#!/usr/bin/python ''' Wildcard plugin to monitor Apache Tomcat connectors and/or JBoss' JVM. To use this plugin: 1. Set site, username and password variables before you do anything else. 2. Run plugin with suggest argument to get all the available options. 3. Copy plugin to munin plugins folder and make it executable. 4. Create symbolic links based on output from step 2. Examples: tomcat_jvm - monitor JVM usage tomcat_ajp-127.0.0.1-8009 - monitor ajp connector tomcat_http-127.0.0.1-8080 - monitor http connector 5. Check links by running them. 6. Restart munin-node. 7. Enjoy graphs. Munin's muni-node-configure can be used to do steps 2, 3 and 4 for you. Example of using munin-node configuration to configure the plugin: [tomcat_jvm] env.site http://127.0.0.1:8080/status?XML=true env.username admin env.password admin env.url_timeout 5 timeout 10 url_timeout - timeout for urllib2 timeout - plugin timeout Plugin must return before timeout value runs out, otherwise bye, bye graphs. Magic markers #%# capabilities=autoconf suggest #%# family=auto ''' import urllib2 import base64 import xml.dom.minidom import sys, os, re # Configure me ... site = 'http://127.0.0.1:8080/status?XML=true' url_timeout = 5 username = 'admin' password = 'admin' # Or do it with the environment variables in munin-node configuration. if os.environ.has_key('site'): site = os.environ['site'] if os.environ.has_key('url_timeout'): url_timeout = os.environ['url_timeout'] if os.environ.has_key('username'): username = os.environ['username'] if os.environ.has_key('password'): password = os.environ['password'] # Timeout for urlopen. required_version = (2, 6) current_version = sys.version_info[:2] connector_attrs = ( 'maxThreads', 'minSpareThreads', 'maxSpareThreads', 'currentThreadCount', 'currentThreadBusy' ) jvm_attrs = ( 'free', 'total', 'max' ) ctx = sys.argv[0].rstrip('.py').split('_')[1] def site_auth(): # Prepare base64 encoded string enc_string = base64.encodestring('%s:%s' % (username, password)) # Prepare request and add headers request = urllib2.Request(url=site, headers={"Authorization": "Basic %s" % enc_string}) try: if current_version >= required_version: return (0, urllib2.urlopen(request, timeout=url_timeout).read()) else: import socket socket.setdefaulttimeout(url_timeout) return (0, urllib2.urlopen(request).read()) except: return (-1, "Failed to access %s" % site) def jvm_data(data): document = data.documentElement for sub_document in document.childNodes: if sub_document.nodeName == 'jvm': node = sub_document.firstChild for attr in jvm_attrs: print "%s.value %s" % (attr, int(node.getAttribute(attr))) def connector_data(data, connector_name): document = data.documentElement for sub_document in document.childNodes: if sub_document.nodeName == 'connector' and sub_document.getAttribute('name') == connector_name: node = sub_document.firstChild for attr in connector_attrs: try: print "%s.value %s" % (attr, int(node.getAttribute(attr))) except: pass def suggest(data): document = data.documentElement for sub_document in document.childNodes: if sub_document.nodeName == 'jvm': print "jvm" elif sub_document.nodeName == 'connector': print sub_document.getAttribute('name') else: pass def configure(): print "graph_title Tomcat status - %s" % ctx print "graph_category tomcat" if ctx == 'jvm': print "graph_args --base 1024 -l 0" print "graph_scale yes" print "graph_vlabel JVM in bytes" print "graph_info This graph shows JVM usage of Tomcat." for attr in jvm_attrs: print "%s.label %s" % (attr, attr) print "%s.type GAUGE" % (attr) print "%s.min 0" % (attr) print "%s.draw LINE1" % (attr) print "%s.info %s %s in bytes" % (attr, ctx, attr) else: print "graph_args --base 1000 -l 0" print "graph_scale no" print "graph_vlabel Connector threads" print "graph_info This graph shows connector threads for %s" % ctx for attr in connector_attrs: print "%s.label %s" % (attr, attr) print "%s.type GAUGE" % (attr) print "%s.min 0" % (attr) print "%s.draw LINE1" % (attr) print "%s.info %s %s count" % (attr, ctx, attr) if __name__ == "__main__": status, data = site_auth() if len(sys.argv) == 2 and sys.argv[1] == 'config': configure() sys.exit(0) elif len(sys.argv) == 2 and sys.argv[1] == 'suggest': suggest(xml.dom.minidom.parseString(data)) sys.exit(0) elif len(sys.argv) == 2 and sys.argv[1] == 'autoconf': if status == 0: print "yes" else: print "no (%s)" % data sys.exit(0) else: if ctx == 'jvm': if status == -1: for attr in jvm_attrs: print "%s.value 0" % (attr) else: jvm_data(xml.dom.minidom.parseString(data)) else: if status == -1: for attr in connector_attrs: print "%s.value 0" % (attr) else: connector_data(xml.dom.minidom.parseString(data), ctx)