Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Ryan Steele wrote:
> Well, the only problem with that script is that it isn't mounting the
> drbd device, /dev/drbd0. I assume it's supposed to, and I'm just not
> doing something correctly? As a test, I manually mounted /dev/drbd0
> on /home on machine A, created a test file, then unmounted /dev/drbd0
> on machine A and executed a 'drbdadm secondary r0'. I then went to
> machine B and made it primary and mounted /dev/drbd0 on /home there,
> but the test file I created wasn't there.
> Here's what gets me though: when I unmounted /dev/drbd0 on machine A,
> and I executed an 'ls' on /home, the test file was still there. I
> thought maybe the 'mount /dev/drbd0 /home' had silently failed, but I
> tested the same scenario again, and verified by running the 'mount'
> command that /dev/drbd0 was indeed mounted on /home. I'm a bit
> confused here... any reason why the test file wouldn't disappear when
> I unmounted /dev/drbd0 on machine A? I have a feeling when I get that
> figured out, I'll see the file on machine B when I mount it there...
>
> Any suggestions are welcome, and here is some output that might help:
>
>
> db1:/# cat /etc/drbd.conf
> resource r0 {
> protocol C;
> incon-degr-cmd "echo '!DRBD! pri on incon-degr' | wall ; sleep 60 ;
> halt -f";
> startup { wfc-timeout 0; degr-wfc-timeout 120; }
> disk { on-io-error detach; }
> syncer {
> rate 60M;
> group 1; # sync when r2 is finished syncing.
> }
> on db1 {
> device /dev/drbd0;
> disk /dev/md7;
> address 192.168.101.26:7791;
> meta-disk /dev/md1 [0];
> }
> on db2 {
> device /dev/drbd0;
> disk /dev/md7;
> address 192.168.101.27:7791;
> meta-disk /dev/md1 [0];
> }
> }
>
Sorry, I that output of 'cat /proc/drbd' was wrong. Here is the correct
information:
db1:/# cat /proc/drbd
version: 0.7.24 (api:79/proto:74)
SVN Revision: 2875 build by root at abbott, 2007-06-07 13:40:33
0: cs:Connected st:Secondary/Primary ld:Consistent
ns:208540112 nr:92 dw:748 dr:208556828 al:4 bm:38195 lo:0 pe:0 ua:0 ap:0
1: cs:Unconfigured
db2:/# cat /proc/drbd
version: 0.7.24 (api:79/proto:74)
SVN Revision: 2875 build by root at abbott, 2007-06-07 13:40:33
0: cs:Connected st:Primary/Secondary ld:Consistent
ns:92 nr:208540048 dw:208540140 dr:6460 al:2 bm:38189 lo:0 pe:0 ua:0
ap:0
1: cs:Unconfigured
>
>
>
> Best Regards,
> Ryan
>
> Ben wrote:
>> Heartbeat comes with a nice script to make this easy:
>>
>> /etc/ha.d/resource.d/drbddisk < drbd resource > < start | stop >
>>
>> You can use this even if Heartbeat isn't running, and it's the script
>> Heartbeat will use, so if you're testing to make sure Heartbeat will
>> work, I recommend using it to test. If you want to be gentle, stop
>> the resource on the first node and then start it on the second. If
>> you want to be more paranoid, pull the plug on the first node instead
>> of stopping the resource, and verify everything is still correct.
>>
>> On Jun 12, 2007, at 11:33 AM, Ryan Steele wrote:
>>
>>> Hey folks,
>>>
>>> Before I get Heartbeat into the mix, I want to verify DRBD is
>>> working properly in my setup. I have DRBD running on both boxes,
>>> and have done a --do-what-I-say primary all on the first machine. I
>>> then mounted /dev/drbd0 on /home on the first machine and put a
>>> little test file there.
>>>
>>> Now, I want to verify that I can mount /dev/drbd0 on /home on the
>>> second machine and see the little test file there. What is the best
>>> way to go about doing so? Thanks for any advice.
>>>
>>> By the way, /proc/drbd says things are consistent, so I think as
>>> long as I can verify what I said above, I should be ready to
>>> introduce Heartbeat. Thanks again!
>>>
>>> Best Regards,
>>> Ryan
>>>
>>> _______________________________________________
>>> drbd-user mailing list
>>> drbd-user at lists.linbit.com
>>> http://lists.linbit.com/mailman/listinfo/drbd-user
>>
>
> _______________________________________________
> drbd-user mailing list
> drbd-user at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-user
--
Ryan Steele
Systems Administrator steele at agora-net.com
AgoraNet, Inc. (302) 224-2475
314 E. Main Street, Suite 1 (302) 224-2552 (fax)
Newark, DE 19711 http://www.agora-net.com