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aae393dcd5
When adding a VM, it adds an entry to /etc/hosts file on the VR but does not clear up any older entries for the VM with a same name. The fix uncomments the command that removes any old entries in the VM. Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com> (cherry picked from commit 63298d9b742811919717ffd6303c8a2e9d37a3dd) Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
231 lines
5.4 KiB
Bash
Executable File
231 lines
5.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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# edithosts.sh -- edit the dhcphosts file on the routing domain
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usage() {
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printf "Usage: %s: -m <MAC address> -4 <IPv4 address> -6 <IPv6 address> -h <hostname> -d <default router> -n <name server address> -s <Routes> -u <DUID> [-N]\n" $(basename $0) >&2
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}
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mac=
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ipv4=
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ipv6=
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host=
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dflt=
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dns=
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routes=
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duid=
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nondefault=
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while getopts 'm:4:h:d:n:s:6:u:N' OPTION
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do
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case $OPTION in
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m) mac="$OPTARG"
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;;
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4) ipv4="$OPTARG"
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;;
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6) ipv6="$OPTARG"
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;;
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u) duid="$OPTARG"
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;;
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h) host="$OPTARG"
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;;
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d) dflt="$OPTARG"
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;;
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n) dns="$OPTARG"
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;;
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s) routes="$OPTARG"
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;;
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N) nondefault=1
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;;
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?) usage
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exit 2
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;;
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esac
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done
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DHCP_HOSTS=/etc/dhcphosts.txt
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DHCP_OPTS=/etc/dhcpopts.txt
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DHCP_LEASES=/var/lib/misc/dnsmasq.leases
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HOSTS=/etc/hosts
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source /root/func.sh
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lock="biglock"
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#default timeout value is 30 mins as DhcpEntryCommand is not synchronized on agent side any more,
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#and multiple commands can be sent to the same VR at a time
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locked=$(getLockFile $lock 1800)
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if [ "$locked" != "1" ]
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then
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exit 1
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fi
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grep "redundant_router=1" /var/cache/cloud/cmdline > /dev/null
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no_redundant=$?
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dnsmasq_managed_lease=`cat /var/cache/cloud/dnsmasq_managed_lease`
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wait_for_dnsmasq () {
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local _pid=$(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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if [ $dnsmasq_managed_lease ]
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then
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#release previous dhcp lease if present
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logger -t cloud "edithosts: releasing $ipv4"
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dhcp_release $(ip route get "$ipv4/32" | grep " dev " | sed -e "s/^.* dev \([^ ]*\) .*$/\1/g") $ipv4 $(grep "$ipv4 " $DHCP_LEASES | awk '{print $2}') > /dev/null 2>&1
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logger -t cloud "edithosts: released $ipv4"
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fi
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logger -t cloud "edithosts: update $mac $ipv4 $ipv6 $host to hosts"
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[ ! -f $DHCP_HOSTS ] && touch $DHCP_HOSTS
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[ ! -f $DHCP_OPTS ] && touch $DHCP_OPTS
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[ ! -f $DHCP_LEASES ] && touch $DHCP_LEASES
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#delete any previous entries from the dhcp hosts file
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sed -i /$mac/d $DHCP_HOSTS
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if [ $ipv4 ]
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then
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sed -i /$ipv4,/d $DHCP_HOSTS
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fi
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if [ $ipv6 ]
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then
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#searching with [$ipv6], matching other ip so using $ipv6],
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sed -i /$ipv6],/d $DHCP_HOSTS
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fi
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# don't want to do this in the future, we can have same VM with multiple nics/entries
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sed -i /$host,/d $DHCP_HOSTS
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#put in the new entry
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if [ $ipv4 ]
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then
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echo "$mac,$ipv4,$host,infinite" >>$DHCP_HOSTS
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fi
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if [ $ipv6 ]
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then
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if [ $nondefault ]
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then
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echo "id:$duid,set:nondefault6,[$ipv6],$host,infinite" >>$DHCP_HOSTS
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else
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echo "id:$duid,[$ipv6],$host,infinite" >>$DHCP_HOSTS
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fi
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fi
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if [ $dnsmasq_managed_lease -eq 0 ]
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then
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#delete leases to supplied mac and ip addresses
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if [ $ipv4 ]
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then
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sed -i /$mac/d $DHCP_LEASES
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sed -i /"$ipv4 "/d $DHCP_LEASES
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fi
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if [ $ipv6 ]
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then
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sed -i /$duid/d $DHCP_LEASES
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sed -i /"$ipv6 "/d $DHCP_LEASES
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fi
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sed -i /"$host "/d $DHCP_LEASES
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#put in the new entry
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if [ $ipv4 ]
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then
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echo "0 $mac $ipv4 $host *" >> $DHCP_LEASES
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fi
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if [ $ipv6 ]
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then
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echo "0 $duid $ipv6 $host *" >> $DHCP_LEASES
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fi
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fi
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#edit hosts file as well
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if [ $ipv4 ]
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then
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sed -i /"$ipv4 "/d $HOSTS
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fi
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if [ $ipv6 ]
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then
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sed -i /"$ipv6 "/d $HOSTS
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fi
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sed -i /" $host$"/d $HOSTS
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if [ $ipv4 ]
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then
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echo "$ipv4 $host" >> $HOSTS
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fi
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if [ $ipv6 ]
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then
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echo "$ipv6 $host" >> $HOSTS
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fi
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if [ "$dflt" != "" -a "$ipv4" != "" ]
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then
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#make sure dnsmasq looks into options file
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sed -i /dhcp-optsfile/d /etc/dnsmasq.conf
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echo "dhcp-optsfile=$DHCP_OPTS" >> /etc/dnsmasq.conf
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tag=$(echo $ipv4 | tr '.' '_')
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sed -i /$tag,/d $DHCP_OPTS
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if [ "$dflt" == "0.0.0.0" ]
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then
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logger -t cloud "$0: unset default router for $ipv4"
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logger -t cloud "$0: unset dns server for $ipv4"
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echo "$tag,3" >> $DHCP_OPTS
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echo "$tag,6" >> $DHCP_OPTS
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echo "$tag,15" >> $DHCP_OPTS
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fi
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[ "$routes" != "" ] && echo "$tag,121,$routes" >> $DHCP_OPTS
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#delete entry we just put in because we need a tag
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sed -i /$ipv4,/d $DHCP_HOSTS
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#put it back with a tag
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echo "$mac,set:$tag,$ipv4,$host,infinite" >>$DHCP_HOSTS
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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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# use SIGHUP to avoid service outage if dhcp_release is available.
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if [ $dnsmasq_managed_lease ]
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then
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kill -HUP $pid
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else
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service dnsmasq restart
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fi
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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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unlock_exit $ret $lock $locked
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