mirror of
https://github.com/pragma-/pbot.git
synced 2024-12-27 13:12:42 +01:00
50 lines
1.2 KiB
Perl
Executable File
50 lines
1.2 KiB
Perl
Executable File
#!/usr/bin/env perl
|
|
|
|
# File: vm-watchdog
|
|
#
|
|
# Purpose: Monitors pbot-vm cpu usage. Resets vm to snapshot if cpu exceeds
|
|
# threshold limits.
|
|
|
|
# SPDX-FileCopyrightText: 2021 Pragmatic Software <pragma78@gmail.com>
|
|
# SPDX-License-Identifier: MIT
|
|
|
|
use warnings;
|
|
use strict;
|
|
|
|
use Proc::ProcessTable;
|
|
use IO::Socket;
|
|
|
|
my $SLEEP = 15;
|
|
my $MAX_PCTCPU = 25;
|
|
my $QEMU = 'qemu-system-x86';
|
|
my $DOMAIN = 'pbot-vm';
|
|
|
|
my $last_pctcpu = 0;
|
|
|
|
sub reset_vm {
|
|
print "Resetting vm\n";
|
|
system("virsh snapshot-revert $DOMAIN 1");
|
|
print "Reset vm\n";
|
|
}
|
|
|
|
while (1) {
|
|
my $t = Proc::ProcessTable->new(enable_ttys => 0);
|
|
|
|
foreach my $p (@{$t->table}) {
|
|
if ($p->fname eq $QEMU and $p->cmndline =~ m/guest=\Q$DOMAIN\E/) {
|
|
# $p->pctcpu never updates? so we use top instead.
|
|
my $pctcpu = `top -b -n 1 -p $p->{pid} | tail -n 1 | awk '{print \$9}'`;
|
|
$pctcpu =~ s/^\s+|\s+$//g;
|
|
print scalar localtime, " :: Got $DOMAIN qemu pid: $p; using $pctcpu cpu\n" if $pctcpu > 0;
|
|
|
|
if ($pctcpu >= $last_pctcpu and $last_pctcpu >= $MAX_PCTCPU) {
|
|
reset_vm;
|
|
$last_pctcpu = 0;
|
|
} else {
|
|
$last_pctcpu = $pctcpu;
|
|
}
|
|
}
|
|
}
|
|
sleep $SLEEP;
|
|
}
|