--------------------
Check the version of dopd and drbd-peer-outdater on node1
---------------------------------------------------------
debnode1:~# lsof /usr/lib/heartbeat/dopd
COMMAND  PID      USER  FD   TYPE DEVICE  SIZE   NODE NAME
dopd    2778 hacluster txt    REG  254,0 12744 676612 /usr/lib/heartbeat/dopd
debnode1:~# md5sum /usr/lib/heartbeat/dopd
9ce67567ea50157bfd2f0e3f3623010d  /usr/lib/heartbeat/dopd
debnode1:~# lsof /usr/lib/heartbeat/drbd-peer-outdater
debnode1:~# md5sum /usr/lib/heartbeat/drbd-peer-outdater
b195f526bb6fa3659f4c63e8f23b1d99  /usr/lib/heartbeat/drbd-peer-outdater

debnode1:/usr/lib/heartbeat# md5sum --check < MD5SUM
dopd: OK
drbd-peer-outdater: OK
dopd.bz2: OK
drbd-peer-outdater.bz2: OK


Check the version of dopd and drbd-peer-outdater on node2
---------------------------------------------------------

debnode2:~# lsof /usr/lib/heartbeat/dopd
COMMAND  PID      USER  FD   TYPE DEVICE  SIZE   NODE NAME
dopd    2811 hacluster txt    REG  254,0 12744 676602 /usr/lib/heartbeat/dopd
debnode2:~#  md5sum /usr/lib/heartbeat/dopd
9ce67567ea50157bfd2f0e3f3623010d  /usr/lib/heartbeat/dopd
debnode2:~# lsof /usr/lib/heartbeat/drbd-peer-outdater
debnode2:~#  md5sum /usr/lib/heartbeat/drbd-peer-outdater
b195f526bb6fa3659f4c63e8f23b1d99  /usr/lib/heartbeat/drbd-peer-outdater


debnode2:/usr/lib/heartbeat# md5sum --check < MD5SUM
dopd: OK
drbd-peer-outdater: OK
dopd.bz2: OK
drbd-peer-outdater.bz2: OK

Now test the failover with heartbeat
------------------------------------
debnode1:/usr/lib/heartbeat# cat /proc/drbd
version: 8.2.6 (api:88/proto:86-88)
GIT-hash: 3e69822d3bb4920a8c1bfdf7d647169eba7d2eb4 build by root@debnode1, 2008-07-14 18:11:00
 0: cs:Connected st:Primary/Secondary ds:UpToDate/UpToDate C r---
    ns:4 nr:4 dw:8 dr:17 al:1 bm:1 lo:0 pe:0 ua:0 ap:0 oos:0

...power off debnode1 
.. failover faield with loooping:

Aug 18 11:26:57 debnode2 drbd-peer-outdater: [3216]: debug: message: outdater_rc, debnode2
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: WARN: Cluster node: debnode1: status: dead
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: Processed 1 messages
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: invoked: outdater
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: Processed 0 messages
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: destroying connection: (null)
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: Deleting outdater (0x805fe50) from mainloop
Aug 18 11:26:57 debnode2 drbd-peer-outdater: [3219]: debug: drbd peer: debnode1
Aug 18 11:26:57 debnode2 drbd-peer-outdater: [3219]: debug: drbd resource: db
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: Connecting channel
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: Client outdater (0x805fe50) connected
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: invoked: outdater
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: Processing msg from outdater
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: Got message from (drbd-peer-outdater). (peer: debnode1, res :db)
Aug 18 11:26:57 debnode2 /usr/lib/heartbeat/dopd: [2811]: debug: Starting node walk

.. try manually

debnode2:/usr/lib/heartbeat# drbdadm primary all
/dev/drbd0: State change failed: (-7) Refusing to be Primary while peer is not outdated
Command 'drbdsetup /dev/drbd0 primary' terminated with exit code 11
command exited with code 11
	
... replace dopd and drbd-peer-outdater with the self compiled one and try again

debnode2:/usr/lib/heartbeat# mv drbd-peer-outdater drbd-peer-outdater.NOT_WORKING
debnode2:/usr/lib/heartbeat# mv dopd dopd.NOT_WORKING
debnode2:/usr/lib/heartbeat# cp -a dopd.WORKING dopd
debnode2:/usr/lib/heartbeat# cp -a drbd-peer-outdater.WORKING drbd-peer-outdater
debnode2:/usr/lib/heartbeat# md5sum --check < MD5SUM
dopd: FEHLSCHLAG
drbd-peer-outdater: FEHLSCHLAG
dopd.bz2: OK
drbd-peer-outdater.bz2: OK
md5sum: Warnung: 2 von 4 berechneten Prüfsumme passten NICHT

debnode2:/usr/lib/heartbeat# md5sum dopd
a91706c8c86cf3fdf3c83c0104862258  dopd
debnode2:/usr/lib/heartbeat# md5sum drbd-peer-outdater
1fd162acce837e1a1f9f88718b065295  drbd-peer-outdater


debnode2:/usr/lib/heartbeat# killall dopd
debnode2:/usr/lib/heartbeat# cat /proc/drbd
version: 8.2.6 (api:88/proto:86-88)
GIT-hash: 3e69822d3bb4920a8c1bfdf7d647169eba7d2eb4 build by root@debnode1, 2008-07-14 18:11:00
 0: cs:WFConnection st:Secondary/Unknown ds:UpToDate/DUnknown C r---
    ns:4 nr:4 dw:4 dr:4 al:0 bm:1 lo:0 pe:0 ua:0 ap:0 oos:0
	
... try again

debnode2:/usr/lib/heartbeat# drbdadm primary all
debnode2:/usr/lib/heartbeat# cat /proc/drbd
version: 8.2.6 (api:88/proto:86-88)
GIT-hash: 3e69822d3bb4920a8c1bfdf7d647169eba7d2eb4 build by root@debnode1, 2008-07-14 18:11:00
 0: cs:WFConnection st:Primary/Unknown ds:UpToDate/Outdated C r---
    ns:4 nr:4 dw:4 dr:4 al:0 bm:1 lo:0 pe:0 ua:0 ap:0 oos:0

--------------