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  1. MariaDB Foundation Development
  2. MDBF-122

Automate VM creation process for LibVirt workers

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    • Task
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • N/A
    • N/A
    • None
    • None

    Description

      For install and upgrade tests we use LibVirt managed KVMs.

      We currently have one LibVirt worker that handles these types of workers (bg-bbw5-x64). We need an automatic way of creating VMs for all major operating systems and platforms that we are supporting (basically, for all the OSs and platforms for which we create Docker images - see https://github.com/MariaDB/mariadb.org-tools/blob/master/.github/workflows/bb_containers.yml)

      VM creation

      Create the image and configure LibVirt to use it. The current naming scheme consists in "buildbot-osname". Probably we need to adjust that.
      Setup the base image (see VM installed packages below)
      Configure LibVirt hook to always start from a clean VM

      VM installed packages

      The VMs need to be clean and have nothing installed except:

      import fnmatch
      import os
      import sys
       
      from twisted.application import service
      from twisted.python.log import FileLogObserver
      from twisted.python.log import ILogObserver
       
      from buildbot_worker.bot import Worker
       
      # setup worker
      basedir = os.path.abspath(os.path.dirname(__file__))
      application = service.Application('buildbot-worker')
       
       
      application.setComponent(ILogObserver, FileLogObserver(sys.stdout).emit)
      # and worker on the same process!
      buildmaster_host = os.environ.get("BUILDMASTER", 'buildbot.mariadb.org')
      port = int(os.environ.get("BUILDMASTER_PORT", 9990))
      workername = os.environ.get("WORKERNAME", 'buildbot-ubuntu1804')
      passwd = os.environ.get("WORKERPASS", 'PASSWORD')
       
      # delete the password from the environ so that it is not leaked in the log
      blacklist = os.environ.get("WORKER_ENVIRONMENT_BLACKLIST", "WORKERPASS").split()
      for name in list(os.environ.keys()):
          for toremove in blacklist:
              if fnmatch.fnmatch(name, toremove):
                  del os.environ[name]
       
      keepalive = 600
      umask = None
      maxdelay = 300
      allow_shutdown = None
      maxretries = 10
       
      s = Worker(buildmaster_host, port, workername, passwd, basedir,
                 keepalive, umask=umask, maxdelay=maxdelay,
                 allow_shutdown=allow_shutdown, maxRetries=maxretries)
      s.setServiceParent(application)
      

      Attention the WORKERNAME must match the name of the LibVirt VM. The password also needs to be set.

      • Ideally, include a possibility to easily add packages if needed.

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              faust Faustin Lammler
              vladbogo Vlad Bogolin
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