mirror of https://github.com/apache/cloudstack.git
118 lines
2.9 KiB
Bash
Executable File
118 lines
2.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Copyright (C) 2010 Cloud.com, Inc. All rights reserved.
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#
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# This software is licensed under the GNU General Public License v3 or later.
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#
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# It is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# edithosts.sh -- edit the dhcphosts file on the routing domain
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# $1 : the mac address
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# $2 : the associated ip address
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# $3 : the hostname
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grep "redundant_router=1" /var/cache/cloud/cmdline > /dev/null
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no_redundant=$?
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wait_for_dnsmasq () {
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local _pid=$(pidof dnsmasq)
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for i in 0 1 2 3 4 5 6 7 8 9 10
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do
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sleep 1
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_pid=$(pidof dnsmasq)
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[ "$_pid" != "" ] && break;
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done
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[ "$_pid" != "" ] && return 0;
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logger -t cloud "edithosts: timed out waiting for dnsmasq to start"
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return 1
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}
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logger -t cloud "edithosts: update $1 $2 $3 to hosts"
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[ ! -f /etc/dhcphosts.txt ] && touch /etc/dhcphosts.txt
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[ ! -f /var/lib/misc/dnsmasq.leases ] && touch /var/lib/misc/dnsmasq.leases
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#delete any previous entries from the dhcp hosts file
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sed -i /$1/d /etc/dhcphosts.txt
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sed -i /$2,/d /etc/dhcphosts.txt
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sed -i /$3,/d /etc/dhcphosts.txt
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#put in the new entry
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echo "$1,$2,$3,infinite" >>/etc/dhcphosts.txt
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#delete leases to supplied mac and ip addresses
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sed -i /$1/d /var/lib/misc/dnsmasq.leases
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sed -i /"$2 "/d /var/lib/misc/dnsmasq.leases
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sed -i /"$3 "/d /var/lib/misc/dnsmasq.leases
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#put in the new entry
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echo "0 $1 $2 $3 *" >> /var/lib/misc/dnsmasq.leases
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#edit hosts file as well
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sed -i /"$2 "/d /etc/hosts
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sed -i /"$3"/d /etc/hosts
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echo "$2 $3" >> /etc/hosts
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locked=0
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if [ $no_redundant -eq 0 ]
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then
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#for redundant router, grap the lock to prevent racy with keepalived process
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LOCK=/tmp/rrouter.lock
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# Wait the lock
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for i in `seq 1 5`
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do
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if [ ! -e $LOCK ]
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then
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touch $LOCK
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locked=1
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break
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fi
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sleep 1
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logger -t cloud "edithosts: sleep 1 second wait for the redundant router lock"
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done
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if [ $locked -eq 0 ]
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then
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logger -t cloud "edithosts: fail to get the redundant router lock"
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logger -t cloud "edithosts: keepalived should able to handle the dnsmasq restart"
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exit
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fi
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fi
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# make dnsmasq re-read files
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pid=$(pidof dnsmasq)
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if [ "$pid" != "" ]
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then
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service dnsmasq restart
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else
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if [ $no_redundant -eq 1 ]
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then
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wait_for_dnsmasq
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else
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logger -t cloud "edithosts: skip wait dnsmasq due to redundant virtual router"
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fi
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fi
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ret=$?
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if [ $locked -eq 1 ]
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then
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rm $LOCK
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fi
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exit $ret
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