/usr/sbin/sitesummary-nodes is in sitesummary 0.1.8+deb7u1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#
# 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;
use Socket;
use File::Temp qw(tempfile);
sub usage {
print <<EOF;
Usage: $0 [-hmnw]
-h Show usage information
-m Generate munin configuration for all munin clients
-n Generate nagios configuration for all nagios clients
-w List all client DNS/IP-addresses and MAC addresses
EOF
}
# Idea for way to provide overrides for the functions in this script
#eval 'require "/etc/sitesummary/sitesummary-nodes-override"';
#if ($@ && $@ !~ qr{^Can't locate /etc/sitesummary/sitesummary-nodes-override}) {
# die $@;
#};
my %opts;
getopts("hmnw", \%opts) || (usage(), exit(1));
my $nagiosignorefile = "/etc/sitesummary/nagiosignore";
my %nagios_ignore;
my %hostnames;
my $server_hostid = get_localhost_hostid() ||
die "Unable to figure out hostid for the local host";
for_all_hosts(\&handle_host);
if ($opts{'h'}) {
usage();
exit 0;
} elsif ($opts{'m'}) {
print_munin_list();
} elsif ($opts{'w'}) {
print_ip_hw_list();
} elsif ($opts{'n'}) {
if (open(my $fh, $nagiosignorefile)) {
while (<$fh>) {
chomp;
my ($hostname, $nagioscheck) = split(/ /, $_, 2);
$nagios_ignore{"$hostname $nagioscheck"} = 1;
}
close $fh;
}
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 get_localhost_hostid {
my ($fh, $filename) = tempfile();
`/sbin/ifconfig -a > $filename`;
my $localhost_hostid = get_unique_ether_id($filename);
unlink $filename;
return $localhost_hostid;
}
# Get an IP address, try to resolve it in DNS , and return the IP
# address if no DNS reverse entry was found.
sub get_dnsnameorip {
my $ipaddr = shift;
my $resolved;
$resolved = gethostbyaddr(inet_aton($ipaddr), AF_INET);
return $resolved || $ipaddr;
}
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") &&
$server_hostid ne $hostid;
}
# Return information about the switches connected to a given host, as
# reported by cdpr (and perhaps lldp in the future?)
sub get_switch_info {
my $hostid = shift;
my %switch = ();
for my $if (qw(eth0 eth1)) {
my $path = get_filepath_current($hostid, "/system/cdpr.$if");
my ($id, $addr);
if (open(my $fh, $path)) {
while (<$fh>) {
chomp;
if (m/^Device ID$/) {
$id = <$fh>;
chomp $id;
$id =~ s/^\s+value:\s+(\S)\s*/$1/;
}
if (m/^Addresses$/) {
$addr = <$fh>;
chomp $addr;
$addr =~ s/^\s+value:\s+(\S)\s*/$1/;
$switch{$addr} = $id;
}
}
close($fh);
}
}
return %switch ? %switch : ();
}
sub is_remote_nrpe_config_active {
my $hostid = shift;
my $path = get_filepath_current($hostid, "/nagios/sitesummary-nrpe.cfg");
if (open(my $fh, $path)) {
while (<$fh>) {
if (m/^dont_blame_nrpe=1$/) {
close($fh);
return "args";
}
}
close($fh);
return "noargs";
}
return undef;
}
sub print_nagios_service_check {
my ($remote, $hostname, $description, $check, $check_args) = @_;
my $template = "server-service";
return if exists $nagios_ignore{"$hostname $description"};
my $cmd;
if ($remote) {
$cmd = "check_nrpe!$check";
if (defined $check_args) {
$check_args =~ s/!/ /g;
$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 nagios_hostgroup_namewash {
my $name = shift;
$name =~ s/[^0-9a-zA-Z_-]+/-/g; # Avoid illegal characteres
return $name;
}
sub print_nagios_hostgroup {
my ($name, $alias) = @_;
print <<EOF;
define hostgroup {
hostgroup_name $name
EOF
print " alias $alias\n" if $alias;
print "}\n";
}
sub print_nagios_host_check {
my ($template, $hostname, $address, $parent, @hostgroups) = @_;
$template = $template || "server-host";
print <<EOF;
##################### $hostname #######################
define host {
use $template
host_name $hostname
address $address
EOF
print " parents $parent\n" if ($parent);
if (@hostgroups) {
print " hostgroups " . join(",", @hostgroups), "\n";
}
print "}\n";
}
sub generate_nagios_config {
my %hosts;
my %hostgroup;
for my $hostname (sort keys %hostnames) {
my @groups = ();
my $hostid = $hostnames{$hostname};
my $address = get_dns_address($hostid);
my $localhostname = get_localhostname($hostid);
unless (defined $address && defined $localhostname) {
print "# Skipping ID $hostid without hostname and address\n";
next;
}
my $redirect = "";
my $nagiosclient = is_nagios_client($hostid);
my $remote = is_remote_nagios_client($hostid);
my $nrpestatus = is_remote_nrpe_config_active($hostid);
# Only check laptops that have the nagios tools installed
if (is_laptop($hostid) && ! $remote && ! $nagiosclient) {
print "# Skipping laptop $hostname\n";
next;
}
# Only check hosts missing in DNS if they have the nagios
# tools installed.
if ($hostname =~ m/^[\d\.:]+$/ && ! $remote && ! $nagiosclient) {
print "# Skipping host $hostname missing in DNS\n";
next;
}
my $site = get_site($hostid) || "none";
my $sitegroup = get_sitegroup($hostid);
my $debversion = get_debian_ver($hostid);
my $eduprofile = get_debian_edu_profile($hostid);
my $eduversion = get_debian_edu_ver($hostid);
push(@groups, nagios_hostgroup_namewash("site-$site"));
if ($sitegroup) {
push(@groups, nagios_hostgroup_namewash("site-$site-$sitegroup"));
}
push(@groups, nagios_hostgroup_namewash("debian-version-$debversion"))
if defined $debversion;
if ($eduprofile) {
$eduprofile =~ s/^"|"$//g; # Remove "" around the values
for my $profile (split(/,\s*/, $eduprofile)) {
push(@groups,
nagios_hostgroup_namewash("edu-profile-$profile"));
}
}
if ($eduversion) {
$eduversion =~ s/^"|"$//g; # Remove "" around the values
push(@groups, nagios_hostgroup_namewash("edu-version-$eduversion"));
}
my $hostclass = get_hostclass($hostid) || "none";
push(@groups, nagios_hostgroup_namewash("hostclass-$hostclass"));
for my $group ( @groups ) {
$hostgroup{$group} = 1;
}
my $defaultrouteip = get_default_route($hostid);
my $defaultroute;
$defaultroute = get_dnsnameorip($defaultrouteip)
if defined $defaultroute;
# Also check default route host
if (defined $defaultroute && !exists $hosts{$defaultroute}) {
print_nagios_host_check(undef, $defaultroute, $defaultroute,
undef, "router");
$hosts{$defaultroute} = $defaultroute;
$hostgroup{"router"} = 1;
print_nagios_service_check(0, $defaultroute, "ping",
"check_ping", "100.0,20%!500.0,60%");
}
my %switch = get_switch_info($hostid);
my @parents = ();
for my $addr (keys %switch) {
$hostgroup{"switch"} = 1;
print_nagios_host_check("switch-host", $switch{$addr}, $addr,
undef, "switch")
unless (exists $hosts{$switch{$addr}});
$hosts{$switch{$addr}} = $addr;
push(@parents, $switch{$addr}) if $remote;
}
print_nagios_host_check(undef, $hostname, $address,
join(",", @parents), @groups)
unless (exists $hosts{$hostname});
$hosts{$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' },
4949 => { name => 'munin', package => 'munin-node' },
);
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);
}
# Check SSH server
print_nagios_service_check(0, $hostname, "ssh",
"check_ssh")
if is_pkg_installed($hostid, "openssh-server");
print_nagios_service_check(0, $hostname, "http",
"check_http")
if (is_pkg_installed($hostid, "apache") ||
is_pkg_installed($hostid, "apache2"));
# Check XFS port only if we can see that it is listening on TCP
if (is_pkg_installed($hostid, "xfs")) {
my $path = get_filepath_current($hostid, "/system/x11-fs-config");
if ( -e $path ) {
my $tcp = 1;
open (my $fh, "<", $path) || die "unable to read from $path";
while (<$fh>) {
chomp;
s/\#.+$//;
$tcp = 0 if m/^no-listen\s*=\s*tcp\s*$/;
}
close($fh);
print_nagios_service_check(0, $hostname, "xfs",
"check_tcp", 7100)
if ($tcp);
}
}
print_nagios_service_check(0, $hostname, "cups queue",
"check_cups_queue")
if (is_pkg_installed($hostid, "cups") &&
is_pkg_installed($hostid, "cups-client"));
# The rest of the checks only work if NRPE is installed and configured
next unless ((!$remote && $nagiosclient)
|| ($remote && defined $nrpestatus));
# These work without any argument passing.
# Check for APT upgrades
print_nagios_service_check($remote, $hostname, "apt-updates",
"check_apt");
# Check if a kernel reboot is needed
print_nagios_service_check($remote, $hostname, "kernel status",
"check_kernel_status");
# Detect bad DNS servers
print_nagios_service_check($remote, $hostname, "/etc/resolv.conf",
"check_etc_resolv");
# Detect hosts entries not matching DNS entries
print_nagios_service_check($remote, $hostname, "/etc/hosts",
"check_etc_hosts");
# Detect a shutdown in progress
print_nagios_service_check($remote, $hostname, "shutdown status",
"check_shutdown");
# The check_dhcp test do not seem to work. Check for the process existence.
# print_nagios_service_check($remote, $hostname, "dhcp",
# "check_dhcp")
# if is_pkg_installed($hostid, "dhcp3-server");
print_nagios_service_check($remote, $hostname, "process - dhcpd3",
"check_procs_dhcpd3", "1:15!1:25")
if (is_pkg_installed($hostid, "dhcp3-server"));
print_nagios_service_check($remote, $hostname, "process - dhcpd",
"check_procs_dhcpd", "1:15!1:25")
if (is_pkg_installed($hostid, "isc-dhcp-server"));
# Check DNS server
print_nagios_service_check($remote, $hostname, "dns",
"check_dns", $localhostname)
if (is_pkg_installed($hostid, "pdns-server") ||
is_pkg_installed($hostid, "bind9"));
# Check FTP server
print_nagios_service_check($remote, $hostname, "ftp",
"check_ftp")
if is_pkg_installed($hostid, "proftpd");
# Check IMAPS server
print_nagios_service_check($remote, $hostname, "imaps",
"check_imaps")
if is_pkg_installed($hostid, "courier-imap-ssl");
# check software raid status if any is active
if ( -e get_filepath_current($hostid, "/system/mdstat")) {
my $fh;
if (open($fh, get_filepath_current($hostid, "/system/mdstat")) &&
grep(/^md\d+ :/, <$fh>)) {
print_nagios_service_check($remote, $hostname, "sw-raid",
"check_linux_raid");
}
close($fh);
}
# Check NFS server
print_nagios_service_check($remote, $hostname, "nfs",
"check_nfs")
if is_pkg_installed($hostid, "nfs-kernel-server");
print_nagios_service_check($remote, $hostname, "smtp",
"check_smtp")
if (is_pkg_installed($hostid, "exim4-daemon-heavy") ||
is_pkg_installed($hostid, "exim4-daemon-light"));
# These need argument passing (as in dont_blame_nrpe=1)
next unless ((!$remote && $nagiosclient)
|| ($remote && "args" eq $nrpestatus));
print_nagios_service_check($remote, $hostname, "swap",
"check_swap", "10%!5%");
my $proclimit = "500!1000";
# Raise process count limits for thin clients, as
# lots of users can log into these machines and run their
# desktops from there.
if (is_pkg_installed($hostid, "ltsp-server")) {
$proclimit = "1500!2500";
}
print_nagios_service_check($remote, $hostname, "processes total",
"check_procs", $proclimit);
print_nagios_service_check($remote, $hostname, "processes zombie",
"check_procs_zombie", "20!100");
# Check unix load
print_nagios_service_check($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});
# Avoid system file systems and non-local file systems.
next if ($fs eq "devpts" ||
$fs eq "anon_inodefs" ||
$fs eq "autofs" ||
$fs eq "bdev" ||
$fs eq "binfmt_misc" ||
$fs eq "cgroup" ||
$fs eq "cifs" ||
$fs eq "cpuset" ||
$fs eq "debugfs" ||
$fs eq "fuse.ltspfs" ||
$fs eq "fusectl" ||
$fs eq "hugetlbfs" ||
$fs eq "inotifyfs" ||
$fs eq "iso9660" ||
$fs eq "mqueue" ||
$fs eq "nfs" ||
$fs eq "nfs4" ||
$fs eq "nfsd" ||
$fs eq "oprofilefs" ||
$fs eq "pipefs" ||
$fs eq "proc" ||
$fs eq "ramfs" ||
$fs eq "rootfs" ||
$fs eq "rpc_pipefs" ||
$fs eq "securityfs" ||
$fs eq "smb" ||
$fs eq "sockfs" ||
$fs eq "sysfs" ||
$fs eq "tmpfs" ||
$fs eq "devtmpfs" ||
$fs eq "xenfs" ||
$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 munin if munin-node is installed
# check hw raid status
# check hardware status
# check LDAP and LDAPS using the protocol, module present in
# nagios-plugins-basic
print_nagios_service_check(0, $hostname, "ldap root DSE",
"check_ldap_root")
if is_pkg_installed($hostid, "slapd");
# Check Squid web proxy
print_nagios_service_check($remote, $hostname, "squid",
"check_squid", "3128!http://www")
if is_pkg_installed($hostid, "squid");
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, $hostname, "process - cron",
"check_procs_cron", "1:15!1:25")
if (is_pkg_installed($hostid, "cron"));
}
if (%hostgroup) {
print <<EOF;
##################### host groups #######################
EOF
for my $name (sort keys %hostgroup) {
print_nagios_hostgroup($name);
}
}
}
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