docker-gravedigger

A tool to kill and remove docker containers after 24h. Looks into "whitelist" to find containers, which should not be removed.

We use this project to remove containers, which have been started in our GitLab CI with privileged mode. If a pipeline then fails, the started containers are not being killed by the CI. Therefore, we had containers on our shared runners, which were running forever. This script then kills them after 24 hours.

Setup

Create a pipenv and install requirements:

$ pipenv install

Usage

1. Modify whitelist.txt to your needs. Here you can store a regex, which is interpreted by Python. Matching containers will not be removed. For example, if you want to keep all containers containing the substring "dbas_", e.g. "dbas_web_1" or "dbas_db_1", you have to add "dbas_" to the whitelist. Reads one line at a time. Here is a sample whitelist.txt-file:

   dbas_
   pleasedontstopme
   

2. Use pipenv to run the gravedigger module:

   $ pipenv run python gravedigger/gravedigger.py
   

3. You can find a summary of the completed actions in gravedigger.log.

Dependencies

We are using Python 3.6 with the following modules:

• logging
• re
• datetime
• dateutil
• docker