[DRBD-user] First timer

Lars Ellenberg lars.ellenberg at linbit.com
Tue Nov 18 13:56:15 CET 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


On Tue, Nov 18, 2008 at 12:04:24PM +0100, David Hoskinson wrote:
> I am testing a replicated mail server system for use in our group.  I have
> two boxes with identical 20 GB partions on /dev/mapper/VolGroup01-LogVol00
> on each machine.  I have configured heartbeat and drbd to sync these
> partitions.  When I shut down the primary machine, I am able to promote the
> secondary machine to primary and mount /mnt/drbd and the folder has the
> correct files in it, however it will not automatically promote itself.
> 
> Its my understanding from my reading that that software should switch
> machines and roles automatically, is this correct?

you do realize that you have to configure "resources"?

for "v1-style" heartbeat, that is in haresources.

for "v2-style" crm, or pacemaker,
it is probably best done via the heartbeat gui,
unless you feel comfortable typing xml in a terminal window.

> 
> Here is my ha.cf file:
> 
> crm on

you want crm ("v2-style")
good.
did you configure resources, constraints, etc?

> debugfile /var/log/ha-debug
> logfile /var/log/ha-log
> logfacility local0
> keepalive 2
> deadtime 30
> deadping 40
> warntime 10
> initdead 60
> autojoin none

are you sure about that autojoin none?

> bcast eth0
> auto_failback on

I don't like auto failback.
besides, the directive does nothing in crm mode, afaik.
have a look at "default resource stickiness" and so on in
the crm config ("cib", cluster information base).

> node mail.eng.uiowa.edu mail2.eng.uiowa.edu
> respawn root /usr/lib/heartbeat/pingd -m 100 -d 5s -a default_ping_set
> 
> And my drbd.conf file:
> 
> resource r0 {
>         # Specify A or B or C
>         protocol C;
>         syncer {
>                 # baud width

no. not baud width.
but throttle for background resync in _byte_ per second.

>                 rate 300M;

did you have a look at the users guide?
http://www.drbd.org/users-guide/s-configure-syncer-rate.html#s-configure-syncer-rate-permanent

hope those keywords help you getting started.

-- 
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
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