安装Docker-优快云博客

移除旧的版本

sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine

安装一些必要的系统工具

yum install -y yum-utils device-mapper-persistent-data lvm2

添加软件源信息

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

更新 yum 缓存

yum makecache fast

安装 Docker-ce

yum -y install docker-ce

启动Docker后台服务

systemctl start docker

测试运行 hello-world

docker run hello-world

运行结果

Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete 
Digest: sha256:0e11c388b664df8a27a901dce21eb89f11d8292f7fca1b3e3c4321bf7897bffe
Status: Downloaded newer image for hello-world:latest

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/

Docker运行nginx

拉取镜像

docker pull hub.c.163.com/library/nginx:latest

以后台运行nginx，并指定端口映射。- -name指定容器名称，如果不指定，默认会随机生成一个名称，-d代表后台运行，8080是指主机端口，80为容器端口

docker run --name nginx-test -d -p 8080:80 hub.c.163.com/library/nginx

使用docker ps命令查看运行的容器

CONTAINER ID	IMAGE	…	PORTS	NAMES
4f1523ef4d16	hub.c.163.com/library/nginx	…	0.0.0.0:8080->80/tcp	nginx-test

浏览器输入ip:8080即可访问到nginx页面

常用命令

拉取镜像，TAG是版本号的意思

docker pull [OPTIONS] NAME[:TAG]

查看本机有哪些镜像,[REPOSITORY [:TAG]]指定镜像名称和TAG

docker images [OPTIONS] [REPOSITORY [:TAG]]

删除镜像

docker rmi IMAGEID

强制删除镜像

docker rmi -f IMAGEID

运行docker,COMMAND是指要执行的命令，ARG…是指命令依赖的参数

docker run [OPTIONS] IMAGE[:TAG] [COMMAND] [ARG...]

查看机器上运行的容器

docker ps

查看机器上运行过的容器

docker ps -a

进入运行的容器

docker exec -it CONTAINERID /bin/bash

停止容器

docker stop CONTAINERID

启动容器

docker start CONTAINERID

停用全部运行中的容器

docker stop $(docker ps -q)

删除全部容器

docker rm $(docker ps -aq)

一条命令实现停用并删除容器

docker stop $(docker ps -q) & docker rm $(docker ps -aq)