We have Buildbot on remote server to run python selenium tests.
After a couple of days the tmp rubbish from XVFB and Selenium totaly consume all empty space and freeze the Buildbot activity. I used to clear /tmp it manualy with sudo rm -rf *
in /tmp folder and then sudo supervisorctl restart all
I write simple preparing step what do it automatically before all steps. But it provide some xvfb errors like some tmp file not found. Without proper restart it wont work well. And i dont know how to properly restart builbot(or XVFB?) without some deadly loop of self-restarting and building again