详解Centos6.5下docker 环境搭建
<p><strong>一.运行docker Linux内核版本需要在3.8以上,针对centos6.5 内核为2.6的系统需要先升级内核.不然会特别卡，退出容器.</strong></p>
<p>
在yum的ELRepo源中,有mainline（3.13.1）、long-term（3.10.28）这2个内核版本，考虑到long-term更稳定，会长期更新，所以选择这个版本。</p>
<p>
1.查看当前版本：</p>
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<code class="bash plain"></code><code class="bash comments"># more /etc/issue</code>
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<code class="bash plain">CentOS release 6.5 (Final)</code>
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<code class="bash plain">Kernel \r on an \m</code>
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<code class="bash plain"></code><code class="bash comments"># uname -a</code>
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<code class="bash plain">Linux localhost.localdomain 2.6.32-431.el6.x86_64 </code><code class="bash comments">#1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux</code>
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2.升级内核至3.10.28</p>
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1.>导入public key</p>
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<code class="bash plain">rpm --</code><code class="bash functions">import</code> <code class="bash plain">https:</code><code class="bash plain">//www</code><code class="bash plain">.elrepo.org</code><code class="bash plain">/RPM-GPG-KEY-elrepo</code><code class="bash plain">.org</code>
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2.>安装ELRepo到CentOS-6.5中</p>
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<code class="bash plain">rpm -ivh http:</code><code class="bash plain">//www</code><code class="bash plain">.elrepo.org</code><code class="bash plain">/elrepo-release-6-5</code><code class="bash plain">.el6.elrepo.noarch.rpm</code>
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3.>安装**kernel-lt（lt=long-term）**</p>
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<code class="bash plain">yum --enablerepo=elrepo-kernel </code><code class="bash functions">install</code> <code class="bash plain">kernel-lt -y</code>
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或者安装kernel-ml（ml=mainline）</p>
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<code class="bash plain">yum --enablerepo=elrepo-kernel </code><code class="bash functions">install</code> <code class="bash plain">kernel-ml -y</code>
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4.>编辑grub.conf文件，修改Grub引导顺序</p>
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<code class="bash plain">vim </code><code class="bash plain">/etc/grub</code><code class="bash plain">.conf</code>
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<code class="bash comments"># grub.conf generated by anaconda</code>
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<code class="bash comments">#</code>
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<code class="bash plain">default=0</code>
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<code class="bash plain">timeout=5</code>
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<code class="bash plain">splashimage=(hd0,0)</code><code class="bash plain">/boot/grub/splash</code><code class="bash plain">.xpm.gz</code>
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<code class="bash plain">hiddenmenu</code>
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<code class="bash plain">title CentOS (3.10.28-1.el6.elrepo.x86_64)</code>
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<code class="bash spaces"> </code><code class="bash plain">root (hd0,0)</code>
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<code class="bash spaces"> </code><code class="bash plain">kernel </code><code class="bash plain">/boot/vmlinuz-3</code><code class="bash plain">.10.28-1.el6.elrepo.x86_64 ro root=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto.UTF-8 rd_NO_LVM rd_NO_DM rhgb quiet</code>
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<code class="bash spaces"> </code><code class="bash plain">initrd </code><code class="bash plain">/boot/initramfs-3</code><code class="bash plain">.10.28-1.el6.elrepo.x86_64.img</code>
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<code class="bash plain">title CentOS (2.6.32-431.3.1.el6.x86_64)</code>
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<code class="bash spaces"> </code><code class="bash plain">root (hd0,0)</code>
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<code class="bash spaces"> </code><code class="bash plain">kernel </code><code class="bash plain">/boot/vmlinuz-2</code><code class="bash plain">.6.32-431.3.1.el6.x86_64 ro root=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto.UTF-8 rd_NO_LVM rd_NO_DM rhgb quiet</code>
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<code class="bash spaces"> </code><code class="bash plain">initrd </code><code class="bash plain">/boot/initramfs-2</code><code class="bash plain">.6.32-431.3.1.el6.x86_64.img</code>
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确认刚安装好的内核在哪个位置，然后设置default值（从0开始），一般新安装的内核在第一个位置，所以设置default=0</p>
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5.>重启，查看内核版本号.</p>
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<code class="bash plain"></code><code class="bash comments"># reboot</code>
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<code class="bash plain"></code><code class="bash comments"># uname -r</code>
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<code class="bash plain">3.10.104-1.el6.elrepo.x86_64</code>
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至此，CentOS6.5的内核升级完成，下面就可以安装docker了.</p>
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<strong>二.安装docker</strong></p>
<p>
直接使用命令: yum install docker-io 是会报错的!!! 提示:No package docker-io available.</p>
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需要先安装yum 源.</p>
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<code class="bash plain">yum -y </code><code class="bash functions">install</code> <code class="bash plain">http:</code><code class="bash plain">//dl</code><code class="bash plain">.fedoraproject.org</code><code class="bash plain">/pub/epel/6/x86_64/epel-release-6-8</code><code class="bash plain">.noarch.rpm</code>
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再执行</p>
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<code class="bash plain">yum </code><code class="bash functions">install</code> <code class="bash plain">docker-io</code>
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就可以正常安装了!!</p>
<p>
在安装的过程中由于dns的问题报了错，所以要设置好自己的dns确保服务器能连接到外网，我当时设置的dns为：</p>
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<code class="bash plain">vim </code><code class="bash plain">/etc/resolv</code><code class="bash plain">.conf </code>
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<code class="bash plain">nameserver 8.8.8.8</code>
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<code class="bash plain">nameserver 8.8.4.4</code>
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启动docker</p>
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<code class="bash plain">service docker start</code>
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查看docker版本：</p>
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<code class="bash plain"></code><code class="bash comments"># docker version</code>
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<code class="bash plain">Client version: 1.7.1</code>
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<code class="bash plain">Client API version: 1.19</code>
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<code class="bash plain">Go version (client): go1.4.2</code>
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<code class="bash plain">Git commit (client): 786b29d</code><code class="bash plain">/1</code><code class="bash plain">.7.1</code>
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<code class="bash plain">OS</code><code class="bash plain">/Arch</code> <code class="bash plain">(client): linux</code><code class="bash plain">/amd64</code>
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<code class="bash plain">Server version: 1.7.1</code>
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<code class="bash plain">Server API version: 1.19</code>
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<code class="bash plain">Go version (server): go1.4.2</code>
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<code class="bash plain">Git commit (server): 786b29d</code><code class="bash plain">/1</code><code class="bash plain">.7.1</code>
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<code class="bash plain">OS</code><code class="bash plain">/Arch</code> <code class="bash plain">(server): linux</code><code class="bash plain">/amd64</code>
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查看docker日志.</p>
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<code class="bash functions">cat</code> <code class="bash plain">/var/log/docker</code>
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至此，docker安装完成！！！</p>
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<strong>三、卸载docker</strong></p>
<p>
列出你安装过的包</p>
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<code class="bash plain"></code><code class="bash comments"># yum list installed | grep docker</code>
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<code class="bash plain">docker-io.x86_64 1.7.1-2.el6 @epel</code>
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删除软件包</p>
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<code class="bash plain">yum -y remove docker-io.x86_64</code>
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删除镜像/容器等</p>
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<code class="bash functions">rm</code> <code class="bash plain">-rf </code><code class="bash plain">/var/lib/docker</code>
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<strong>四、升级docker版本为1.10.3</strong></p>
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升级之前停止docker服务,并将原有的docker服务进行备份. mv /usr/bin/docker /usr/bin/docker.bak</p>
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</p>
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<span><u>复制代码</u></span> 代码如下:</div>
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nohup wget -c https://get.docker.com/builds/Linux/x86_64/docker-1.10.3 -O /usr/bin/docker</div>
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给执行权限：chmod 755 /usr/bin/docker 然后重启服务，并查看版本.</p>
<p>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。</p>
<p>
原文链接：http://www.cnblogs.com/saneri/p/6178536.html</p>
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