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|
#!/usr/bin/perl
#
# Generate list of nodes to load from /etc/munin/munin.conf to check
# all the machines reporting to sitesummary.
use strict;
use warnings;
use SiteSummary;
use Getopt::Std;
sub usage {
print <<EOF;
Usage: $0 [-hmnw]
-h Show usage information
-m Generate munin configuration for all munin clients
-n Generate nagios configuration for all nagios clients
-r Do not generate nagios checks requiring nrpe configuration on remote hosts
-w List all client DNS/IP-addresses and MAC addresses
EOF
}
my %opts;
getopts("hmnwr", \%opts) || (usage(), exit(1));
my %hostnames;
for_all_hosts(\&handle_host);
if ($opts{'h'}) {
usage();
exit 0;
} elsif ($opts{'m'}) {
print_munin_list();
} elsif ($opts{'w'}) {
print_ip_hw_list();
} elsif ($opts{'n'}) {
generate_nagios_config();
} else {
print_list();
}
exit 0;
sub handle_host {
my $hostid = shift;
my $address = get_dns_address($hostid);
$hostnames{$address} = $hostid;
}
sub print_list {
for my $hostname (sort keys %hostnames) {
print "$hostname\n";
}
}
sub is_pkg_installed {
my ($hostid, $pkgname) = @_;
# Check debian/dpkg-l for 'ii *pkgname '
my $path = get_filepath_current($hostid, "/debian/dpkg-l");
if (open (my $fh, $path)) {
while(<$fh>) {
if (m/^ii *$pkgname /) {
close($fh);
return 1
}
}
close($fh);
}
return undef;
}
sub is_munin_client {
my $hostid = shift;
return is_pkg_installed($hostid, "munin-node");
}
sub is_nagios_client {
my $hostid = shift;
return is_pkg_installed($hostid, "nagios-nrpe-server") ||
is_pkg_installed($hostid, "nagios-text") ||
is_pkg_installed($hostid, "nagios2") ||
is_pkg_installed($hostid, "nagios3");
}
sub print_munin_list {
for my $hostname (sort keys %hostnames) {
next unless (is_munin_client($hostnames{$hostname}));
# Using hostname as address, to avoid hardcoding IP addresses in
# the file. Might be an idea to fetch the IP address from
# system/ifconfig-a
print <<EOF;
[$hostname]
address $hostname
use_node_name yes
EOF
}
}
sub print_ip_hw_list {
for my $hostname (sort keys %hostnames) {
my $macaddress = get_primary_macaddress($hostnames{$hostname});
print "$hostname $macaddress\n";
}
}
sub is_remote_nagios_client {
my $hostid = shift;
return is_pkg_installed($hostid, "nagios-nrpe-server") && !
(is_pkg_installed($hostid, "nagios-text") ||
is_pkg_installed($hostid, "nagios2") ||
is_pkg_installed($hostid, "nagios3"));
}
sub print_nagios_service_check {
my ($remote, $hostname, $description, $check, $check_args) = @_;
my $template = "server-service";
my $cmd;
return if $opts{'r'} && $remote;
if ($remote) {
$cmd = "check_nrpe!$check";
if (defined $check_args) {
$check_args =~ s/!/ /;
$cmd .= " -a $check_args";
}
} else {
$cmd = "$check";
$cmd .= "!$check_args" if defined $check_args;
}
print <<EOF;
define service {
use $template;
host_name $hostname
service_description $description
check_command $cmd
}
EOF
}
sub print_nagios_host_check {
my ($hostname, $address) = @_;
my $template = "server-host";
print <<EOF;
define host {
use $template
host_name $hostname
address $address
}
EOF
}
sub generate_nagios_config {
for my $hostname (sort keys %hostnames) {
my $hostid = $hostnames{$hostname};
my $address = get_dns_address($hostid);
my $redirect = "";
my $remote = is_remote_nagios_client($hostid);
print <<EOF;
##################### $hostname #######################
EOF
print_nagios_host_check($hostname, $address);
# first, check ping to see if the other checks should be performed
print_nagios_service_check(0, $hostname, "ping",
"check_ping", "100.0,20%!500.0,60%");
my %tcpservices =
(
139 => { name => 'samba', package => 'samba' },
389 => { name => 'ldap', package => 'slapd' },
631 => { name => 'CUPS', package => 'cupsys' },
4949 => { name => 'munin', package => 'munin-node' },
7100 => { name => 'xfs', package => 'xfs' }, # check X font server
);
for my $port (sort { $a <=> $b } keys %tcpservices) {
next if (exists $tcpservices{$port}->{package} && !
is_pkg_installed($hostid,
$tcpservices{$port}->{package}));
my $servicename = $tcpservices{$port}->{name};
print_nagios_service_check(0, $hostname, $servicename,
"check_tcp", $port);
}
# The rest of the checks only work if NRPE is installed and configured
next unless (is_nagios_client($hostid));
print_nagios_service_check($remote, $hostname, "swap",
"check_swap", "10%!5%");
print_nagios_service_check($remote, $hostname, "current users",
"check_users", "20!50");
print_nagios_service_check($remote, $hostname, "processes total",
"check_procs", "500!1000");
print_nagios_service_check($remote, $hostname, "processes zombie",
"check_procs_zombie", "20!100");
print_nagios_service_check($remote, $hostname, "apt-updates",
"check_apt");
# Check unix load
print_nagios_service_check($remote, $hostname, "load as in top",
"check_load", "75,75,75!90,90,90");
# check disk free space
my $path = get_filepath_current($hostid, "/system/procmounts");
if ( -e $path ) {
open (F, "<", $path) || die "unable to read from $path";
my %checked;
while (<F>) {
chomp;
my ($device, $partition, $fs, $opts) = split;
next if (exists $checked{$device});
next if ($fs eq "devpts" ||
$fs eq "autofs" ||
$fs eq "binfmt_misc" ||
$fs eq "fusectl" ||
$fs eq "iso9660" ||
$fs eq "nfs" ||
$fs eq "nfsd" ||
$fs eq "proc" ||
$fs eq "rootfs" ||
$fs eq "rpc_pipefs" ||
$fs eq "sysfs" ||
$fs eq "tmpfs" ||
$fs eq "usbfs");
$checked{$device} = 1;
my $warn = 10;
my $crit = 5;
print_nagios_service_check($remote, $hostname,
"disk $partition",
"check_disk",
"$warn%!$crit%!$partition");
}
}
# check software raid status
if ( -e get_filepath_current($hostid, "/system/mdstat") ) {
print_nagios_service_check($remote, $hostname, "sw-raid",
"check_linux_raid");
}
# check munin if munin-node is installed
# check hw raid status
# check hardware status
# check LDAP and LDAPS using the protocol
# Check DNS server
print_nagios_service_check($remote, $hostname, "dns",
"check_dns")
if is_pkg_installed($hostid, "pdns-server");
# Check IMAPS server
print_nagios_service_check($remote, $hostname, "imaps",
"check_imaps")
if is_pkg_installed($hostid, "courier-imap-ssl");
# Check NFS server
print_nagios_service_check($remote, $hostname, "nfs",
"check_nfs")
if is_pkg_installed($hostid, "nfs-kernel-server");
# Check Squid web proxy
print_nagios_service_check($remote, $hostname, "squid",
"check_squid", "3128!http://www")
if is_pkg_installed($hostid, "squid");
# Check SSH server
print_nagios_service_check($remote, $hostname, "ssh",
"check_ssh")
if is_pkg_installed($hostid, "openssh-server");
print_nagios_service_check($remote, $hostname, "http",
"check_http")
if (is_pkg_installed($hostid, "apache") ||
is_pkg_installed($hostid, "apache2"));
print_nagios_service_check($remote, $hostname, "ntp time server",
"check_ntp", "-H!localhost")
if (is_pkg_installed($hostid, "ntp") ||
is_pkg_installed($hostid, "ntp-server"));
# Detect if cron no longer is running
print_nagios_service_check($remote, $hostname, "process - cron",
"check_procs_command", "1:15!1:25!cron")
if (is_pkg_installed($hostid, "cron"));
print_nagios_service_check($remote, $hostname, "dhcp",
"check_dhcp")
if is_pkg_installed($hostid, "dhcp3-server");
}
}
|
