openstack 扩展开发最佳实践之云主机监控查询
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前言:此功能代码不代表笔者代码正常水平。。。真的只是为了实现而实现,很多硬代码加不优雅的地方。就让我自己先吐槽一下吧,首先是代码每次会去拿token而不是用horizon缓存的token,没有将js,css优雅的放进horizon,以及panel的名字都没改,最后就是前端布局不好看(这个真的是当下能力之外的了)。
首先说说需求,在horizon有这么一个页面,可以查看本项目的虚拟机的一些基本的性能指标,比如cpu使用率,内存使用率,磁盘io,网络io等。
怎么实现呢?
数据获取:
方案一,自己造轮子,写个agent到计算节点,然后起个服务作为服务端,然后horizon交互服务端。
方案二,用zabbix,写个plugin,zabbix存,horizon与zabbix交互。
方案三,horizon与ceilometer交互。
页面数据展示:
方案一:highcharts
方案二:echarts
方案三:horizon的js库。
笔者的数据取自ceilometer,数据展示选择highcharts。
注:ceilometer众所周知是有性能问题的,解决方案是gnocchi。
主题内容如下:
一:Ceilometer API
二:Highcharts API
三:组织代码
(一)Ceilometer API
CPU使用率:/v2/meters/cpu_util
内存使用量:/v2/meters/memory.resident
磁盘io:/v2/meters/disk.read.bytes.rate,/v2/meters/disk.write.bytes.rate
网络io:/network.incoming.bytes.rate, network.outgoing.bytes.rate
(二)Highcharts
<script language="javascript"> $(document).ready(function() { var chart = { zoomType: ‘x‘ }; var credits = { text: ‘UMCloud‘, href: ‘http://www.umcloud.com/‘ }; var title = { text: "{{hn}}: {{ ret.0.title }}" }; var xAxis = { type: ‘datetime‘, labels: { step: 1, formatter: function () { return Highcharts.dateFormat(‘%Y-%m-%d %H:%M‘, this.value ); } }}; var yAxis = { title: { text: "单位: {{ ret.0.unit }}" }, labels: { formatter: function () { return this.value; } } }; var tooltip = { valueSuffix: ‘{{ ret.0.unit }}‘, headerFormat: ‘{point.x:%Y-%m-%d %H:%M}<br>‘, pointFormat: "{series.name}: {point.y:.3f}" } var legend = { enabled: false //layout: ‘vertical‘, // align: ‘right‘, //verticalAlign: ‘middle‘, // borderWidth: 0 }; var exporting = { csv: { dateFormat: ‘%Y-%m-%d %H:%M‘ } }; var setOptions = { global: { useUTC: false } }; var series = {{ ret.1 }} ; var json = {}; json.title = title; json.chart = chart; json.xAxis = xAxis; json.yAxis = yAxis; json.tooltip = tooltip; json.legend = legend; json.series = series; json.credits = credits; json.setOptions = setOptions; $(‘#containerP‘).highcharts(json); }); $(‘#tableid‘).DataTable(); </script>
(三)组织代码
#coding: utf-8 import sys import requests import time import logging import os import subprocess as sp from ConfigParser import ConfigParser from pprint import pprint import datetime import json confFile="/etc/unit.conf" logfile = "/var/log/selfm.log" debug=False level = logging.WARNING if not debug else logging.DEBUG logging.basicConfig(level=level, format=‘%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s‘, datefmt=‘%a, %d %b %Y %H:%M:%S‘, filename=logfile, filemode=‘a‘) def tons(dateStr): """convert the isodateformate str to unix timestamp""" try: d = datetime.datetime.strptime(dateStr,‘%Y-%m-%dT%H:%M:%S.%f‘) except Exception as e: d = datetime.datetime.strptime(dateStr,‘%Y-%m-%dT%H:%M:%S‘) d = d + datetime.timedelta(hours=8) ret = d.strftime("%s000") return int(ret) class baseInfo(object): """init the info of API, and get the token for access the api""" def __init__(self, token=None): headers = {} headers["Content-Type"] = "application/json" self.headers = headers self.cf = ConfigParser() self.cf.read(confFile) self.conf = self.getConf() self.catalog, self.token = self.getToken() self.url = [url for url in self.catalog if url["name"] == "ceilometer"] self.url = self.url[0]["endpoints"][0]["publicURL"] def getConf(self): try: conf = { "url": self.cf.get("ser","OS_AUTH_URL"), "uname" : self.cf.get("ser","OS_USERNAME"), "passwd" : self.cf.get("ser","OS_PASSWORD"), "tname" : self.cf.get("ser","OS_TENANT_NAME")} except Exception as e: logging.critical("加载配置文件失败") logging.critical(e) return conf def getToken(self): headers = self.headers url = self.conf["url"] + "/tokens" data = ‘{"auth": {"tenantName": "%s", "passwordCredentials": {"username": "%s", "password": "%s"}}}‘ data = data % (self.conf["tname"], self.conf["uname"], self.conf["passwd"]) try: logging.debug("开始获取Token") ret = requests.post(url, data=data, headers=headers) #print ret.url logging.debug("request url:%s" % ret.url) ret = ret.json() except Exception as e: msg = "获取Token失败 data:%s headers:%s" % (data, headers) logging.critical(msg) logging.critical(e) catalog = ret["access"]["serviceCatalog"] token = ret["access"]["token"]["id"] return catalog, token def getCResp(self, suffix, method, data=None, headers=None, params=None, isjson=True): """return the result of ceilometer response""" url = self.url + suffix if headers == None: headers = self.headers.copy() headers["X-Auth-Token"] = self.token req = getattr(requests, method) try: ret = req(url, data=data, headers=headers, params=params, verify=False) #print ret.url logging.debug("request url:%s" % ret.url) except Exception as e: msg = "%s访问%s失败 data:%s headers:%s" % (method, suffix, data, headers) logging.critical(msg) logging.critical(e) sys.exit(1) if ret.status_code == 401: self.catalog, self.token = self.getToken() headers["X-Auth-Token"] = self.token ret = req(url, data=data, headers=headers) if isjson: ret = ret.json() return ret class ceil(baseInfo): """the class for grab ceilometer metric""" def __init__(self, vm, timeRange): super(ceil, self).__init__() self.timeRange = timeRange self.vm = vm self.qge = "&q.field=timestamp&q.op=lt&q.value=%s" % self.timeRange[0] self.qlt = "&q.field=timestamp&q.op=ge&q.value=%s" % self.timeRange[1] self.qr = "?q.field=resource_id&q.op=eq&q.value=%s" % self.vm def getData(self, suffix, plotype, title): data = [] options = {} for s in suffix: s2 = "".join([s, self.qr, self.qge, self.qlt, ‘&limit=10000‘]) #print s2 resp = self.getCResp(s2, "get") if resp: if s in ["/v2/meters/disk.read.bytes.rate", "/v2/meters/disk.write.bytes.rate"]: volumes = [[tons(i["recorded_at"]), i["counter_volume"] / 1024 ] for i in resp ] unit = "KB/s" name = s.split("/")[-1] else: volumes = [[tons(i["recorded_at"]), i["counter_volume"]] for i in resp ] unit = resp[1]["counter_unit"] name = s.split("/")[-1] seq = {"type": plotype, "name": name, "data": volumes} data.append(seq) else: unit = "None" title = "No Data" options["unit"] = unit options["title"] = title ret = [options, data] return ret def cpu(self, plotype="line", title="cpu_util"): """return the data series of highchart need ret = [options, data] options["unit"] = "None" options["title"] = "No Data" data = [{type:plottype,name:name,data:[nstime, datapoint]}] """ suffix = ["/v2/meters/cpu_util"] ret = self.getData(suffix, plotype, title) return ret def disk(self, plotype="line", title="diskio"): suffix = ["/v2/meters/disk.read.bytes.rate", "/v2/meters/disk.write.bytes.rate"] ret = self.getData(suffix, plotype, title) return ret def mem(self, plotype="line", title="memory_usage"): suffix = ["/v2/meters/memory.resident"] #suffix = ["/v2/meters/memory.resident", "/v2/meters/memory"] ret = self.getData(suffix, plotype, title) return ret def net(self, plotype="line"): suffix = "/v2/query/samples" meters = ["network.incoming.bytes.rate", "network.outgoing.bytes.rate"] options = {} data = [] kb = 1024 mb = 1024 * 1024 for m in meters: d = { "filter": "{\"and\": [{\"=\": {\"counter_name\": \"%s\"}}, {\"=~\": {\"resource_id\":\".*%s.*\"}}, {\"<\": {\"timestamp\": \"%s\"}}, {\">\": {\"timestamp\": \"%s\"}}]}" % (m, self.vm, self.timeRange[0], self.timeRange[1]) } #print d resp = self.getCResp(suffix, "post", data=json.dumps(d)) if resp: volumes = [[tons(i["recorded_at"]), i["volume"] / 1024 ] for i in resp ] unit = "KB/s" name = m seq = {"type": plotype, "name": name[8:16], "data": volumes} data.append(seq) else: unit = "None" title = "No Data" options["unit"] = unit options["title"] = "netio" ret = [options, data] return ret def test(): now = datetime.datetime.utcnow() yesterday = now + datetime.timedelta(hours=-2) now = now.isoformat() print now yesterday = yesterday.isoformat() c = ceil("8fc2a76e-90c5-491e-b207-28e90d5a5fab", (now, yesterday)) pprint(c.net()) #pprint(c.net()) if __name__ == "__main__": test()
总结
因为没有很技巧的部分,所以写着并不是有多少激情,只是实现了功能而已。需要花点时间的就是查询API,以及horizon的一些框架结构。
注:调试rest API超级推荐postman这个应用。
附图:
相关链接:
http://docs.openstack.org/admin-guide/telemetry-measurements.html
https://docs.openstack.org/developer/ceilometer/webapi/v2.html
http://api.highcharts.com/highcharts
代码地址:https://github.com/youerning/UserPyScript
本文出自 “又耳笔记” 博客,请务必保留此出处http://youerning.blog.51cto.com/10513771/1908464
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