Docker related introduction and usage

itread01 2021-01-22 21:21:02
docker related introduction usage


  Think of it as a piece of software , In this software , You can also install other software , You can also add the environmental dependencies needed by the software , In this way, developers' programs can flow in different environments , Avoid the appearance of programs “ The water ” The state of

Docker Structural diagram



  It can be seen from the picture that :  operation Docker It can be divided into :  Install Docker >> operation Docker Service object >> Operation image >> Container operation >> Export

One .linux Installed in Docker:

# 1、yum The package is updated to the latest yum update# 2、 Install the required packages , yum-util Provide yum-config-manager function , The other two are devicemapper Drive dependent yum install -y yum-utils device-mapper-persistent-data lvm2# 3、 Set yum Source yum-config-manager --add-repo 4、 Install docker, Press... On the input interface y yum install -y docker-ce# 5、 Look at docker edition , Verify that the verification was successful docker -v

One . operation Docker Service object , It can be divided into 5 A command

1. View service status   systemctl status docker

2. Start the service   systemctl start docker

3. Stop service   systemctl stop docker

4. Restart the service   systemctl resstart docker

5. Start the service   systemctl enable docker


3、 ... and . Operation image

1. Look at the local image   : docker images 

2. Search for images ( From the central warehouse ) Such as : docker search mysql

3. docker pull mysql 5.6( If not followed by the version number, download the official default version )

4.docker rmi + The image ID


Four . Container operation  

1. Create container : docker run -it/id/create   --name=xxx( Omit not to write ) mysql:5.6( Image name : Version number )  /bin/bash  //-it: The open container is in interactive mode : After the command is executed, it goes directly into the container   -id: Guard mode , The command does not enter the container after execution , But the container service starts create: Represents the creation of a container , After the command is executed , The state of the container is waiting to be opened

2. Start container :docker start xxx( Container name )

3. Enter container :docker exec xxx( Container name ) The container must be started to execute successfully

4. Exit the container :exit ( If the container is in interactive mode , The state of the container will change to the stop state after push out , If the container is in guard mode, exit is just exit window , The container doesn't stop ).

5. View started container docker ps  View all containers docker ps -a

6. View container details : docker inspect


5、 ... and . Export

1. Export a container into an image :docker commit  Containers id    Image name : Version number  

2. Type an image into j Compression pack ::docker save -o xxxx.jar( Package name ) Image name : Version number

3. Export a compressed package into an image :docker load -i xxxx.jar( Package name )



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