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docker是什么就不多说了，见docker基础原理介绍。 1. 禁用selinux# getenforce enforcing # setenforce 0 permissive # vi /etc/selinux/config SELINUX=disabled ... 2. 安装 Fedora EPELepel-release-6-8.noarch.rpm包在发行版的介质里面已经自带了，可以从rpm安装。 # yum install epel-release-6-8.noarch.rpm //或 yum -y install http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
如果出现GPG key retrieval failed: [Errno 14] Could not open/read file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6问题，请在线安装epel，下载RPM-GPG-KEY-EPEL-6文件。 3. 检查内核版本# uname -r 2.6.32-431.el6.x86_64 # cat /etc/redhat-release CentOS release 6.5 (Final)
看到这个最低的内核版本，事实运行起来是没太大问题的，你也可以升级到3.10.x版本。
[root@sean ~]# ./check-config
warning: /proc/config.gz does not exist, searching other paths for kernel config...
info: reading kernel config from /boot/config-2.6.32-431.el6.x86_64 ...
Generally Necessary:
- cgroup hierarchy: properly mounted [/cgroup]
- CONFIG_NAMESPACES: enabled
- CONFIG_NET_NS: enabled
- CONFIG_PID_NS: enabled
- CONFIG_IPC_NS: enabled
- CONFIG_UTS_NS: enabled
- CONFIG_DEVPTS_MULTIPLE_INSTANCES: enabled
- CONFIG_CGROUPS: enabled
- CONFIG_CGROUP_CPUACCT: enabled
- CONFIG_CGROUP_DEVICE: enabled
- CONFIG_CGROUP_FREEZER: enabled
- CONFIG_CGROUP_SCHED: enabled
- CONFIG_MACVLAN: enabled
- CONFIG_VETH: enabled
- CONFIG_BRIDGE: enabled
- CONFIG_NF_NAT_IPV4: missing
- CONFIG_IP_NF_TARGET_MASQUERADE: enabled
- CONFIG_NETFILTER_XT_MATCH_ADDRTYPE: missing
- CONFIG_NETFILTER_XT_MATCH_CONNTRACK: enabled
- CONFIG_NF_NAT: enabled
- CONFIG_NF_NAT_NEEDED: enabled
Optional Features:
- CONFIG_MEMCG_SWAP: missing
- CONFIG_RESOURCE_COUNTERS: enabled
- CONFIG_CGROUP_PERF: enabled
- Storage Drivers:
- "aufs":
- CONFIG_AUFS_FS: missing
- CONFIG_EXT4_FS_POSIX_ACL: enabled
- CONFIG_EXT4_FS_SECURITY: enabled
- "btrfs":
- CONFIG_BTRFS_FS: enabled
- "devicemapper":
- CONFIG_BLK_DEV_DM: enabled
- CONFIG_DM_THIN_PROVISIONING: enabled
- CONFIG_EXT4_FS: enabled
- CONFIG_EXT4_FS_POSIX_ACL: enabled
- CONFIG_EXT4_FS_SECURITY: enabled
假如你是自己编译内核，请特别留意几个绝对不能缺少的：DM_THIN_PROVISIONING、IP_NF_TARGET_MASQUERADE、NF_NAT。（AUFS_FS没有对应选项，还不清楚怎么回事，但不是必须） 4. 安装 docker-io# yum install docker-io Dependencies Resolved =========================================================================================== Package Arch Version Repository Size =========================================================================================== Installing: docker-io x86_64 1.1.2-1.el6 epel 4.5 M Installing for dependencies: lua-alt-getopt noarch 0.7.0-1.el6 epel 6.9 k lua-filesystem x86_64 1.4.2-1.el6 epel 24 k lua-lxc x86_64 1.0.6-1.el6 epel 15 k lxc x86_64 1.0.6-1.el6 epel 120 k lxc-libs x86_64 1.0.6-1.el6 epel 248 k Transaction Summary =========================================================================================== Install 6 Package(s) 许多文档介绍到这里，下一步为挂载/cgroup文件系统，我的docker版本为1.1.2，没有修改/etc/fstab的步骤。 5. 启动试运行# service docker start //或 # docker -d 6. 异常
在我的一次安装过程中，很不幸遇到下面的问题： [f32e7d9f] +job initserver() [f32e7d9f.initserver()] Creating server [f32e7d9f] +job serveapi(unix:///var/run/docker.sock) 2014/10/22 13:02:45 Listening for HTTP on unix (/var/run/docker.sock) Error running DeviceCreate (createPool) dm_task_run failed [f32e7d9f] -job initserver() = ERR (1) 2014/10/22 13:02:45 Error running DeviceCreate (createPool) dm_task_run failed \nWed Oct 22 14:35:54 CST 2014\n 再或者是service docker restart Stopping docker: [ OK ] Starting cgconfig service: Error: cannot mount cpuset to /cgroup/cpuset: Device or resource busy /sbin/cgconfigparser; error loading /etc/cgconfig.conf: Cgroup mounting failed Failed to parse /etc/cgconfig.conf [FAILED] Starting docker: [ OK ] Unable to enable network bridge NAT: iptables failed: iptables -I POSTROUTING -t nat -s 172.17.42.1/16 ! -d 172.17.42.1/16 -j MASQUERADE: iptables v1.4.7: can't initialize iptables table `nat': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded. 上面的三个异常都是由于内核模块的缺失导致的，这也是自己编译内核来升级带来的风险，于是就有了sciurus的kernel-ml-aufs的rpm包（见参考的第一个链接）。 7. 参考
原文链接地址：http://seanlook.com/2014/10/26/docker-installed-centos6-successfully/ (责任编辑：IT) |