1.Docker all the commands
2. Help command
docker version 查看docker版本
docker info 显示全系统信息
docker --help 显示docker相关的所有命令及功能说明
3. Mirror command
3.1 docker images on the image list of the machine
REPOSITORY：表示镜像的仓库源
TAG：镜像的标签
IMAGE ID：镜像ID
CREATED：镜像创建时间
SIZE：镜像大小
The same warehouse source can have multiple TAG, on behalf of the warehouse source different versions, we use REPOSITORY: TAG to define different image.
If you do not specify a mirrored version of the label, for example, you only use ubuntu, docker will default ubuntu: latest image
docker images - [options] description
-a 列表本地的所有镜像及子镜像
-q 只显示镜像ID
--digests 显示镜像的摘要信息
--no-trunc 显示完整的镜像信息
3.2 docker seach image search command
If impossible, to put a mirror to accelerate into the cloud Ali
Search the site: https: //hub.docker.com
grammar
docker search 镜像名称
docker search 镜像名称 -[options] 说明
--no-trunc 显示完整的镜像描述
-s 列出收藏数不少于指定值的镜像
Docker search mysql -s 300
3.3 docker pull mirror download command
grammar
docker pull 镜像名称:[TAG]
例如:docker pull tomcat:8.5 下载8.5的镜像版本
dokcer pull tomcat 默认下载最新的tomcat镜像版本 【latest】
3.4 docker rim mirror delete command
删除单个 docker rmi -f 镜像ID
删除多个 docker rmi -f 镜像ID1 镜像ID2
docker rmi -f 镜像名:[tag] 镜像名:[tag]
删除全部 docker rmi -f $(docker images -qa)
4. Overview of the container and command
4.1 Overview of container
Mirroring is a lightweight container stand-alone executable software package contains everything required to run it: the code, run-time, system tools, system libraries, settings. Regardless of the environment, containers of the same software can run Linux and Windows applications. The software container isolated from its surroundings, the differences between development and production environments, for example, and help reduce conflict between team running different software on the same infrastructure.
1. Lightweight
Docker containers running on a single machine share the machine operating system kernel; and they immediately start to use less memory and calculation. The image constructed by the file system layer, and share common files. This minimizes disk usage, image download faster.
2. Standard
Docker containers based on open standards, runs on all major Linux distributions, Microsoft Windows and any infrastructure (including virtual machines, cloud and bare metal).
3. Security
Docker containers isolating applications from each other and separated from the underlying infrastructure. Docker provides the most powerful default isolation, may limit the application issues in a container, rather than on the entire machine.
4.2 demo premise
There are mirrors to create the container, this is the fundamental requirement (download centos mirror to demonstrate)
docker pull centos
Container and start to create 4.3
4.3.1 Syntax
docker run [options] images [command][args]
4.3.2options Description
Some are a minus, minus some two
-name = "container for the new name": Specify a name for the container;
-d: background container, and returns the container ID, or start the daemon i.e. container;
-i: Run vessel in interactive mode, typically used in conjunction with -t;
-t: reassign a pseudo input terminal into a container, normally used in conjunction with -i;
-P: random port mapping;
-p: Specifies the port mapping, the following four formats
ip:hostPort:containerPort
ip::containerPort
hostPort:containerPort
containerPort
4.3.3 Interactive run
A container terminal is running and to open the container
#使用镜像centos:latest以交互模式启动一个容器,在容器内执行/bin/bash命令。
docker run -it centos /bin/bash
4.4 lists all currently running container
4.4.1 Syntax
docker ps [options]
docker ps 列出当前正在运行的容器
4.4.2 options Syntax
-a: lists all currently running container + run-off in history
-l: display container recently created.
-n: display the last n-created container.
-q: Silent mode, only the container number.
-no-trunc: do not cut output.
4.5 Exit container
1, exit: stop the container and exit
2, ctrl + P + Q to exit the container does not stop
4.6 Start Stop Restart container
docker start / stop / restart ID container or container name
4.7 forcibly stop the container
docker kill ID container or container name
4.8 Delete stopped container
#单个删除
docker rm 容器ID
#多个删除
docker rm -f $(docker ps -aq)
5. Other Highlights
5.1 Enabling guard vessel
# Mirroring centos: latest stage after a start mode vessel
docker run -d centos
Question: docker ps -a view, will find that the container has withdrawn
A very important point to note: Docker container running in the background, there must be a foreground process.
If not, run the command vessel has been suspended those commands (such as running top, tail), it is automatically quit.
This is a docker mechanisms, such as your web container, we nginx for example, under normal circumstances, we just need to start to start the service configuration is to be of service. For example, service nginx start
However, to do so, nginx runs as a background process mode, it causes the application is not running in the foreground docker,
After such containers into the background, it will immediately commit suicide because he felt he nothing to do up.
So, the best solution is to run a background process of program you want to run before
to sum up
The vessel must have run a foreground process, not, equivalent container said they were not to do, committed suicide, but when the user starts the tomcat, is not used for a long time, why not hang tomcat
-
There are projects that are running - not established
If I webapps empty. Start docker container. It also does not quit
-
Tomcat start because there will always be a terminal pending
5.2 View container logs
If the program is running in the background, then how to view the log run it?
1, a first program running in the background is output two seconds interval [hello laolei]
docker run -d centos /bin/sh -c "while true;do echo hello laolei;sleep 2;done"
2, View Log
Docker logs to see inside the container logs
docker logs -tf --tail 10 容器ID
* -t 是加入时间戳
* -f 跟随最新的日志打印
* --tail 数字 显示最后多少条
5.3 View running processes container
docker top 容器ID
5.4 Query internal details of the container
docker inspect 容器ID
5.5-going vessel to enter and interact with the command line
#方式1
docker exec -it 容器ID /bin/bash
#方式2
docker attach 容器ID
#两种方式的区别
exec 在容器中打开新的终端 并且可以启动新的进程
attch 直接进行容器终端，不会启动新的进程
5.6 into the container copy files to the host
docker cp container ID: directory path to the host in the container
6. Video Address
https://ke.qq.com/course/469242?taid=3997450616908026&tuin=21f98a63
ps: For the latest free documentation and instructional videos, please add QQ group (627,407,545) receive.
