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首页 / 操作系统 / Linux / 在 CentOS 6.4(64位) 安装 docker.io

Docker.io 是轻量级的“容器引擎+映像仓库”,在LXC(linux轻量级容器)的基础上构建,可以运行任何应用程序。docker.io的核心层由以下几个部分组成:1、可执行程序,“/usr/bin/docker”2、docker.io网站上有一系列创建好的操作系统和应用程序映像3、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。4、LXC(Linux轻量级容器)5、Cgroups(各种资源和命名空间的管理)在本文写作的时候,最新版本是0.5.3,但目前开发很活跃,一些功能和特性可能在新版本中会发生变化。按下面的步骤安装docker.io:0、安装CentOS6.x1、因为selinux和LXC有冲突,所以需要禁用[root@localhost ~]# cat /etc/selinux/config # This file controls the state of SELinux on the system.# SELINUX= can take one of these three values:# enforcing - SELinux security policy is enforced.# permissive - SELinux prints warnings instead of enforcing.# disabled - SELinux is fully disabled.SELINUX=disabled# SELINUXTYPE= type of policy in use. Possible values are:# targeted - Only targeted network daemons are protected.# strict - Full SELinux protection.SELINUXTYPE=targeted 2、配置Fedora EPEL 源 sudo yum install http://ftp.riken.jp/Linux/Fedora/epel/6/i386/epel-release-6-8.noarch.rpm 3、配置hop5.in源 cd /etc/yum.repos.dsudo wget http://www.hop5.in/yum/el6/hop5.repo 4、安装docker-io [root@localhost ~]# yum install docker-ioLoaded plugins: fastestmirror, securityLoading mirror speeds from cached hostfile * base: centos.excellmedia.net * epel: kartolo.sby.datautama.net.id * extras: centos.excellmedia.net * updates: centos.excellmedia.netSetting up Install ProcessResolving Dependencies--> Running transaction check---> Package docker-io.x86_64 0:0.5.3-4.el6 will be installed--> Processing Dependency: lxc >= 0.8.0 for package: docker-io-0.5.3-4.el6.x86_64--> Processing Dependency: kernel-ml-aufs >= 3.10.5 for package: docker-io-0.5.3-4.el6.x86_64--> Running transaction check---> Package kernel-ml-aufs.x86_64 0:3.10.5-3.el6 will be installed---> Package lxc.x86_64 0:0.8.0-3.el6 will be installed--> Processing Dependency: liblxc.so.0()(64bit) for package: lxc-0.8.0-3.el6.x86_64--> Running transaction check---> Package lxc-libs.x86_64 0:0.8.0-3.el6 will be installed--> Finished Dependency ResolutionDependencies Resolved============================================================================================ Package ArchVersionRepository Size============================================================================================Installing: docker-io x86_640.5.3-4.el6hop51.2 MInstalling for dependencies: kernel-ml-aufsx86_643.10.5-3.el6 hop5 33 M lxc x86_640.8.0-3.el6hop5 81 k lxc-libsx86_640.8.0-3.el6hop5 75 kTransaction Summary============================================================================================Install 4 Package(s)Total download size: 34 MInstalled size: 159 MIs this ok [y/N]: yDownloading Packages:(1/4): docker-io-0.5.3-4.el6.x86_64.rpm| 1.2 MB 00:03 (2/4): kernel-ml-aufs-3.10.5-3.el6.x86_64.rpm|33 MB 00:33 (3/4): lxc-0.8.0-3.el6.x86_64.rpm|81 kB 00:00 (4/4): lxc-libs-0.8.0-3.el6.x86_64.rpm |75 kB 00:00 --------------------------------------------------------------------------------------------Total 896 kB/s |34 MB 00:39 Running rpm_check_debugRunning Transaction TestTransaction Test SucceededRunning TransactionInstalling : lxc-libs-0.8.0-3.el6.x86_641/4 Installing : lxc-0.8.0-3.el6.x86_64 2/4 Installing : kernel-ml-aufs-3.10.5-3.el6.x86_64 3/4 Installing : docker-io-0.5.3-4.el6.x86_64 4/4 Verifying: kernel-ml-aufs-3.10.5-3.el6.x86_64 1/4 Verifying: lxc-0.8.0-3.el6.x86_64 2/4 Verifying: lxc-libs-0.8.0-3.el6.x86_643/4 Verifying: docker-io-0.5.3-4.el6.x86_64 4/4 Installed:docker-io.x86_64 0:0.5.3-4.el6Dependency Installed:kernel-ml-aufs.x86_64 0:3.10.5-3.el6 lxc.x86_64 0:0.8.0-3.el6lxc-libs.x86_64 0:0.8.0-3.el6 Complete![root@localhost ~]# 5、检查安装情况 [root@localhost ~]# docker -hUsage of docker:-D=false: Debug mode-H=[unix:///var/run/docker.sock]: tcp://host:port to bind/connect to or unix://path/to/socket to use-api-enable-cors=false: Enable CORS requests in the remote api.-b="": Attach containers to a pre-existing network bridge. Use "none" to disable container networking-d=false: Daemon mode-dns="": Set custom dns servers-g="/var/lib/docker": Path to graph storage base dir.-p="/var/run/docker.pid": File containing process PID-r=false: Restart previously running containers 6、要想docker正常运行还需要在/etc/fstab里增加cgroup文件系统 [root@localhost ~]# echo "none/sys/fs/cgroupcgroupdefaults0 0" >> /etc/fstab [root@localhost ~]# mount /sys/fs/cgroup 只有重新启动才能挂载/sys/fs/cgroup(因为当前运行的内核不支持cgroup),所以上面挂载的命令也可以不执行,但系统需要重新启动。相关阅读:Linux容器技术-LXC相关技术知识介绍 http://www.linuxidc.com/Linux/2012-07/66523.htmLinux容器技术-LXC创建虚拟机的执行过程分析 http://www.linuxidc.com/Linux/2012-07/66522.htm利用shell脚本监控LXC应用容器内的应用 http://www.linuxidc.com/Linux/2012-07/64525.htmCgroup和LXC(Linux container)安装详解(CentOS 6.2) 系统 http://www.linuxidc.com/Linux/2012-02/55420.htmLinux容器虚拟技术LXC简明手册 http://www.linuxidc.com/Linux/2011-06/37349.htm
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