[OpenSIPS-Users] opensips - graceful maintenance mode?

[Liviu Chircu]

On 21.01.2020 13:06, solarmon wrote:
> Thanks for the tip about the $shv global variables. The link you gave 
> is for 3.1.x, I found the equivalent for 2.4.x which is the version 
> I'm currently using. Is the 'drain' feature also included in this 
> 2.4.x implementation?
The shared variables ($shv) support has stayed the same throughout the 
years.  And the "drain"
feature is something that each script writer can build for themselves, 
there is no ready-made solution.
>
> Do you have any specific examples of how to do this 'drain' mode?
A possible way to do it (adjust as per your platform):

...
loadmodule "cfgutils.so"
modparam("cfgutils", "shvset", "drain_mode=i:0")
...

route {
   if (!has_totag() && $shv(drain_mode)) {
       append_hf("Retry-After: 60 (Server Restarting)\r\n");
       send_reply(503, "Maintenance");
       exit;
   }
}
>
> When I try the 'opensipsctl fifo shv_get debug' on my opensips server 
> I get the following error:
>
> 500 command 'shv_get' not available
>
> I assume I need to have the 'cfgutils' module enabled and loaded for 
> it to work?

Exactly.  See my above example of defining $shv variables.

Best regards,

-- 
Liviu Chircu
www.twitter.com/liviuchircu | www.opensips-solutions.com

OpenSIPS Summit, Amsterdam, May 2020
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OpenSIPS Bootcamp, Miami, March 2020
   www.opensips.org/training

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