contrib: remove DNSchrony from distribution
With the new pool directive chronyd is now able to replace unreachable NTP servers with newly resolved addresses automatically. Starting without DNS wasn't a problem since 1.25.
This commit is contained in:
Miroslav Lichvar
parent
407e47b306
commit
55fb7abc39
7 changed files with 0 additions and 1145 deletions
|
|
@ -1,339 +0,0 @@
|
|||
GNU GENERAL PUBLIC LICENSE
|
||||
Version 2, June 1991
|
||||
|
||||
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
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||||
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
Everyone is permitted to copy and distribute verbatim copies
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of this license document, but changing it is not allowed.
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|
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Preamble
|
||||
|
||||
The licenses for most software are designed to take away your
|
||||
freedom to share and change it. By contrast, the GNU General Public
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||||
License is intended to guarantee your freedom to share and change free
|
||||
software--to make sure the software is free for all its users. This
|
||||
General Public License applies to most of the Free Software
|
||||
Foundation's software and to any other program whose authors commit to
|
||||
using it. (Some other Free Software Foundation software is covered by
|
||||
the GNU Lesser General Public License instead.) You can apply it to
|
||||
your programs, too.
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|
||||
When we speak of free software, we are referring to freedom, not
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||||
price. Our General Public Licenses are designed to make sure that you
|
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have the freedom to distribute copies of free software (and charge for
|
||||
this service if you wish), that you receive source code or can get it
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To protect your rights, we need to make restrictions that forbid
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For example, if you distribute copies of such a program, whether
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GNU GENERAL PUBLIC LICENSE
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TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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0. This License applies to any program or other work which contains
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NO WARRANTY
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PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
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TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
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PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
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YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
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END OF TERMS AND CONDITIONS
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How to Apply These Terms to Your New Programs
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If you develop a new program, and you want it to be of the greatest
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To do so, attach the following notices to the program. It is safest
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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GNU General Public License for more details.
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Also add information on how to contact you by electronic and paper mail.
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If the program is interactive, make it output a short notice like this
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Gnomovision version 69, Copyright (C) year name of author
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|
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|
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be called something other than `show w' and `show c'; they could even be
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mouse-clicks or menu items--whatever suits your program.
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You should also get your employer (if you work as a programmer) or your
|
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school, if any, to sign a "copyright disclaimer" for the program, if
|
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necessary. Here is a sample; alter the names:
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|
||||
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
|
||||
`Gnomovision' (which makes passes at compilers) written by James Hacker.
|
||||
|
||||
<signature of Ty Coon>, 1 April 1989
|
||||
Ty Coon, President of Vice
|
||||
|
||||
This General Public License does not permit incorporating your program into
|
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proprietary programs. If your program is a subroutine library, you may
|
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consider it more useful to permit linking proprietary applications with the
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||||
library. If this is what you want to do, use the GNU Lesser General
|
||||
Public License instead of this License.
|
||||
|
|
@ -1,583 +0,0 @@
|
|||
#!/usr/bin/perl
|
||||
# Copyright (C) Paul Elliott 2002
|
||||
my($copyrighttext) = <<'EOF';
|
||||
# Copyright (C) Paul Elliott 2002
|
||||
# This program is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program; if not, write to the Free Software
|
||||
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
# SEE COPYING FOR DETAILS
|
||||
EOF
|
||||
|
||||
#modules we use.
|
||||
|
||||
use Socket;
|
||||
use Getopt::Std;
|
||||
use Net::DNS;
|
||||
use Tie::Syslog;
|
||||
use File::Temp qw/ :mktemp /;
|
||||
use File::Copy;
|
||||
|
||||
local($res) = new Net::DNS::Resolver;
|
||||
|
||||
#dns lookup of IP address.
|
||||
#returns ip or errorstring.
|
||||
sub gethostaddr($) #get ip address from host
|
||||
{
|
||||
my($host) = shift;
|
||||
$query = $res->search($host);
|
||||
if ($query) {
|
||||
foreach $rr ($query->answer) {
|
||||
next unless $rr->type eq "A";
|
||||
print $rr->address, "\n" if $pedebug;
|
||||
return $rr->address;
|
||||
}
|
||||
} else {
|
||||
print "query failed: ", $res->errorstring, "\n" if $pedebug;
|
||||
return $res->errorstring;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
#send messages to syslog
|
||||
|
||||
sub Log($$)
|
||||
{
|
||||
if ($log) {
|
||||
my($level) = shift;
|
||||
my($mess) =shift;
|
||||
|
||||
tie *MYLOG, 'Tie::Syslog',$level,$0,'pid','unix';
|
||||
print MYLOG $mess;
|
||||
|
||||
untie *MYLOG;
|
||||
}
|
||||
}
|
||||
|
||||
#send message to output or syslog
|
||||
#and die.
|
||||
|
||||
sub BadDie($)
|
||||
{
|
||||
my($myerr) =$!;
|
||||
my($mess)=shift;
|
||||
|
||||
if($log){
|
||||
tie *MYLOG, 'Tie::Syslog','local0.err',$0,'pid','unix';
|
||||
print MYLOG $mess;
|
||||
print MYLOG $myerr;
|
||||
|
||||
untie *MYLOG;
|
||||
|
||||
} else {
|
||||
print "$mess\n$myerr\n";
|
||||
}
|
||||
die $mess;
|
||||
}
|
||||
|
||||
sub isIpAddr($) #return true if looks like ip address
|
||||
{
|
||||
my($ip) = shift;
|
||||
return 1 if ( $ip =~ m/$ipOnlyPAT/ );
|
||||
return 0;
|
||||
}
|
||||
sub isHostname($) #return true if looks like ip address
|
||||
{
|
||||
my($ip) = shift;
|
||||
return 1 if ( $ip =~ m/$hostnameOnlyPAT/ );
|
||||
return 0;
|
||||
}
|
||||
|
||||
#send commands to chronyc by piping.
|
||||
sub chronyc($) #send commands to chronyc
|
||||
{
|
||||
my($command) = shift;
|
||||
my($err) = "/var/tmp/chronyc.log";
|
||||
my($chronyP) = "/usr/local/bin/chronyc";
|
||||
open(CHRONY, "| $chronyP 1>$err 2>&1");
|
||||
|
||||
print CHRONY "$passwd$command\n";
|
||||
|
||||
close(CHRONY);
|
||||
|
||||
Log('local0.info',"chronyc command issued=$command");
|
||||
#look at status lines till return bad.
|
||||
open( IN, "<$err");
|
||||
my($status);
|
||||
while (<IN>) {
|
||||
$status = $_;
|
||||
|
||||
unless ( m/\A200 OK/ ) {
|
||||
last;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
$status ="" if ( $status =~ m/\A200 OK/ );
|
||||
close(IN);
|
||||
unlink $err;
|
||||
Log('local0.info',"chronyc results=$status");
|
||||
return $status;
|
||||
|
||||
}
|
||||
|
||||
#common patterns
|
||||
|
||||
# an ip address patern
|
||||
local($ipPAT) = qr/\d{1,3}(?:\.\d{1,3}){3}/;
|
||||
# an hostname pattern
|
||||
local($hostnamePAT) = qr/\w+(?:\.\w+)*/;
|
||||
#line with hostname only
|
||||
local($hostnameOnlyPAT) = qr/\A$hostnamePAT\Z/;
|
||||
#line with ip address only
|
||||
local($ipOnlyPAT) =qr/\A$ipPAT\Z/;
|
||||
|
||||
#options hash
|
||||
my(%opts);
|
||||
|
||||
|
||||
getopts('nuadslPSC', \%opts);
|
||||
|
||||
local($log) = ( $opts{'l'} ) ? 1 : 0;
|
||||
|
||||
my($offline) = !( $opts{'n'} ) ;
|
||||
my($offlineS) = ( $opts{'n'} ) ? " " : " offline" ;
|
||||
|
||||
# paul elliotts secret debug var. no one will ever find out about it.
|
||||
local($pedebug)=( ($ENV{"PAULELLIOTTDEBUG"}) or ($opts{P}) );
|
||||
|
||||
if ($opts{C}) {
|
||||
|
||||
print $copyrighttext;
|
||||
exit 0;
|
||||
}
|
||||
|
||||
|
||||
print <<"EOF" unless $opts{'S'};
|
||||
$0, Copyright (C) 2002 Paul Elliott
|
||||
$0 comes with ABSOLUTELY NO WARRANTY; for details
|
||||
invoke $0 -C. This is free software, and you are welcome
|
||||
to redistribute it under certain conditions; invoke $0 -C
|
||||
for details.
|
||||
EOF
|
||||
|
||||
|
||||
|
||||
local($passwd);
|
||||
|
||||
# password to send to chronyc
|
||||
my($pl) = $ENV{"CHRONYPASSWORD"};
|
||||
|
||||
#password comand to send to chronyc
|
||||
if ( $pl ) {
|
||||
$passwd = "password $pl\n";
|
||||
} else {
|
||||
$passwd = "";
|
||||
}
|
||||
print "passwd=$passwd\n" if ($pedebug);
|
||||
|
||||
my(%host2ip);
|
||||
|
||||
# hash of arrays. host2ip{$host}[0] is ip address for this host
|
||||
# host2ip{$host}[1] is rest of paramenters for this host exc offline.
|
||||
|
||||
#if debuging do chrony.conf in current directory.
|
||||
my($listfile) =( ($pedebug) ? "./chrony.conf" : "/etc/chrony.conf") ;
|
||||
|
||||
# This section reads in the old data about
|
||||
# hostnames IP addresses and server parameters
|
||||
# data is stored as it would be in chrony.conf
|
||||
# file i.e.:
|
||||
#># HOSTNAME
|
||||
#>server IPADDR minpoll 5 maxpoll 10 maxdelay 0.4 offline
|
||||
#
|
||||
# the parameter offline is omitted if the -n switch is specified.
|
||||
# first parameter is the filename of the file usually
|
||||
# is /etc/DNSchrony.conf
|
||||
# this is where we store the list of DNS hosts.
|
||||
# hosts with static IP address shold be kept in chrony.conf
|
||||
|
||||
# this is header that marks dnyamic host section
|
||||
my($noedithead)=<<'EOF';
|
||||
## DNSchrony dynamic dns server section. DO NOT EDIT
|
||||
## per entry FORMAT:
|
||||
## |--------------------------------------------|
|
||||
## |#HOSTNAME |
|
||||
## |server IP-ADDRESS extra-params [ offline ] |
|
||||
## |--------------------------------------------|
|
||||
EOF
|
||||
#patern that recognizes above.
|
||||
my($noeditheadPAT) =
|
||||
qr/\#\#\s+DNSchrony\s+dynamic\s+dns\s+server\s+section\.\s+DO\s+NOT\s+EDIT\s*/;
|
||||
|
||||
#end of header marker.
|
||||
my($noeditheadend)=<<'EOF';
|
||||
## END OF DNSchrony dynamic dns server section.
|
||||
EOF
|
||||
|
||||
#pattern that matches above.
|
||||
my($noeditheadendPAT)=
|
||||
qr/\#\#\s+END\s+OF\s+DNSchrony\s+dynamic\s+dns\s+server\s+section.\s*/;
|
||||
|
||||
#array to hold non dns portion of chrony.conf
|
||||
my(@chronyDconf);
|
||||
|
||||
|
||||
my($ip);
|
||||
my($rest);
|
||||
my($host);
|
||||
|
||||
# for each entry in the list of hosts....
|
||||
open(READIN, "<$listfile") or BadDie("Can not open $listfile");
|
||||
|
||||
# read till dynamic patern read save in @chronyDconf
|
||||
|
||||
while ( <READIN> ) {
|
||||
|
||||
my($line) = $_;
|
||||
|
||||
last if ( m/\A$noeditheadPAT\Z/ );
|
||||
|
||||
push(@chronyDconf,$line);
|
||||
|
||||
}
|
||||
|
||||
while ( <READIN> ) {
|
||||
|
||||
#end loop when end of header encountered
|
||||
last if ( m/\A$noeditheadendPAT/ );
|
||||
|
||||
# parse the line giving ip address, extra pamamters, and host
|
||||
#do host comment line first
|
||||
($host) = m{
|
||||
\A\#\s*
|
||||
($hostnamePAT)
|
||||
\s*\z
|
||||
}xio;
|
||||
|
||||
#no match skip this line.
|
||||
next unless ( $host );
|
||||
|
||||
# read next line
|
||||
$_ = <READIN>;
|
||||
|
||||
# parse out ip address extra parameters.
|
||||
($ip,$rest) =
|
||||
m{
|
||||
\A
|
||||
\s*
|
||||
server #server comand
|
||||
\s+
|
||||
($ipPAT) #ip address
|
||||
(?ixo: \s )
|
||||
\s*
|
||||
(
|
||||
(?(?!
|
||||
(?iox: offline )? #skip to offline #
|
||||
\s* #or #
|
||||
\Z
|
||||
).)*
|
||||
)
|
||||
(?ixo:
|
||||
\s*
|
||||
(?ixo: offline )? #consume to #
|
||||
\s*
|
||||
\Z
|
||||
)
|
||||
}xio ;
|
||||
|
||||
#if failure again.
|
||||
next unless ( $ip );
|
||||
|
||||
$rest =~ s/\s*\z//; #remove trail blanks
|
||||
#from parameters
|
||||
# store the data in the list
|
||||
# key is host name value is
|
||||
# array [0] is ip address
|
||||
# [1] is other parameters
|
||||
$host2ip{$host} = [$ip,$rest] ;
|
||||
print "ip=$ip rest=$rest host=$host<\n" if $pedebug;
|
||||
|
||||
}
|
||||
#read trailing line into @chronyDconf
|
||||
while ( <READIN> ) {
|
||||
|
||||
push(@chronyDconf,$_);
|
||||
|
||||
}
|
||||
|
||||
close(READIN) or BadDie("can not close $listfile");
|
||||
|
||||
#if the add command:
|
||||
# command can be HOST=IPADDRESS OTHER_PARAMETERS
|
||||
# means add the server trust the ip address geven with out a dns lookup
|
||||
# good for when dns is down but we know the ip addres
|
||||
# or
|
||||
# HOST OTHER_PARAMETERS
|
||||
#we lookup the ip address with dns.
|
||||
|
||||
if ($opts{'a'}) {
|
||||
my($param)= shift;
|
||||
|
||||
|
||||
# parse the param is it hostname
|
||||
if ( ($host,$ip) = $param =~ m/\A($hostnamePAT)=($ipPAT)\Z/ ) {
|
||||
printf "ip=$ip host=$host\n" if ($pedebug);
|
||||
} else {
|
||||
|
||||
$host = $param;
|
||||
|
||||
# get the ip address
|
||||
$ip = gethostaddr($host);
|
||||
|
||||
if ( ! isIpAddr($ip) or ! isHostname($host) ) {
|
||||
print "query failed: ", $ip, "host=$host\n" if $pedebug;
|
||||
exit 1;
|
||||
}
|
||||
}
|
||||
printf "ip=$ip host=$host\n" if ($pedebug);
|
||||
|
||||
# add the server using chronyc
|
||||
my($status) = chronyc("add server $ip $rest");
|
||||
if ($status) { #chronyc error
|
||||
print "chronyc failed, status=$status\n";
|
||||
exit 1;
|
||||
}
|
||||
|
||||
# get rest of arguements
|
||||
$rest = join( ' ', @ARGV);
|
||||
print "rest=$rest\n" if ($pedebug);
|
||||
|
||||
#save node in hash
|
||||
$host2ip{$host} = [$ip,$rest] ;
|
||||
print "ip=$ip rest=$rest host=$host<\n" if $pedebug;
|
||||
|
||||
}
|
||||
|
||||
#delete command if arguement is ip address
|
||||
#just delete it
|
||||
#if a hostname look it up
|
||||
#then delete it.
|
||||
|
||||
if ($opts{'d'}) {
|
||||
$host = shift;
|
||||
|
||||
#get host name is it ap address
|
||||
if ( isIpAddr($host) ) { # if ip address
|
||||
my($hostIT);
|
||||
my($found) =0;
|
||||
foreach $hostIT (keys(%host2ip) ) { #search for match
|
||||
if ( $host2ip{$hostIT}[0] eq $host) {
|
||||
$found=1; #record match
|
||||
}
|
||||
} #end of search
|
||||
if ($found) { #if match found
|
||||
my($status) = chronyc("delete $host"); #chronyc
|
||||
if ($status) { #chronyc error
|
||||
print "chronyc failed, status=$status\n";
|
||||
exit 1;
|
||||
} else { #reiterate
|
||||
foreach $hostIT (keys(%host2ip) ) {
|
||||
if ( $host2ip{$hostIT}[0] eq $host) {
|
||||
delete $host2ip{$hostIT}; #deleting match hosts
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
} else { #else not ip address
|
||||
#must be hostname
|
||||
if ( ! $host2ip{$host} ) {
|
||||
print "No such host as $host listed\n";
|
||||
exit 1;
|
||||
}
|
||||
#get ip address
|
||||
$ip=gethostaddr($host);
|
||||
if ( ! isIpAddr($ip) ) { #no ip address
|
||||
print "query failed: ", $ip, "\n" if $pedebug;
|
||||
exit 1;
|
||||
}
|
||||
|
||||
printf "ip=$ip host=$host\n" if ($pedebug);
|
||||
|
||||
my($listed_host_ip) = $host2ip{$host}[0]; # get the ip address saved
|
||||
|
||||
if ( $ip ne $listed_host_ip) {
|
||||
print
|
||||
"Info: listed host ip=>$listed_host_ip".
|
||||
"< is different from DNS ip=>$ip<\n";
|
||||
$ip = $listed_host_ip;
|
||||
}
|
||||
|
||||
# delete the server
|
||||
my($status) = chronyc("delete $listed_host_ip\n");
|
||||
|
||||
if ($status) {
|
||||
print "chronyc failed, status=$status\n";
|
||||
exit 1;
|
||||
}
|
||||
#delete table entry
|
||||
delete$host2ip{$host};
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
#update for each host who's dns ip address has changed
|
||||
#delete the old server and add the new. update the record.
|
||||
if ($opts{'u'}) {
|
||||
my($command);
|
||||
|
||||
my(%prospective); # store new IP address we
|
||||
#are thinking of changing.
|
||||
|
||||
Log('local0.info',
|
||||
"Now searching for modified DNS entries.");
|
||||
|
||||
foreach $host (keys(%host2ip)) { #for each listed host
|
||||
my($old_ip) = $host2ip{$host}[0]; #get old ip
|
||||
$rest = $host2ip{$host}[1]; #extra params
|
||||
|
||||
$ip = gethostaddr($host); #get new ip from dns
|
||||
#if error
|
||||
if ( ! isIpAddr($ip) or ! isHostname($host) ) {
|
||||
print "query failed: ", $ip, "host=$host\n";
|
||||
|
||||
Log('local0.err',"query failed: ". $ip . "host=$host");
|
||||
|
||||
exit 1;
|
||||
}
|
||||
|
||||
next if($ip eq $old_ip); #if ip not changed, skip
|
||||
|
||||
Log('local0.info',"Ip address for $host has changed. Old IP address=".
|
||||
"$old_ip, new IP address=$ip");
|
||||
# add command to delete old host, add the new.
|
||||
$command = $command . "delete $old_ip\n" .
|
||||
"add server $ip $rest\n";
|
||||
|
||||
# we are now thinking about changing this host ip
|
||||
$prospective{$host} = [$ip,$rest];
|
||||
}
|
||||
# submit all the accumulated chronyc commands if any.
|
||||
if ($command) {
|
||||
$status = chronyc($command);
|
||||
if ($status) {
|
||||
print "chronyc failed, status=$status\n";
|
||||
Log('local0.err',"query failed: ". $ip . "host=$host");
|
||||
exit 1;
|
||||
}
|
||||
} else { #if no commands exit
|
||||
exit 0; #because no rewrite of file needed
|
||||
}
|
||||
|
||||
#copy prospective modifications back into main table.
|
||||
#we now know that all these mods were done with chronyc
|
||||
foreach $host (keys(%prospective)) {
|
||||
my($ip) = $prospective{$host}[0];
|
||||
$rest = $prospective{$host}[1];
|
||||
$host2ip{$host} = [$ip,$rest];
|
||||
}
|
||||
}
|
||||
|
||||
#starting for each entry we have read in from the old list
|
||||
# add the server in chronyc
|
||||
# this option is seldom used.
|
||||
|
||||
if ($opts{'s'}) {
|
||||
my($command)="";
|
||||
|
||||
foreach $host (keys(%host2ip)) {
|
||||
$command = $command . "add server $host2ip{$host}[0] ".
|
||||
"$host2ip{$host}[1]\n";
|
||||
}
|
||||
my($status) = chronyc($command);
|
||||
if ($status) {
|
||||
print "chronyc failed, status=$status\n";
|
||||
exit 1;
|
||||
}
|
||||
|
||||
}
|
||||
# write out the data file in format
|
||||
#># HOSTNAME
|
||||
#>server IPADDRESS extra parameters [offline]
|
||||
# offline is omitted if -n switch is specified.
|
||||
|
||||
my(@value);
|
||||
my($such);
|
||||
{
|
||||
# to start out we write to temporary file.
|
||||
(my($writeout) , my($outname)) = mkstemp( "${listfile}.outXXXXXXX");
|
||||
|
||||
$outname or BadDie("can not open for $listfile");
|
||||
|
||||
|
||||
# save the chrony.conf part!
|
||||
# and write the DYNAMIC header
|
||||
print $writeout @chronyDconf, $noedithead;
|
||||
|
||||
|
||||
# for each entry
|
||||
foreach $host (keys(%host2ip) ){
|
||||
|
||||
#write the record
|
||||
|
||||
# write the comment that indicates the hostname
|
||||
# and the server command.
|
||||
print $writeout
|
||||
"\# $host\nserver $host2ip{$host}[0] $host2ip{$host}[1]${offlineS}\n" ;
|
||||
|
||||
print
|
||||
"server $host2ip{$host}[0] $host2ip{$host}[1]${offlineS}\# $host\n"
|
||||
if $pedebug;
|
||||
|
||||
}
|
||||
|
||||
#WRITE THE end of dnyamic marker comment
|
||||
print $writeout $noeditheadend;
|
||||
|
||||
# close the output file which was a temporary file.
|
||||
close($writeout) or BadDie("can not close $outname");
|
||||
|
||||
# we now begin a intracate dance to make the the temporary
|
||||
# the main chrony.conf
|
||||
#
|
||||
# if there is a chrony.conf.BAK save it to a temporary.
|
||||
# rename chrony.conf to chrony.conf.BAK
|
||||
# rename the temporary to chrony.conf
|
||||
# if there already was a chrony.conf.BAK, unlink the copy of this.
|
||||
|
||||
my($backname) = "$listfile\.BAK";
|
||||
my($backplain) = ( -f $backname );
|
||||
my($saveback);
|
||||
#if chrony.conf.BAK exists rename to a temporary.
|
||||
if ($backplain ) {
|
||||
|
||||
$saveback = mktemp("${backname}.bakXXXXXXX");
|
||||
move($backname,$saveback) or
|
||||
BadDie "unable to move $backname to $savename";
|
||||
|
||||
}
|
||||
|
||||
# rename old chrony.conf to chrony.conf.BAK
|
||||
move($listfile,$backname) or
|
||||
BadDie "unable to move $listfile to $backname";
|
||||
|
||||
# rename our output to chrony.conf
|
||||
move($outname,$listfile) or
|
||||
BadDie "unable to move $outname to $listfile";
|
||||
|
||||
#if there was a temporary chrony.conf.BAK that we saved to temp
|
||||
#unlink it
|
||||
unlink($saveback) or BadDie "unable to unlink $saveback" if($backplain);
|
||||
|
||||
}
|
||||
|
|
@ -1,21 +0,0 @@
|
|||
#!/usr/bin/bash
|
||||
|
||||
# $1 is chrony password.
|
||||
# $2 is hostname to add or hostname=ipaddres
|
||||
# $3-$9 is rest of extra server parameters
|
||||
|
||||
FIRST="$1"
|
||||
HOST="$2"
|
||||
shift 2
|
||||
|
||||
#remaining parameters a the other paramaters to server command
|
||||
#excluding "offline"
|
||||
ARGS="$*"
|
||||
|
||||
#if none use default taken from chrony documentation.
|
||||
DEF="minpoll 5 maxpoll 10 maxdelay 0.4"
|
||||
|
||||
DARGS=${ARGS:-$DEF}
|
||||
|
||||
CHRONYPASSWORD=$FIRST \
|
||||
/usr/local/bin/DNSchrony.pl -a "$HOST" "$DARGS"
|
||||
|
|
@ -1,7 +0,0 @@
|
|||
#!/usr/bin/bash
|
||||
|
||||
# $1 is chrony password.
|
||||
# $2 host to be deleted if ip nn.n.n.n then no DNS used
|
||||
|
||||
CHRONYPASSWORD=$1 \
|
||||
/usr/local/bin/DNSchrony.pl -d $2
|
||||
|
|
@ -1,7 +0,0 @@
|
|||
#!/usr/bin/bash
|
||||
|
||||
# $1 is chrony password.
|
||||
|
||||
|
||||
CHRONYPASSWORD=$1 \
|
||||
/usr/local/bin/DNSchrony.pl -ulS
|
||||
|
|
@ -1,166 +0,0 @@
|
|||
Copyright (C) Paul Elliott 2002
|
||||
|
||||
|
||||
DNSchrony.pl version -2.0
|
||||
|
||||
Problem: If you look at the list of secondary NTP servers:
|
||||
http://www.eecis.udel.edu/~mills/ntp/clock2.htm
|
||||
|
||||
you will find statements like this:
|
||||
|
||||
"Note: IP addresses are subject to change; please use DNS"
|
||||
|
||||
These servers represent a problem for chrony. Chrony is a program
|
||||
designed to work on hosts with an intermittent connection to the
|
||||
internet. Often no DNS is available when chrony starts. As chrony
|
||||
is currently designed, chronyd never sees a DNS host name. If a
|
||||
user specifies one when using chronyc's "add server" command, the
|
||||
DNS lookup is done by chronyc and an IP address is passed to chronyd.
|
||||
|
||||
One can imagine I suppose, a redesign to chrony in which chronyd
|
||||
keeps track of DNS changes. But this has problems, all the time
|
||||
chronyd is fooling around with DNS, it would not be keeping track
|
||||
of its prime function, what the clocks and NTP servers are saying.
|
||||
This could result in poorer performance. Or perhaps you say that
|
||||
chronyd should be multi threaded. One thread to fool with DNS
|
||||
and another to keep track of time. But this introduces a great
|
||||
deal of complexity, and complexity is the enemy of elegant robust
|
||||
code. Besides, Richard probably has better things to do.
|
||||
|
||||
I have attempted to address this problem with a humble perl script,
|
||||
which I now release under the GPL: DNSchrony.pl
|
||||
|
||||
PLEA FOR HELP FROM EXPERIENCED PERL HACKERS.
|
||||
|
||||
Please go thru the code and find errors and improvements.
|
||||
I am not quite an polished perl hacker. Please fix bugs and
|
||||
make improvements. It needs better documentation. Someone
|
||||
who knows how, put in some POD.
|
||||
|
||||
END OF PLEA
|
||||
|
||||
Philosophy of DNSchrony.pl: keep a list of servers that use
|
||||
DNS. From time to time, hopefully when DNS is up, go thru
|
||||
the list lookup all the hostnames and see if any ip addresses have
|
||||
changed. If any have changed, update our list and do chronyc
|
||||
"delete" and "add server" commands so that chronyd now talks to
|
||||
the right NTP server.
|
||||
|
||||
Additional nuance: keep the list in /etc/chrony.conf in the
|
||||
form of comments starting with "#" and "server" commands
|
||||
legal in a chrony.conf file. Format of a list entry:
|
||||
|
||||
# hostname
|
||||
server IP-ADDRESS extra server parameters
|
||||
|
||||
These entries are delimited by special comments that allow
|
||||
DNSchrony.pl to find them and also tell humans not to mess with them.
|
||||
|
||||
Example of such a section of a chrony.conf file:
|
||||
|
||||
dumpdir /var/log/chrony
|
||||
rtcfile /etc/chrony.rtc
|
||||
|
||||
## DNSchrony dynamic dns server section. DO NOT EDIT
|
||||
## per entry FORMAT:
|
||||
## |--------------------------------------------|
|
||||
## |#HOSTNAME |
|
||||
## |server IP-ADDRESS extra-params [ offline ] |
|
||||
## |--------------------------------------------|
|
||||
# tock.greyware.com
|
||||
server 208.14.208.44 minpoll 5 maxpoll 10 maxdelay 0.4 offline
|
||||
# tick.greyware.com
|
||||
server 208.14.208.19 minpoll 5 maxpoll 10 maxdelay 0.4 offline
|
||||
# ntppub.tamu.edu
|
||||
server 128.194.254.9 minpoll 5 maxpoll 10 maxdelay 0.4 offline
|
||||
## END OF DNSchrony dynamic dns server section.
|
||||
|
||||
This allows the list of dynamic DNS servers to be preserved
|
||||
when chronyd is stoped/started.
|
||||
|
||||
All servers that do not have ip addresses subject to change
|
||||
should be put in the regular part of chrony.conf as described
|
||||
in the chrony documentation.
|
||||
|
||||
Security philosophy: DNSchrony does no security checking but
|
||||
relies on other security factors.
|
||||
|
||||
Users without the privilege to modify /etc/chrony.conf and the
|
||||
directory /etc will be unable to use DNSchrony to do so, because
|
||||
of file protections. DNSchrony passes thru passwords to chronyc.
|
||||
Users that do not know the correct chronyc password will be
|
||||
unable to get chronyd do do anything. Thus, DNSchrony passes
|
||||
the buck to these other security features.
|
||||
|
||||
INSTALLATION:
|
||||
|
||||
copy the files: DNSchronyADD DNSchronyUPDATE DNSchronyDELETE DNSchrony.pl
|
||||
to /usr/local/bin. Backup the file /etc/chrony.conf leave hosts
|
||||
with static ip addresses in this file.
|
||||
|
||||
DNSchrony uses the following perl modules. See that they are installed.
|
||||
Get them from CPAN if needed.
|
||||
|
||||
Net::DNS, Tie::Syslog, Getopt::Std, Socket, File.
|
||||
|
||||
Cause DNSchronyUPDATE bash script to run from time to time when DNS
|
||||
is working. If you have a dialup, one way to do this would be to
|
||||
modify your /etc/ppp/ip-up.local file as follows:
|
||||
|
||||
cat <<EOF | /usr/local/bin/chronyc
|
||||
password mysecret
|
||||
online
|
||||
EOF
|
||||
# update all of the dynamic servers and save the result.
|
||||
# do not wait for response
|
||||
|
||||
nohup /usr/local/bin/DNSchronyUPDATE mysecret >/dev/null 2>&1 &
|
||||
|
||||
Since this file contains the chronyc password you will want to set the
|
||||
file permissions so that just everybody will not be able to read
|
||||
it. But you already did that when you put in the chronyc command. Any
|
||||
other way to make DNSchronyUPDATE run perodicly when DNS is up will
|
||||
also work.
|
||||
|
||||
To add a server with a varying IP address one could run:
|
||||
/usr/local/bin/DNSchronyADD mysecret tock.greyware.com
|
||||
|
||||
or if you want to specify different server parameters you
|
||||
could say:
|
||||
|
||||
/usr/local/bin/DNSchronyADD mysecret tock.greyware.com "minpoll 10 maxpoll 20 maxdelay 0.8"
|
||||
|
||||
The DNSchronyADD's default for these parameters is:
|
||||
"minpoll 5 maxpoll 10 maxdelay 0.4" values that are often shown
|
||||
as examples in the chrony documentation.
|
||||
|
||||
If DNS is not running now but you know the IP address, you can say:
|
||||
/usr/local/bin/DNSchronyADD mysecret tock.greyware.com=208.14.208.44
|
||||
|
||||
Of course, the IP address will be checked next time DNSchronyUPDATE
|
||||
runs.
|
||||
|
||||
To delete dynamic DNS a server:
|
||||
/usr/local/bin/DNSchronyDELETE mysecret tock.greyware.com
|
||||
|
||||
To change parameters delete and re-add.
|
||||
|
||||
Of course, in all of the above "mysecret" is your chronyc password
|
||||
which SHOULD NOT BE "mysecret".
|
||||
----------------------------------------------
|
||||
DNSchrony.pl is covered by the GPL
|
||||
# Copyright (C) Paul Elliott 2002
|
||||
# This program is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program; if not, write to the Free Software
|
||||
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
# SEE COPYING FOR DETAILS
|
||||
|
|
@ -1,22 +0,0 @@
|
|||
#example file /etc/ppp/ip-up.local
|
||||
#originally from SuSE distribution
|
||||
#modified for chrony
|
||||
cat <<EOF | /usr/local/bin/chronyc
|
||||
password mysecret
|
||||
online
|
||||
EOF
|
||||
# update all of the dynamic servers and save the result.
|
||||
# do not wait for response
|
||||
|
||||
nohup /usr/local/bin/DNSchronyUPDATE mysecret >/dev/null 2>&1 &
|
||||
#other stuff who knows?
|
||||
|
||||
# The following lines added for Linux-HA support # Heartbeat
|
||||
DEVFILE=`echo $DEVICE | sed -e 's!^/dev/!!' -e 's!/!.!g'` # Heartbeat
|
||||
OUTFILE=/var/run/ppp.d/$DEVFILE # Heartbeat
|
||||
( # Heartbeat
|
||||
echo "$IPREMOTE" # Heartbeat
|
||||
echo "$IFNAME" # Heartbeat
|
||||
echo "$PPPD_PID" # Heartbeat
|
||||
echo "$IPLOCAL" # Heartbeat
|
||||
) > $OUTFILE # Heartbeat
|
||||
Loading…
Reference in a new issue