Getting started with Docker-summary and induction of commonly used instructions

Docker directory

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Preface

• This article is a quick Dockerstart, only enumerates the dockerusage method
• If necessary, please read official documents and related books

What is Docker?

• Because the configuration environment is different, the software in the development environment may not be used if it is moved to the operation and maintenance test machine;
• The reasons for not being able to use are: environment configuration, library called, etc.;
• Three elements of Docker: warehouse, mirror, container;

Docker installation

• yum install -y epel-release
• yum install -y docker-io
• ll /etc/sysconfig/docker
• service docker start /// systemctl start docker
• docker version

View kernel version

• uname -r
• cat /etc/redhat-release

Docker architecture

• client—>Client, command terminal;
• docker_host---->Server;
• repository—>Remote warehouse;

Alibaba Cloud configuration

1. open the Web page: dev.aliyun.com/search.html
2. login
3. copy url
4. sudo mkdir -p /etc/docker
5. sudo tee /etc/docker/daemon.json <<- 'EOF' xxxxEOF
6. vim /etc/sysconfig/docker
7. other_args="--registry-mirror=https://aa25jingu.mirror.aliyuns.com"
8. service docker restart
9. sudo systemctl daemon-reload
10. sudo systemctl restart docker
11. ps -ef | grep docker

run

• docker run hello-world

docker help command

• docker version
• docker info
• docker --help

docker image command

docker images: List the mirrors on the local host

• -a: all
• -q: Show mirror id
• --digests: Summary information
• --no-trunc: Display complete mirror information
  docker search (options) [name]
• -s: List the number of collections not less than how many
• --automated: Type of automatic build
  docker pull: download mirror
  docker pull tomcat === docker pull tomcat:lastest
docker rmi [name]

Container command

• docker pull centos
• docker run [options] image [command]
  • --name: New name;
  • -d:Background process
  • -i: Interactive operation
  • -t: Assign a pseudo input terminal to the container
  • -P:Port Mapping
  • -p: Specify port mapping
• docker ps [options]: List running containers
  • -a: List all
  • -l: Recently created
  • -q: Only display the number
  • --no-trunc: Do not truncate the output
    Exit:
  • exit
  • ctrl+P+Q
• docker start [id / name]
• docker restart [id / name]
• docker stop [id / name]
• docker kill [id / name]
• docker rm [id]
• docker rm -f ${docker ps -a -q}
• docker ps -a -q | xargs docker rm
• docker logs -f -t --tail
• docker top
• docker inspect [id]: View the internal details of the container;
• docker exec -t [id] ls -l: Perform command operations outside of docker
• docker cp [id]: Destination host path of the path in the container
• docker attach 【id】: Connect to the running container.

Mirror commit

• docker commit -m="message" -a="author" [id] [name]:tag
• docker psThe container container after id=run ( ), not docker images
• docker run -it -p 8888:8080 tomcat
• docker run -it -P tomcat

Start in the background

docker run -d -p 6666:8080 tomcat

Container data volume

• docker run -it -v [宿主机绝对路径目录：容器内目录] 镜像名
• docker run -it -v [宿主机绝对路径目录：容器内目录]:ro 镜像名
  • The host can be written, but the docker image can only be viewed
• The original intention is: data conversion;

Data volume container

• Active hard disk hanging active hard disk, to achieve data transfer dependence;
• docker run -it --name dc01 zzyy/centos
• docker run -it --name dc02 --volumes-from dc01 zzyy/centos
  • Creating files in the same folder will achieve the effect of file sharing
• docker rm -f dc01
  • When 2, 3 inherits 1, delete 1 and it does not affect 2, 3;
• The transfer of configuration information between containers, the life cycle of the data volume continues until there is no container in use;
• DockerFile>Docker Image>Docker run

DockerFileReserved word instruction

• FROM
• MAINTAINER
• RUN
• EXPOSE
• WORKDIR
• ENV
• ADD
• COPY
• VOLUME
• CMD
• ENTRYPOINT
• ONBUILD

FROM centos
- MAINAINER fwx<[email protected]>
#当前宿主机拷贝到容器目录下（/usr/local/）
COPY xx.txt /usr/local/xx.txt
#压缩文件添加并解压到容器里
ADD xx.tar.gz /usr/local
#安装tool
RUN yum -y install vim
#设置工作路径
ENV WORKPATH /usr/local
WORKDIR $WORKPATH
#启动时运行
CMD ll [只能执行最后一个，不能重叠.出现多个前面失效]
ENTRYPOINT ['ls', '-s']

Excuting an order

docker run -d -p 9080:8080 --name xx -v /usr/local:/tmp --privileged=true xx-name