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From "Alena Prokharchyk (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-1771) IPv6 - Network restart for a dual network , results in the ipv4 address of the router to be changed. After netwpork restart , name resolution of the Vms fail.
Date Mon, 25 Mar 2013 23:47:14 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-1771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13613309#comment-13613309
] 

Alena Prokharchyk commented on CLOUDSTACK-1771:
-----------------------------------------------

The reason this bug was never caught before - we never allowed VR destroy and networkRestart
with cleanup=true for Shared networks. Then somebody added support for that, but never assumed
that on each VR recreation, it gets a new ip address, and all the user vms in the network
won't be able to send DHCP requests to the VR.

The fix I'm putting in, will ensure that the IP address assigned to the very first VR instance
in the Shared network, will remain with this network for its entire lifecycle, and will be
re-used by all the VRs ever recreated in the network. This is a big change for Shared network,
will involve the DB upgrade as well. I'll update the bug with instructions for QA once the
fix is committed.
                
> IPv6 - Network restart for a dual network , results in the ipv4 address of the router
to be changed. After netwpork restart , name resolution of the Vms fail. 
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-1771
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-1771
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: Management Server
>    Affects Versions: 4.1.0
>         Environment: Build from 4.1
>            Reporter: Sangeetha Hariharan
>            Assignee: Alena Prokharchyk
>             Fix For: 4.1.0
>
>
> IPv6 - Network restart for a dual network , results in the ipv4 address of the router
to be changed. After netwpork restart , name resolution of the Vms fail
> Steps to reproduce the problem:
> Pre Req:
> 1.Create Dual Stack Shared Network by passing ipv6 params and ipv4 params
> 2. Deploy few Vms in this network.
> Steps:
> 1. Restart Network.
> Expected Behavior:
> After network restart , we should be able to access all the Vms within the network using
its name.
> Actual Result:
> After network restart , we are not able to access all the Vms within the network using
its name.
> This is because of the  ipv4 address of the router being changed after network restart.

> Router had ip address - 10.223.136.69
> After reboot , Router now has ip address - 10.223.136.69
> But the guest Vms still point to the routers old ipaddress - 10.223.136.69 for providing
name resolution.
> sangeetha@test123:~$ cat /etc/resolv.conf
> # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
> #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
> nameserver 10.223.136.69
> nameserver 72.52.126.11
> nameserver 72.52.126.12
> search hello1361

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