一些docker基本命令

17 April 2015

  1. 移除所有的容器和镜像

     sudo docker kill $(sudo docker ps -q)
 sudo docker rm $(sudo docker ps -a -q)
 sudo docker rmi $(sudo docker images -q -a)

  2. 检测docker镜像或者容器的基本信息

     docker inspect [--help] [-f|--format[=FORMAT]] CONTAINER|IMAGE [CONTAINER|IMAGE...]

  3. 编写Dockerfile生成image

     docker build <path>

    寻找path路径下名为的Dockerfile的配置文件，使用此配置生成新的image

  4. 保存修改的容器

     sudo docker commit -m "Added python-pip tailer" -a "Docker Newbee" 0b2616b0e5a8 myrepo/gr:v2

    其中，-m 来指定提交的说明信息，跟我们使用的版本控制工具一样；-a 可以指定更新的用户信息；之后是用来创建镜像的容器的 ID；最后指定目标镜像的仓库名和 tag 信息。创建成功后会返回这个镜像的 ID 信息。

  5. 删除所有none的镜像

     sudo docker images | grep none |awk '{print $3}'|xargs sudo docker rmi

  6. 在docker中调用docker

     sudo docker run --rm -t -i -p 8889:8889 -v /var/run/docker.sock:/var/run/docker.sock -v $(which docker):$(which docker) b0e77ef5cfd7

  7. 数据卷容器的使用

  • 创建一个数据卷容器

      sudo docker create -v /dbdata --name dbdata training/postgres /bin/true

  sudo docker run -ti --volumes-from dbdata -v /var/run/docker.sock:/var/run/docker.sock -v $(which docker):$(which docker) b0e77ef5cfd7

  sudo docker run --rm --volumes-from dbdata garland/butterfly g++ /dbdata/test.cpp -o /dbdata/test
    
  sudo docker run -t -i -p 8889:8889 --volumes-from dbdata -v /var/run/docker.sock:/var/run/docker.sock -v $(which docker):$(which docker) nikefd/tjide2

  1. 数据库连接

     sudo docker run -v ~/workplace/test/mysql:/var/lib/mysql -d --name mysql -e MYSQL_ROOT_PASSWORD=admin nikefd/mysql

 sudo docker exec -it mysql bash

 sudo docker run --rm -ti -v ~/workplace/userdata:/userdata -v /var/run/docker.sock:/var/run/docker.sock -v $(which docker):$(which docker) -v ~/workplace/graduation-project:/try --link mysql:tomysql --name tjide0 -p 8000:8888 nikefd/tjide

 sudo docker run --link tjide0:to0 --link tjide1:to1 --name nginx -p 80:80 -d nikefd/nginx

 sudo docker exec -ti nginx bash

Step 1: run the program in a docker

  1. Download the image ubuntu

     sudo docker pull ubuntu
 vi Dockerfile

  2. 编写Dockerfile文件内容如下

     FROM ubuntu:14.04

 MAINTAINER nikefd <nikefd@gmail.com>

 RUN apt-get update
 RUN apt-get install -y build-essential python python-tornado strace python-pip
 RUN pip install tailer

 WORKDIR /opt/gr
 ADD . /opt/gr

 EXPOSE 8889

 CMD ["python /opt/gr/server.py"]

    需要在服务器上设置如下

     sudo apt-get install apparmor-utils

 sudo aa-complain /etc/apparmor.d/docker
  
 sudo docker run --rm -t -i -p 8889:8889 ef6f0dc55814 /bin/bash

Step 2: communicate across link in two docker, one docker provide the gcc complier environment, the other call it

docker: relocation error: docker: symbol dm_task_get_info_with_deferred_remove, version Base not defined in file libdevmapper.so.1.02 with link time reference

报这个错误的时候，运行

yum install device-mapper-event-libs

即可。 详见: http://stackoverflow.com/questions/27216473/docker-1-3-fails-to-start-on-rhel6-5 然后重启docker服务

碰到以下问题

91c95931e552: Error pulling image (latest) from hello-world, Driver devicemapper failed to create image rootfs a8219747be10611d65b7c693f48e7222c0bf54b5df8467d3f99003611afa1fd8: Error running DeviceCreate (createSnapDevice) dm_task_run failed reate (createSnapDevice) dm_task_run failed  FATA[0022] Error pulling image (latest) from hello-world, Driver devicemapper failed to create image rootfs a8219747be10611d65b7c693f48e7222c0bf54b5df8467d3f99003611afa1fd8: Error running DeviceCreate (createSnapDevice) dm_task_run failed

解决方法： removing everything in /var/lib/docker

docker run -v /var/www/html/tjide/mysql:/var/lib/mysql -d --name mysql -e MYSQL_ROOT_PASSWORD=admin nikefd/mysql

docker run --rm -ti -v /var/www/html/tjide/userdata:/userdata -v /var/run/docker.sock:/var/run/docker.sock -v $(which docker):$(which docker) --link mysql:tomysql --name tjide0 -p 8000:8888 nikefd/tjide

参考链接： http://segmentfault.com/a/1190000000628247 https://docs.docker.com/userguide/ http://dockerpool.com/static/books/docker_practice/

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