/usr/share/perl5/MMM/Monitor/Agent.pm is in mysql-mmm-monitor 2.2.1-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 | package MMM::Monitor::Agent;
use strict;
use warnings FATAL => 'all';
use Log::Log4perl qw(:easy);
use MMM::Common::Socket;
use MMM::Monitor::ChecksStatus;
our $VERSION = '0.01';
use Class::Struct;
no warnings qw(Class::Struct);
struct 'MMM::Monitor::Agent' => {
host => '$',
mode => '$',
ip => '$',
port => '$',
state => '$',
roles => '@',
uptime => '$',
last_uptime => '$',
last_state_change => '$',
online_since => '$',
flapping => '$',
flapstart => '$',
flapcount => '$',
agent_down => '$'
};
sub state {
my $self = shift;
if (@_) {
my $new_state = shift;
my $old_state = $self->{'MMM::Monitor::Agent::state'};
$self->last_state_change(time()) if ($old_state ne $new_state);
$self->online_since(time()) if ($old_state ne $new_state && $new_state eq 'ONLINE');
if ($old_state ne $new_state && $main::config->{monitor}->{flap_count}) {
if ($old_state eq 'ONLINE' and $new_state ne 'ADMIN_OFFLINE') {
if (!$self->flapstart || $self->flapstart < time() - $main::config->{monitor}->{flap_duration}) {
$self->flapstart(time());
$self->flapcount(1);
}
else {
$self->{'MMM::Monitor::Agent::flapcount'}++;
if ($self->flapcount > $main::config->{monitor}->{flap_count}) {
$self->flapping(1);
$self->flapstart(0);
FATAL sprintf('Host %s is flapping!', $self->host);
}
}
}
}
$self->{'MMM::Monitor::Agent::state'} = $new_state;
warn 'Too many args to state' if @_;
}
return $self->{'MMM::Monitor::Agent::state'};
}
sub _send_command {
my $self = shift;
my $cmd = shift;
my @params = @_;
my $checks_status = MMM::Monitor::ChecksStatus->instance();
unless ($checks_status->ping($self->host)) {
return 0;
}
DEBUG sprintf("Sending command '%s(%s)' to %s (%s:%s)", $cmd, join(', ', @params), $self->host, $self->ip, $self->port);
my $socket;
CONNECT: {
$socket = MMM::Common::Socket::create_sender($self->ip, $self->port, 10);
unless ($socket && $socket->connected) {
redo CONNECT if ($!{EINTR});
return 0;
}
}
print $socket join('|', $cmd, main::MMM_PROTOCOL_VERSION, $self->host, @params), "\n";
my $res;
READ: {
$res = <$socket>;
redo READ if !$res && $!{EINTR};
}
close($socket);
unless (defined($res)) {
WARN sprintf('Received undefined answer from host %s. $!: %s', $self->host, $!);
return 0;
}
DEBUG "Received Answer: $res";
if ($res =~ /(.*)\|UP:(.*)/) {
$res = $1;
my $uptime = $2;
$self->uptime($uptime);
$self->last_uptime($uptime) if ($self->state eq 'ONLINE');
}
else {
WARN sprintf('Received bad answer \'%s\' from host %s. $!: %s', $res, $self->host, $!);
}
return $res;
}
sub _send_command_retry {
my $self = shift;
my $retries = shift;
my $cmd = shift;
my @params = @_;
my $res;
do {
$res = $self->_send_command($cmd, @params);
if ($res) { return $res; }
$retries--;
if ($retries >= 0) { DEBUG "Retrying to send command"; }
} while ($retries >= 0);
return $res;
}
sub cmd_ping($) {
my $self = shift;
my $retries = shift || 0;
return $self->_send_command_retry($retries, 'PING');
}
sub cmd_set_status($$) {
my $self = shift;
my $master = shift;
my $retries = shift || 0;
return $self->_send_command_retry($retries, 'SET_STATUS', $self->state, join(',', sort(@{$self->roles})), $master);
}
sub cmd_get_agent_status($) {
my $self = shift;
my $retries = shift || 0;
return $self->_send_command_retry($retries, 'GET_AGENT_STATUS');
}
sub cmd_get_system_status($) {
my $self = shift;
my $retries = shift || 0;
return $self->_send_command_retry($retries, 'GET_SYSTEM_STATUS');
}
sub cmd_clear_bad_roles($) {
my $self = shift;
my $retries = shift || 0;
return $self->_send_command_retry($retries, 'CLEAR_BAD_ROLES');
}
1;
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