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1 | /* | |
2 | Copyright (C) 2002 - 2007 PowerDNS.COM BV | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License version 2 | |
6 | as published by the Free Software Foundation | |
7 | ||
8 | This program is distributed in the hope that it will be useful, | |
9 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | GNU General Public License for more details. | |
12 | ||
13 | You should have received a copy of the GNU General Public License | |
14 | along with this program; if not, write to the Free Software | |
15 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | #include "utility.hh" | |
18 | #include "ws.hh" | |
19 | #include "webserver.hh" | |
20 | #include "logger.hh" | |
21 | #include "statbag.hh" | |
22 | #include "misc.hh" | |
23 | #include "arguments.hh" | |
24 | #include "dns.hh" | |
25 | #include <boost/format.hpp> | |
26 | ||
27 | extern StatBag S; | |
28 | ||
29 | StatWebServer::StatWebServer() | |
30 | { | |
31 | d_start=time(0); | |
32 | d_min10=d_min5=d_min1=0; | |
33 | d_ws = new WebServer(arg()["webserver-address"], arg().asNum("webserver-port"),arg()["webserver-password"]); | |
34 | } | |
35 | ||
36 | void StatWebServer::go() | |
37 | { | |
38 | S.doRings(); | |
39 | pthread_create(&d_tid, 0, threadHelper, this); | |
40 | pthread_create(&d_tid, 0, statThreadHelper, this); | |
41 | } | |
42 | ||
43 | void StatWebServer::statThread() | |
44 | { | |
45 | try { | |
46 | for(;;) { | |
47 | d_queries.submit(S.read("udp-queries")); | |
48 | d_cachehits.submit(S.read("packetcache-hit")); | |
49 | d_cachemisses.submit(S.read("packetcache-miss")); | |
50 | d_qcachehits.submit(S.read("query-cache-hit")); | |
51 | d_qcachemisses.submit(S.read("query-cache-miss")); | |
52 | Utility::sleep(1); | |
53 | } | |
54 | } | |
55 | catch(...) { | |
56 | L<<Logger::Error<<"Webserver statThread caught an exception, dying"<<endl; | |
57 | exit(1); | |
58 | } | |
59 | } | |
60 | ||
61 | void *StatWebServer::statThreadHelper(void *p) | |
62 | { | |
63 | StatWebServer *sws=static_cast<StatWebServer *>(p); | |
64 | sws->statThread(); | |
65 | return 0; // never reached | |
66 | } | |
67 | ||
68 | ||
69 | void *StatWebServer::threadHelper(void *p) | |
70 | { | |
71 | StatWebServer *sws=static_cast<StatWebServer *>(p); | |
72 | sws->launch(); | |
73 | return 0; // never reached | |
74 | } | |
75 | ||
76 | void printtable(ostringstream &ret, const string &ringname, const string &title, int limit=10) | |
77 | { | |
78 | int tot=0; | |
79 | int entries=0; | |
80 | vector<pair <string,int> >ring=S.getRing(ringname); | |
81 | ||
82 | for(vector<pair<string,int> >::const_iterator i=ring.begin(); i!=ring.end();++i) { | |
83 | tot+=i->second; | |
84 | entries++; | |
85 | } | |
86 | ||
87 | ||
88 | ret<<"<table border=1><tr><td colspan=3 bgcolor=#0000ff>" | |
89 | "<a href=?ring="<<ringname<<"><font color=#ffffff>Top-"<<limit<<" of "; | |
90 | ret<<entries<<": "<<title<<"</a></td>"<<endl; | |
91 | ||
92 | ret<<"<tr><td colspan=3><table bgcolor=#ff0000 width=100%><tr><td align=left>" | |
93 | "<a href=?resetring="<<ringname<<"><font color=#ffffff>Reset</a></td>"; | |
94 | ret<<"<td align=right>Resize: "; | |
95 | ||
96 | int sizes[]={10,100,500,1000,10000,500000,0}; | |
97 | for(int i=0;sizes[i];++i) { | |
98 | if(S.getRingSize(ringname)!=sizes[i]) | |
99 | ret<<"<a href=?resizering="<<ringname<<"&size="<<sizes[i]<<">"<<sizes[i]<<"</a> "; | |
100 | else | |
101 | ret<<"("<<sizes[i]<<") "; | |
102 | } | |
103 | ret<<"</td></table>"<<endl; | |
104 | ||
105 | ||
106 | int printed=0; | |
107 | for(vector<pair<string,int> >::const_iterator i=ring.begin();limit && i!=ring.end();++i,--limit) { | |
108 | ret<<"<tr><td>"<<i->first<<"</td><td>"<<i->second<<"</td><td align=right>"<< StatWebServer::makePercentage(i->second*100.0/tot)<<"</td>"<<endl; | |
109 | printed+=i->second; | |
110 | } | |
111 | ret<<"<tr><td colspan=3></td></tr>"<<endl; | |
112 | if(printed!=tot) | |
113 | ret<<"<tr><td><b>Rest:</b></td><td><b>"<<tot-printed<<"</b></td><td align=right><b>"<< StatWebServer::makePercentage((tot-printed)*100.0/tot)<<"</b></td>"<<endl; | |
114 | ||
115 | ret<<"<tr><td><b>Total:</b></td><td><b>"<<tot<<"</td><td align=right><b>100%</b></td>"; | |
116 | ret<<"</table><p>"<<endl; | |
117 | } | |
118 | ||
119 | void StatWebServer::printvars(ostringstream &ret) | |
120 | { | |
121 | ret<<"<table border=1><tr><td colspan=3 bgcolor=#0000ff><font color=#ffffff>Variables</td>"<<endl; | |
122 | ||
123 | ||
124 | vector<string>entries=S.getEntries(); | |
125 | for(vector<string>::const_iterator i=entries.begin();i!=entries.end();++i) { | |
126 | ret<<"<tr><td>"<<*i<<"</td><td>"<<S.read(*i)<<"</td><td>"<<S.getDescrip(*i)<<"</td>"<<endl; | |
127 | } | |
128 | } | |
129 | ||
130 | void StatWebServer::printargs(ostringstream &ret) | |
131 | { | |
132 | ret<<"<table border=1><tr><td colspan=3 bgcolor=#0000ff><font color=#ffffff>Arguments</td>"<<endl; | |
133 | ||
134 | vector<string>entries=arg().list(); | |
135 | for(vector<string>::const_iterator i=entries.begin();i!=entries.end();++i) { | |
136 | ret<<"<tr><td>"<<*i<<"</td><td>"<<arg()[*i]<<"</td><td>"<<arg().getHelp(*i)<<"</td>"<<endl; | |
137 | } | |
138 | } | |
139 | ||
140 | string StatWebServer::makePercentage(const double& val) | |
141 | { | |
142 | return (boost::format("%.01f%%") % val).str(); | |
143 | } | |
144 | ||
145 | string StatWebServer::indexfunction(const map<string,string> &varmap, void *ptr, bool *custom) | |
146 | { | |
147 | ||
148 | StatWebServer *sws=static_cast<StatWebServer *>(ptr); | |
149 | map<string,string>rvarmap=varmap; | |
150 | if(!rvarmap["resetring"].empty()){ | |
151 | *custom=true; | |
152 | S.resetRing(rvarmap["resetring"]); | |
153 | return "HTTP/1.1 301 Moved Permanently\nLocation: /\nConnection: close\n\n"; | |
154 | } | |
155 | if(!rvarmap["resizering"].empty()){ | |
156 | *custom=true; | |
157 | S.resizeRing(rvarmap["resizering"], atoi(rvarmap["size"].c_str())); | |
158 | return "HTTP/1.1 301 Moved Permanently\nLocation: /\nConnection: close\n\n"; | |
159 | } | |
160 | ||
161 | ostringstream ret; | |
162 | ||
163 | ret<<"<html><head><title>PowerDNS Operational Monitor</title></head><body bgcolor=#ffffff>"<<endl; | |
164 | ||
165 | ||
166 | ret<<"<h2>"; | |
167 | if(!arg()["config-name"].empty()) | |
168 | ret<<"["<<arg()["config-name"]<<"]"; | |
169 | if(rvarmap["ring"].empty()) | |
170 | ret<<"PDNS "VERSION" Main Page</h2>"<<endl; | |
171 | else | |
172 | ret<<"Details page</h2><a href=/>Back to main page</a><p>"<<endl; | |
173 | ||
174 | time_t passed=time(0)-s_starttime; | |
175 | ||
176 | ret<<"Uptime: "; | |
177 | ret<<humanDuration(passed)<<endl; | |
178 | ||
179 | ||
180 | ret<<"Queries/second, 1, 5, 10 minute averages: "<<std::setprecision(3)<< | |
181 | sws->d_queries.get1()<<", "<< | |
182 | sws->d_queries.get5()<<", "<< | |
183 | sws->d_queries.get10()<<". Max queries/second: "<<sws->d_queries.getMax()<< | |
184 | "<br>"<<endl; | |
185 | ||
186 | if(sws->d_cachemisses.get10()+sws->d_cachehits.get10()>0) | |
187 | ret<<"Cache hitrate, 1, 5, 10 minute averages: "<< | |
188 | makePercentage((sws->d_cachehits.get1()*100.0)/((sws->d_cachehits.get1())+(sws->d_cachemisses.get1())))<<", "<< | |
189 | makePercentage((sws->d_cachehits.get5()*100.0)/((sws->d_cachehits.get5())+(sws->d_cachemisses.get5())))<<", "<< | |
190 | makePercentage((sws->d_cachehits.get10()*100.0)/((sws->d_cachehits.get10())+(sws->d_cachemisses.get10())))<< | |
191 | "<br>"<<endl; | |
192 | ||
193 | if(sws->d_qcachemisses.get10()+sws->d_qcachehits.get10()>0) | |
194 | ret<<"Backend query cache hitrate, 1, 5, 10 minute averages: "<<std::setprecision(2)<< | |
195 | makePercentage((sws->d_qcachehits.get1()*100.0)/((sws->d_qcachehits.get1())+(sws->d_qcachemisses.get1())))<<", "<< | |
196 | makePercentage((sws->d_qcachehits.get5()*100.0)/((sws->d_qcachehits.get5())+(sws->d_qcachemisses.get5())))<<", "<< | |
197 | makePercentage((sws->d_qcachehits.get10()*100.0)/((sws->d_qcachehits.get10())+(sws->d_qcachemisses.get10())))<< | |
198 | "<br>"<<endl; | |
199 | ||
200 | ret<<"Backend query load, 1, 5, 10 minute averages: "<<std::setprecision(3)<< | |
201 | sws->d_qcachemisses.get1()<<", "<< | |
202 | sws->d_qcachemisses.get5()<<", "<< | |
203 | sws->d_qcachemisses.get10()<<". Max queries/second: "<<sws->d_qcachemisses.getMax()<< | |
204 | "<br>"<<endl; | |
205 | ||
206 | ret<<"Total queries: "<<S.read("udp-queries")<<". Question/answer latency: "<<S.read("latency")/1000.0<<"ms<p>"<<endl; | |
207 | if(rvarmap["ring"].empty()) { | |
208 | vector<string>entries=S.listRings(); | |
209 | for(vector<string>::const_iterator i=entries.begin();i!=entries.end();++i) | |
210 | printtable(ret,*i,S.getRingTitle(*i)); | |
211 | ||
212 | sws->printvars(ret); | |
213 | if(arg().mustDo("webserver-print-arguments")) | |
214 | sws->printargs(ret); | |
215 | } | |
216 | else | |
217 | printtable(ret,rvarmap["ring"],S.getRingTitle(rvarmap["ring"]),100); | |
218 | ||
219 | ret<<"</body></html>"<<endl; | |
220 | ||
221 | return ret.str(); | |
222 | } | |
223 | ||
224 | void StatWebServer::launch() | |
225 | { | |
226 | try { | |
227 | ||
228 | d_ws->setCaller(this); | |
229 | d_ws->registerHandler("",&indexfunction); | |
230 | d_ws->go(); | |
231 | } | |
232 | catch(...) { | |
233 | L<<Logger::Error<<"StatWebserver thread caught an exception, dying"<<endl; | |
234 | exit(1); | |
235 | } | |
236 | } |