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From Andrija Panic <andrija.pa...@gmail.com>
Subject Re: VPC with Private Gateway leads to MASTER/MASTER
Date Tue, 11 Jun 2019 20:56:45 GMT
Hi Richard,

can I kindly as you to open a GitHub issue, describing the problem in
detail, so someone can pick it up for the resolution - we could be able to
fix this for the 4.13, but 4.11.3 we are a bit late since it's already in
the voting process.

Thanks,
Andrija

On Tue, 11 Jun 2019 at 20:50, Richard Lawley <richard@richardlawley.com>
wrote:

> I've deployed a fairly simple VPC (one tier, one VM) with a private
> gateway, but keep getting both VRs in MASTER state.  Upon
> investigating, I can see that the reason is that keepalived is being
> configured to use the private gateway interface (eth2).  Since private
> gateway interface shares a virtual IP, both VRs send advertisements
> from the VIP and therefore both think they're Master.  The resolution
> is to make keepalived use an actual guest interface rather than a
> private gateway.
>
> I'm quite happy digging into the VR code to sort this out, but since
> this is a problem on 4.11.2 and I would've thought this is a fairly
> common scenario, I thought I'd bring it up here in case someone had
> already seen it and it wasn't as obvious as I first thought!
>
> From the VR logs it seems that it does initially get configured on
> eth3 and then again on eth2.  This happens any time update_config.py
> is called.
>
> 2019-06-11 17:58:31,671  CsRedundant.py _redundant_on:99 Wait for
> devices to be configured so we can start keepalived
> 2019-06-11 17:58:31,672  CsHelper.py execute:193 Executing: ip link
> show eth3 | grep 'state UP'
> 2019-06-11 17:58:31,675  CsRedundant.py _redundant_on:105 Device eth3
> is present, let's start keepalive now.
> 2019-06-11 17:58:31,675  CsRedundant.py _redundant_on:99 Wait for
> devices to be configured so we can start keepalived
> 2019-06-11 17:58:31,675  CsHelper.py execute:193 Executing: ip link
> show eth2 | grep 'state UP'
> 2019-06-11 17:58:31,678  CsRedundant.py _redundant_on:105 Device eth2
> is present, let's start keepalive now.
>
>
> Regards,
>
> Richard
>


-- 

Andrija Panić

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