7 my $DEBUG = $ENV{DEBUG} || 0;
8 my $INFLUX = $ENV{INFLUX} || 'http://10.80.3.89:8086/write?db=gnt';
9 my $INTERVAL = $ENV{INTERVAL} || 1;
11 my $RACK = $ENV{RACK};
13 my $node = `hostname -s`;
17 $location .= qq{,dc=$DC} if $DC;
18 $location .= qq{,rack=$RACK} if $RACK;
20 warn $0 = "gnt-monitor\@$node$location $INFLUX $INTERVAL $DEBUG";
23 sub XXX { $DEBUG ? warn "XXX ",Data::Dump::dump( @_ ) : {} };
32 foreach my $instance ( glob '/var/run/ganeti/kvm-hypervisor/pid/*' ) {
34 open(my $fh, '<', $instance);
35 my $pid = <$fh>; chomp $pid;
37 $instance =~ s{^.*/}{};
39 if ( ! -d "/proc/$pid" ) {
45 my $vcpu = $last->{$instance}->{vcpu};
48 foreach my $fd ( glob "/proc/$pid/fd/*" ) {
49 $vcpu++ if -l $fd && readlink($fd) =~ m/kvm-vcpu/;
52 $last->{$instance}->{vcpu} = $vcpu;
55 # https://www.kernel.org/doc/Documentation/filesystems/proc.txt
56 open($fh, '<', "/proc/$pid/stat");
57 my $line = <$fh>; chomp $line;
58 my $gtime = (split(/\s+/,$line))[42]; # guest time of the task in jiffies
60 if ( my $last_gtime = $last->{$instance}->{gtime} ) {
61 my $clock_ticks = POSIX::sysconf( &POSIX::_SC_CLK_TCK ); # clock ticks per second
63 my $cpu = ( ( $gtime - $last_gtime ) * 100 ) / ( $clock_ticks * $vcpu );
64 $stat->{$instance}->{cpu} = $cpu;
67 $last->{$instance}->{gtime} = $gtime;
71 foreach my $glob ( glob '/var/run/ganeti/instance-disks/*' ) {
72 my ( $instance, $disk ) = split(/:/,$glob,2);
73 $instance =~ s{^.*/}{};
75 next unless exists $stat->{$instance};
77 my $dev = readlink $glob;
80 if ( ! -e "/sys/class/block/$dev" ) {
86 open( my $fh, '<', "/sys/class/block/$dev/stat" );
87 my $v = <$fh>; chomp $v; $v =~ s/^\s+//;
88 my @s = split(/\s+/, $v );
89 # https://www.kernel.org/doc/Documentation/block/stat.txt
92 read_bytes => $s[2] * 512,
95 write_bytes => $s[6] * 512,
98 if ( my $l = $last->{$instance}->{disk}->[$disk] ) {
100 $delta->{$_} = $d->{$_} - $l->{$_} foreach keys %$d;
101 $stat->{$instance}->{disk}->[$disk] = $delta;
102 $stat->{$instance}->{disk}->[$disk]->{dev} = $dev;
103 $stat->{$instance}->{disk}->[$disk]->{disk} = $disk;
105 $last->{$instance}->{disk}->[$disk] = $d;
109 foreach my $full_instance ( glob '/var/run/ganeti/kvm-hypervisor/nic/*' ) {
110 my $instance = $full_instance;
111 $instance =~ s{^.*/}{};
112 next unless exists $stat->{$instance};
114 foreach my $nic ( glob "$full_instance/*" ) {
115 open(my $fh, '<', $nic);
118 next unless -e "/sys/class/net/$dev";
124 foreach my $f (qw( rx_bytes tx_bytes rx_packets tx_packets )) {
125 open( my $fh, '<', "/sys/class/net/$dev/statistics/$f" );
126 my $v = <$fh>; chomp $v;
129 if ( my $l = $last->{$instance}->{nic}->[$nic] ) {
130 $stat->{$instance}->{nic}->[$nic]->{$_} = $d->{$_} - $l->{$_} foreach keys %$d;
131 $stat->{$instance}->{nic}->[$nic]->{dev} = $dev;
132 if ( -e "/sys/class/net/$dev/master" ) {
133 my $vlan = readlink "/sys/class/net/$dev/master";
135 $stat->{$instance}->{nic}->[$nic]->{vlan} = $vlan;
138 $last->{$instance}->{nic}->[$nic] = $d;
146 open(my $fh, '>', '/dev/shm/gnt-monitor.influx');
151 foreach my $k ( keys %$hash ) {
153 my ( $d, $s ) = $v =~ m/^\d+$/ ? ( '', 'i' ) :
154 $v =~ m/\w+/ ? ( '"', '' ) :
155 ( '' , '' ) ; # float
157 push @v, "$k=$d$v$d$s";
159 my $i = join(',', @v);
163 foreach my $instance ( keys %$stat ) {
165 next if $skip->{$instance};
167 print $fh qq{cpu,node=$node,instance=$instance$location cpu=}, $stat->{$instance}->{cpu}, "\n";
169 foreach my $disk ( @{ $stat->{$instance}->{disk} } ) {
170 print $fh qq{disk,node=$node,instance=$instance$location },dump4influx( $disk ), "\n";
173 foreach my $nic ( @{ $stat->{$instance}->{nic} } ) {
174 my $vlan = delete $nic->{vlan};
175 print $fh qq{nic,node=$node,instance=$instance,vlan=${vlan}$location },dump4influx( $nic ), "\n";
182 system 'curl', '-XPOST', $INFLUX, '--data-binary', '@/dev/shm/gnt-monitor.influx';