#!/usr/bin/perl -w
use strict qw(vars);
use CGI qw/:standard/;
sub fail ($) {
print(header(-status=>500),
start_html('Error'),
h1('Error'),
escapeHTML($_[0]),
end_html());
exit 0;
}
our $R= '/var/lib/collectd/rrd/chiark.greenend.org.uk';
my $self= url(-relative=>1);
our (@sections, %sections, %graphs);
our @timeranges= (3600, map { $_*86400 } qw(1 7 28), 13*7+1);
sub graph ($$$$) {
my ($section, $gname, $basis, $args) = @_;
$basis->{Args}= $args;
$basis->{Slower}= 0 unless exists $basis->{Slower};
$graphs{$section,$gname}= $basis;
if (!exists $sections{$section}) {
push @sections, $section;
}
push @{ $sections{$section} }, $gname;
}
graph('General', 'Load', { },
[
"DEF:load=$R/load/load.rrd:shortterm:AVERAGE",
(map { "DEF:$_=$R/processes/ps_state-$_.rrd:value:AVERAGE" }
qw(blocked running stopped paging sleeping zombies)),
"AREA:running#88f:running processes:STACK",
"AREA:blocked#8f8:blocked processes:STACK",
"AREA:paging#f88:paging processes:STACK",
"LINE:load#000:load",
]);
graph('General', 'Processes', { },
[
(map { "DEF:$_=$R/processes/ps_state-$_.rrd:value:AVERAGE" }
qw(blocked running stopped paging sleeping zombies)),
"CDEF:busy=0".(join '', map { ",$_,+" } qw(running blocked paging)),
"AREA:sleeping#ccc:sleeping:STACK",
"AREA:stopped#00f:stopped:STACK",
"AREA:zombies#ff0:zombie:STACK",
"AREA:busy#000:busy:STACK",
]);
graph('General', 'CPU', { Units => '[%]' },
[
(map {
my $thing= $_;
(map { "DEF:$thing$_=$R/cpu-$_/cpu-$thing.rrd:value:AVERAGE" }
(0..7)),
"CDEF:$thing=0".join('', map { ",$thing$_,+" } (0..7)).",8.0,/";
} qw(idle interrupt nice softirq steal system user wait)),
"AREA:system#00f:system:STACK",
"AREA:wait#f88:wait:STACK",
"AREA:nice#ccc:nice:STACK",
"AREA:user#080:user:STACK",
"AREA:softirq#f0f:softirq:STACK",
"AREA:interrupt#ff0:interrupt:STACK",
"AREA:steal#0ff:steal:STACK",
]);
graph('General', 'Memory', { },
[ '-b',1024,
(map { "DEF:swap_$_=$R/swap/swap-$_.rrd:value:AVERAGE" }
qw(free used cached)),
(map { "DEF:mem_$_=$R/memory/memory-$_.rrd:value:AVERAGE" }
qw(buffered free used cached)),
"CDEF:c_swap_used=0,swap_used,-",
"CDEF:c_swap_cached=0,swap_cached,-",
"CDEF:c_swap_free=0,swap_free,-",
"AREA:c_swap_used#000:used swap",
"AREA:c_swap_cached#888:\"cached\" swap:STACK",
# "AREA:c_swap_free#88f:free swap:STACK",
"AREA:mem_used#ff0:used memory",
"AREA:mem_buffered#00f:page cache:STACK",
"AREA:mem_cached#008:buffer cache:STACK",
"AREA:mem_free#ccc:unused memory:STACK",
]);
graph('General', 'Network', { Units => '[/sec; tx +ve; errs x1000]' },
[
(map {
("DEF:tx_$_=$R/interface/if_$_-eth0.rrd:tx:AVERAGE",
"DEF:rx_$_=$R/interface/if_$_-eth0.rrd:rx:AVERAGE",
"CDEF:mrx_$_=0,rx_$_,-")
} qw(octets packets errors)),
(map {
("CDEF:${_}_kb=${_}_octets,1024,/",
"CDEF:${_}_errsx=${_}_errors,1000,*")
} qw(mrx tx)),
"AREA:tx_kb#080:kby",
"LINE:tx_packets#0f0:pkts",
"LINE:tx_errsx#000:errs",
"AREA:mrx_kb#008:kby",
"LINE:mrx_packets#00f:pkts",
"LINE:mrx_errsx#444:errs",
]);
graph('General', 'Users', { },
[
"DEF:users=$R/users/users.rrd:users:AVERAGE",
"LINE:users#008:users"
]);
foreach my $src (<$R/df/df-*.rrd>) {
my $vol= $src;
$vol =~ s,.*/,,;
$vol =~ s,^df-,,;
$vol =~ s,\.rrd$,,;
graph('Disk space', $vol, {
Slower => 1,
},
[ '-A','-l',0,'-r',
qw(-b 1024 -l 0),
(map { "DEF:$_=$src:$_:AVERAGE" } qw(free used)),
"AREA:used#000:used:STACK",
"AREA:free#88f:free:STACK",
]);
}
if (param('debug')) {
print "Content-Type: text/plain\n\n";
}
our @navsettings;
sub navsetting ($) {
my ($nav) = @_;
my $var= $nav->{Variable};
$$var= param($nav->{Param});
$$var= $nav->{Default} if !defined $$var;
die $nav->{Param} unless grep { $_ eq $$var } @{ $nav->{Values} };
push @navsettings, $nav;
}
our $section;
navsetting({
Desc => 'Section',
Param => 'section',
Variable => \$section,
Default => $sections[0],
Values => [@sections],
Show => sub { return $_[0]; }
});
my $gname= param('graph');
sub num_param ($$$$) {
my ($param,$def,$min,$max) = @_;
my $v= param($param);
return $def if !defined $v;
$v =~ m/^([1-9]\d{0,8})$/ or die;
$v= $1;
die unless $v >= $min && $v <= $max;
return $v + 0;
}
if ($gname) {
my $g= $graphs{$section,$gname};
die unless $g;
my @args= @{ $g->{Args} };
my $width= num_param('w',370,100,1600);
my $height= num_param('h',200,100,1600);
my $end= param('end');
if (defined $end) {
$end =~ m/^(\d+)$/ or die;
unshift @args, qw(--end now --start), "end-${end}s";
}
if (param('debug')) {
print((join "\n",@args),"\n"); exit 0;
}
print "Content-Type: image/png\n\n";
my $title= $gname;
$title .= " $g->{Units}" if $g->{Units};
unshift @args, '-t', $title;
exec (qw(rrdtool graph - -a PNG --full-size-mode),
'-w',$width, '-h',$height,
@args);
die $!;
}
sub start_page ($) {
my ($title) = @_;
print header(), start_html($title);
my $outerdelim= '';
foreach my $nav (@navsettings) {
print $outerdelim;
print $nav->{Desc}, ": ";
my $delim= '';
my $current= $nav->{Variable}; $current= $$current;
foreach my $couldbe (@{ $nav->{Values} }) {
print $delim;
my $show= $nav->{Show}($couldbe);
if ($couldbe eq $current) {
print "$show";
} else {
print "{Variable}; $current2= $$current2;
$current2= $couldbe if $nav2->{Param} eq $nav->{Param};
next if $current2 eq $nav2->{Default};
print $delim2, "$nav2->{Param}=$current2";
$delim2= '&';
}
print "\">$show";
}
$delim= ' | ';
}
$outerdelim= "
\n";
}
print "\n";
print h1("$title");
}
my $detail= param('detail');
if ($detail) {
my $g= $graphs{$section,$detail};
die unless $g;
start_page("$detail graphs");
foreach my $end (@timeranges[$g->{Slower}..$g->{Slower}+3]) {
my $imgurl= "$self?graph=$detail§ion=$section&end=$end";
print "\n";
}
print end_html();
exit 0;
}
our $sloth;
navsetting({
Desc => 'Time interval',
Param => 'sloth',
Variable => \$sloth,
Default => 1,
Values => [0..2],
Show => sub {
my ($sl) = @_;
return ('Narrower', 'Normal', 'Wider')[$sl];
}
});
if (param('debug')) {
use Data::Dumper;
print Dumper(\%graphs);
exit 0;
}
start_page("$section graphs");
foreach my $gname (@{ $sections{$section} }) {
my $g= $graphs{$section,$gname};
print "";
my $end= $timeranges[$g->{Slower}+$sloth];
my $imgurl= "$self?graph=$gname§ion=$section&end=$end";
print "\n";
}