Centos系統下docker的安裝與解除安裝 最靠譜 本人用過了

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Docker簡介

Docker 是一個開源的應用容器引擎，讓開發者可以打包他們的應用以及依賴包到一個可移植的容器中，然後釋出到任何流行的 Linux 機器上，也可以實作虛拟化。容器是完全使用沙箱機制，互相之間不會有任何接口（類似 iPhone 的 app）。幾乎沒有性能開銷,可以很容易地在機器和資料中心中運作。最重要的是,他們不依賴于任何語言、架構包括系統。 

百度百科

前提

首先，你的Centos的系統一定要是64位的，不管版本是什麼。并且核心版本至少是3.10以上。 

用以下指令去檢視你的核心版本：

$ uname -r
3.10.0-229.el7.x86_64           

• 1
• 2

最後，建議你更新你的系統，因為最新核心可能會修複了舊版本的一些bug。

安裝

用yum安裝

用具有sudo或者root權限的使用者登入系統。

確定你的yum包已經更新

$ sudo yum update           

添加yum倉庫

$ 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           

安裝Docker包

$ sudo yum install docker-engine              或者 yum install docker           

• 開啟docker deamon

$ sudo service docker start           

驗證docker是否成功安裝

$ 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/           

開機自啟動

$ sudo chkconfig docker on              systemctl enable docker.service
           

解除安裝

列出你安裝過的包

$ 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           

删除安裝包

$ sudo yum -y remove docker-engine.x86_64           

删除鏡像/容器等

$ rm -rf /var/lib/docker           

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