1、使用 apt-get

# Add the Docker repository key to your local keychain

复制代码代码如下:sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9
# Add the Docker repository to your apt sources list.

复制代码代码如下:sudo sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list"
# update your sources list

复制代码代码如下:sudo apt-get update
# install the latest

复制代码代码如下:sudo apt-get install lxc-docker

2、手工安装

# kill the running docker daemon

复制代码代码如下:killall docker

# get the latest binary

复制代码代码如下:wget http://get.docker.io/builds/Linux/x86_64/docker-latest -O docker
# make it executable

复制代码代码如下:chmod +x docker

# start the new version -d是指以守护进程的方式执行， & 指在后台执行

复制代码代码如下:sudo ./docker -d &

升级的一次实际操作记录：
# docker ps 查看运行中的docker容器进程

复制代码代码如下:[root@AY140716133600881bf5Z ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS S
2901c1a54ec1 csphere/registry-v2:latest "/bin/registry-start 2 days ago Up 37 hours 0.0.0.0:4
e6b677c7ea75 csphere/csphere:0.11.2 "/bin/csphere-init - 2 weeks ago Up 37 hours 8086/tcp,
ac72d59f36e1 csphere/csphere:0.11.2 "/bin/csphere-init - 2 weeks ago Up 37 hours
a12cf20d6e65 registry.wpython.com:5000/library/nginx:1.4.7 "/usr/bin/supervisor 2 weeks ago Up 37 hours 22/tcp, 0
1b926cc81862 registry.wpython.com:5000/library/php:5.6.9 "/usr/bin/supervisor 2 weeks ago Up 37 hours 22/tcp, 9
8e44f1761417 registry.wpython.com:5000/library/mysql:5.5.37 "/usr/bin/supervisor 2 weeks ago Up 37 hours 22/tcp, 3

# 停止docker容器进程

复制代码代码如下:docker stop 2901c1a54ec1
......
......
......

# 停止docker服务

复制代码代码如下:/etc/init.d/docker stop

# 下载最新的二进制文件

复制代码代码如下:sudo wget https://get.docker.com/builds/Linux/x86_64/docker-latest -O /usr/bin/docker && chmod +x /usr/bin/docker
# 启动docker服务

复制代码代码如下:/etc/init.d/docker start
# 查看docker版本

复制代码代码如下:# docker version
Client version: 1.7.0
Client API version: 1.19
Go version (client): go1.4.2
Git commit (client): 0baf609
OS/Arch (client): linux/amd64
Server version: 1.7.0
Server API version: 1.19
Go version (server): go1.4.2
Git commit (server): 0baf609
OS/Arch (server): linux/amd64