This module provide a methods to handle runit or daemontools based supervised services, using the control file provided. Here is a small example:
>>> import supervise
>>> s = supervise.Service('test')
>>> print s.status()
{'action': None, 'status': 0, 'uptime': 300L, 'pid': None}
>>> s.start()
>>> print s.status()
{'action': None, 'status': 1, 'uptime': 3L, 'pid': 27450}
Read the manpage of runsv(8) for more information. Also read the documentation for ServiceStatus to known how to parse status information.
Last month I needed to install runit in some servers to supervise a couple of services. Unfortunately my management interface cannot handle the services anymore, so I decided to write a small module in python to solve this handicap, and that is the result!.
With this module you can handle in python environment a number of runit scripts. I think that this might be work for daemontools too, but I do not test yet. Let's see an example:
>>> import supervise
>>> c = supervise.Service("/var/service/httpd")
>>> print s.status()
{'action': 'normal', 'status': 'up', 'uptime': 300L, 'pid': None}
>>> if s.status()['status'] == supervise.STATUS_DOWN: print "service down"
service down
>>> s.start()
>>> if s.status()['status'] == supervise.STATUS_UP: print "service up"
service up
Personally I use this module with rpyc library to manage remotely the services running in a host, but it too easy making a web interface, for example using bottle:
import supervise
import simplejson
from bottle import route, run
@route('/service/status/:name')
def service_status(name):
return simplejson.dumps( supervise.Service("/var/service/" +
name).status() )
@route('/service/up/:name')
def service_up(name):
c = supervise.Service("/var/service/" + name)
c.start()
return "OK UP"
@route('/service/down/:name')
def service_down(name):
c = supervise.Service("/var/service/" + name)
c.down()
return "OK DOWN"
if __name__ == "__main__":
run()
Now you can stop your service just only point your browser http://localhost/service/down/httpd (to down http service in this case).
Enjoy!
- author
Andres J. Diaz <ajdiaz@connectical.com>
- date
2009-11-21
- maintainer
Peter Ruibal <ruibalp@gmail.com>