1、使用 apt-get

# Add the Docker repository key to your local keychain

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9

# Add the Docker repository to your apt sources list.

sudo sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list"

# update your sources list

sudo apt-get update

# install the latest

sudo apt-get install lxc-docker

2、手工安装

# kill the running docker daemon

killall docker

# get the latest binary

wget http://get.docker.io/builds/Linux/x86_64/docker-latest -O docker

# make it executable

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

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

[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

docker stop 2901c1a54ec1

......

......

......

# 停止docker服务

/etc/init.d/docker stop

# 下载最新的二进制文件

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

/etc/init.d/docker start

# 查看docker版本

# 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