el7.x86_64
[ root@prod3 ~]# cat /etc/redhat-release
CentOS Linux release 7.2.1511
1、 Install yum source
yum install -y epel-release
2、 yum install docker
yum install docker -y
3、 Start docker and set it to start on boot
systemctl start docker.service
systemctl enable docker.service
After installing docker, there will be an extra intranet ip segment (used by docker container)
[ root@prod3 ~]# ip addr
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN
link/ether 02:42:e6:44:58:df brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 scope global docker0
valid_lft forever preferred_lft forever
4、 Find centos mirror
docker search centos
[ root@prod1 ~]# docker search centos
INDEX NAME DESCRIPTION STARS OFFICIAL AUTOMATED
docker.io docker.io/centos The official build of CentOS. 3184 [OK]

5、 Download mirror
docker search centos
[ root@prod3 ~]# docker pull centos
Using default tag: latest
Trying to pull repository docker.io/library/centos ...
latest: Pulling from docker.io/library/centos
785 fe1d06b2d: Pull complete
Digest: sha256:be5b4a93f116a57ab3fd454ada72421eac892a3a4925627ac9a44f65fcd69cf8
6、 Check out the good mirror
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/centos latest 98d35105a391 28 hours ago 192.5 MB
7、 Run a container
docker run -it 98d35105a391 /bin/bash

Common commands
1、 docker info summary information
2、 docker images view image
3、 docker ps -a container status view
4、 docker pull centos (custom) download image
5、 docker search centos (custom) to find the mirror
6、 docker run starts the container
Case docker run --name some-nginx -p 80:80 -v /some/content:/usr/share/nginx/html -d nginx

• • name: Assign a name to the container
• d: Make the container execute in the background
• v: Bind the mount point, mount the [Host] (https://cloud.tencent.com/product/cdh?from=10680) directory to the directory in the container
• p: port mapping, map the host host port to the port in the container
  7、 docker logs ID Get output information in the container
  8、 docker stop ID stops the started container
  9、 docker start ID starts a stopped container
  10、 docker restart ID restart the container
  11、 docker export 7691a814370e(container id)> centos_a.tar export container snapshot to local
  12、 cat centos_a.tar | docker import-test/centos_a:v1.0 Import from the container snapshot file as a mirror
  13、 docker save -o centos.6.tar (file) centos:6 (mirror) Save the image to a file
  14、 docker load --input centos.6.tar import as a mirror file
  15、 docker rm container ID delete the container in the terminated state plus -f forcefully terminate the running container
  16、 docker rmi test/centos_a:v1.0 Remove the local mirror. Before deleting the mirror, use docker rm to delete all the containers that depend on this mirror.
  17、 docker version View docker version
  18、 docker build -t (image name) (image file path) to build a custom image
  Example: docker build -t keven/centos.
  19、 docker attach into the container