how to install docker on centos 6

# docker install on centos 6

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## how-to-install-docker-on-centos-6

docker-engine-1.7.1-1.el6.x86_64.rpm has done.

docker centos 6
Docker.io 是轻量级的“容器引擎+映像仓库”

可执行程序，“/usr/bin/docker”
docker.io网站上有一系列创建好的操作系统和应用程序映像
AUFS（另一个统一文件系统）来实现文件系统的快照，文件变化，控制只读或读写的需求。
LXC（Linux轻量级容器）
Cgroups（各种资源和命名空间的管理）
Check.

As of June 2014 Docker has officially released v1.0.0.
These instructions are intended for installing Docker.
I’ll be working from a Liquid Web Core Managed CentOS 6.5 server, and I’ll be logged in as root.

# rpm -iUvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

## close selinux

```python
        # getenforce
        enforcing
        # setenforce 0
        permissive

```
    # vi /etc/selinux/config

## kernel update

```python
        Kernel 升级到3.10.x版本
```

## repo

```bash
[doockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/
enabled=1
gpgcheck=1
pgkey=https://yum.dockerproject.org/gpg
```

# wget http://dev.52opn.com/yum/kernel/kernel-ml-aufs-3.10.5-12.1.x86_64.rpm
    # wget http://dev.52opn.com/yum/kernel/kernel-ml-aufs-devel-3.10.5-12.1.x86_64.rpm

Then, as a matter of best practice, we’ll update our packages:

# yum update -y

ok:
    # wget https://yum.dockerproject.org/repo/main/centos/6/Packages/docker-engine-1.7.1-1.el6.x86_64.rpm
    
    # yum localinstll docker-engine-1.7.1-1.el6.x86_64.rpm

## Installation

Now let’s install Docker by installing the docker-io package: CentOS-6上docker的安装包叫docker-io，并且来源于Fedora epel库

# yum -y install docker-io

Once the installation completes, we’ll need to start the Docker daemon:

# service docker start

And finally, and optionally, let’s configure Docker to start when the server boots:

# chkconfig docker on

There are many community containers already available, which can be found through a search. In the command below I am searching for the keyword centos:

# docker search centos

## Download 
a Docker Container Let’s begin using Docker! Download the centos Docker image:

# docker pull centos

## Run
a Docker Container Now, to setup a basic centos container with a bash shell, we just run one command. docker run will run a command in a new container, -i attaches stdin and stdout, -t allocates a tty, and we’re using the standard fedora container.

# docker run -i -t centos /bin/bash

That’s it! You’re now using a bash shell inside of a centos docker container. To disconnect, or detach, from the shell without exiting use the escape sequence Ctrl-p + Ctrl-q.

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