MySQL containers not starting

[Arghya Dutta]

I am working on building a test suite of a microservice application using Tox-Docker. Our database is a MySQL DB, so we are trying to create a test DB to run our tests on. I am pulling the image MySQL5.7 from Docker hub. Here's the tox file I have written:

[tox]
envlist = py36
skipsdist = true
isolated_build = true

[docker:db1]
image = mysql:5.7
environment =
    MYSQL_USER = mysql
    MYSQL_PASSWORD = test123
    MYSQL_DB = test_db
ports = 
    3306:3306/tcp

[testenv]
deps =
    pytest==7.0.1
    pymysql
commands =
    sleep 10
    pytest {posargs} test_conn.py
passenv = *
docker = 
    db1

This does not bring up the MySQL DB container, I tried doing docker ps by putting a breakpoint before executing to find out whether the container has come up, but couldn't find any.

I tried the same code with the postgres example, and postgres is absolutely working fine.

I also tried putting a healthcheck in the docker section like this:

healthcheck_cmd = mysql -umysql -ptest123 --command="SELECT 1"
healthcheck_retries = 30
healthcheck_timeout = 1
healthcheck_interval = 1
healthcheck_start_period = 1

And this outrightly sends the output 'health check failed'.

py36 docker: health check 'mysql:5.7' (from 'db1')
py36 docker: remove '2bf94acb5d' (from 'db1')
_____________________________________________________ summary _____________________________________________________
ERROR:   py36: 'mysql:5.7' (from 'db1') failed health check
Traceback (most recent call last):
  File "/usr/local/bin/tox", line 11, in <module>
    sys.exit(cmdline())
  File "/usr/local/lib/python3.6/dist-packages/tox/session/__init__.py", line 44, in cmdline
    main(args)
  File "/usr/local/lib/python3.6/dist-packages/tox/session/__init__.py", line 69, in main
    exit_code = session.runcommand()
  File "/usr/local/lib/python3.6/dist-packages/tox/session/__init__.py", line 197, in runcommand
    return self.subcommand_test()
  File "/usr/local/lib/python3.6/dist-packages/tox/session/__init__.py", line 225, in subcommand_test
    run_sequential(self.config, self.venv_dict)
  File "/usr/local/lib/python3.6/dist-packages/tox/session/commands/run/sequential.py", line 22, in run_sequential
    runtestenv(venv, config)
  File "/usr/local/lib/python3.6/dist-packages/tox/session/commands/run/sequential.py", line 73, in runtestenv
    config.pluginmanager.hook.tox_runtest_pre(venv=venv)
  File "/usr/local/lib/python3.6/dist-packages/pluggy/_hooks.py", line 265, in __call__
    return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
  File "/usr/local/lib/python3.6/dist-packages/pluggy/_manager.py", line 80, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/usr/local/lib/python3.6/dist-packages/pluggy/_callers.py", line 60, in _multicall
    return outcome.get_result()
  File "/usr/local/lib/python3.6/dist-packages/pluggy/_result.py", line 60, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/usr/local/lib/python3.6/dist-packages/pluggy/_callers.py", line 39, in _multicall
    res = hook_impl.function(*args)
  File "/usr/local/lib/python3.6/dist-packages/tox_docker/tox3/plugin.py", line 100, in tox_runtest_pre
    docker_health_check(container_config, container, log)
  File "/usr/local/lib/python3.6/dist-packages/tox_docker/plugin.py", line 133, in docker_health_check
    raise HealthCheckFailed(msg)
tox_docker.plugin.HealthCheckFailed: 'mysql:5.7' (from 'db1') failed health check

Wondering if you could figure out if there is any issue deploying MySQL container.
Thanks

[Dan Crosta]

What output do you get when you try to run tox?