15 Dec
2021
15 Dec
'21
5:59 a.m.
Hi Guys,
That's awesome - thanks to you both for the suggestions. I had overlooked anycast
because my Ips are only active on one box at a time, but it makes sense that I'm
basically dealing with the same challenges as an anycast setup, thanks Igor.
And thanks Arnd! This is what I was thinking of as a quick fix, but I couldn't find
anything useful to change via RPC commands. A shared variable makes perfect sense!
I will work through these ideas and post back with whatever I manage to come up with.
Thanks!
Rhys.
On 15/12/21, 12:19 am, "sr-users on behalf of Arnd Schmitter"
<sr-users-bounces(a)lists.kamailio.org on behalf of aschmitter(a)megasat.de> wrote:
Hello Rhys,
For a quick solution, to can use notify scripts in keepalived which will alter a
shared variable via RPC call. Then you can test the content of this variable to see if
this instance is master or not.
Regards,
Arnd
Am Di, Dez 14, 2021 um 14:03:27 schrieb Igor Olhovskiy:
Rhys,
Seems you're looking into something called "anycast". If it's the case,
have
you checked
https://github.com/kamailio/kamailio/blob/master/misc/examples/mixed/kamail…
?
But overall you are correct, myself is not enough clever to get if interface
is active or not.
Regards,
Igor
On 14.12.2021 05:50, Rhys Hanrahan wrote:
>
> Hi Everyone,
>
> I have Kamailio acting as a registrar, using DMQ to replicate usrloc
> between nodes. I’m relaying INVITEs to the home registrar, but skipping
> this if (uri == myself) is true.
>
> In my lab I just setup my SBCs in an active/active mode, similar to the
> link below. So I have 2x VIPs and both SBCs listen on both, but the
> first VIP is only master on SBC01 and the second VIP is only master on
> SBC02.
>
> https://docs.nginx.com/nginx/admin-guide/high-availability/ha-keepalived-no…
<https://docs.nginx.com/nginx/admin-guide/high-availability/ha-keepalived-nodes/>
>
>
> My issue is that now “myself” will always return true even if the
> virtual IP is actually not active on this node at the moment, so the
> invite is never relayed properly if it’s on another node. I guess
> “myself” is just blindly looking at the list of Ips that are configured
> with either listen= or alias= and doesn’t care if the IP actually exists
> on the server at the time, or not?
>
> I am thinking I may have to ditch relying on “myself” entirely and come
> up with some other way of checking for local requests, but I am
> wondering if there’s a good way of approaching this? I was thinking of
> perhaps triggering an add/remove of listen directives (or something)
> when a failover of a VIP happens, though this seems kind of heavy
> handed. Hoping there is a better way.
>
> Has anyone else tried doing active/active Kamailio instances like this?
>
> Thanks!
>
>
> *Rhys Hanrahan* | Chief Information Officer
> *e:* rhys(a)nexusone.com.au <mailto:rhys@nexusone.com.au>
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