Use of Docker containers
1. Get the mirror
There is no mirror locally, pull the mirror directly from the docker hub
docker pull ubuntu
2. Start the mirror
Start the mirror in command line mode:
docker run -it ubuntu /bin/bash
-i: interactive operation
-t: terminal
Start the container and run it in the background:
docker run -itd --name ubuntu-test ubuntu /bin/bash
-d: specify the container to run in the
background -name: specify the NAMES of the container
3. Exit the current container
exit或ctrl+D
4. View the running container
docker ps
5. View all containers
docker ps -a
6. Stop a container
docker stop <容器ID> 或者是 <容器名>
7. Restart a stopped container
docker restart <容器ID> 或者 <容器名>
8. Two ways to enter the container
- docker attach
- docker exec: The second method is recommended, because after this method enters the container and runs, it will not stop the container when exiting
Note for attach command : If you exit from this container, it will cause the container to stop.
Note for exec command : If you exit from this container, it will not stop the container, which is why it is recommended that you use docker exec.
Description: The difference between entering a container and running a container:
1.运行容器：docker run
在第一次使用某个容器时首先需要使用docker使该容器运行起来，运行的方式也有多种，大多数情况下，
我们选择后台运行的方式
2.进入容器：docker exec
当容器以后台方式运行时，我们可以使用docker exec或docker attach的方式重新进入后台运行的容器
9. Export and import containers
Function: Some changes have been made when using the container, and I want to save the changed container as a snapshot to facilitate the next import
Export container snapshot
docker export 1e560fca3906 > ubuntu.tar
Import container snapshot
cat docker/ubuntu.tar | docker import - test/ubuntu:v1
通过指定 URL 或者某个目录来导入
docker import http://example.com/exampleimage.tgz example/imagerepo
10. Delete the container
Special Note : Be sure to confirm that the container has stopped running before deleting the container
docker rm -f 1e560fca3906
The following command can clean up all containers in a terminated state
docker container prune