Centos下docker安装与卸载

Docker简介

Docker是一个开源的应用容器引擎，让开发者可以打包他们的应用以及依赖包到一个可移植的容器中，然后发布到任何流行的 Linux 机器上，也可以实现虚拟化。容器是完全使用沙箱机制，相互之间不会有任何接口（类似 iPhone 的 app）。几乎没有性能开销,可以很容易地在机器和数据中心中运行。最重要的是,他们不依赖于任何语言、框架包括系统。

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前提

Centos的系统一定要是64位的，并且内核版本至少是3.10以上。

用以下命令去查看你的内核版本：

$ uname -r

3.10.0-229.el7.x86_64

安装

用具有sudo或者root权限的用户登录系统,确保你的yum包已经更新

$ sudo yum update

添加yum仓库

$ sudo tee /etc/yum.repos.d/docker.repo <<-'EOF'

[dockerrepo]

name=Docker Repository

baseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/

enabled=1

gpgcheck=1

gpgkey=https://yum.dockerproject.org/gpg

EOF

安装Docker包

$ sudo yum install docker-engine

开启docker deamon

$ sudo service docker start

如果失败就执行syatemctl enable docker.server

验证docker是否成功安装

$ sudo docker run hello-world

Unable to find image 'hello-world:latest' locally

    latest: Pulling from hello-world

    a8219747be10: Pull complete

    91c95931e552: Already exists

    hello-world:latest: The image you are pulling has been verified. Important: image verification is a tech preview feature and should not be relied on to provide security.

    Digest: sha256:aa03e5d0d5553b4c3473e89c8619cf79df368babd1.7.1cf5daeb82aab55838d

    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.

            (Assuming it was not already locally available.)

     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

    For more examples and ideas, visit:

     http://docs.docker.com/userguide/

开机自启动

$ sudo chkconfig docker on

卸载

列出你安装过的包

$ yum list installed | grep docker

yum list installed | grep docker

docker-engine.x86_64   1.7.1-1.el7 @/docker-engine-1.7.1-1.el7.x86_64.rpm

删除安装包

$ sudo yum -y remove docker-engine.x86_64

删除镜像/容器等

$ rm -rf /var/lib/docker