[DRBD-user] CVS repository replication with DRBD

[Todd Denniston]

> Hi
> 
> I am using DRBD on SLES9 to replicate the CVSNT repository . It is working
> fine , but i have some questions on DRBD .
> 
> -- Although i am using DRBD , i want to take the daily backup of  data to a
> tape drive . I want to take the backup from the secondary DRBD machine only
> (every day) . Is this is possible ?   . I know that , we can't mount the
> secondary machine's DRBD partition onto the filesystem . I am not interested
> to Chane the secondary to primary on every day for backup purpose .
> 

This has been discussed many times on the list, you should only try to back
up from the machine that is in drbd primary state.

> -- If i am using DRBD with Linux HA (heartbeat) , if the primary DRBD node
> goes down , the secondary DRBD node automatically changes to primary ?  ( I
> don't want to manually execute the commands to change from secondary to
> primary ) .
> 
Take a look at this thread I started on the cvs list.
"cvs as a heartbeat client (questions)"
http://lists.gnu.org/archive/html/info-cvs/2004-03/msg00182.html

basic summary:
to stop:
1) we need to stop new cvs connections from being established
	pserver -> mod [x]inetd configs to disable connections 
		restart [x]inetd for changes to take place.
	rsh -> mod [x]inetd configs to disable connections 
		restart [x]inetd for changes to take place.
	ssh -> stop sshd
	rsh and ssh could also be stopped with  /etc/nologin.

2) to bring any running cvs's down gracefully 
killall -q -SIGTERM cvs
give it a little time then beat any left into submission with
killall -q -9 cvs

to start:
reverse what you did in 1 for stop.

for status:
report the state of the control method (i.e. have you modified the files to
stop or allow run?)

> Please anyone answer to my questions . Thank you.

Sorry, I have not yet gotten permission to release the cvs_ha script I
wrote.

-- 
Todd Denniston
Crane Division, Naval Surface Warfare Center (NSWC Crane) 
Harnessing the Power of Technology for the Warfighter