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|
#!/usr/bin/perl
#
# Module: vyatta-keepalived.pl
#
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2007 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Stig Thormodsrud
# Date: October 2007
# Description: Script to glue vyatta cli to keepalived daemon
#
# **** End License ****
#
use lib "/opt/vyatta/share/perl5/";
use VyattaConfig;
use VyattaKeepalived;
use Getopt::Long;
use strict;
use warnings;
my %HoA_sync_groups;
sub keepalived_get_values {
my ($intf, $path) = @_;
my $output = '';
my $config = new VyattaConfig;
my $state_transition_script = VyattaKeepalived::get_state_script();
$config->setLevel("$path vrrp vrrp-group");
my @groups = $config->listNodes();
foreach my $group (@groups) {
my $vrrp_instance = "vyatta-$intf-$group";
$config->setLevel("$path vrrp vrrp-group $group");
my @vips = $config->returnValues("virtual-address");
my $num_vips = scalar(@vips);
if ($num_vips == 0) {
print "must define a virtual-address for vrrp-group $group\n";
exit 1;
}
if ($num_vips > 20) {
print "can not set more than 20 VIPs per group\n";
exit 1;
}
my $priority = $config->returnValue("priority");
if (!defined $priority) {
$priority = 1;
}
my $preempt = $config->returnValue("preempt");
if (!defined $preempt) {
$preempt = "true";
}
my $advert_int = $config->returnValue("advertise-interval");
if (!defined $advert_int) {
$advert_int = 1;
}
my $sync_group = $config->returnValue("sync-group");
if (defined $sync_group && $sync_group ne "") {
push @{ $HoA_sync_groups{$sync_group} }, $vrrp_instance;
}
$config->setLevel("$path vrrp vrrp-group $group authentication");
my $auth_type = $config->returnValue("type");
my $auth_pass;
if (defined $auth_type) {
$auth_type = "PASS" if $auth_type eq "simple";
$auth_type = uc($auth_type);
$auth_pass = $config->returnValue("password");
if (! defined $auth_pass) {
print "vrrp authentication password not set";
exit 1;
}
}
$output .= "vrrp_instance $vrrp_instance \{\n";
if ($preempt eq "false") {
$output .= "\tstate BACKUP\n";
} else {
$output .= "\tstate MASTER\n";
}
$output .= "\tinterface $intf\n";
$output .= "\tvirtual_router_id $group\n";
$output .= "\tpriority $priority\n";
if ($preempt eq "false") {
$output .= "\tnopreempt\n";
}
$output .= "\tadvert_int $advert_int\n";
if (defined $auth_type) {
$output .= "\tauthentication {\n";
$output .= "\t\tauth_type $auth_type\n";
$output .= "\t\tauth_pass $auth_pass\n\t}\n";
}
$output .= "\tvirtual_ipaddress \{\n";
foreach my $vip (@vips) {
$output .= "\t\t$vip\n";
}
$output .= "\t\}\n";
$output .= "\tnotify_master ";
$output .= "\"$state_transition_script master $intf $group @vips\" \n";
$output .= "\tnotify_backup ";
$output .= "\"$state_transition_script backup $intf $group @vips\" \n";
$output .= "\tnotify_fault ";
$output .= "\"$state_transition_script fault $intf $group @vips\" \n";
$output .= "\}\n";
}
return $output;
}
sub vrrp_get_sync_groups {
my $output = "";
foreach my $sync_group ( keys %HoA_sync_groups) {
$output .= "vrrp_sync_group $sync_group \{\n\tgroup \{\n";
foreach my $vrrp_instance ( 0 .. $#{ $HoA_sync_groups{$sync_group} } ) {
$output .= "\t\t$HoA_sync_groups{$sync_group}[$vrrp_instance]\n";
}
$output .= "\t\}\n\}\n";
}
return $output;
}
sub vrrp_update_config {
my $output;
my $config = new VyattaConfig;
$config->setLevel("interfaces ethernet");
my @eths = $config->listNodes();
my $vrrp_instances = 0;
foreach my $eth (@eths) {
my $path = "interfaces ethernet $eth";
$config->setLevel($path);
if ($config->exists("vrrp")) {
$output .= keepalived_get_values($eth, $path);
$vrrp_instances++;
}
if ($config->exists("vif")) {
my $path = "interfaces ethernet $eth vif";
$config->setLevel($path);
my @vifs = $config->listNodes();
foreach my $vif (@vifs) {
#
# keepalived gets real grumpy with interfaces that don't
# exist, so skip vlans that haven't been instantiated
# yet (typically occurs at boot up).
#
my $vif_intf = $eth . "." . $vif;
if (!(-d "/sys/class/net/$vif_intf")) {
VyattaKeepalived::vrrp_log("skipping $vif_intf");
next;
}
my $vif_path = "$path $vif";
$config->setLevel($vif_path);
if ($config->exists("vrrp")) {
$output .= keepalived_get_values($vif_intf, $vif_path);
$vrrp_instances++;
}
}
}
}
if ($vrrp_instances > 0) {
my $sync_groups = vrrp_get_sync_groups();
if (defined $sync_groups && $sync_groups ne "") {
$output = $sync_groups . $output;
}
my $conf_file = VyattaKeepalived::get_conf_file();
keepalived_write_file($conf_file, $output);
VyattaKeepalived::restart_daemon($conf_file);
}
return $vrrp_instances;
}
sub keepalived_write_file {
my ($file, $data) = @_;
open(my $fh, '>', $file) || die "Couldn't open $file - $!";
print $fh $data;
close $fh;
}
#
# main
#
my ($action, $vrrp_intf, $vrrp_group);
GetOptions("vrrp-action=s" => \$action,
"intf=s" => \$vrrp_intf,
"group=s" => \$vrrp_group);
if (! defined $action) {
print "no action\n";
exit 1;
}
if ($action eq "update") {
my $vrrp_instances = vrrp_update_config();
VyattaKeepalived::vrrp_log("vrrp update $vrrp_intf $vrrp_instances");
if ($vrrp_instances == 0) {
VyattaKeepalived::stop_daemon();
}
}
if ($action eq "delete") {
if (! defined $vrrp_intf || ! defined $vrrp_group) {
print "must include interface & group";
exit 1;
}
my $state_file = VyattaKeepalived::get_state_file($vrrp_intf, $vrrp_group);
system("rm -f $state_file");
VyattaKeepalived::vrrp_log("vrrp delete $vrrp_intf $vrrp_group");
exit 0;
}
exit 0;
# end of file
|
