[Ganglia监控扩展]监控nginx的连接数
jopen
12年前
<div> <div> <div> <span style="font-size:10pt;">Ganglia监控支持多种脚本的功能扩展，本文介绍使用python扩展对nginx连接数进行监控,可以到网上下载监控脚本：</span> <a href="/misc/goto?guid=4959500681933854336"><span style="font-size:10pt;">https://github.com/csakatoku/ganglia-pymodule_nginx_status</span></a> <span style="font-size:10pt;">。</span> <span style="font-size:10pt;">这个监控脚本主要是借助nginx自身的监控模块来实现，nginx需要开启--with-http_stub_status_module模块，如果没有开启，需要重新编译nginx（重新编译后需要kill -QUIT才能生效）。<br /> <br /> 第一步，配置nginx，开启nginx_status监控：<br /> 在nginx.conf中添加如下配置:<br /> </span> <div style="border-bottom:#cccccc 1px solid;border-left:#cccccc 1px solid;padding-bottom:4px;background-color:#eeeeee;padding-left:4px;width:98%;padding-right:5px;font-size:13px;word-break:break-all;border-top:#cccccc 1px solid;border-right:#cccccc 1px solid;padding-top:4px;"> server { <br /> listen 12345; <span style="color:#008000;">#</span> <span style="color:#008000;">监听的端口</span> <span style="color:#008000;"><br /> </span> server_name 127.0.0.1; <span style="color:#008000;">#</span> <span style="color:#008000;">当前机器的ip或域名</span> <span style="color:#008000;"><br /> </span> location /nginx_status { <br /> stub_status on; <br /> access_log off; <br /> <span style="color:#008000;">#</span> <span style="color:#008000;">allow xx.xx.xx.xx;#允许访问的IP地址</span> <span style="color:#008000;"><br /> </span> <span style="color:#008000;">#</span> <span style="color:#008000;">deny all;</span> <span style="color:#008000;"><br /> </span> allow all; <br /> } <br /> } </div> </div> </div> </div> <div> <span style="font-size:x-small;">重启nginx，可以到http://127.0.0.1:12345/nginx_status下看到结果：<br /> <img title="[Ganglia监控扩展]监控nginx的连接数 " border="0" alt="[Ganglia监控扩展]监控nginx的连接数 " src="https://simg.open-open.com/show/3cd9bbdb5919f8d2645ea52c33a84320.png" width="361" height="121" /><br /> 关于上面的结果的说明，请参考官方解释：<a href="/misc/goto?guid=4959500682019270164">http://wiki.nginx.org/HttpStubStatusModule</a>，这里讲得很明白。<br /> <br /> </span> </div> <div> <span style="font-size:10pt;">第二步，配置ganglia客户端，收集nginx_status数据：<br /> 在/etc/ganglia目录下新建conf.d和python_modules目录，把下载的扩展文件分别复制到这两个目录下，修改配置文件</span> <span style="font-size:12px;">nginx_status.pyconf</span> <span style="font-size:10pt;">里的nginx监控访问路径和nginx启动文件的路径；</span> <span style="font-size:10pt;">接下来需要修改gmond.conf文件，添加如下两段：</span> </div> <div> <span style="font-size:10pt;">在modules下添加python支持：</span> </div> <div> <div style="border-bottom:#cccccc 1px solid;border-left:#cccccc 1px solid;padding-bottom:4px;background-color:#eeeeee;padding-left:4px;width:98%;padding-right:5px;font-size:13px;word-break:break-all;border-top:#cccccc 1px solid;border-right:#cccccc 1px solid;padding-top:4px;"> module { <br /> name = <span style="color:#800000;">"</span> <span style="color:#800000;">python_module</span> <span style="color:#800000;">"</span> <br /> path = <span style="color:#800000;">"</span> <span style="color:#800000;">modpython.so</span> <span style="color:#800000;">"</span> <span style="color:#008000;">#</span> <span style="color:#008000;">这里需要确定ganglia安装目录下的lib64里是否有这个文件</span> <span style="color:#008000;"><br /> </span> params = <span style="color:#800000;">"</span> <span style="color:#800000;">/etc/ganglia/python_modules</span> <span style="color:#800000;">"</span> <br /> } </div> </div> <div> <span style="font-size:10pt;">在文件最后导入python配置：</span> </div> <div> <div style="border-bottom:#cccccc 1px solid;border-left:#cccccc 1px solid;padding-bottom:4px;background-color:#eeeeee;padding-left:4px;width:98%;padding-right:5px;font-size:13px;word-break:break-all;border-top:#cccccc 1px solid;border-right:#cccccc 1px solid;padding-top:4px;"> include ( <span style="color:#800000;">"</span> <span style="color:#800000;">/etc/ganglia/conf.d/*.pyconf</span> <span style="color:#800000;">"</span>) </div> <span style="font-size:10pt;">重启gmond服务：service gmond restart，这样就开始收集这台机器上的nginx监控数据。<br /> <br /> 第三步，配置监控前端页面：<br /> 如果只需要查看单台机器的监控图表，直接在这台机器的节点里就可以看到，如下：<br /> <img title="[Ganglia监控扩展]监控nginx的连接数 " border="0" alt="[Ganglia监控扩展]监控nginx的连接数 " src="https://simg.open-open.com/show/91a07c5475dd0457562dacadb476dfcf.png" width="500" height="226" /><br /> <img title="[Ganglia监控扩展]监控nginx的连接数 " border="0" alt="[Ganglia监控扩展]监控nginx的连接数 " src="https://simg.open-open.com/show/91a07c5475dd0457562dacadb476dfcf.png" width="500" height="226" /><br /> <img border="0" alt="" src="http://news.open-open.com/images/blogjava_net/henry14/nginx2.png" /><br /> </span> </div> <div> <span style="font-size:10pt;">如果需要看整个集群的监控画面，则需要做一些配置，如下：<br /> 在gmetad运行的机器上把下载到的graph.d下的文件复制到ganglia web页面目录下的graph.d目录下面。</span> <br /> <span style="font-size:10pt;">然后修改conf.php，找到</span> <span style="font-size:10pt;">$optional_graphs，去掉注释，修改为 $optional_graphs = array('</span> <span style="font-size:10pt;">nginx_accepts_ratio</span> <span style="font-size:10pt;">','</span> <span style="font-size:10pt;">nginx_scoreboard</span> <span style="font-size:10pt;">')，保存，刷新监控页面即可看到监控图（这个就不帖图了）。<br /> <br /> 第四步，定制自己的监控画面：<br /> 虽然插件提供了比较详细的监控画面，但我比较关注的是active、reading、writing和waiting这几个数据，并且在一张图形中显示。所以需要自己定制一个画图程序，在graph.d文件夹下新建一个叫nginx_report.php的文件，输入如下的内容（function的名称必须是graph_加上文件名）：</span> </div> <div> <div style="border-bottom:#cccccc 1px solid;border-left:#cccccc 1px solid;padding-bottom:4px;background-color:#eeeeee;padding-left:4px;width:98%;padding-right:5px;font-size:13px;word-break:break-all;border-top:#cccccc 1px solid;border-right:#cccccc 1px solid;padding-top:4px;"> <span style="color:#008080;"> 1</span> <?php <br /> <span style="color:#008080;"> 2</span> <br /> <span style="color:#008080;"> 3</span> <span style="color:#0000ff;">function</span> graph_nginx_report ( & <span style="color:#800080;">$rrdtool_graph</span> ) { <br /> <span style="color:#008080;"> 4</span> <br /> <span style="color:#008080;"> 5</span> <span style="color:#0000ff;">global</span> <span style="color:#800080;">$context</span>, <br /> <span style="color:#008080;"> 6</span> <span style="color:#800080;">$cpu_system_color</span>, <br /> <span style="color:#008080;"> 7</span> <span style="color:#800080;">$mem_swapped_color</span>, <br /> <span style="color:#008080;"> 8</span> <span style="color:#800080;">$mem_shared_color</span>, <br /> <span style="color:#008080;"> 9</span> <span style="color:#800080;">$mem_cached_color</span>, <br /> <span style="color:#008080;"> 10</span> <span style="color:#800080;">$mem_buffered_color</span>, <br /> <span style="color:#008080;"> 11</span> <span style="color:#800080;">$mem_used_color</span>, <br /> <span style="color:#008080;"> 12</span> <span style="color:#800080;">$hostname</span>, <br /> <span style="color:#008080;"> 13</span> <span style="color:#800080;">$range</span>, <br /> <span style="color:#008080;"> 14</span> <span style="color:#800080;">$rrd_dir</span>, <br /> <span style="color:#008080;"> 15</span> <span style="color:#800080;">$size</span>, <br /> <span style="color:#008080;"> 16</span> <span style="color:#800080;">$strip_domainname</span>, <br /> <span style="color:#008080;"> 17</span> <span style="color:#800080;">$graphreport_stats</span>; <br /> <span style="color:#008080;"> 18</span> <br /> <span style="color:#008080;"> 19</span> <span style="color:#0000ff;">if</span> ( <span style="color:#800080;">$strip_domainname</span>) { <br /> <span style="color:#008080;"> 20</span> <span style="color:#800080;">$hostname</span> = strip_domainname( <span style="color:#800080;">$hostname</span>); <br /> <span style="color:#008080;"> 21</span> } <br /> <span style="color:#008080;"> 22</span> <br /> <span style="color:#008080;"> 23</span> <span style="color:#800080;">$rrdtool_graph</span>['height'] += ( <span style="color:#800080;">$size</span> == 'medium') ? 28 : 0; <br /> <span style="color:#008080;"> 24</span> <span style="color:#0000ff;">if</span> ( <span style="color:#800080;">$graphreport_stats</span> ) { <br /> <span style="color:#008080;"> 25</span> <span style="color:#800080;">$rrdtool_graph</span>['height'] += ( <span style="color:#800080;">$size</span> == 'medium') ? 52 : 0; <br /> <span style="color:#008080;"> 26</span> <span style="color:#800080;">$rmspace</span> = '\\g'; <br /> <span style="color:#008080;"> 27</span> } <span style="color:#0000ff;">else</span> { <br /> <span style="color:#008080;"> 28</span> <span style="color:#800080;">$rmspace</span> = ''; <br /> <span style="color:#008080;"> 29</span> } <br /> <span style="color:#008080;"> 30</span> <br /> <span style="color:#008080;"> 31</span> <span style="color:#800080;">$title</span> = 'Nginx'; <br /> <span style="color:#008080;"> 32</span> <span style="color:#0000ff;">if</span> ( <span style="color:#800080;">$context</span> != 'host') { <br /> <span style="color:#008080;"> 33</span> <span style="color:#800080;">$rrdtool_graph</span>['title'] = <span style="color:#800080;">$title</span>; <br /> <span style="color:#008080;"> 34</span> } <span style="color:#0000ff;">else</span> { <br /> <span style="color:#008080;"> 35</span> <span style="color:#800080;">$rrdtool_graph</span>['title'] = "$hostname $title last $range"; <br /> <span style="color:#008080;"> 36</span> } <br /> <span style="color:#008080;"> 37</span> <br /> <span style="color:#008080;"> 38</span> <span style="color:#800080;">$rrdtool_graph</span>['lower-limit'] = '0'; <br /> <span style="color:#008080;"> 39</span> <span style="color:#800080;">$rrdtool_graph</span>['vertical-label'] = 'num/sec'; <br /> <span style="color:#008080;"> 40</span> <span style="color:#800080;">$rrdtool_graph</span>['extras'] = '--base 1024'; <br /> <span style="color:#008080;"> 41</span> <span style="color:#800080;">$rrdtool_graph</span>['extras'] .= ( <span style="color:#800080;">$graphreport_stats</span> == <span style="color:#0000ff;">true</span>) ? ' --font LEGEND:7' : ''; <br /> <span style="color:#008080;"> 42</span> <br /> <span style="color:#008080;"> 43</span> <span style="color:#0000ff;">if</span> ( <span style="color:#800080;">$size</span> == 'small') { <br /> <span style="color:#008080;"> 44</span> <span style="color:#800080;">$eol1</span> = '\\l'; <br /> <span style="color:#008080;"> 45</span> <span style="color:#800080;">$space1</span> = ' '; <br /> <span style="color:#008080;"> 46</span> <span style="color:#800080;">$space2</span> = ' '; <br /> <span style="color:#008080;"> 47</span> } <span style="color:#0000ff;">else</span> <span style="color:#0000ff;">if</span> ( <span style="color:#800080;">$size</span> == 'medium' || <span style="color:#800080;">$size</span> == 'default') { <br /> <span style="color:#008080;"> 48</span> <span style="color:#800080;">$eol1</span> = ''; <br /> <span style="color:#008080;"> 49</span> <span style="color:#800080;">$space1</span> = ' '; <br /> <span style="color:#008080;"> 50</span> <span style="color:#800080;">$space2</span> = ''; <br /> <span style="color:#008080;"> 51</span> } <span style="color:#0000ff;">else</span> <span style="color:#0000ff;">if</span> ( <span style="color:#800080;">$size</span> == 'large') { <br /> <span style="color:#008080;"> 52</span> <span style="color:#800080;">$eol1</span> = ''; <br /> <span style="color:#008080;"> 53</span> <span style="color:#800080;">$space1</span> = ' '; <br /> <span style="color:#008080;"> 54</span> <span style="color:#800080;">$space2</span> = ' '; <br /> <span style="color:#008080;"> 55</span> } <br /> <span style="color:#008080;"> 56</span> <br /> <span style="color:#008080;"> 57</span> <span style="color:#800080;">$series</span> = "DEF:'nginx_reading'='${rrd_dir}/nginx_reading.rrd':'sum':AVERAGE " <br /> <span style="color:#008080;"> 58</span> . "DEF:'nginx_writing'='${rrd_dir}/nginx_writing.rrd':'sum':AVERAGE " <br /> <span style="color:#008080;"> 59</span> . "DEF:'nginx_waiting'='${rrd_dir}/nginx_waiting.rrd':'sum':AVERAGE " <br /> <span style="color:#008080;"> 60</span> . "DEF:'nginx_active'='${rrd_dir}/nginx_active_connections.rrd':'sum':AVERAGE " <br /> <span style="color:#008080;"> 61</span> . "LINE2:'nginx_reading'#$mem_cached_color:'Reading${rmspace}' "; <br /> <span style="color:#008080;"> 62</span> <br /> <span style="color:#008080;"> 63</span> <span style="color:#0000ff;">if</span> ( <span style="color:#800080;">$graphreport_stats</span> ) { <br /> <span style="color:#008080;"> 64</span> <span style="color:#800080;">$series</span> .= "CDEF:nginxreading_pos=nginx_reading,0,INF,LIMIT " <br /> <span style="color:#008080;"> 65</span> . "VDEF:nginxreading_last=nginxreading_pos,LAST " <br /> <span style="color:#008080;"> 66</span> . "VDEF:nginxreading_min=nginxreading_pos,MINIMUM " <br /> <span style="color:#008080;"> 67</span> . "VDEF:nginxreading_avg=nginxreading_pos,AVERAGE " <br /> <span style="color:#008080;"> 68</span> . "VDEF:nginxreading_max=nginxreading_pos,MAXIMUM " <br /> <span style="color:#008080;"> 69</span> . "GPRINT:'nginxreading_last':' ${space1}Now\:%6.1lf%s' " <br /> <span style="color:#008080;"> 70</span> . "GPRINT:'nginxreading_min':'${space1}Min\:%6.1lf%s${eol1}' " <br /> <span style="color:#008080;"> 71</span> . "GPRINT:'nginxreading_avg':'${space2}Avg\:%6.1lf%s' " <br /> <span style="color:#008080;"> 72</span> . "GPRINT:'nginxreading_max':'${space1}Max\:%6.1lf%s\\l' "; <br /> <span style="color:#008080;"> 73</span> } <br /> <span style="color:#008080;"> 74</span> <br /> <span style="color:#008080;"> 75</span> <span style="color:#800080;">$series</span> .= "LINE2:'nginx_writing'#$mem_used_color:'Writing${rmspace}' "; <br /> <span style="color:#008080;"> 76</span> <br /> <span style="color:#008080;"> 77</span> <span style="color:#0000ff;">if</span> ( <span style="color:#800080;">$graphreport_stats</span> ) { <br /> <span style="color:#008080;"> 78</span> <span style="color:#800080;">$series</span> .= "CDEF:nginxwriting_pos=nginx_writing,0,INF,LIMIT " <br /> <span style="color:#008080;"> 79</span> . "VDEF:nginxwriting_last=nginxwriting_pos,LAST " <br /> <span style="color:#008080;"> 80</span> . "VDEF:nginxwriting_min=nginxwriting_pos,MINIMUM " <br /> <span style="color:#008080;"> 81</span> . "VDEF:nginxwriting_avg=nginxwriting_pos,AVERAGE " <br /> <span style="color:#008080;"> 82</span> . "VDEF:nginxwriting_max=nginxwriting_pos,MAXIMUM " <br /> <span style="color:#008080;"> 83</span> . "GPRINT:'nginxwriting_last':'${space1}Now\:%6.1lf%s' " <br /> <span style="color:#008080;"> 84</span> . "GPRINT:'nginxwriting_min':'${space1}Min\:%6.1lf%s${eol1}' " <br /> <span style="color:#008080;"> 85</span> . "GPRINT:'nginxwriting_avg':'${space2}Avg\:%6.1lf%s' " <br /> <span style="color:#008080;"> 86</span> . "GPRINT:'nginxwriting_max':'${space1}Max\:%6.1lf%s\\l' "; <br /> <span style="color:#008080;"> 87</span> } <br /> <span style="color:#008080;"> 88</span> <br /> <span style="color:#008080;"> 89</span> <span style="color:#800080;">$series</span> .= "LINE2:'nginx_waiting'#$mem_swapped_color:'Waiting${rmspace}' "; <br /> <span style="color:#008080;"> 90</span> <br /> <span style="color:#008080;"> 91</span> <span style="color:#0000ff;">if</span> ( <span style="color:#800080;">$graphreport_stats</span> ) { <br /> <span style="color:#008080;"> 92</span> <span style="color:#800080;">$series</span> .= "CDEF:nginxwaiting_pos=nginx_waiting,0,INF,LIMIT " <br /> <span style="color:#008080;"> 93</span> . "VDEF:nginxwaiting_last=nginxwaiting_pos,LAST " <br /> <span style="color:#008080;"> 94</span> . "VDEF:nginxwaiting_min=nginxwaiting_pos,MINIMUM " <br /> <span style="color:#008080;"> 95</span> . "VDEF:nginxwaiting_avg=nginxwaiting_pos,AVERAGE " <br /> <span style="color:#008080;"> 96</span> . "VDEF:nginxwaiting_max=nginxwaiting_pos,MAXIMUM " <br /> <span style="color:#008080;"> 97</span> . "GPRINT:'nginxwaiting_last':'${space1}Now\:%6.1lf%s' " <br /> <span style="color:#008080;"> 98</span> . "GPRINT:'nginxwaiting_min':'${space1}Min\:%6.1lf%s${eol1}' " <br /> <span style="color:#008080;"> 99</span> . "GPRINT:'nginxwaiting_avg':'${space2}Avg\:%6.1lf%s' " <br /> <span style="color:#008080;">100</span> . "GPRINT:'nginxwaiting_max':'${space1}Max\:%6.1lf%s\\l' "; <br /> <span style="color:#008080;">101</span> } <br /> <span style="color:#008080;">102</span> <br /> <span style="color:#008080;">103</span> <br /> <span style="color:#008080;">104</span> <br /> <span style="color:#008080;">105</span> <span style="color:#800080;">$series</span> .= "LINE2:'nginx_active'#$cpu_system_color:'Active${rmspace}' "; <br /> <span style="color:#008080;">106</span> <br /> <span style="color:#008080;">107</span> <span style="color:#0000ff;">if</span> ( <span style="color:#800080;">$graphreport_stats</span> ) { <br /> <span style="color:#008080;">108</span> <span style="color:#800080;">$series</span> .= "CDEF:nginxactive_pos=nginx_active,0,INF,LIMIT " <br /> <span style="color:#008080;">109</span> . "VDEF:nginxactive_last=nginxactive_pos,LAST " <br /> <span style="color:#008080;">110</span> . "VDEF:nginxactive_min=nginxactive_pos,MINIMUM " <br /> <span style="color:#008080;">111</span> . "VDEF:nginxactive_avg=nginxactive_pos,AVERAGE " <br /> <span style="color:#008080;">112</span> . "VDEF:nginxactive_max=nginxactive_pos,MAXIMUM " <br /> <span style="color:#008080;">113</span> . "GPRINT:'nginxactive_last':'${space1}Now\:%6.1lf%s' " <br /> <span style="color:#008080;">114</span> . "GPRINT:'nginxactive_min':'${space1}Min\:%6.1lf%s${eol1}' " <br /> <span style="color:#008080;">115</span> . "GPRINT:'nginxactive_avg':'${space2}Avg\:%6.1lf%s' " <br /> <span style="color:#008080;">116</span> . "GPRINT:'nginxactive_max':'${space1}Max\:%6.1lf%s\\l' "; <br /> <span style="color:#008080;">117</span> } <br /> <span style="color:#008080;">118</span> <br /> <span style="color:#008080;">119</span> <br /> <span style="color:#008080;">120</span> <span style="color:#800080;">$rrdtool_graph</span>['series'] = <span style="color:#800080;">$series</span>; <br /> <span style="color:#008080;">121</span> <br /> <span style="color:#008080;">122</span> <span style="color:#0000ff;">return</span> <span style="color:#800080;">$rrdtool_graph</span>; <br /> <span style="color:#008080;">123</span> } <br /> <span style="color:#008080;">124</span> ?> </div> <span style="font-size:12px;">完成后保存文件，在conf.php中</span> <span style="font-size:13px;">$optional_graphs数组里添加一个元素'nginx'（文件名的_report.php之前的部分），刷新监控页面即可看到整个集群的nginx连接数信息。<br /> <img title="[Ganglia监控扩展]监控nginx的连接数 " border="0" alt="[Ganglia监控扩展]监控nginx的连接数 " src="https://simg.open-open.com/show/45288f37ee30beb78fe16baaa46b2ceb.png" width="399" height="267" /><br /> 如上，便完成了在ganglia中集成nginx监控的所有工作。<br /> <br /> </span> </div>