Sanjeev N created CLOUDSTACK-2620:
-------------------------------------
Summary: [Multiple_IP_Ranges] Guest vm's nameserver is not set to
VRs guest IP address in case of multiple subnets
Key: CLOUDSTACK-2620
URL: https://issues.apache.org/jira/browse/CLOUDSTACK-2620
Project: CloudStack
Issue Type: Bug
Security Level: Public (Anyone can view this level - this is the default.)
Components: Management Server
Affects Versions: 4.2.0
Environment: Build from master branch:
CloudStack-non-OSS-MASTER-394-rhel6.3.tar.gz
Reporter: Sanjeev N
Priority: Critical
Fix For: 4.2.0
[Multiple_IP_Ranges] Guest vm's nameserver is not set to VRs guest IP address
in case of multiple subnets
Steps to Reproduce:
================
1.Bring up CS in basic zone with Xen61 server
2.Consume all the guest IP ranges in the existing subnet
3.Add guest ip range in new CIDR
4.Deploy guest vm
5.Verify the nameserver in /etc/resolve.conf in guest vm
Expected Behaviour:
=================
nameserver on guest vm should be set to ip alias address on VR
Actual Behaviour:
==============
nameserver on guest vm was set to zone level internal DNS ip address instead of
VR's ip alias address.
Observations:
===========
Primary ip range: 10.147.43.3-10.147.43.7 GW:10.147.43.1 Netmask:
255.255.255.128
New IP Range : 10.147.43.130-10.147.43.133 GW: 10.147.43.129 Netmask:
255.255.255.192
When the vm is deployed with IP address from the new CIDR , ip alis on VR got
created with ip address from new CIDR.
ip alias on the VR was set to 10.147.43.132
root@r-4-VM:/etc# ifconfig
eth0 Link encap:Ethernet HWaddr 06:ba:90:00:00:0e
inet addr:10.147.43.6 Bcast:10.147.43.127 Mask:255.255.255.128
inet6 addr: fe80::4ba:90ff:fe00:e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:36018 errors:0 dropped:0 overruns:0 frame:0
TX packets:1007 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1919944 (1.8 MiB) TX bytes:46214 (45.1 KiB)
Interrupt:24
eth0:18 Link encap:Ethernet HWaddr 06:ba:90:00:00:0e
inet addr:10.147.43.132 Bcast:10.147.43.191 Mask:255.255.255.192
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:24
During ip alias creation process dnsmasq.conf was re-generated with new ip
range and dhcp-option was set as following:
dhcp-option=6,10.103.128.16,10.103.128.16
dnsmasq.conf regeneration process is taking DNS values set at zone level and
replacing with the exiting values in the file. Hence guest vms are getting
internal DNS ip address as nemeserver.
Impact:
======
Since guest vms nameserver is set to an IP address other than VR's , vm to vm
communication using domain names will fail.
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