Docker common operation commands_docker commands Daquan

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Docker common commands use

1 Container Lifecycle Management

1.1 docker run

  • The run command is used to run a new container
# docker run syntax
docker run [OPTIONS] IMAGE [COMMAND] [ARG...]
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OPTIONS

Description

-d

Run the container in the background and return the container ID

–name

Specify a name for the container --name container-name or --name=container-name (two - )

-p

Specify the port mapping, the format is: host (host) port: container port or externally exposed port: container (project) port

-m

Set the maximum memory used by the container

-i

Run the container in interactive mode, usually with -t

-t

reassigns a pseudo input terminal for the container, usually used with -i

1.2 docker start/stop/restart

  • Start, stop, restart containers
# grammar:
# start the container
docker start [OPTIONS] CONTAINER [CONTAINER...]
# stop container
docker stop [OPTIONS] CONTAINER [CONTAINER...]
# restart the container
docker restart [OPTIONS] CONTAINER [CONTAINER...]
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1.3 docker kill

  • Force kill the container
# grammar
docker kill [OPTIONS] CONTAINER [CONTAINER...]
# -s : send a signal to the container
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Kill the running container tomcat (specify the container name) docker kill -s KILL tomcat Kill the running container (specify the container id) docker kill -s kill 3a5b

1.4 docker pause/unpause

  • Pause and resume all container processes
# grammar
# 1. Pause all processes in the container
docker pause CONTAINER [CONTAINER...]

# 1. Resume all processes in the container
docker unpause CONTAINER [CONTAINER...]
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Pause database container mysql; provide service docker pause mysql Restoring the database container mysql provides services docker unpause mysql

1.5 docker exec

  • Execute commands in the running container (usually bash into the container)
# grammar
docker exec [OPTIONS] CONTAINER COMMAND [ARG...]

-d :Separate mode: run in the background

-i :keep even if not attached STDIN Open

-t :Allocate a pseudo terminal
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Enter mysql in docker (pseudo terminal, exit exit, does not affect normal operation)   docker exec -it mysql bash   mysql -uroot -p    Enter the password of mysql

1.6 docker rm

  • Delete one or more containers. By default, only non-running containers can be deleted.
    • The   -f parameter can be forcibly deleted (not mandatory, you need to docker stop first, then docker rm)
# grammar 
docker rm [OPTIONS] CONTAINER [CONTAINER...]

-f :pass SIGKILL The signal forces the removal of a running container.

-l :Remove network connections between containers, not the containers themselves.

-v :Delete the volume associated with the container.
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delete multiple containers     docker rm CONTAINER_id1 CONTAINER_id2 delete all containers     docker rm -f ($docker ps -aq)

2 Container Operations

2.1 docker ps

  • List container related information

OPTIONS

Description

-a

The parameter can view the container in all states

-s

Show total file size

-f

Filter displayed content based on criteria

–format

template file specifying return value

-l

Show recently created containers

-n

List the n most recently created containers

–no-trunc

Do not truncate output

–q

silent mode, only the container number is displayed

docker ps # default is to view, running docker container

2.2 docker inspect

  • Used to view the configuration information of the container, including container name, environment variables, running commands, host configuration, network configuration and data volume configuration, etc.
# grammar 
docker inspect [OPTIONS] CONTAINER|IMAGE|TASK

-f :template file specifying return value

-s :Show total file size

--type :return for the specified type JSON

# Get information about the container mysql
docker inspect mysql
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2.3 docker logs - view docker container logs

  • Used to view the log of the container, it will output the data output to standard output as a log to the terminal of the docker logs command. Commonly used for backend containers
$ docker logs [OPTIONS] CONTAINER
  Options:
        --details        show more information
    -f, --follow         Track real-time logs
        --since string   displayed from a timestamp After the log, or relative time like 42 m(i.e. 42 minutes)
        --tail string    How many log lines to display from the end of the log, default is all
    -t, --timestamps     show timestamp
        --until string   displayed from a timestamp previous log, or relative time such as 42 m(i.e. 42 minutes)
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Example: 

# CONTAINER_ID: can be the container full id or container name
# View logs after a specified time, only show the last 100 lines
docker logs -f -t --since="2022-02-08" --tail=100 CONTAINER_ID

# View logs for the last 30 minutes:
docker logs --since 30m CONTAINER_ID

# View logs after a certain time:
docker logs -t --since="2022-02-08T13:23:37" CONTAINER_ID

# View logs for a certain period of time:
docker logs -t --since="2022-02-08T13:23:37" --until "2022-02-09T12:23:37" CONTAINER_ID
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2.4 docker export

  • Package the container and export it to tar file format
# grammar
docker export [OPTIONS] CONTAINER

Example: will id for 746300 e14aa4 Containers are saved by date as tar document
docker export -o mysql-`date +%Y%m%d`.tar 746300e14aa4

ls mysql-`date +%Y%m%d`.tar      >>     mysql-20211228.tar
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2.5 docker port

  • Output information about the port mapping between the container and the host
grammar: docker port CONTAINER [PRIVATE_PORT[/PROTO]]
Example: View Containers mysql port mapping.

docker port mysql
>>>		 3306/tcp -> 0.0.0.0:3001
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3 Local image management

3.1 docker images

  • List all local mirrors
grammar: docker images [OPTIONS] [REPOSITORY[:TAG]]

-a :List all local images (including intermediate image layers, by default, the intermediate image layers are filtered out);

--digests :Display the summary information of the mirror;

-f :Display images that meet the conditions;

--format :A template file specifying the return value;

--no-trunc :Display complete image information;

-q :show only mirror ID

# Displays all containers by default, (generally) equivalent to docker images -a
docker images
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3.2 rmi

  • delete one or more mirrors
# grammar
docker rmi [OPTIONS] [IMAGE...]

-f :forced deletion;

--no-prune :The process image of the image is not removed, it is removed by default;

docker rmi -f ($docker images -aq)delete all images
docker rmi -f mysql   delete mysql mirror

docker image rm mysql    Only one image can be deleted at a time
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3.3 docker build

  • Explanation of common parameters: docker build [OPTIONS] PATH | URL | –

OPTIONS

Description

-f

The name of the Dockerfile (default "PATH/Dockerfile")

-t，–tag

Specify the built image name and tag

3.4 docker save

  • Save the specified image as a tar archive
# grammar 
docker save [OPTIONS] IMAGE [IMAGE...]

Example: mirroring mysql generate mysql.tar Documentation
docker save -o mysql.tar mysql
ll mysql.tar
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3.5 docker load

  • Import the packaged image
# grammar
docker load [OPTIONS]

--input , -i : Specify the imported file, instead of STDIN. 

--quiet , -q : Condensed output information.


# Example
# Import a packaged msyql image
docker load < mysql.tar
docker images
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Posted by smitthhyy on Sat, 01 Oct 2022 17:12:03 +0930

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