[Gluster-devel] HA, GlusterFS server protocol and LDirectorD

[Majied Najjar]

Hi,


This is just my two cents. :-)


Instead of LDirectorD, I would recommend just using Heartbeat.


With Heartbeat, the only thing required would be a "failover IP" handled 
between the two Heartbeat servers running the glusterfsd process using 
AFR.  When a glusterfsd server running Heartbeat goes down, the other 
Heartbeat server would take over the failover IP and continue service to 
the glusterfs clients.


Granted, this isn't loadbalancing between glusterfsd servers and only 
handles failover....


Majied Najjar


 Geoff Kassel wrote:

> Hi all,
>    I'm trying to set up LDirectorD (through Heartbeat) to load-balance and 
> failover client connections to GlusterFS server instances over TCP.
>
>    First of all, I'm curious to find out if anyone else has attempted this, as 
> I've had no luck with maintaining client continuity with round-robin DNS 
> in /etc/hosts and client timeouts, as advised in previous posts and 
> tutorials. The clients just go dead with 'Transport endpoint is not 
> connected' messages.
>
>    My main problem is that LDirectorD doesn't seem to recognize that a 
> GlusterFS server is functional through the connection test method, so I can't 
> detect if a server goes down. While LDirectorD does a request-response method 
> of liveness detection, the GlusterFS protocol is unfortunately too lengthy to 
> use in the configuration files. (It needs to be a request that can fit on a 
> single line, it seems.)
>
>    I'm wondering if there's a simple request-response connection test I 
> haven't found yet that I can use to check for liveness of a server over TCP. 
> If there isn't... could I make a feature request for such? Anything that can 
> be done manually over a telnet connection to the port would be perfect.
>
>    Thank you for GlusterFS, and thanks in advance for your time and effort in 
> answering my question.
>
> Kind regards,
>
> Geoff Kassel.
>
>
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