zc.zdaemonrecipe 0.2

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zdaemon recipe

zc.zdaemonrecipe provides a recipe that can be used to create zdaemon run-control scripts. It can be used directly in buildouts and by other recipes.

It accepts 2 options:

program

The anme of the program and, optionally, command-line arguments. (Note that, due to limitations in zdaemon, the command-line options cannot have embedded spaces.)

zdaemon.conf

Optionally, you can provide extra configuration in ZConfig format. What’s provided will be augmented by the zdaemon recipe, as needed.

deployment

The name of a zc.recipe.deployment deployment. If specified, then:

• The configuration, log, and run-time files will be put in deployment-defined directories.

• A logrotate configuration will be generated for the zdaemon transacript log.

Let’s look at an example:

>>> write('buildout.cfg',
... '''
... [buildout]
... parts = run
...
... [run]
... recipe = zc.zdaemonrecipe
... program = sleep 1
... ''')

If we run the buildout, we’ll get a run part that contains the zdaemon configuration file and a run script in the bin directory:

>>> print system(buildout),
Installing run.
Generated script '/sample-buildout/bin/zdaemon'.
Generated script '/sample-buildout/bin/run'.

>>> cat('parts', 'run', 'zdaemon.conf')
<runner>
  daemon on
  directory /sample-buildout/parts/run
  program sleep 1
  socket-name /sample-buildout/parts/run/zdaemon.sock
  transcript /sample-buildout/parts/run/transcript.log
</runner>
<BLANKLINE>
<eventlog>
  <logfile>
    path /sample-buildout/parts/run/transcript.log
  </logfile>
</eventlog>

>>> cat('bin', 'run')
#!/usr/local/bin/python2.4
<BLANKLINE>
import sys
sys.path[0:0] = [
  '/sample-buildout/eggs/zdaemon-2.0-py2.4.egg',
  '/sample-buildout/eggs/ZConfig-2.4-py2.4.egg',
  ]
<BLANKLINE>
import zdaemon.zdctl
<BLANKLINE>
if __name__ == '__main__':
    zdaemon.zdctl.main([
        '-C', '/sample-buildout/parts/run/zdaemon.conf',
        ]+sys.argv[1:]
        )

zdaemon will also be installed:

>>> ls('eggs')
d  ZConfig-2.4-py2.4.egg
d  setuptools-0.6-py2.4.egg
d  zc.buildout-1.0.0b27-py2.4.egg
d  zc.recipe.egg-1.0.0-py2.4.egg
d  zdaemon-2.0-py2.4.egg
d  zope.testing-3.4-py2.4.egg

You can use an eggs option to specify a zdaemon version.

If we specify a deployment, then the files will be placed in deployment-defined locations:

>>> mkdir('etc')
>>> mkdir('init.d')
>>> mkdir('logrotate')

>>> write('buildout.cfg',
... '''
... [buildout]
... parts = run
...
... [run]
... recipe = zc.zdaemonrecipe
... program = sleep 1
... deployment = deploy
...
... [deploy]
... name = test-deploy
... etc-directory = etc
... rc-directory = init.d
... log-directory = logs
... run-directory = run
... logrotate-directory = logrotate
... user = bob
... ''')

>>> print system(buildout),
Uninstalling run.
Installing run.
Generated script '/sample-buildout/init.d/test-deploy-run'.

>>> import os
>>> os.path.exists('parts/run')
False

>>> os.path.exists('bin/run')
False

>>> cat('etc', 'run-zdaemon.conf')
<runner>
  daemon on
  directory run
  program sleep 1
  socket-name run/run-zdaemon.sock
  transcript logs/run.log
  user bob
</runner>
<BLANKLINE>
<eventlog>
  <logfile>
    path logs/run.log
  </logfile>
</eventlog>

>>> cat('init.d', 'test-deploy-run')
#!/usr/local/bin/python2.4
<BLANKLINE>
import sys
sys.path[0:0] = [
  '/sample-buildout/eggs/zdaemon-2.0a6-py2.4.egg',
  '/sample-buildout/eggs/ZConfig-2.4a6-py2.4.egg',
  ]
<BLANKLINE>
import zdaemon.zdctl
<BLANKLINE>
if __name__ == '__main__':
    zdaemon.zdctl.main([
        '-C', 'etc/run-zdaemon.conf',
        ]+sys.argv[1:]
        )

>>> cat('logrotate', 'test-deploy-run')
logs/run.log {
  rotate 5
  weekly
  postrotate
    init.d/test-deploy-run -C etc/run-zdaemon.conf reopen_transcript
  endscript
}

If you want to override any part of the generated zdaemon configuration, simply provide a zdaemon.conf option in your instance section:

>>> write('buildout.cfg',
... '''
... [buildout]
... parts = run
...
... [run]
... recipe = zc.zdaemonrecipe
... program = sleep 1
... deployment = deploy
... zdaemon.conf =
...     <runner>
...       daemon off
...       socket-name /sample-buildout/parts/instance/sock
...       transcript /dev/null
...     </runner>
...     <eventlog>
...     </eventlog>
...
... [deploy]
... etc-directory = etc
... rc-directory = init.d
... log-directory = logs
... run-directory = run
... logrotate-directory = logrotate
... user = bob
... ''')

>>> print system(buildout),
Uninstalling run.
Installing run.
Generated script '/sample-buildout/init.d/deploy-run'.

>>> cat('etc', 'run-zdaemon.conf')
<runner>
  daemon off
  directory run
  program sleep 1
  socket-name /sample-buildout/parts/instance/sock
  transcript /dev/null
  user bob
</runner>
<BLANKLINE>
<eventlog>
</eventlog>

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