CODEWITHSUNDEEP
docker
Pradip
Pradip

Reputation: 639

Mapping a MySQL docker port outside in an already running mysql container

Let me describe my situation.

I have a mysql docker running as below in a Azure VM:

docker ps output:

67b7d4f1eca6  2c9028880e58  "docker-entrypoint.s…"  4dayago  Up7hours(healthy) 3306/tcp, 33060/tcp mysql                                                                     


docker image ls output:
something.azurecr.io/mysql  latest  2c9028880e58    3 months ago        447MB


uname -a
Linux pradipmazure1 3.10.0-957.27.2.el7.x86_64 #1 SMP Mon Jul 29 17:46:05 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Now as we can see the mysql is not exposed to any outside port such that I can see it from my workstation outside of the VM.

I can not redeploy the whole VM anymore as it's a part of prod.

I would like to do something such that the mysql can potentially be exposed outside in some port of the same Azure Linux VM.

Any help in this regard would be highly appreciated.

Thanks, Pradip

Upvotes: 0

Views: 226

Answers (2)

Hans Kilian
Hans Kilian

Reputation: 25070

You can redirect the incoming traffic on port 3306 (or whatever port you want to expose MySql on) to port 3306 in the container. The container has an IP address on the bridge network that is reachable from the host. You can find the IP address of your container by running

docker inspect network bridge

When you've found the IP address, you can use redir to redirect the traffic with

redir --lport=3306 --caddr=172.17.0.2 --cport=3306

You need to run redir on the host. lport is the port you want to listen on. caddr is the IP address of the container.

For a cleaner solution you could even run redir in a new container. This might help you if you want to go that way: https://hub.docker.com/r/fr3nd/redir

Upvotes: 1

Antonio Petricca
Antonio Petricca

Reputation: 11006

The only solution I have in mind, because you can't recreate the MySQL container, is to link containers which need MySQL by the deprecated --link option.

Upvotes: 0

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