Centos下安裝docker教程

更新時間：2016年02月04日 08:59:54 投稿：hebedich

本文給大家介紹的是在centos下安裝docker的詳細教程，分為yum安裝和腳本安裝2種方式，有需要的小伙伴可以參考下。

通過yum安裝

需要root或者能sudo的權(quán)限

yum包更新到最新

$ sudo yum update

添加Docker yum源

$ 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

啟動Docker守護進程

$ sudo service docker start

通過測試鏡像運行一個容器來驗證Docker是否安裝正確

$ 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/

通過腳本安裝

需要root或者能sudo的權(quán)限

yum包更新到最新

$ sudo yum update

運行Docker安裝腳本

$ curl -sSL https://get.docker.com/ | sh

這個腳本會添加docker.repo倉庫并且安裝Docker

啟動Docker守護進程

$ sudo service docker start

通過測試鏡像運行一個容器來驗證Docker是否安裝正確

$ sudo docker run hello-world

創(chuàng)建一個Docker用戶組

docker守護進程綁定在Unix socket 而不是 TCP 端口。默認情況下Unix socket屬于root用戶和具有sudo權(quán)限用戶的使用范疇。出于這個原因，docker守護進程需要一直在root用戶下面運行。

To avoid having to use sudo when you use the docker command, create a Unix group called docker and add users to it. When the docker daemon starts, it makes the ownership of the Unix socket read/writable by the docker group.

為了避免運行docker命令的時候需要使用sudo命令，創(chuàng)建一個叫docker的Unix用戶組并將需要運行docker的用戶添加進去。當開始運行docker守護進程，會令docker用戶組的成員擁有Unix socket的讀寫權(quán)限。

創(chuàng)建docker用戶組并添加用戶：

1.需要root或者能sudo的權(quán)限
2.創(chuàng)建docker用戶組并添加用戶