MySQL starts on its own even after stopping the process

Build Environment
1

I am having some trouble with default MySQL installation on CircleCI. In ‘post’ section of ‘machine’, I stop mysql using, “- sudo service mysql stop”. The reason behind doing so is that I want to use docker mysql container on port 3306. My “docker-compose up” takes some time to finish and sometimes before the docker mysql container starts, the mysql process starts again for no reason obvious to me. I have been tracking this issue using the following command.

while true; do sudo netstat -nlp | grep :3306; sleep 2; done

I have a build that ran fine with docker being able to register port 3306, and also a build in which mysqld started again even after stopping giving me the following error on docker-compose up.

ERROR: for dbm01  Cannot start service dbm01: failed to create endpoint minimum_dbm01_1 on network minimum_default: Error starting userland proxy: listen tcp 0.0.0.0:3306: bind: address already in use
ERROR: Encountered errors while bringing up the project.

Both the builds are of same commit so there is no difference in code. What might be the issue?

2

What build image are you using?

Also, can you try moving the line to stop MySQL from machine: post to dependencies: pre and seeing how that works?

3

Thanks for reply. I am using mariadb:latest build. I tried moving the line to stop MySQL to dependencies: pre. The issue persists.
Moving it to dependencies: override just before the docker-compose up command doesn’t help either.

4

Sorry I meant which image are you using for CircleCI not Docker. This is in your “Project Settings”.

5

I couldn’t find the build image anywhere in “Project Settings”. But I have not chosen any build image, I am using whatever is the default.

6

I have the same issue with 14.04

7

What seems to be working for Postgres users is to stop the service in test/pre. Could you try that?

8

I fixed it with:

machine:
pre:
- export DEBIAN_FRONTEND=noninteractive && sudo apt-get remove -y --purge mysql-server mysql-community-server