How to modify docker container port

The modification method is as follows:

(Recommended learning: docker tutorial)

1. Stop the container

2. Stop the docker service

systemctl stop docker

3. Modify the port in the hostconfig.json file of this container (if the port is also recorded in config.v2.json, you must also modify it)

cd /var/lib/docker/3b6ef264a040*  #这里是CONTAINER ID

vi hostconfig.json

If there is no port mapping before, there should be a paragraph like this: "PortBindings":{}

Add a mapping like this: "PortBindings":{"3306/tcp":[{"HostIp":"" ,"HostPort":"3307"}]}

The first number is the container port, and the latter number is the host port. Modifying the existing port mapping is simpler, just change the port number.

4. Start the docker service

systemctl start docker

5. Start the container

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