Docker basic commands and use

Docker basic commands

systemctl start docker : Start Docker

systemctl stop docker : Stop Docker

systemctl restart docker : Restart Docker

systemctl enable docker : Boot Docker

docker info : View summary information Docker

docker --help : View Docker help documentation

docker version : View version information Docker

Docker mirrored basic commands

. 1, docker imagesor docker image ls: List all the unit image

Optional parameters options

Optional parameters	Parameter Description
-a	All mirrored (including the intermediate layer)
-q	Show only mirrored Id
-qa	It can be used in combination
--digests	Mirror can display summary information
--no-trunc	You can display the full image information

2 docker search: Search Mirror

Optional parameters options

Optional parameters	Parameter Description
--no-trunc	Full description of the image display
-s	Lists the number of collection mirror is not less than the specified value
--automated	Lists only mirror type automatic construction Docker Hub

docker pull : Pulling mirroring

dockers pull mirroring Name:

Note: Do not add TAG, the default download the latest version of the latest

3 docker rmi: Remove Mirror

To delete a single

docker rmi 镜像名称:[TAG]  如果不写 TAG 则默认删除最新版 latest

There mirror container generated at run time, it will delete fails, we need to add -f Forces deletion

[root@iZbp17khuqdfkef3nl1db3Z ~]# docker rmi rabbitmq
Error response from daemon: conflict: unable to remove repository reference "rabbitmq" (must force) - container 99693943e972 is using its referenced image 84bc4895f175

docker rmi -f 镜像名称1:[TAG] 镜像名称2:[TAG] 多个镜像之间空格隔开

Docker container basic commands

docker run [OPTIONS] image [COMMAND][ARG...] : Create and launch container

Optional parameters options

Optional parameters	Parameter Description
--name = 'new container name'	Specify a name for the container
-i	Running in interactive mode containers, usually used simultaneously -t
-t	A pseudo input terminal reassign a container, and is typically used in conjunction -i
-d	Background container and return the container id

docker run --name 别名镜像id : Start ordinary container
docker run -it --name 别名镜像Id To run a container, alias, interactive mode, and assigns a pseudo-terminal: Start Interactive container
docker run -di --name 别名镜像Id: Create and launch container in order to protect type way

docker ps [OPTIONS] : List container

Optional parameters options

Optional parameters	Parameter Description
-a	Show all containers, including not running
-f	The content display filter conditions
--format	The return value of the specified template file
-l	Display container recently created
-n	N containers display recently created
--no-trunc	Do not cut output
-q	Silent mode, only the container ID
-s	Displays the total file size
-qa	List all containers id

exit : Container stop exit

ctrl + p + q : Container does not stop exit

docker attach 容器Id or 容器名 : Into the container

dockr start 容器id or 容器名 : Start container

dockr restart 容器id or 容器名 : Restart container

docker stop 容器id or 容器名 : Stop the container

docker kill 容器id or 容器名 : Stop the violence, directly kill the process (not recommended)

docker rm 容器id : If you remove the container is running, will complain, if you want to delete, you need to force the removal of

docker rm 容器Id -f : Force Delete

docker rm -f $(docker ps -qa) : Remove all containers

Docker containers and host port mapping

docker run [OPTIONS] IMAGE [COMMAND] [ARG...]: Docker RUN: create a new container and run a command

docker run -i -t -p 宿主机端口:容器应用端口 --name 别名镜像id : Docker container host port mapping

Optional parameters options

Optional parameters	Parameter Description
-d	Background container and return the container ID
-i	Running in interactive mode containers, usually used in conjunction with -t
-P (uppercase p)	Random port mapping, inside the container ports randomly mapped to the host port of the high
-p (lowercase p)	Designated port mapping format: a host (host) port: the port of the container
--name	Specify a name for the container

Docker modify the default storage location, Docker container migration

Docker in the default directory to store images and containers are: / var / lib / Docker / , / var easier under full recommended migration.

My system is Centos7, concrete steps to address the following:

Stop Docker services:

systemctl stop docker; //每个liunx版本的命令不一样。

Create a new directory in the docker sufficient disk space
```
mkdir -p /data/docker;   //在根目录下新建
```
Migration / var / lib / docker directory of the file to just the new good / data / docker below
```
cp -rvf /var/lib/docker/* /data/docker
```
Docker modify configuration
1. vim /etc/systemd/system/docker.service.d/devicemapper.conf
2. In the end of the file add:--graph=/data/docker
  
  Devicemapper.conf file contents are as follows:
```
[Service]
    ExecStart=
    ExecStart=/usr/bin/dockerd --insecure-registry=私服地址 --graph=/home/docker/lib
```
  注意：如果/etc/systemd/system/docker.service.d/devicemapper.conf，这个路径找不到的话，就新建，新建之后加入内容，没有私服地址的话就可以去掉”--insecure-registry=私服地址”。

重载配置，重启docker

systemctl daemon-reload;
systemctl restart docker;
systemctl enable docker;

启动成功后，确定容器没问题后删除/var/lib/docker/目录中的文件，然后就OK了。

查看容器日志

docker logs : 获取容器的日志

语法：docker logs [OPTIONS] CONTAINER

options 可选参数

可选参数	参数描述
-f	跟踪日志输出
--since	显示某个开始时间的所有日志
-t	显示时间戳
--tail	仅列出最新N条容器日志

Docker 容器目录挂载

我们在创建容器的时候，将宿主机的目录与容器内的目录进行映射，这样我们就可以实现宿主机和容器目录的双向数据自动同步。

我们可以通过容器目录挂载，能够轻松实现代码上传、配置修改、日志同步等需求。

语法： docker run -i -t -v /宿主机目录:/容器目录镜像id

多目录挂载：docker run -i -t -v /宿主机目录:/容器目录 -v/宿主机目录2:/容器目录2 镜像id

注意：如果同步多级目录，可能会出现权限不足的提示，只需要添加 --privileged=true 来解决挂载的目录没有权限的提示问题。

Docker容器启动的时候，如果要挂载宿主机的一个目录，可以用-v参数指定。

譬如我要启动一个centos容器，宿主机的/data/hData目录挂载到容器的/cData目录，可通过以下方式指定：

docker run -i -t -v /data/hData:/cData 470671670cac

注意点