-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, > > I'm currently working on a PoC with twisted, Python, to prove the > technology as an alternative to more > established enterprise choices (java app servers, etc..).
> the question is: if I have N number of processes running in a M number > of machines, given that there are no network restriction, > and that at least http and hhtps are always available, how these > services would be efficiently monitored? I've been planning to blog(done [1]) about this. What I do is to have the service listen to a http connection that returns some monitoring data. Something like the one below. Then I use a custom Nagios plugin to request this url and Nagios-PNP to make graphs of whatever datapoints the monitor produces. The plugin setup is done by providing an url (say http://myservice:893/monitor) to monitor. The plugin will then both monitor the application and graph it. I have also added an extra field for "errors" that I use to report odd exceptions or other types of failures that are non-fatal but should be investigated. If the error count exceeds a set level the may also go into the reporting. http://www.kraken.no/blog/?q=node/9 Regards, Tarjei class Monitor(rend.Page): """ Basic monitoring interface todo: make it even more general. Format: <itemname value="int" critical="int" warning="int" unit="UOM" label="itemname" min="0" max="300" /> UOM (unit of measurement) is one of: no unit specified - assume a number (int or float) of things (eg, users, processes, load averages) s - seconds (also us, ms) % - percentage B - bytes (also KB, MB, TB) c - a continous counter (such as bytes transmitted on an interface) """ def __init__(self, config): self.isLeaf = True self.config = config def renderHTTP(self, ctx): inevow.IRequest(ctx).setHeader('Content-Type', 'text/xml; charset=UTF-8') #que_length = str(len(getter.get_ids(0, -1))) #num_updated = str(get_nr_updated_last_day(self.config.get_db())) num_errors = str(len(self.config.getErrors())) _root = ET.Element('status', {'service' : 'PDFIndexer'}) if 'total' in self.config.stats: _doc = ET.SubElement(_root,'total', {'value': str(self.config.stats['total']) }) _doc = ET.SubElement(_root,'runnerStatus', {'value': str(self.config.checksStatus()) }) #_doc = ET.SubElement(_root,'itemsAddedlast24', {'value': num_updated}) _errors = ET.SubElement(_root,'errors', {'value': num_errors, 'critical': "3" , 'warning': "2"}) for error in self.config.getErrors(): t = ET.SubElement(_errors, 'error', text = error) _xmlcontainer = StringIO() ET.ElementTree(_root).write(_xmlcontainer, encoding="UTF-8") return _xmlcontainer.getvalue() > > is there a twisted application/plugin/framework to do so? are you just > create 'polling' requests that an existing monitoring tool (i.e. > Nagios) > parses and interprets? How would you build a "console" to manage > services status? > In a nutshell, what I'm trying to find out if there is already around > a "container-like" twisted based application that can be used to > manage/monitor > twisted applications provided that they adhere to a given interface > > Thanks for your help > > Micc > > _______________________________________________ > Twisted-Python mailing list > Twisted-Python@twistedmatrix.com > http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFJom29YVRKCnSvzfIRAo0XAKCCOhwp1qIi0Qx2Dae0hn5gHkt5rwCfc8fn XYXuTUrB2c/eR8ex870rXAc= =pqNc -----END PGP SIGNATURE----- _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
