https://blog.mulinux.com/en/tags/docker/ Mulinux - Linux Operations & DevOps blog. Notes on Linux, Kubernetes, Docker and backend engineering. Hugo 0.160.0 & FixIt v0.4.5 en Tue, 16 Oct 2018 17:39:00 +0800 https://blog.mulinux.com/en/docker-image/ Tue, 16 Oct 2018 17:39:00 +0800 https://blog.mulinux.com/en/docker-image/ Operations <h2 class="heading-element" id="install-docker"><span>Install Docker</span> <a href="#install-docker" class="heading-mark"> <svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg> </a> </h2><pre><code>Centos6.6_x64 [root@web1 ~]# uname -a Linux web1.mulinux.com 2.6.32-504.el6.x86_64 #1 SMP Wed Oct 15 04:27:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux [root@web1 ~]# yum install -y epel-release [root@web1 ~]# yum install -y docker-io [root@web1 ~]# /etc/init.d/docker start [root@web1 ~]# ps aux | grep docker root 1591 1.0 1.4 287656 14224 pts/0 Sl 18:30 0:00 /usr/bin/docker -d root 1709 0.0 0.0 103244 864 pts/0 S&#43; 18:31 0:00 grep docker</code></pre><h2 class="heading-element" id="image-management"><span>Image Management</span> <a href="#image-management" class="heading-mark"> <svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg> </a> </h2><pre><code>[root@web1 ~]# docker pull centos latest: Pulling from centos 47d44cb6f252: Pull complete 6fdebd7b0eb5: Pull complete a63aae4d216f: Pull complete bb3d629a7cbc: Pull complete Digest: sha256:381f21e4c7b3724c6f420b2bcfa6e13e47ed155192869a2a04fa10f944c78476 Status: Downloaded newer image for centos:latest [root@web1 ~]# docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE centos latest bb3d629a7cbc 2 weeks ago 196.6 MB [root@web1 ~]# docker tag centos mulinux123 [root@web1 ~]# docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE centos latest bb3d629a7cbc 2 weeks ago 196.6 MB mulinux123 latest bb3d629a7cbc 2 weeks ago 196.6 MB [root@web1 ~]# docker run -it centos /bin/bash #start a container from image [root@32c67b2b18e0 /]# w 12:30:01 up 2:09, 0 users, load average: 0.06, 0.01, 0.00 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT [root@32c67b2b18e0 /]# exit exit [root@web1 ~]# docker ps #list running containers [root@web1 ~]# docker ps -a #list all containers including stopped CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 32c67b2b18e0 centos &#34;/bin/bash&#34; 2 minutes ago Exited (0) About a minute ago modest_kowalevski [root@web1 ~]# docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE centos latest bb3d629a7cbc 2 weeks ago 196.6 MB mulinux123 latest bb3d629a7cbc 2 weeks ago 196.6 MB [root@web1 ~]# docker rmi bb3d629a7cbc #deleting by ID removes all images with same ID [root@web1 ~]# docker rmi mulinux123 Untagged: mulinux123:latest [root@web1 ~]# docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE centos latest bb3d629a7cbc 2 weeks ago 196.6 MB [root@web1 ~]# docker tag centos centos:mulinux [root@web1 ~]# docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE centos latest bb3d629a7cbc 2 weeks ago 196.6 MB centos mulinux bb3d629a7cbc 2 weeks ago 196.6 MB [root@web1 ~]# docker rmi centos:mulinux Untagged: centos:mulinux [root@web1 ~]# docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE centos latest bb3d629a7cbc 2 weeks ago 196.6 MB</code></pre>