package xCAT_plugin::ddns;
use strict;
use Getopt::Long;
use Net::DNS;
use File::Path;
use xCAT::Table;
use Sys::Hostname;
use xCAT::TableUtils;
use xCAT::NetworkUtils qw/getipaddr/;
use xCAT::Utils;
use Math::BigInt;
use MIME::Base64;
use xCAT::SvrUtils;
use Socket;
use Fcntl qw/:flock/;
use Data::Dumper;
# This is a rewrite of DNS management using nsupdate rather than
# direct zone mangling
my $callback;
my $distro = xCAT::Utils->osver();
my $service = "named";
# is this ubuntu ?
if ($distro =~ /ubuntu.*/i || $distro =~ /debian.*/i) {
$service = "bind9";
}
sub handled_commands
{
my @entries = xCAT::TableUtils->get_site_attribute("dnshandler");
my $site_entry = $entries[0];
unless (defined($site_entry)) {
return { "makedns" => "ddns" };
}
return { "makedns" => "site:dnshandler" };
}
sub getzonesfornet {
my $netent = shift;
my $net = $netent->{net};
my $mask = $netent->{mask};
my @zones = ();
if ($netent->{ddnsdomain}) {
push @zones, $netent->{ddnsdomain};
}
if ($net =~ /:/) { #ipv6, for now do the simple stuff under the assumption we won't have a mask indivisible by 4
$net =~ s/\/(.*)//;
my $maskbits = $1;
if ($maskbits % 4) {
die "Not supporting having a mask like $mask on an ipv6 network like $net";
}
my $netnum = getipaddr($net, GetNumber => 1);
unless ($netnum) { return (); }
$netnum->brsft(128 - $maskbits);
my $prefix = $netnum->as_hex();
my $nibbs = $maskbits / 4;
$prefix =~ s/^0x//;
my $rev;
foreach (reverse(split //, $prefix)) {
$rev .= $_ . ".";
$nibbs--;
}
while ($nibbs) {
$rev .= "0.";
$nibbs--;
}
$rev .= "ip6.arpa.";
push @zones, $rev;
return @zones;
}
#return all in-addr reverse zones for a given mask and net
#for class a,b,c, the answer is easy
#for classless, identify the partial byte, do $netbyte | (0xff&~$maskbyte) to get the highest value
#return sequence from $net to value calculated above
#since old bind.pm only went as far as class c, we will carry that over for now (more people with smaller than class c complained
#and none hit the theoretical conflict. FYI, the 'official' method in RFC 2317 seems cumbersome, but maybe one day it makes sense
#since this is dhcpv4 for now, we'll use the inet_aton, ntop functions to generate the answers (dhcpv6 omapi would be nice...)
my $netn = inet_aton($net);
my $maskn = inet_aton($mask);
unless ($netn and $mask) { return (); }
my $netnum = unpack('N', $netn);
my $masknum = unpack('N', $maskn);
if ($masknum >= 0xffffff00) { #treat all netmasks higher than 255.255.255.0 as class C
$netnum = $netnum & 0xffffff00;
$netn = pack('N', $netnum);
$net = inet_ntoa($netn);
$net =~ s/\.[^\.]*$//;
return (join('.', reverse(split('\.', $net))) . '.IN-ADDR.ARPA.');
} elsif ($masknum > 0xffff0000) { #(/17) to /23
my $tempnumber = ($netnum >> 8);
$masknum = $masknum >> 8;
my $highnet = $tempnumber | (0xffffff & ~$masknum);
foreach ($tempnumber .. $highnet) {
$netnum = $_ << 8;
$net = inet_ntoa(pack('N', $netnum));
$net =~ s/\.[^\.]*$//;
push @zones, join('.', reverse(split('\.', $net))) . '.IN-ADDR.ARPA.';
}
return @zones;
} elsif ($masknum > 0xff000000) { # (/9) to class b /16, could have made it more flexible, for for only two cases, not worth in
my $tempnumber = ($netnum >> 16); #the last two bytes are insignificant, shift them off to make math easier
$masknum = $masknum >> 16;
my $highnet = $tempnumber | (0xffff & ~$masknum);
foreach ($tempnumber .. $highnet) {
$netnum = $_ << 16; #convert back to the real network value
$net = inet_ntoa(pack('N', $netnum));
$net =~ s/\.[^\.]*$//;
$net =~ s/\.[^\.]*$//;
push @zones, join('.', reverse(split('\.', $net))) . '.IN-ADDR.ARPA.';
}
return @zones;
} else { #class a (theoretically larger, but those shouldn't exist)
my $tempnumber = ($netnum >> 24); #the last two bytes are insignificant, shift them off to make math easier
$masknum = $masknum >> 24;
my $highnet = $tempnumber | (0xff & ~$masknum);
foreach ($tempnumber .. $highnet) {
$netnum = $_ << 24; #convert back to the real network value
$net = inet_ntoa(pack('N', $netnum));
$net =~ s/\.[^\.]*$//;
$net =~ s/\.[^\.]*$//;
$net =~ s/\.[^\.]*$//;
push @zones, join('.', reverse(split('\.', $net))) . '.IN-ADDR.ARPA.';
}
return @zones;
}
}
sub get_reverse_zones_for_entity {
my $ctx = shift;
my $node = shift;
my $net;
if (($node =~ /loopback/) || ($node =~ /localhost/))
{
# do not use DNS to resolve localhsot
return;
}
if ($ctx->{hoststab} and $ctx->{hoststab}->{$node} and $ctx->{hoststab}->{$node}->[0]->{ip}) {
$node = $ctx->{hoststab}->{$node}->[0]->{ip};
}
my @tvars = getipaddr($node, GetNumber => 1, GetAllAddresses => 1);
my $tvar;
my @revs;
foreach $tvar (@tvars) {
foreach my $net (keys %{ $ctx->{nets} }) {
if ($ctx->{nets}->{$net}->{netn} == ($tvar & $ctx->{nets}->{$net}->{mask})) {
if ($net =~ /\./) { #IPv4/IN-ADDR.ARPA case.
my $maskstr = unpack("B32", pack("N", $ctx->{nets}->{$net}->{mask}));
my $maskcount = ($maskstr =~ tr/1//);
if ($maskcount >= 24)
{
$maskcount -= ($maskcount % 8); #e.g. treat the 27bit netmask as 24bit
}
else
{
$maskcount += ((8 - ($maskcount % 8)) % 8); #round to the next octet
}
my $newmask = 2**$maskcount - 1 << (32 - $maskcount);
my $rev = inet_ntoa(pack("N", ($tvar & $newmask)));
my @zone;
my @orig = split /\./, $rev;
while ($maskcount) {
$maskcount -= 8;
unshift(@zone, (shift @orig));
}
$rev = join('.', @zone);
$rev .= '.IN-ADDR.ARPA.';
push @revs, $rev;
} elsif ($net =~ /:/) { #v6/ip6.arpa case
$net =~ /\/(.*)/;
my $maskbits = $1;
unless ($maskbits and (($maskbits % 4) == 0)) {
die "Never expected this, $net should have had CIDR / notation... and the mask should be a factor of 4, if not, need work..."
}
my $netnum = Math::BigInt->new($ctx->{nets}->{$net}->{netn});
$netnum->brsft(128 - $maskbits);
my $prefix = $netnum->as_hex();
my $nibbs = $maskbits / 4;
$prefix =~ s/^0x//;
my $rev;
foreach (reverse(split //, $prefix)) {
$rev .= $_ . ".";
$nibbs--;
}
while ($nibbs) {
$rev .= "0.";
$nibbs--;
}
$rev .= "ip6.arpa.";
push @revs, $rev;
}
}
}
}
return @revs;
}
sub process_request {
my $request = shift;
$callback = shift;
my $oldmask = umask(0007);
my $ctx = {};
my @nodes = ();
my $hadargs = 0;
my $allnodes;
my $zapfiles;
my $help;
my $deletemode = 0;
my $external = 0;
my $slave = 0;
my $VERBOSE;
# Since the mandatory rpm perl-Net-DNS for makedns on sles12 (perl-Net-DNS-0.73-1.28) has a bug,
# user has to update it to a newer version
my @rpminfo = `rpm -qi perl-Net-DNS`;
my ($matchedver, $matchedrel);
foreach (@rpminfo) {
if (/Version\s*:\s*0.73/i) {
$matchedver = 1;
} elsif (/Release\s*:\s*1.28/i) {
$matchedrel = 1;
}
}
if ($matchedver && $matchedrel) {
xCAT::MsgUtils->message("E", { error => ["The necessary rpm perl-Net-DNS-0.73-1.28 needs be updated to a higher version for makedns to function. You can get a workable version perl-Net-DNS-0.80-1.x86_64.rpm from xCAT Dependency Repository. e.g. For sles12: zypper install perl-Net-DNS-0.80-1.<arch>"], errorcode => [1] }, $callback);
return;
}
if ($request->{arg}) {
$hadargs = 1;
@ARGV = @{ $request->{arg} };
Getopt::Long::Configure("no_pass_through");
Getopt::Long::Configure("bundling");
if (!GetOptions(
'a|all' => \$allnodes,
'n|new' => \$zapfiles,
'd|delete' => \$deletemode,
'e|external' => \$external,
's|slave' => \$slave,
'V|verbose' => \$VERBOSE,
'h|help' => \$help,
)) {
#xCAT::SvrUtils::sendmsg([1,"TODO: makedns Usage message"], $callback);
makedns_usage($callback);
umask($oldmask);
return;
}
}
if (defined($VERBOSE)) {
$::VERBOSE = $VERBOSE;
} else {
undef $::VERBOSE;
}
if ($::XCATSITEVALS{externaldns}) {
$external = 1;
}
if ($help)
{
makedns_usage($callback);
umask($oldmask);
return;
}
if ($deletemode && (!$request->{node}->[0]))
{
makedns_usage($callback);
umask($oldmask);
return;
}
$ctx->{deletemode} = $deletemode;
# check for site.domain
my @entries = xCAT::TableUtils->get_site_attribute("domain");
my $site_entry = $entries[0];
unless (defined($site_entry)) {
xCAT::SvrUtils::sendmsg([ 1, "domain not defined in site table" ], $callback);
umask($oldmask);
return;
}
$ctx->{domain} = $site_entry;
if ($::VERBOSE)
{
my $rsp;
push @{ $rsp->{data} },
"domain name = $site_entry";
xCAT::MsgUtils->message("I", $rsp, $callback);
}
if ($external) #need to check if /etc/resolv.conf existing
{
my $resolv = "/etc/resolv.conf";
my $cmd = "egrep '^nameserver|^search' $resolv";
my $acmd = "egrep '^nameserver|^domain' $resolv";
if (xCAT::Utils->isAIX())
{
$cmd = $acmd;
}
my @output = xCAT::Utils->runcmd($cmd, 0);
if ($::VERBOSE)
{
my $rsp;
my $outp = join(', ', @output);
push @{ $rsp->{data} },
"output from /etc/resolv.conf: $outp";
xCAT::MsgUtils->message("I", $rsp, $callback);
}
if ($::RUNCMD_RC != 0)
{
xCAT::SvrUtils::sendmsg([ 1, "You are using -e flag to update DNS records to an external DNS server, please ensure /etc/resolv.conf existing and pointed to this external DNS server." ], $callback);
umask($oldmask);
return;
}
}
# check for selinux disabled
my $rc = xCAT::Utils->isSELINUX();
if ($rc == 0)
{
xCAT::SvrUtils::sendmsg([ 0, "Warning:SELINUX is not disabled. The makedns command will not be able to generate a complete DNS setup. Disable SELINUX and run the command again." ], $callback);
}
my @entries = xCAT::TableUtils->get_site_attribute("nameservers");
my $sitens = $entries[0];
unless (defined($site_entry)) {
xCAT::SvrUtils::sendmsg([ 1, "nameservers not defined in site table" ], $callback);
umask($oldmask);
return;
}
if ($::VERBOSE)
{
my $rsp;
push @{ $rsp->{data} },
"nameservers = $sitens";
xCAT::MsgUtils->message("I", $rsp, $callback);
}
my $networkstab = xCAT::Table->new('networks', -create => 0);
unless ($networkstab) { xCAT::SvrUtils::sendmsg([ 1, 'Unable to enumerate networks, try to run makenetworks' ], $callback); }
my @networks = $networkstab->getAllAttribs('net', 'mask', 'ddnsdomain', 'domain', 'nameservers');
# exclude the net if it is using an external dns server.
foreach my $net (@networks)
{
if ($net and $net->{nameservers})
{
my $valid = 0;
my @myips;
my @myipsd = xCAT::NetworkUtils->my_ip_facing($net->{net});
my $myipsd_l = @myipsd;
unless ($myipsd[0]) { @myips = @myipsd[ 1 .. ($myipsd_l - 1) ]; }
foreach (split /,/, $net->{nameservers})
{
chomp $_;
foreach my $myip (@myips) {
if (($_ eq $myip) || ($_ eq '<xcatmaster>') || ($_ eq $sitens))
{
$valid += 1;
}
}
}
unless ($valid > 0)
{
$net = undef;
}
}
}
# if ($request->{node}) { #we have a noderange to process
# @nodes = @{$request->{node}};
#} elsif ($allnodes) {
if ($allnodes) {
#read all nodelist specified nodes
} else {
if (not $request->{node} and $deletemode) {
#when this was permitted, it really ruined peoples' days
xCAT::SvrUtils::sendmsg([ 1, "makedns -d without noderange or -a is not supported" ], $callback);
umask($oldmask);
return;
}
my @contents;
my $domain;
if ($request->{node}) { #leverage makehosts code to flesh out the options
require xCAT_plugin::hosts;
my @content1;
my @content2;
xCAT_plugin::hosts::add_hosts_content(nodelist => $request->{node}, callback => $callback, hostsref => \@content1);
xCAT_plugin::hosts::donics(nodes => $request->{node}, callback => $callback, hostsref => \@content2);
@contents = (@content1, @content2);
} else {
#legacy behavior, read from /etc/hosts
my $hostsfile;
open($hostsfile, "<", "/etc/hosts");
flock($hostsfile, LOCK_SH);
@contents = <$hostsfile>;
flock($hostsfile, LOCK_UN);
close($hostsfile);
}
my $addr;
my $name;
my $canonical;
my $aliasstr;
my @aliases;
my $names;
my @hosts;
my %nodehash;
my @eachhost;
my $invalid;
foreach (@contents) {
chomp; #no newline
s/#.*//; #strip comments;
s/^[ \t\n]*//; #remove leading whitespace
next unless ($_); #skip empty lines
($addr, $names) = split /[ \t]+/, $_, 2;
if ($addr !~ /^\d+\.\d+\.\d+\.\d+$/ and $addr !~ /^[abcdef0123456789:]+$/) {
xCAT::SvrUtils::sendmsg(":Ignoring line $_ in /etc/hosts, address seems malformed.", $callback);
next;
}
if ($addr =~ /(?:^|\.)0+(?=\d)/ and $addr !~ /^[abcdef0123456789:]+$/) {
xCAT::SvrUtils::sendmsg(":Ignoring line $_ in /etc/hosts, ip address octets can not contain leading zeroes.", $callback);
next;
}
unless ($names =~ /^[a-z0-9\. \t\n-]+$/i) {
xCAT::SvrUtils::sendmsg(":Ignoring line $_ in /etc/hosts, names $names contain invalid characters (valid characters include a through z, numbers and the '-', but not '_'", $callback);
next;
}
$invalid = "";
@eachhost = split(/ /,$names);
foreach my $hname (@eachhost) {
if ($hname =~ /^\./) {
xCAT::SvrUtils::sendmsg(":Ignoring line $_ in /etc/hosts, name $hname start with . ", $callback);
$invalid = $names;
last;
}
}
if ($invalid) {
next;
}
my ($host, $ip) = xCAT::NetworkUtils->gethostnameandip($addr);
push @hosts, $host;
$nodehash{$addr}{names} = $names;
$nodehash{$addr}{host} = $host;
}
# get the domains for each node - one call for all nodes in hosts file
my $nd = xCAT::NetworkUtils->getNodeDomains(\@hosts);
my %nodedomains = %$nd;
foreach my $n (keys %nodehash) {
$addr = $n;
$names = $nodehash{$n}{names};
# - need domain for this node
my $host = $nodehash{$n}{host};
$domain = $nodedomains{$host};
# remove the first . at domain name since it's not accepted by high dns parser
if ($domain =~ /^\./) { $domain =~ s/^\.//; }
($canonical, $aliasstr) = split /[ \t]+/, $names, 2;
if ($aliasstr) {
@aliases = split /[ \t]+/, $aliasstr;
} else {
@aliases = ();
}
my %names = ();
my $node = $canonical;
xCAT::SvrUtils::sendmsg(":Handling $node in /etc/hosts.", $callback);
unless ($canonical =~ /$domain/) {
$canonical .= "." . $domain;
}
# for only the sake of comparison, ensure consistant dot suffix
unless ($canonical =~ /\.\z/) { $canonical .= '.' }
foreach my $alias (@aliases) {
unless ($alias =~ /\.$domain\z/) {
$alias .= "." . $domain;
}
unless ($alias =~ /\.\z/) {
$alias .= '.';
}
if ($alias eq $canonical) {
next;
}
# remember alias for CNAM records later
$ctx->{aliases}->{$node}->{$alias} = 1;
}
# exclude the nodes not belong to any nets defined in networks table
# because only the nets defined in networks table will be add
# zones later.
my $found = 0;
foreach (@networks)
{
if (xCAT::NetworkUtils->ishostinsubnet($addr, $_->{mask}, $_->{net}))
{
$found = 1;
}
}
if ($found)
{
push @nodes, $node;
$ctx->{nodeips}->{$node}->{$addr} = 1;
}
else
{
unless ($node =~ /localhost/)
{
xCAT::SvrUtils::sendmsg(":Ignoring host $node, it does not belong to any nets defined in networks table or the net it belongs to is configured to use an external nameserver.", $callback);
}
}
}
}
my $hoststab = xCAT::Table->new('hosts', -create => 0);
if ($hoststab) {
$ctx->{hoststab} = $hoststab->getNodesAttribs(\@nodes, ['ip']);
}
$ctx->{nodes} = \@nodes;
foreach (@networks) {
my $maskn;
if ($_->{mask}) { #better be IPv4, we only do CIDR for v6, use the v4/v6 agnostic just in case
$maskn = getipaddr($_->{mask}, GetNumber => 1); #pack("N",inet_aton($_->{mask}));
} elsif ($_->{net} =~ /\/(.*)/) { #CIDR
my $maskbits = $1;
my $numbits;
if ($_->{net} =~ /:/) { #v6
$numbits = 128;
} elsif ($_->{net} =~ /\./) {
$numbits = 32;
} else {
umask($oldmask);
die "Network " . $_->{net} . " appears to be malformed in networks table";
}
$maskn = Math::BigInt->new("0b" . ("1" x $maskbits) . ("0" x ($numbits - $maskbits)));
}
$ctx->{nets}->{ $_->{net} }->{mask} = $maskn;
my $net = $_->{net};
$net =~ s/\/.*//;
$ctx->{nets}->{ $_->{net} }->{netn} = getipaddr($net, GetNumber => 1);
my $currzone;
foreach $currzone (getzonesfornet($_)) {
$ctx->{zonestotouch}->{$currzone} = 1;
if ($::VERBOSE)
{
my $rsp;
push @{ $rsp->{data} },
"zone info for this $net: $currzone";
xCAT::MsgUtils->message("I", $rsp, $callback);
}
}
}
my $passtab = xCAT::Table->new('passwd');
my $pent = $passtab->getAttribs({ key => 'omapi', username => 'xcat_key' }, ['password']);
if ($pent and $pent->{password}) {
$ctx->{privkey} = $pent->{password};
} #do not warn/error here yet, if we can't generate or extract, we'll know later
my @entries = xCAT::TableUtils->get_site_attribute("forwarders");
my $site_entry = $entries[0];
if (defined($site_entry)) {
my @forwarders = split /[ ,]/, $site_entry;
$ctx->{forwarders} = \@forwarders;
}
my @options = xCAT::TableUtils->get_site_attribute("emptyzonesenable");
my $empty_zones = $options[0];
if (defined($empty_zones)) {
if ($empty_zones =~ /^yes$|^no$/) {
$ctx->{empty_zones_enable} = $empty_zones;
} else {
my $rsp;
push @{ $rsp->{data} }, "emptyzonesenable from xCAT site table should be yes or no.";
xCAT::MsgUtils->message("E", $rsp, $callback);
return;
}
}
my @slave_ips;
my $dns_slaves = get_dns_slave();
if (scalar @$dns_slaves) {
foreach my $slave_hn (@$dns_slaves) {
my $slave_ip = xCAT::NetworkUtils->getipaddr($slave_hn);
push @slave_ips, $slave_ip;
}
$ctx->{slaves} = \@slave_ips;
}
$ctx->{domain} =~ s/^\.//; # remove . if it's the first char of domain name
$ctx->{zonestotouch}->{ $ctx->{domain} } = 1;
foreach (@networks) {
if ($_->{domain}) {
$_->{domain} =~ s/^\.//; # remove . if it's the first char of domain name
$ctx->{zonestotouch}->{ $_->{domain} } = 1;
}
}
# get the listen on port for the DNS server from site.dnsinterfaces
my @dnsifinsite = xCAT::TableUtils->get_site_attribute("dnsinterfaces");
if (@dnsifinsite)
#syntax should be like host|ifname1,ifname2;host2|ifname3,ifname2 etc or simply ifname,ifname2
{
my $dnsinterfaces = $dnsifinsite[0];
my $listenonifs;
foreach my $dnsif (split /;/, $dnsinterfaces) {
if ($dnsif =~ /\|/) { # there's host in the string
my ($hosts, $dnsif) = split /\|/, $dnsif;
if (!xCAT::NetworkUtils->thishostisnot($hosts)) {
$listenonifs = $dnsif;
} else {
# this host string might be a xcat group, try to test each node in the group
foreach my $host (xCAT::NodeRange->noderange($hosts)) {
unless (xCAT::NetworkUtils->thishostisnot($host)) {
$listenonifs = $dnsif;
last;
}
}
}
} else {
$listenonifs = $dnsif;
}
# get the ip for each interface and set it to $ctx->{dnslistenonifs}
if ($listenonifs) {
$listenonifs = "lo," . $listenonifs;
# get the ip address for each interface
my (@listenipv4, @listenipv6);
for my $if (split /,/, $listenonifs) {
my @ifaddrs = `ip addr show $if`;
foreach (@ifaddrs) {
if (/^\s*inet\s+([^ ]*)/) {
my $ip = $1;
$ip =~ s/\/.*//;
push @listenipv4, $ip;
} elsif (/^\s*inet6\s+([^ ]*)/) {
my $ip = $1;
$ip =~ s/\/.*//;
push @listenipv6, $ip;
}
}
}
if (@listenipv4) {
$ctx->{dnslistenonifs}->{ipv4} = \@listenipv4;
}
if (@listenipv6) {
$ctx->{dnslistenonifs}->{ipv6} = \@listenipv6;
}
last;
}
}
}
xCAT::SvrUtils::sendmsg("Getting reverse zones, this may take several minutes for a large cluster.", $callback);
foreach (@nodes) {
my @revzones = get_reverse_zones_for_entity($ctx, $_);
unless (@revzones)
{
if ($::VERBOSE)
{
my $rsp;
push @{ $rsp->{data} },
"No reverse zones for $_ ";
xCAT::MsgUtils->message("I", $rsp, $callback);
}
next;
}
$ctx->{revzones}->{$_} = \@revzones;
foreach (@revzones) {
$ctx->{zonestotouch}->{$_} = 1;
}
}
xCAT::SvrUtils::sendmsg("Completed getting reverse zones.", $callback);
if (1) {
#TODO: function to detect and return 1 if the master server is
# DNS SOA for all the zones we care about here, we are examining
# files to assure that our key is in named.conf, the zones we
# care about are there, and that if active directory is in use,
# allow the domain controllers to update specific zones
@entries = xCAT::TableUtils->get_site_attribute("directoryprovider");
$site_entry = $entries[0];
if (defined($site_entry) and $site_entry eq 'activedirectory') {
@entries = xCAT::TableUtils->get_site_attribute("directoryservers");
$site_entry = $entries[0];
if (defined($site_entry)) {
my @dservers = split /[ ,]/, $site_entry;
$ctx->{adservers} = \@dservers;
############################
# - should this include all domains?
# - multi-domains not supported with activedirectory
# - TODO in future release
###################
$ctx->{adzones} = {
"_msdcs." . $ctx->{domain} => 1,
"_sites." . $ctx->{domain} => 1,
"_tcp." . $ctx->{domain} => 1,
"_udp." . $ctx->{domain} => 1,
};
}
}
@entries = xCAT::TableUtils->get_site_attribute("dnsupdaters");
$site_entry = $entries[0];
if (defined($site_entry)) {
my @nservers = split /[ ,]/, $site_entry;
$ctx->{dnsupdaters} = \@nservers;
}
unless ($external) { # only generate the named.conf and zone files for xCAT dns when NOT using external dns
if ($zapfiles || $slave) { #here, we unlink all the existing files to start fresh
if ($::VERBOSE)
{
my $rsp;
push @{ $rsp->{data} },
"Stop named service";
xCAT::MsgUtils->message("I", $rsp, $callback);
}
if (xCAT::Utils->isAIX())
{
system("/usr/bin/stopsrc -s $service");
}
else
{
#system("service $service stop"); #named may otherwise hold on to stale journal filehandles
xCAT::Utils->stopservice("named");
}
my $conf = get_conf();
unlink $conf;
my $DBDir = get_dbdir();
if ($::VERBOSE)
{
my $rsp;
push @{ $rsp->{data} },
"get_dbdir: $DBDir";
xCAT::MsgUtils->message("I", $rsp, $callback);
}
foreach (<$DBDir/db.*>) {
unlink $_;
}
}
#We manipulate local namedconf
$ctx->{dbdir} = get_dbdir();
$ctx->{zonesdir} = get_zonesdir();
chmod 0775, $ctx->{dbdir}; # assure dynamic dns can actually execute against the directory
if ($::VERBOSE)
{
my $rsp;
push @{ $rsp->{data} },
"Update Named Conf dir $ctx->{dbdir} $ctx->{zonesdir}";
xCAT::MsgUtils->message("I", $rsp, $callback);
}
update_namedconf($ctx, $slave);
unless ($slave)
{
update_zones($ctx);
}
if ($ctx->{restartneeded}) {
xCAT::SvrUtils::sendmsg("Restarting $service", $callback);
if (xCAT::Utils->isAIX())
{
#try to stop named
my $cmd = "/usr/bin/stopsrc -s $service";
my @output = xCAT::Utils->runcmd($cmd, 0);
$cmd = "/usr/bin/startsrc -s $service";
@output = xCAT::Utils->runcmd($cmd, 0);
my $outp = join('', @output);
if ($::RUNCMD_RC != 0)
{
my $rsp = {};
$rsp->{data}->[0] = "Command failed: $cmd. Error message: $outp.\n";
xCAT::MsgUtils->message("E", $rsp, $callback);
return;
}
}
else
{
#my $cmd = "service $service stop";
#my @output=xCAT::Utils->runcmd($cmd, 0);
#my $outp = join('', @output);
#if ($::RUNCMD_RC != 0)
#{
# my $rsp = {};
# $rsp->{data}->[0] = "Command failed: $cmd. Error message: $outp.\n";
# xCAT::MsgUtils->message("E", $rsp, $callback);
# return;
#}
#$cmd = "service $service start";
#@output=xCAT::Utils->runcmd($cmd, 0);
#$outp = join('', @output);
#if ($::RUNCMD_RC != 0)
#{
# my $rsp = {};
# $rsp->{data}->[0] = "Command failed: $cmd. Error message: $outp.\n";
# xCAT::MsgUtils->message("E", $rsp, $callback);
# return;
#}
my $retcode = xCAT::Utils->restartservice("named");
if ($retcode != 0) {
my $rsp = {};
$rsp->{data}->[0] = "failed to start named.\n";
xCAT::MsgUtils->message("E", $rsp, $callback);
return;
}
}
xCAT::SvrUtils::sendmsg("Restarting named complete", $callback);
}
}
} else {
unless ($ctx->{privkey}) {
xCAT::SvrUtils::sendmsg([ 1, "Unable to update DNS due to lack of credentials in passwd to communicate with remote server" ], $callback);
}
}
if ($slave)
{
return;
}
# check if named is active before update dns records.
unless ($external) { # only start xCAT local dns when NOT using external dns
if (xCAT::Utils->isAIX())
{
my $cmd = "/usr/bin/lssrc -s $service |grep active";
my @output = xCAT::Utils->runcmd($cmd, 0);
if ($::RUNCMD_RC != 0)
{
$cmd = "/usr/bin/startsrc -s $service";
@output = xCAT::Utils->runcmd($cmd, 0);
my $outp = join('', @output);
if ($::RUNCMD_RC != 0)
{
my $rsp = {};
$rsp->{data}->[0] = "Command failed: $cmd. Error message: $outp.\n";
xCAT::MsgUtils->message("E", $rsp, $callback);
return;
}
}
}
else
{
my $needtostart = 1;
# If named is already restarted in the same time, then to avoid starting it again.
# Rare case (#3082): to avoid two named daemon co-existing
if ($ctx->{restartneeded}) {
sleep 1;
$needtostart = xCAT::Utils->checkservicestatus("named");
}
if ($needtostart != 0)
{
my $retcode = xCAT::Utils->startservice("named");
if ($retcode != 0)
{
my $rsp = {};
$rsp->{data}->[0] = "failed to start named.\n";
xCAT::MsgUtils->message("E", $rsp, $callback);
return;
}
}
}
}
#now we stick to Net::DNS style updates, with TSIG if possible. TODO: kerberized (i.e. Windows) DNS server support, maybe needing to use nsupdate -g....
if ($external)
{
# based on /etc/resolv.conf
$ctx->{resolver} = Net::DNS::Resolver->new();
}
else
{
# default to localhost
$ctx->{resolver} = Net::DNS::Resolver->new(nameservers => ['127.0.0.1']);
}
my $ret = add_or_delete_records($ctx);
unless ($ret) {
xCAT::SvrUtils::sendmsg("DNS setup is completed", $callback);
}
umask($oldmask);
}
sub get_zonesdir {
my $ZonesDir = get_dbdir();
my @entries = xCAT::TableUtils->get_site_attribute("bindzones");
my $site_entry = $entries[0];
if (defined($site_entry)) {
$ZonesDir = $site_entry;
}
return "$ZonesDir";
}
sub get_conf {
my $conf = "/etc/named.conf";
# is this ubuntu ?
if ($distro =~ /ubuntu.*/i || $distro =~ /debian.*/i) {
$conf = "/etc/bind/named.conf";
}
my @entries = xCAT::TableUtils->get_site_attribute("bindconf");
my $site_entry = $entries[0];
if (defined($site_entry)) {
$conf = $site_entry;
}
return "$conf";
}
sub get_dbdir {
my $DBDir;
my @entries = xCAT::TableUtils->get_site_attribute("binddir");
my $site_entry = $entries[0];
if (defined($site_entry)) {
$DBDir = $site_entry;
}
if (-d "$DBDir") {
return "$DBDir"
} elsif (-d "/var/named") {
return "/var/named/";
} elsif (-d "/var/lib/named") {
# Temp fix for bugzilla 73119
chown(scalar(getpwnam('root')), scalar(getgrnam('named')), "/var/lib/named");
return "/var/lib/named/";
}
elsif (-d "/var/lib/bind") {
return "/var/lib/bind/";
}
else {
mkpath "/var/named/";
chown(scalar(getpwnam('named')), scalar(getgrnam('named')), "/var/named");
return "/var/named/";
}
}
sub isvalidip {
#inet_pton/ntop good for ensuring an ip looks like an ip? or do string compare manually?
#for now, do string analysis, one problem with pton/ntop is that 010.1.1.1 would look diff from 10.1.1.1)
my $candidate = shift;
if ($candidate =~ /^(\d+)\.(\d+)\.(\d+).(\d+)\z/) {
return (
$1 >= 0 and $1 <= 255 and
$2 >= 0 and $2 <= 255 and
$3 >= 0 and $3 <= 255 and
$4 >= 0 and $4 <= 255
);
}
}
sub update_zones {
my $ctx = shift;
my $currzone;
my $dbdir = $ctx->{dbdir};
my $name = hostname;
my $node = $name;
# get the domain for the node - which is the local hostname
my ($host, $nip) = xCAT::NetworkUtils->gethostnameandip($node);
my @hosts;
push(@hosts, $host);
my $nd = xCAT::NetworkUtils->getNodeDomains(\@hosts);
my %nodedomains = %$nd;
my $domain = $nodedomains{$host};
xCAT::SvrUtils::sendmsg("Updating zones.", $callback);
if ($domain =~ /^\./) { # remove . if it's the first char of domain name
$domain =~ s/^\.//;
}
unless ($name =~ /\./) {
$name .= "." . $domain;
}
unless ($name =~ /\.\z/) {
$name .= '.';
}
my $ip = $node;
if ($ctx->{hoststab} and $ctx->{hoststab}->{$node} and $ctx->{hoststab}->{$node}->[0]->{ip}) {
$ip = $ctx->{hoststab}->{$node}->[0]->{ip};
unless (isvalidip($ip)) {
xCAT::SvrUtils::sendmsg([ 1, "The hosts table entry for $node indicates $ip as an ip address, which is not a valid address" ], $callback);
next;
}
} else {
unless ($ip = inet_aton($ip)) {
print "Unable to find an IP for $node in hosts table or via system lookup (i.e. /etc/hosts";
xCAT::SvrUtils::sendmsg([ 1, "Unable to find an IP for $node in hosts table or via system lookup (i.e. /etc/hosts" ], $callback);
next;
}
$ip = inet_ntoa($ip);
}
my @neededzones = keys %{ $ctx->{zonestotouch} };
push @neededzones, keys %{ $ctx->{adzones} };
my ($sec, $min, $hour, $mday, $mon, $year, $rest) = localtime(time);
my $serial = ($mday * 100) + (($mon + 1) * 10000) + (($year + 1900) * 1000000);
foreach $currzone (@neededzones) {
my $zonefilename = $currzone;
if ($currzone =~ /IN-ADDR\.ARPA/) {
$currzone =~ s/\.IN-ADDR\.ARPA.*//;
my @octets = split /\./, $currzone;
$currzone = join('.', reverse(@octets));
$zonefilename = $currzone;
#If needed, the below, but it was a fairly painfully restricted paradigm for zonefile names...
#} elsif (not $zonefilename =~ /_/) {
# $zonefilename =~ s/\..*//; #compatible with bind.pm
}
unless (-f $dbdir . "/db.$zonefilename") {
my $zonehdl;
open($zonehdl, ">>", $dbdir . "/db.$zonefilename");
flock($zonehdl, LOCK_EX);
seek($zonehdl, 0, 0);
truncate($zonehdl, 0);
print $zonehdl '$TTL 86400' . "\n";
print $zonehdl '@ IN SOA ' . $name . " root.$name ( $serial 10800 3600 604800 86400 )\n";
print $zonehdl " IN NS $name\n";
if ($name =~ /$currzone/) { #Must guarantee an A record for the DNS server
print $zonehdl "$name IN A $ip\n";
}
flock($zonehdl, LOCK_UN);
close($zonehdl);
if ($distro =~ /ubuntu.*/i || $distro =~ /debian.*/i) {
chown(scalar(getpwnam('root')), scalar(getgrnam('bind')), $dbdir . "/db.$zonefilename");
}
else {
chown(scalar(getpwnam('named')), scalar(getgrnam('named')), $dbdir . "/db.$zonefilename");
}
$ctx->{restartneeded} = 1;
}
}
xCAT::SvrUtils::sendmsg("Completed updating zones.", $callback);
}
sub update_namedconf {
my $ctx = shift;
my $slave = shift;
my $namedlocation = get_conf();
my $nameconf;
my @newnamed;
my $gotoptions = 0;
my $gotkey = 0;
my %didzones;
if (-r $namedlocation) {
my @currnamed = ();
open($nameconf, "<", $namedlocation);
flock($nameconf, LOCK_SH);
@currnamed = <$nameconf>;
flock($nameconf, LOCK_UN);
close($nameconf);
my $i = 0;
for ($i = 0 ; $i < scalar(@currnamed) ; $i++) {
my $line = $currnamed[$i];
if ($line =~ /^options +\{/) {
$gotoptions = 1;
my $skip = 0;
do {
#push @newnamed,"\t\t//listen-on-v6 { any; };\n";
if ($ctx->{forwarders} and $line =~ /forwarders \{/) {
push @newnamed, "\tforwarders \{\n";
$skip = 1;
foreach (@{ $ctx->{forwarders} }) {
push @newnamed, "\t\t" . $_ . ";\n";
}
push @newnamed, "\t};\n";
} elsif ($ctx->{empty_zones_enable} and $line =~ /empty-zones-enable/) {
push @newnamed, "\tempty-zones-enable " . $ctx->{empty_zones_enable} . ";\n";
} elsif ($ctx->{slaves} and $line =~ /allow-transfer \{/) {
push @newnamed, "\tallow-transfer \{\n";
$skip = 1;
foreach (@{ $ctx->{slaves} }) {
push @newnamed, "\t\t" . $_ . ";\n";
}
push @newnamed, "\t};\n";
} elsif ($ctx->{slaves} and $line =~ /also-notify \{/) {
push @newnamed, "\talso-notify \{\n";
$skip = 1;
foreach (@{ $ctx->{slaves} }) {
push @newnamed, "\t\t" . $_ . ";\n";
}
push @newnamed, "\t};\n";
} elsif (defined($ctx->{dnslistenonifs}) and defined($ctx->{dnslistenonifs}->{ipv4}) and $line =~ /listen-on \{/) {
push @newnamed, "\tlisten-on \{\n";
$skip = 1;
foreach (@{ $ctx->{dnslistenonifs}->{ipv4} }) {
push @newnamed, "\t\t" . $_ . ";\n";
}
push @newnamed, "\t};\n";
} elsif (defined($ctx->{dnslistenonifs}) and defined($ctx->{dnslistenonifs}->{ipv6}) and $line =~ /listen-on-v6 \{/) {
push @newnamed, "\tlisten-on-v6 \{\n";
$skip = 1;
foreach (@{ $ctx->{dnslistenonifs}->{ipv6} }) {
push @newnamed, "\t\t" . $_ . ";\n";
}
push @newnamed, "\t};\n";
} elsif ($skip) {
if ($line =~ /};/) {
$skip = 0;
}
} else {
push @newnamed, $line;
}
$i++;
$line = $currnamed[$i];
} while ($line !~ /^\};/);
push @newnamed, $line;
} elsif ($line =~ /^zone "([^"]*)" in \{/) {
my $currzone = $1;
if ($ctx->{zonestotouch}->{$currzone} or $ctx->{adzones}->{$currzone}) {
$didzones{$currzone} = 1;
my @candidate = ($line);
my $needreplace = 1;
do {
$i++;
$line = $currnamed[$i];
push @candidate, $line;
if ($line =~ /key xcat_key/) {
$needreplace = 0;
}
} while ($line !~ /^\};/); #skip the old file zone
unless ($needreplace) {
push @newnamed, @candidate;
next;
}
$ctx->{restartneeded} = 1;
push @newnamed, "zone \"$currzone\" in {\n", "\ttype master;\n", "\tallow-update {\n", "\t\tkey xcat_key;\n";
my @list;
if (not $ctx->{adzones}->{$currzone}) {
if ($ctx->{dnsupdaters}) {
@list = @{ $ctx->{dnsupdaters} };
}
} else {
if ($ctx->{adservers}) {
@list = @{ $ctx->{adservers} };
}
}
foreach (@list) {
push @newnamed, "\t\t$_;\n";
}
if ($currzone =~ /IN-ADDR\.ARPA/) {
my $net = $currzone;
$net =~ s/.IN-ADDR\.ARPA.*//;
my @octets = split /\./, $net;
$net = join('.', reverse(@octets));
push @newnamed, "\t};\n", "\tfile \"db.$net\";\n", "};\n";
} else {
my $zfilename = $currzone;
#$zfilename =~ s/\..*//;
push @newnamed, "\t};\n", "\tfile \"db.$zfilename\";\n", "};\n";
}
} else {
push @newnamed, $line;
do {
$i++;
$line = $currnamed[$i];
push @newnamed, $line;
} while ($line !~ /^\};/);
}
} elsif ($line =~ /^key xcat_key/) {
$gotkey = 1;
if ($ctx->{privkey}) {
#for now, assume the field is correct
#push @newnamed,"key xcat_key {\n","\talgorithm hmac-md5;\n","\tsecret \"".$ctx->{privkey}."\";\n","};\n\n";
push @newnamed, $line;
do {
$i++;
$line = $currnamed[$i];
push @newnamed, $line;
} while ($line !~ /^\};/);
} else {
push @newnamed, $line;
while ($line !~ /^\};/) { #skip the old file zone
if ($line =~ /secret \"([^"]*)\"/) {
my $passtab = xCAT::Table->new("passwd", -create => 1);
$passtab->setAttribs({ key => "omapi", username => "xcat_key" }, { password => $1 });
}
$i++;
$line = $currnamed[$i];
push @newnamed, $line;
}
}
} elsif ($line !~ /generated by xCAT/) {
push @newnamed, $line;
}
}
}
unless ($gotoptions) {
push @newnamed, "options {\n";
push @newnamed, "\tdirectory \"" . $ctx->{zonesdir} . "\";\n";
unless ($slave && xCAT::Utils->isLinux()) {
push @newnamed, "\tallow-recursion { any; };\n";
}
#push @newnamed,"\t\t//listen-on-v6 { any; };\n";
if ($ctx->{forwarders}) {
push @newnamed, "\tforwarders {\n";
foreach (@{ $ctx->{forwarders} }) {
push @newnamed, "\t\t$_;\n";
}
push @newnamed, "\t};\n";
}
if ($ctx->{empty_zones_enable}){
push @newnamed, "\tempty-zones-enable " . $ctx->{empty_zones_enable} . ";\n";
}
if ($slave) {
push @newnamed, "\tallow-transfer { any; };\n";
} else {
if ($ctx->{slaves}) {
push @newnamed, "\tnotify yes;\n";
push @newnamed, "\tallow-transfer {\n";
foreach (@{ $ctx->{slaves} }) {
push @newnamed, "\t\t$_;\n";
}
push @newnamed, "\t};\n";
push @newnamed, "\talso-notify {\n";
foreach (@{ $ctx->{slaves} }) {
push @newnamed, "\t\t$_;\n";
}
push @newnamed, "\t};\n";
}
}
# add the listen-on option
if (defined($ctx->{dnslistenonifs}) and defined($ctx->{dnslistenonifs}->{ipv4})) {
push @newnamed, "\tlisten-on \{\n";
foreach (@{ $ctx->{dnslistenonifs}->{ipv4} }) {
push @newnamed, "\t\t" . $_ . ";\n";
}
push @newnamed, "\t};\n"
}
if (defined($ctx->{dnslistenonifs}) and defined($ctx->{dnslistenonifs}->{ipv6})) {
push @newnamed, "\tlisten-on-v6 \{\n";
foreach (@{ $ctx->{dnslistenonifs}->{ipv6} }) {
push @newnamed, "\t\t" . $_ . ";\n";
}
push @newnamed, "\t};\n";
}
push @newnamed, "};\n\n";
}
# include external configuration file(s) if present in site.namedincludes
my @entries = xCAT::TableUtils->get_site_attribute("namedincludes");
my $site_entry = $entries[0];
if (defined($site_entry)) {
my @includes = split /[ ,]/, $site_entry;
foreach (@includes) {
if (defined($_)) {
my $line = "include \"$_\";\n";
unless (grep{/$line/} @newnamed) {
push @newnamed, "include \"$_\";\n";
}
}
push @newnamed, "\n";
}
}
unless ($slave) {
unless ($gotkey) {
unless ($ctx->{privkey}) { #need to generate one
$ctx->{privkey} = encode_base64(genpassword(32));
chomp($ctx->{privkey});
}
push @newnamed, "key xcat_key {\n", "\talgorithm hmac-md5;\n", "\tsecret \"" . $ctx->{privkey} . "\";\n", "};\n\n";
$ctx->{restartneeded} = 1;
}
}
my $cmd = "grep '^nameserver' /etc/resolv.conf | awk '{print \$2}'";
my @output = xCAT::Utils->runcmd($cmd, 0);
my $zone;
foreach $zone (keys %{ $ctx->{zonestotouch} }) {
if ($didzones{$zone}) { next; }
$ctx->{restartneeded} = 1; #have to add a zone, a restart will be needed
push @newnamed, "zone \"$zone\" in {\n";
if ($slave) {
push @newnamed, "\ttype slave;\n";
push @newnamed, "\tmasters { $output[0]; };\n";
} else {
push @newnamed, "\ttype master;\n", "\tallow-update {\n", "\t\tkey xcat_key;\n", "\t};\n";
foreach (@{ $ctx->{dnsupdaters} }) {
push @newnamed, "\t\t$_;\n";
}
}
if ($zone =~ /IN-ADDR\.ARPA/) {
my $net = $zone;
$net =~ s/.IN-ADDR\.ARPA.*//;
my @octets = split /\./, $net;
$net = join('.', reverse(@octets));
push @newnamed, "\tfile \"db.$net\";\n", "};\n";
} else {
my $zfilename = $zone;
#$zfilename =~ s/\..*//;
push @newnamed, "\tfile \"db.$zfilename\";\n", "};\n";
}
}
foreach $zone (keys %{ $ctx->{adzones} }) {
if ($didzones{$zone}) { next; }
$ctx->{restartneeded} = 1; #have to add a zone, a restart will be needed
push @newnamed, "zone \"$zone\" in {\n";
if ($slave) {
push @newnamed, "\ttype slave;\n";
push @newnamed, "\tmasters { $output[0]; };\n";
} else {
push @newnamed, "\ttype master;\n", "\tallow-update {\n", "\t\tkey xcat_key;\n";
foreach (@{ $ctx->{adservers} }) {
push @newnamed, "\t\t$_;\n";
}
}
my $zfilename = $zone;
#$zfilename =~ s/\..*//;
push @newnamed, "\t};\n", "\tfile \"db.$zfilename\";\n", "};\n\n";
}
# For AIX, add a hint zone
if (xCAT::Utils->isAIX())
{
unless (grep(/hint/, @newnamed))
{
push @newnamed, "zone \"\.\" in {\n", "\ttype hint;\n", "\tfile \"db\.cache\";\n", "};\n\n";
# Toutch the stub zone file
system("/usr/bin/touch $ctx->{dbdir}.'/db.cache'");
$ctx->{restartneeded} = 1;
if ($ctx->{forwarders})
{
my $dbcachefile = $ctx->{dbdir} . '/db.cache';
my $cmd = qq~dig @"$ctx->{forwarders}[0]" . ns >> $dbcachefile~;
my $outref = xCAT::Utils->runcmd("$cmd", 0);
if ($::RUNCMD_RC != 0)
{
my $rsp = {};
$rsp->{data}->[0] = "Failed to run command: $cmd.\n";
xCAT::MsgUtils->message("W", $rsp, $callback, 1);
}
}
}
}
my $newnameconf;
open($newnameconf, ">>", $namedlocation);
flock($newnameconf, LOCK_EX);
seek($newnameconf, 0, 0);
truncate($newnameconf, 0);
if ($newnameconf !~ /generated by xCAT/) {
print $newnameconf "\#generated by xCAT: /opt/xcat/sbin/makedns command \n";
}
for my $l (@newnamed) { print $newnameconf $l; }
flock($newnameconf, LOCK_UN);
close($newnameconf);
if ($distro =~ /ubuntu.*/i || $distro =~ /debian.*/i) {
chown(scalar(getpwnam('root')), scalar(getgrnam('bind')), $namedlocation);
}
else {
chown(scalar(getpwnam('root')), scalar(getgrnam('named')), $namedlocation);
}
}
sub add_or_delete_records {
my $ctx = shift;
xCAT::SvrUtils::sendmsg("Updating DNS records, this may take several minutes for a large cluster.", $callback);
unless ($ctx->{privkey}) {
my $passtab = xCAT::Table->new('passwd');
my $pent = $passtab->getAttribs({ key => 'omapi', username => 'xcat_key' }, ['password']);
if ($pent and $pent->{password}) {
$ctx->{privkey} = $pent->{password};
} else {
xCAT::SvrUtils::sendmsg([ 1, "Unable to find omapi key in passwd table" ], $callback);
}
}
my $node;
my @ips;
$ctx->{nsmap} = {}; #will store a map to known NS records to avoid needless redundant queries to sort nodes into domains
$ctx->{updatesbyzone} = {}; #sort all updates into their respective zones for bulk update for fewer DNS transactions
# get node domains
my $nd = xCAT::NetworkUtils->getNodeDomains(\@{ $ctx->{nodes} });
my %nodedomains = %{$nd};
foreach $node (@{ $ctx->{nodes} }) {
my $name = $node;
if (($name =~ /loopback/) || ($name =~ /localhost/))
{
next;
}
my $domain = $nodedomains{$node};
if ($domain =~ /^\./) { $domain =~ s/^\.//; } # remove . if it's the first char of domain name
unless ($name =~ /\.$domain\z/) { $name .= "." . $domain } # $name needs to represent fqdn, but must preserve $node as a nodename for cfg lookup
if ($ctx->{hoststab} and $ctx->{hoststab}->{$node} and $ctx->{hoststab}->{$node}->[0]->{ip}) {
@ips = ($ctx->{hoststab}->{$node}->[0]->{ip});
} else {
@ips = getipaddr($node, GetAllAddresses => 1);
if (not @ips and keys %{ $ctx->{nodeips}->{$node} }) {
@ips = keys %{ $ctx->{nodeips}->{$node} };
}
if (!defined($ips[0])) {
xCAT::SvrUtils::sendmsg([ 1, "Unable to find an IP for $node in hosts table or via system lookup (i.e. /etc/hosts)" ], $callback);
next;
}
}
foreach my $ip (@ips) {
$ctx->{currip} = $ip;
#time to update, A and PTR records, IPv6 still TODO
if ($ip =~ /\./) { #v4
$ip = join('.', reverse(split(/\./, $ip)));
$ip .= '.IN-ADDR.ARPA.';
} elsif ($ip =~ /:/) { #v6
$ip = getipaddr($ip, GetNumber => 1);
$ip = $ip->as_hex();
$ip =~ s/^0x//;
$ip = join('.', reverse(split(//, $ip)));
$ip .= '.ip6.arpa.';
} else {
die "ddns did not understand $ip result of lookup";
}
#ok, now it is time to identify which zones should actually hold the forward (A) and reverse (PTR) records and a nameserver to handle the request
my $revzone = $ip;
$ctx->{currnode} = $node;
$ctx->{currname} = $name;
$ctx->{currrevname} = $ip;
my $tmpdm;
unless ($domain =~ /\.$/) { $tmpdm = $domain . '.'; } #example.com becomes example.com.
find_nameserver_for_dns($ctx, $revzone);
find_nameserver_for_dns($ctx, $tmpdm);
}
}
my $zone;
foreach $zone (keys %{ $ctx->{updatesbyzone} }) {
unless (defined($ctx->{nsmap}->{$zone}) && $ctx->{nsmap}->{$zone}) {
next;
}
# the ns for zone might be multiple ones which separated with ,
foreach my $zoneserver (split(',', $ctx->{nsmap}->{$zone})) {
my $ip = xCAT::NetworkUtils->getipaddr($zoneserver);
if (!defined $ip) {
xCAT::SvrUtils::sendmsg([ 1, "Please make sure $zoneserver exist either in /etc/hosts or DNS." ], $callback);
return 1;
}
my $resolver = Net::DNS::Resolver->new(nameservers => [$ip]);
my $entry;
my $numreqs = 300; # limit to 300 updates in a payload, something broke at 644 on a certain sample, choosing 300 for now
my $update = Net::DNS::Update->new($zone);
foreach $entry (@{ $ctx->{updatesbyzone}->{$zone} }) {
if ($ctx->{deletemode}) {
$update->push(update => rr_del($entry));
} else {
$update->push(update => rr_add($entry));
}
$numreqs -= 1;
if ($numreqs == 0) {
# sometimes even the xcat_key is correct, but named still replies NOTAUTH, so retry
for (1 .. 3) {
$update->sign_tsig("xcat_key", $ctx->{privkey});
$numreqs = 300;
my $reply = $resolver->send($update);
if ($reply) {
if ($reply->header->rcode eq 'NOTAUTH') {
next;
}
if ($reply->header->rcode ne 'NOERROR') {
xCAT::SvrUtils::sendmsg([ 1, "Failure encountered updating $zone with entry '$entry', error was " . $reply->header->rcode . ". See more details in system log." ], $callback);
}
}
else {
xCAT::SvrUtils::sendmsg([ 1, "No reply received when sending DNS update to zone $zone" ], $callback);
}
last;
}
$update = Net::DNS::Update->new($zone); #new empty request
}
}
if ($numreqs != 300) { #either no entries at all to begin with or a perfect multiple of 300
# sometimes even the xcat_key is correct, but named still replies NOTAUTH, so retry
for (1 .. 3) {
$update->sign_tsig("xcat_key", $ctx->{privkey});
my $reply = $resolver->send($update);
if ($reply) {
if ($reply->header->rcode eq 'NOTAUTH') {
next;
}
if ($reply->header->rcode ne 'NOERROR') {
xCAT::SvrUtils::sendmsg([ 1, "Failure encountered updating $zone with entry '$entry', error was " . $reply->header->rcode . ". See more details in system log." ], $callback);
}
}
else {
xCAT::SvrUtils::sendmsg([ 1, "No reply received when sending DNS update to zone $zone" ], $callback);
}
last;
}
# sometimes resolver does not work if the update zone request sent so quick
sleep 1;
}
}
}
xCAT::SvrUtils::sendmsg("Completed updating DNS records.", $callback);
}
sub find_nameserver_for_dns {
my $ctx = shift;
my $zone = shift;
my $node = $ctx->{currnode};
my $ip = $ctx->{currip};
my $rname = $ctx->{currrevname};
my $name = $ctx->{currname};
unless ($name =~ /\.\z/) { $name .= '.' }
my @rrcontent;
if ($ip =~ /:/) {
@rrcontent = ("$name IN AAAA $ip");
} else {
@rrcontent = ("$name IN A $ip");
}
foreach (keys %{ $ctx->{nodeips}->{$node} }) {
unless ($_ eq $ip) {
if ($_ =~ /:/) {
push @rrcontent, "$name IN AAAA $_";
} else {
push @rrcontent, "$name IN A $_";
}
}
}
if (defined $ctx->{aliases}->{$node}) {
foreach (keys %{ $ctx->{aliases}->{$node} }) {
push @rrcontent, "$_ IN CNAME $name";
}
}
if ($ctx->{deletemode}) {
push @rrcontent, "$name TXT";
push @rrcontent, "$name A";
}
if ($zone =~ /IN-ADDR.ARPA/ or $zone =~ /ip6.arpa/) { #reverse style
@rrcontent = ("$rname IN PTR $name");
}
while ($zone) {
unless (defined $ctx->{nsmap}->{$zone}) { #ok, we already thought about this zone and made a decision
if ($zone =~ /^\.*192.IN-ADDR.ARPA\.*/ or $zone =~ /^\.*172.IN-ADDR.ARPA\.*/ or $zone =~ /127.IN-ADDR.ARPA\.*/ or $zone =~ /^\.*IN-ADDR.ARPA\.*/ or $zone =~ /^\.*ARPA\.*/) {
$ctx->{nsmap}->{$zone} = 0; #ignore zones that are likely to appear, but probably not ours
} elsif ($::XCATSITEVALS{ddnsserver}) {
$ctx->{nsmap}->{$zone} = $::XCATSITEVALS{ddnsserver};
} else {
my $reply = $ctx->{resolver}->query($zone, 'NS');
if ($reply) {
if ($reply->header->rcode ne 'NOERROR') {
xCAT::SvrUtils::sendmsg([ 1, "Failure encountered querying $zone, error was " . $reply->header->rcode ], $callback);
}
my @zoneserver;
foreach my $record ($reply->answer) {
if ($record->nsdname =~ /blackhole.*\.iana\.org/) {
$ctx->{nsmap}->{$zone} = 0;
} else {
push @zoneserver, $record->nsdname;
}
}
unless (defined($ctx->{nsmap}->{$zone})) {
$ctx->{nsmap}->{$zone} = join(',', @zoneserver);
}
} else {
$ctx->{nsmap}->{$zone} = 0;
}
}
}
if ($ctx->{nsmap}->{$zone}) { #we have a nameserver for this zone, therefore this zone is one to update
push @{ $ctx->{updatesbyzone}->{$zone} }, @rrcontent;
last;
} else { #we have it defined, but zero, means search higher domains. Possible to shortcut further by pointing to the right domain, maybe later
if ($zone !~ /\./) {
xCAT::SvrUtils::sendmsg([ 1, "Unable to find reverse zone to hold $node" ], $callback, $node);
last;
}
$zone =~ s/^[^\.]*\.//; #strip all up to and including first dot
unless ($zone) {
xCAT::SvrUtils::sendmsg([ 1, "Unable to find zone to hold $node" ], $callback, $node);
last;
}
}
}
}
sub genpassword
{
#Generate a pseudo-random password of specified length
my $length = shift;
my $password = '';
my $characters =
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890';
srand; #have to reseed, rand is not rand otherwise
while (length($password) < $length)
{
$password .= substr($characters, int(rand 63), 1);
}
return $password;
}
sub makedns_usage
{
my $callback = shift;
my $rsp;
push @{ $rsp->{data} },
"\n makedns - sets up domain name services (DNS).";
push @{ $rsp->{data} }, " Usage: ";
push @{ $rsp->{data} }, "\tmakedns [-h|--help ]";
push @{ $rsp->{data} }, "\tmakedns [-V|--verbose]";
push @{ $rsp->{data} }, "\tmakedns [-V|--verbose] [-e|--external] [-n|--new ] [noderange]";
push @{ $rsp->{data} }, "\tmakedns [-V|--verbose] [-e|--external] [-d|--delete noderange]";
push @{ $rsp->{data} }, "\n";
xCAT::MsgUtils->message("I", $rsp, $callback);
return 0;
}
sub get_dns_slave
{
# get all service nodes with servicenode.nameserver=2
my @sns;
my @slaves;
my $sntab = xCAT::Table->new('servicenode');
my @ents = $sntab->getAllAttribs('node', 'nameserver');
foreach my $sn (@ents)
{
if ($sn->{'nameserver'} == 2)
{
push @sns, $sn->{'node'};
}
}
@slaves = xCAT::NodeRange::noderange(join(',', @sns));
return \@slaves;
}
1;