PCS, Corosync, Pacemaker, and Bind

Lightner, Jeff JLightner at dsservices.com
Wed Mar 16 12:48:57 UTC 2016

You might want to try "ip a" vs ifconfig.   RHEL7 uses Network Manager and in the past I've found some things don't show up in ifconfig output when doing alias/virtual interfaces.  

Usually even when other products (e.g. Oracle RAC/GRID) create virtual interfaces they still show up as valid interfaces at host level.   I've not tried PCS/Corosync.

You might also look at arp output to see if it shows any traffic on a specific MAC.

-----Original Message-----
From: bind-users-bounces at lists.isc.org [mailto:bind-users-bounces at lists.isc.org] On Behalf Of Phil Mayers
Sent: Wednesday, March 16, 2016 5:14 AM
To: bind-users at lists.isc.org
Subject: Re: PCS, Corosync, Pacemaker, and Bind

On 15/03/16 23:06, Mike Bernhardt wrote:

> So, I'm hoping that either
> 1) There is a way to tell BIND to use an IP address that is not on an 
> interface, or

I don't think there is.

I can think of all kinds of horrible workarounds - iptables SNAT, shell script doing a config-change & rndc reconfig on pcs failover.

But in general I'd agree with what Tony Finch said - give some thought to why you're caring about these source IPs.

TBH having used pcs/corosync I'm really curious what your use-case is. 
It seems massive overkill for having highly-available DNS.
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