Circus 0.1 released
Tarek Ziade
we released Circus 0.1 -- a process watcher used now in the token server.
Circus let you manage workers from Python via APIs, or from a remote
console via zmq.
http://circus.readthedocs.org/en/latest/index.html
Here's an example of usage in the current token server deployment: I am
asking for the stats of the crypto runners, adding a new worker,
removing one, etc:
The crypto workers are called 'python' here, they should have a more
explicit name ;)
$ bin/circusctl stats python
python:
3: 28993 python token 0 3M 266M 0.0 0.8 0:01.34
2: 28990 python token 0 4M 266M 0.0 0.9 0:01.10
4: 28996 python token 0 3M 266M 0.0 0.8 0:01.60
7: 31813 python token 0 26M 266M 0.0 5.3 0:00.44
6: 31762 python token 0 26M 266M 0.0 5.4 0:00.59
$ bin/circusctl incr python
6
$ bin/circusctl stats python
python:
3: 28993 python token 0 3M 266M 0.0 0.8 0:01.36
2: 28990 python token 0 4M 266M 0.0 0.9 0:01.20
4: 28996 python token 0 3M 266M 0.0 0.8 0:01.61
7: 31813 python token 0 26M 266M 0.0 5.4 0:00.46
6: 31762 python token 0 26M 266M 0.0 5.4 0:00.60
8: 31839 python token 0 26M 266M 0.0 5.3 0:00.45
$ bin/circusctl decr python
5
If you need to maintain several processes in your project alongside the
web app, this can be very handy because you can basically hide all
the complexity of running n commands by doing that yourself from your
own Py app when it starts, and not worry about the rest.
It's like supervisord basically, but s/xmlrpc/zmq/ + can be used
programmaticaly
Read more at
http://circus.readthedocs.org/en/latest/index.html#why-should-i-use-circus-instead-of-x
(reason #3 is mostly for benoit who wants tu use it to manage couchdb
server farms)
Cheers
Tarek
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