安装docker

wget -O /etc/yum.repos.d/CentOS-Base.repo

yum -y install docker

systemctl start docker.service

systemctl enable docker.service

Docker基础命令

docker search//从Docker Hub搜索镜像

用法： docker search TERM

参数：

--automated=false 仅显示自动创建的镜像

--no-trunc=false 输出信息不截断显示

-s, --stars=0 指定仅显示评价为指定星级以上的镜像

docker search -s 500 nginx //搜索星级为500以上的镜像

[root@localhost ~]# docker info //查看当前信息

Containers: 3

Running: 0

Paused: 0

Stopped: 3

Images: 4

Server Version: 1.12.6

Storage Driver: devicemapper

Pool Name: docker-253:0-101174072-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: 1.39 GB

Data Space Total: 107.4 GB

Data Space Available: 47.1 GB

Metadata Space Used: 2.945 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

docker pull *** //下载镜像 网络需要好

docker pull docker.io/nginx

docker push *** // 上传镜像

docker push crushlinux/nginx//上传到crushlinux仓库

docker images //显示当前系统镜像

cat 本地容器快照名 | docker import - 自定义容器名：自定义标记名 //导入本地容器快照

[root@localhost ~]# ls

anaconda-ks.cfg centos.tar mysql5.tar nginx.tar tomcat.tar

[root@localhost ~]# cat centos.tar |docker import - centos:1

sha256:f4581438dc0c3261dd2396eeaa5b47fbc5d6df504ac9c0f91c9bba5159348009

[root@localhost ~]# docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

centos 1 f4581438dc0c 16 seconds ago 196.7 MB

docker run ***//运行一个容器，-i 交互式，-t 获得一个终端，-d 守护进程的形式运行

[root@localhost ~]# docker run -it centos:1 /bin/bash

[root@4ce4920e7c4f /]# exit

退出容器

1、 exit或ctrl+d //退出并停止容器

2、 先按Ctrl+p再按ctrl+q //退出伪终端，容器后台运行

docker ps //查看容器，-a 查看所有容器，-q只查看容器ID

docker rm //删除一个容器

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

b1ecd7068048 centos:1 "/bin/bash" 5 minutes ago Exited (0) About a minute ago sick_bhabha

359f023ec2fd centos:1 "/bin/bash -c 'while " 7 minutes ago Up 7 minutes boring_hypatia

4ce4920e7c4f centos:1 "/bin/bash" 8 minutes ago Exited (0) 7 minutes ago tender_spence

[root@localhost ~]# docker rm 4ce

4ce

[root@localhost ~]# docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

b1ecd7068048 centos:1 "/bin/bash" 5 minutes ago Exited (0) About a minute ago sick_bhabha

359f023ec2fd centos:1 "/bin/bash -c 'while " 7 minutes ago Up 7 minutes boring_hypatia

docker rmi //删除一个或多个镜像，-f强制删除

[root@localhost ~]# docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

centos 1 f4581438dc0c 10 minutes ago 196.7 MB

[root@localhost ~]# docker rmi centos:1

Failed to remove image (centos:1): Error response from daemon: conflict: unable to remove repository reference "centos:1" (must force) - container 359f023ec2

fd is using its referenced image f4581438dc0c

[root@localhost ~]# docker rmi -f centos:1

Untagged: centos:1

[root@localhost ~]# docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

docker create 创建一个容器，但不运行

docker create -it centos:1 /bin/bash

docker ps -a

docker start|stop|restart|kill //运行已停止的容器|停止|重启|杀死

docker save | load //存储镜像|载入镜像

[root@localhost ~]# docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

centos 1 bdd1f8043fec 5 minutes ago 196.7 MB

[root@localhost ~]# docker save -o centos-6.5.tar centos:1

[root@localhost ~]# ls

anaconda-ks.cfg centos-6.5.tar centos.tar mysql5.tar nginx.tar tomcat.tar

端口映射

[root@localhost ~]# cat nginx.tar | docker import - nginx:1

sha256:bde88d3477d0fb797f76084b465533e15e98e0b39c6f1323667d46bfda317b26

[root@localhost ~]# docker run -p 5500:80 -it nginx:1 /bin/bash//将宿主机5500端口映射给容器的80端口

root@2e8ed3b4f5b4:/# nginx//启动nginx服务