cgi

   1 #!/usr/bin/perl -w
   2
   3 use strict qw(vars);
   4 use CGI qw/:standard/;
   5
   6 sub fail ($) {
   7     print(header(-status=>500),
   8           start_html('Error'),
   9           h1('Error'),
  10           escapeHTML($_[0]),
  11           end_html());
  12     exit 0;
  13 }
  14
  15 our $R= '/var/lib/collectd/rrd/chiark.greenend.org.uk';
  16 our $SELF= '/home/ijackson/things/rrd-graphs';
  17
  18 my $self= url(-relative=>1);
  19
  20 our (@sections, %section_groups, %group_elems, %graphs);
  21
  22 our @timeranges= (3600, map { $_*86400 } qw(1 7 28), 13*7+1, 366);
  23
  24 sub graph_of_group ($$$$$) {
  25     my ($section, $group, $elem, $basis, $args) = @_;
  26     $basis->{Args}= $args;
  27     $basis->{Slower}= 0 unless exists $basis->{Slower};
  28
  29     $graphs{$section,$group,$elem}= $basis;
  30     if (!exists $group_elems{$section,$group}) {
  31         # new group then
  32         if (!exists $section_groups{$section}) {
  33             # new section even
  34             push @sections, $section;
  35         }
  36         push @{ $section_groups{$section} }, $group;
  37     }
  38     push @{ $group_elems{$section,$group} }, $elem;
  39 }
  40
  41 sub graph ($$$$) {
  42     my ($section, $gname, $basis, $args) = @_;
  43     graph_of_group($section, $gname,'', $basis, $args);
  44 }
  45
  46 graph('General', 'Load', { },
  47       [
  48        "DEF:load=$R/load/load.rrd:shortterm:AVERAGE",
  49        (map { "DEF:$_=$R/processes/ps_state-$_.rrd:value:AVERAGE" }
  50             qw(blocked running stopped paging sleeping zombies)),
  51        "AREA:running#88f:running processes:STACK",
  52        "AREA:blocked#8f8:blocked processes:STACK",
  53        "AREA:paging#f88:paging processes:STACK",
  54        "LINE:load#000:load",
  55        ]);
  56
  57 graph('General', 'Processes', { },
  58       [
  59        (map { "DEF:$_=$R/processes/ps_state-$_.rrd:value:AVERAGE" }
  60             qw(blocked running stopped paging sleeping zombies)),
  61        "CDEF:busy=0".(join '', map { ",$_,+" } qw(running blocked paging)),
  62        "AREA:sleeping#ccc:sleeping:STACK",
  63        "AREA:stopped#00f:stopped:STACK",
  64        "AREA:zombies#ff0:zombie:STACK",
  65        "AREA:busy#000:busy:STACK",
  66        ]);
  67
  68 graph('General', 'CPU', { Units => '[%]' },
  69       [
  70        (map {
  71            my $thing= $_;
  72            (map { "DEF:$thing$_=$R/cpu-$_/cpu-$thing.rrd:value:AVERAGE" }
  73                 (0..7)),
  74            "CDEF:$thing=0".join('', map { ",$thing$_,+" } (0..7)).",8.0,/";
  75        } qw(idle interrupt nice softirq steal system user wait)),
  76        "AREA:system#00f:system:STACK",
  77        "AREA:wait#f88:wait:STACK",
  78        "AREA:nice#ccc:nice:STACK",
  79        "AREA:user#080:user:STACK",
  80        "AREA:softirq#f0f:softirq:STACK",
  81        "AREA:interrupt#ff0:interrupt:STACK",
  82        "AREA:steal#0ff:steal:STACK",
  83        ]);
  84
  85 graph('General', 'Memory', { },
  86       [ '-b',1024,
  87        (map { "DEF:swap_$_=$R/swap/swap-$_.rrd:value:AVERAGE" }
  88             qw(free used cached)),
  89        (map { "DEF:mem_$_=$R/memory/memory-$_.rrd:value:AVERAGE" }
  90             qw(buffered free used cached)),
  91        "CDEF:c_swap_used=0,swap_used,-",
  92        "CDEF:c_swap_cached=0,swap_cached,-",
  93        "CDEF:c_swap_free=0,swap_free,-",
  94        "AREA:c_swap_used#000:used swap",
  95        "AREA:c_swap_cached#888:\"cached\" swap:STACK",
  96 #       "AREA:c_swap_free#88f:free swap:STACK",
  97        "AREA:mem_used#ff0:used memory",
  98        "AREA:mem_buffered#00f:page cache:STACK",
  99        "AREA:mem_cached#008:buffer cache:STACK",
 100        "AREA:mem_free#ccc:unused memory:STACK",
 101        ]);
 102
 103 graph('General', 'Network', { Units => '[/sec; tx +ve; errs x1000]' },
 104       [
 105        (map {
 106            ("DEF:tx_$_=$R/interface/if_$_-eth0.rrd:tx:AVERAGE",
 107             "DEF:rx_$_=$R/interface/if_$_-eth0.rrd:rx:AVERAGE",
 108             "CDEF:mrx_$_=0,rx_$_,-")
 109            } qw(octets packets errors)),
 110        (map {
 111            ("CDEF:${_}_kb=${_}_octets,1024,/",
 112             "CDEF:${_}_errsx=${_}_errors,1000,*")
 113            } qw(mrx tx)),
 114        "AREA:tx_kb#080:kby",
 115        "LINE:tx_packets#0f0:pkts",
 116        "LINE:tx_errsx#000:errs",
 117        "AREA:mrx_kb#008:kby",
 118        "LINE:mrx_packets#00f:pkts",
 119        "LINE:mrx_errsx#444:errs",
 120       ]);
 121
 122 graph('General', 'Users', {  },
 123       [
 124        "DEF:users=$R/users/users.rrd:users:AVERAGE",
 125        "LINE:users#008:users"
 126        ]);
 127
 128 foreach my $src (<$R/df/df-*.rrd>) {
 129     my $vol= $src;
 130     $vol =~ s,\.rrd$,, or next;
 131     $vol =~ s,.*/,,;
 132     $vol =~ s,^df-,,;
 133     graph('Disk space', $vol, {
 134              Slower => 1,
 135           },
 136           [ '-A','-l',0,'-r',
 137            qw(-b 1024 -l 0),
 138            (map { "DEF:$_=$src:$_:AVERAGE" } qw(free used)),
 139            "AREA:used#000:used:STACK",
 140            "AREA:free#88f:free:STACK",
 141            ]);
 142 }
 143
 144 foreach my $src (<$SELF/data/news/*.rrd>) {
 145     my $site= $src;
 146     $site =~ s,\.rrd$,, or next;
 147     $site =~ s,.*/,,;
 148     $site =~ s,_(in|out)$,,;
 149     my $inout= $1;
 150     $site =~ s/^([-.0-9a-z]+)_//;
 151     my $us= $1; # all very well but we ignore it
 152     graph_of_group("News", $site, $inout,
 153           {
 154                 Slower => 1,
 155                 Units => '[art/s]'
 156             }, $inout eq 'out' ?
 157           [
 158            (map { "DEF:$_=$src:$_:AVERAGE" }
 159                 qw(missing offered deferred unwanted accepted
 160                    rejected body_missing)),
 161            "AREA:accepted#00f:ok",
 162            "AREA:body_missing#ff0:missing:STACK",
 163            "AREA:rejected#f00:rej:STACK",
 164            "AREA:unwanted#bbb:unw:STACK",
 165            "AREA:deferred#eee:deferred:STACK",
 166            "LINE:offered#080:",
 167            ] :
 168           [
 169            (map { "DEF:$_=$src:$_:AVERAGE" }
 170                 qw(accepted refused rejected duplicate)),
 171            (map { ("DEF:bytes_$_=$src:${_}_size:AVERAGE",
 172                    "CDEF:kb_$_=bytes_$_,1024,/")
 173               } qw(accepted duplicate)),
 174            "AREA:accepted#00f:ok:STACK",
 175            "AREA:rejected#f00:rej:STACK",
 176            "AREA:duplicate#000:dupe:STACK",
 177            "AREA:refused#bbb:unw:STACK",
 178            "LINE:kb_duplicate#ff0:kb dupe",
 179            "LINE:kb_accepted#008:kb",
 180            ]);
 181 }
 182
 183 if (param('debug')) {
 184     print "Content-Type: text/plain\n\n";
 185 }
 186
 187 our @navsettings;
 188
 189 sub navsetting ($) {
 190     my ($nav) = @_;
 191     my $var= $nav->{Variable};
 192     $$var= param($nav->{Param});
 193     $$var= $nav->{Default} if !defined $$var;
 194     die $nav->{Param} unless grep { $_ eq $$var } @{ $nav->{Values} };
 195     push @navsettings, $nav;
 196 }
 197
 198 our $section;
 199
 200 navsetting({
 201     Desc => 'Section',
 202     Param => 'section',
 203     Variable => \$section,
 204     Default => $sections[0],
 205     Values => [@sections],
 206     Show => sub { return $_[0]; }
 207 });
 208
 209
 210 sub num_param ($$$$) {
 211     my ($param,$def,$min,$max) = @_;
 212     my $v= param($param);
 213     return $def if !defined $v;
 214     $v =~ m/^([1-9]\d{0,8})$/ or die;
 215     $v= $1;
 216     die unless $v >= $min && $v <= $max;
 217     return $v + 0;
 218 }
 219
 220 my $group= param('graph');
 221
 222 my $elem= param('elem');
 223 if (defined $elem) {
 224     my $g= $graphs{$section,$group,$elem};
 225     die unless $g;
 226
 227     my @args= @{ $g->{Args} };
 228
 229     my $width= num_param('w',370,100,1600);
 230     my $height= num_param('h',200,100,1600);
 231
 232     my $sloth= param('sloth');
 233     die unless defined $sloth;
 234     $sloth =~ m/^(\d+)$/ or die;
 235     my $end= $timeranges[$sloth];
 236     die unless defined $end;
 237     unshift @args, qw(--end now --start), "end-${end}s";
 238
 239     if (param('debug')) {
 240         print((join "\n",@args),"\n"); exit 0;
 241     }
 242     print "Content-Type: image/png\n\n";
 243
 244     my $title= $group;
 245     if (length $elem) { $title.= " $elem"; }
 246
 247     $title .= " $g->{Units}" if $g->{Units};
 248     unshift @args, '-t', $title;
 249
 250     exec (qw(rrdtool graph - -a PNG --full-size-mode),
 251           '-w',$width, '-h',$height,
 252           @args);
 253     die $!;
 254 }
 255
 256 sub start_page ($) {
 257     my ($title) = @_;
 258     print header(), start_html($title);
 259     my $outerdelim= '';
 260     foreach my $nav (@navsettings) {
 261         print $outerdelim;
 262         print $nav->{Desc}, ": ";
 263         my $delim= '';
 264         my $current= $nav->{Variable};  $current= $$current;
 265         foreach my $couldbe (@{ $nav->{Values} }) {
 266             print $delim;
 267             my $show= $nav->{Show}($couldbe);
 268             if ($couldbe eq $current) {
 269                 print "<b>$show</b>";
 270             } else {
 271                 print "<a href=\"$self";
 272                 my $delim2= '?';
 273                 foreach my $nav2 (@navsettings) {
 274                     my $current2= $nav2->{Variable};  $current2= $$current2;
 275                     $current2= $couldbe if $nav2->{Param} eq $nav->{Param};
 276                     next if $current2 eq $nav2->{Default};
 277                     print $delim2, "$nav2->{Param}=$current2";
 278                     $delim2= '&';
 279                 }
 280                 print "\">$show</a>";
 281             }
 282             $delim= ' | ';
 283         }
 284         $outerdelim= "<br>\n";
 285     }
 286     print "\n";
 287
 288     print h1("$title");
 289 }
 290
 291 my $detail= param('detail');
 292 if ($detail) {
 293     my $elems= $group_elems{$section,$detail};
 294     die unless $elems;
 295     start_page("$detail graphs");
 296     foreach my $xsloth (0..5) {
 297         foreach my $elem (@$elems) {
 298             my $g= $graphs{$section,$detail,$elem};
 299             die unless $g;
 300             my $tsloth= $xsloth + $g->{Slower};
 301             my $imgurl= "$self?graph=$detail&section=$section".
 302                 "&sloth=$tsloth&elem=$elem";
 303             print "<a href=\"$imgurl&w=780&h=800\">";
 304             print "<img src=\"$imgurl\"></a>\n";
 305         }
 306     }
 307     print end_html();
 308     exit 0;
 309 }
 310
 311 our $sloth;
 312
 313 navsetting({
 314     Desc => 'Time interval',
 315     Param => 'sloth',
 316     Variable => \$sloth,
 317     Default => 1,
 318     Values => [0..3],
 319     Show => sub {
 320         my ($sl) = @_;
 321         return ('Narrower', 'Normal', 'Wider', 'Extra wide')[$sl];
 322     }
 323 });
 324
 325 if (param('debug')) {
 326     use Data::Dumper;
 327     print Dumper(\%graphs);
 328     exit 0;
 329 }
 330
 331 start_page("$section graphs");
 332
 333 foreach my $group (@{ $section_groups{$section} }) {
 334     print "<a href=\"$self?detail=$group&section=$section\">";
 335     my $imgurl= "$self?graph=$group&section=$section";
 336     my $elems= $group_elems{$section,$group};
 337     if (@$elems > 1) { print "<table><tr><td>"; }
 338     foreach my $elem (@$elems) {
 339         my $g= $graphs{$section,$group,$elem};
 340         print "<img src=\"$imgurl&elem=$elem&sloth=".
 341             ($sloth + $g->{Slower})."\">";
 342     }
 343     if (@$elems > 1) { print "</td></tr></table>"; }
 344     print "</a>\n";
 345 }
 346