Goal

• To add port exposure on running container

Intro

• I intalled MariaDB container and it was running
• However, it was not bound on host

Practice

1. Check bining ports

# docker port [CONTAINER_NAME] [PORT_NUMBER]

2. Create new container from running container

2.1. Stop running container

# docker stop  [CONTAINER_NAME]

2.2. Create container from running container

# docker commit [RUNNING_CONTAINER_NAME] [NEW_CONTAINER_NAME]

2.3. Remove original container and create container which is applied exposure port again

# docker rm [RUNNING_CONTAINER_NAME]

# docker run -p {HOST_IP}:{[HOST_PORT]}:[CONTAINER_PORT] [OPTIONS] [CONTAINER_NAME] [CREATED_CONTAINER_NAME]

-p, –publish : Publish a container’s port(s) to the host

::[CONTAINER_PORT] : HOST_RANDOM_PORT <-> CONTAINER_PORT

3. Check port binding

3.1. Check exposure port

# docker ps

3.2. Connection test by Telnet

$ telnet [HOST_IP] [PORT]

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References

• ongamedev blog