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From "Javier Ayllon (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-9357) DHCP DNS option is incorrect for Redundant Router config
Date Tue, 18 Oct 2016 08:09:58 GMT


Javier Ayllon commented on CLOUDSTACK-9357:

Hi, I've found that even with useextdns=true the local IP is sent as a dns server.
It seems that the DNS option 6 configuration is broken.

> DHCP DNS option is incorrect for Redundant Router config
> --------------------------------------------------------
>                 Key: CLOUDSTACK-9357
>                 URL:
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: SystemVM
>    Affects Versions: 4.8.0
>            Reporter: Aaron Brady
>            Priority: Minor
> With two redundant system routers, my guests are given DNS option 6 containing the *system*
IP (not the virtual IP) of whichever router is master as their first DNS server entry.
> This means that if one router is down or stopped, DNS requests are slowed until it moves
on to the external secondaries I've supplied.
> It looks like the `cloud-early-config` script does the right thing with dnsmasq.conf,
but then the cloud.conf put in /etc/dnsmasq.d/ is incorrect.
> I've had a look through the code and that appear to be written by
> `systemvm/patches/debian/config/opt/cloud/bin/cs/`, but I've been unable to
find where it's being passed the incorrect, non-redundant, IP information.

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