| # |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| |
| # -*-coding: utf-8-*- |
| |
| import json |
| import sys |
| import urllib2 |
| |
| URL_BASE = "http://%s:%s/metrics/server" |
| |
| def usage(): |
| print """Usage: python get-metrics.py [serverListFile] [jettyPort] [metricName] |
| Description: Extract server ip from line in the serverListFile, which contains |
| lines of server node and the format is $IP-$PORT. The ip and port are server's |
| rpc ip and port respectively, the port is useless here so we only extract the |
| ip and assemble the url with jetty http port to get metrics and extract the |
| value of the metric specified by metricName.""" |
| |
| def httpGet(url): |
| try: |
| content = urllib2.urlopen(url).read() |
| except Exception, e: |
| print >> sys.stderr, e |
| return None |
| return content |
| |
| def parseMetrics(jsonStr): |
| ret = dict() |
| jsonObj = json.loads(jsonStr) |
| metrics = jsonObj.get("metrics", None) |
| if metrics is None: |
| print >> sys.stderr, "metrics is invalid, jsonStr is %s" % jsonStr |
| return ret |
| for item in metrics: |
| name = item.get("name", None) |
| if name is None: |
| print >> sys.stderr, "%s is invalid, jsonStr is %s" % (str(item), jsonStr) |
| continue |
| value = item.get("value", None) |
| if value is None: |
| print >> sys.stderr, "%s is invliad, jsonStr is %s" % (str(item), jsonStr) |
| continue |
| ret[name] = value |
| return ret |
| |
| def getAllMetrics(url): |
| content = httpGet(url) |
| if content is None: |
| return dict() |
| return parseMetrics(content) |
| |
| def getMetrics(url, name): |
| metrics = getAllMetrics(url) |
| val = metrics.get(name, None) |
| if val is None: |
| print >> sys.stderr, "Fail to get %s using %s, metrics is %s" % (name, url, metrics) |
| return val |
| |
| def assembleUrl(line, port): |
| try: |
| ip, _ = line.strip().split("-") |
| return URL_BASE % (ip, port) |
| except Exception, e: |
| print >> sys.stderr, "fail to assemble %s" % line |
| print >> sys.stderr, e |
| |
| def main(): |
| args = sys.argv |
| if len(args) != 4: |
| usage() |
| sys.exit(1) |
| with open(args[1], 'rb') as f: |
| for line in f: |
| url = assembleUrl(line, args[2]) |
| m = getMetrics(url, args[3]) |
| print "Node %s , Metrcis[%s] %s" % (line.strip(), args[3], m) |
| |
| if __name__ == '__main__': |
| main() |