[Linux-HA] Shared configration files using DRBD

[Rois Cannon]

I don't know about all services but that's how I'm handling Samba.  I'm
sure each of them has a tweak to making them work they way you want.  I
haven't put mine in production yet (and someone may say I'm missing
something) but I made sure Samba was binding to the VIP and only
advertising the VIP name, not the local machine names.

smb.conf issues for me:
-----------------------------------
netbios name = "svr90"
server string = "svr90"
interfaces = "192.168.151.90/24"
bind interfaces only = yes
-----------------------------------

192.168.151.91	svr91 (node1)
192.168.151.92	svr92 (node2)
192.168.151.90	svr90 (Virtual Address/Server)

I don't want the windows clients to be aware of svr91 or svr92.  ONLY
svr90.

I noticed you put the cache on drbd. I hadn't read about that.  Is that
really possible?

Rois


On Wed, 2008-01-02 at 16:12 +0200, Chris Picton wrote:
> Hi
> 
> I have been investigating heartbeat + drbd for high availability
> servers, and have the following question:
> 
> Are there any potential downfalls from sharing service configuration
> files between machines, by placing the configs on the shared drbd disk?
> 
> My config has /srv as the drbd (active-passive) mount point, and I am
> failing over the samba service.
> 
> I have created /srv/samba/etc and /srv/samba/cache.
> I symlinked /etc/samba to /srv/samba/etc
> I symlinked /var/cache/samba to /srv/samba/cache
> 
> This ensures that runtime configuration, and config files are always in
> sync between the two.
> 
> Are there any problems from treating all services like this -
> (postfix/dovecot/ftp/etc), as long as I dont try share data which is
> specific to each machine?
> 
> Chris
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