ubuntu和centos安装docker

一. UBUNTU系统上

1. 卸载旧版本（新系统不用执行）

sudo apt-get remove docker docker-engine docker.io

2. 安装docker

#step 1: 安装必要的一些系统工具
sudo apt-get update
sudo apt-get -y install apt-transport-https ca-certificates curl software-properties-common

#step 2: 安装GPG证书
curl -fsSL http://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add - 
#curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
 
#Step 3: 写入软件源信息
sudo add-apt-repository "deb [arch=amd64] http://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable"
#sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

#Step 4: 更新并安装Docker-CE
sudo apt-get -y update
sudo apt-get -y install docker-ce

另外一种安装方式

http://blog.csdn.net/change_on/article/details/76690934

二. CENTOS安装docker

1. centos6安装docker1.71很简单, 如下，但是不支持docker-compose，因为docker版本太低

yum install https://get.docker.com/rpm/1.7.1/centos-6/RPMS/x86_64/docker-engine-1.7.1-1.el6.x86_64.rpm ---这样方式安装的是docker-engine，启动的时候有时候会出错。

或者

yum install docker-io -y --还是这种方式稳些

2. 在centos6上跑docker和docker-compose

要跑docker-compose必要要求docker版本在1.9以上，官方要求docker需要运行在centos7以上，内核要3.1以上，并且现在在centos6版本上docker版本最新的只有1.7的

1）不升级内核的方法：可参考 http://blog.csdn.net/kinginblue/article/details/73527832，这个比较麻烦，没验证

2）升级内核，然后安装docker 1.9的方法：已经过验证，可行

首先升级内核，否则docker会很卡

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org  #导入public key
rpm -Uvh http://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm  #安装ELRepo到centos
yum --enablerepo=elrepo-kernel install kernel-ml -y  #安装kernel,后缀ml是最新版，lt事稳定版

vim /etc/grub.conf  修改第一行为default=0   #修改grub引导顺序，一般新安装的内核在第一个位置，设置default=0，表示启动新内核


最后重启系统即可

升级完后装docker 1.9

yum install epel-release -y
yum install docker-io -y   #安装docker1.7.1
curl -sSL -O https://get.docker.com/builds/Linux/x86_64/docker-1.9.1  #下载1.9.1，我是用香港aliyun服务器下载的，国内的好像不行

# wget -c https://get.docker.com/builds/Linux/x86_64/docker-1.10.3 下载docker-1.10版的地址，但是在6上貌似不可用

chmod +x docker-1.9.1
mv docker-1.9.1 /usr/bin/docker  #替换
service docker restart
docker version   #查看版本

3. centos7上安装docker

参考：http://blog.csdn.net/yuan_cheerleaders/article/details/51480077

Uninstall old versions

Older versions of Docker were called docker or docker-engine. If these are installed, uninstall them, along with associated dependencies.

$ 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

Install Docker CE

Install required packages. yum-utils provides the yum-config-manager utility, and device-mapper-persistent-data and lvm2 are required by the devicemapper storage driver.

$ sudo yum install -y yum-utils

device-mapper-persistent-data

lvm2

Use the following command to set up the stable repository. You always need the stable repository, even if you want to install builds from the edge or test repositories as well.

$ sudo yum-config-manager

--add-repo

https://download.docker.com/linux/centos/docker-ce.repo

Install the latest version of Docker CE

$ sudo yum install docker-ce

Start Docker.

$ sudo systemctl start docker

Verify that docker is installed correctly by running the hello-world image.

$ sudo docker run hello-world

Uninstall Docker CE

Uninstall the Docker package

$ sudo yum remove docker-ce

Images, containers, volumes, or customized configuration files on your host are not automatically removed. To delete all images, containers, and volumes