Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Rafał Kupka schrieb:
>> Unfortunately, it fails:
>>
>> # fdisk /dev/drbd1
>>
>> Unable to open /dev/drbd1
>
>> What am I doing wrong?
>
> Make sure that resource r0 is in primary state on that node.
Indeed it was the case:
primary_machine# cat /proc/drbd
version: 8.2.1 (api:86/proto:86-87)
GIT-hash: 318925802fc2638479ad090b73d7af45503dd184 build by root at san2,
2007-12-17 13:43:47
1: cs:SyncSource st:Secondary/Secondary ds:UpToDate/Inconsistent C r---
ns:11704 nr:0 dw:0 dr:19264 al:0 bm:0 lo:0 pe:5 ua:237 ap:0
[>...................] sync'ed: 0.8% (1536652/1548204)K
finish: 0:28:27 speed: 856 (824) K/sec
resync: used:2/31 hits:961 misses:2 starving:0 dirty:0 changed:2
act_log: used:0/127 hits:0 misses:0 starving:0 dirty:0 changed:0
An obvious question would be: why does it sync if both machines are
secondary?
Let's make it primary:
primary_machine# drbdadm -- --overwrite-data-of-peer primary all
Child process does not terminate!
Exiting.
So, something was not very happy, but looks like it succeeded:
primary_machine# cat /proc/drbd
version: 8.2.1 (api:86/proto:86-87)
GIT-hash: 318925802fc2638479ad090b73d7af45503dd184 build by root at san2,
2007-12-17 13:43:47
1: cs:SyncSource st:Primary/Secondary ds:UpToDate/Inconsistent C r---
ns:42288 nr:0 dw:0 dr:49824 al:0 bm:2 lo:0 pe:6 ua:236 ap:0
[>...................] sync'ed: 3.0% (1506092/1548204)K
finish: 0:15:41 speed: 1,344 (824) K/sec
resync: used:2/31 hits:2869 misses:4 starving:0 dirty:0 changed:4
act_log: used:0/127 hits:0 misses:0 starving:0 dirty:0 changed:0
Let's now try to see what happens if we reboot drbd on the primary machine:
# /etc/init.d/drbd stop
Stopping all DRBD resources.
# /etc/init.d/drbd start
Starting DRBD resources: [ d0 s0 n0 ].
Ouch - primary is gone! Why? Do I have to set up the primary each time
after drbd starts?
# cat /proc/drbd
version: 8.2.1 (api:86/proto:86-87)
GIT-hash: 318925802fc2638479ad090b73d7af45503dd184 build by root at san2,
2007-12-17 13:43:47
1: cs:SyncSource st:Secondary/Secondary ds:UpToDate/Inconsistent C r---
ns:27588 nr:0 dw:0 dr:35104 al:0 bm:1 lo:0 pe:6 ua:235 ap:0
[>...................] sync'ed: 2.0% (1438860/1466284)K
finish: 0:22:28 speed: 980 (828) K/sec
resync: used:2/31 hits:1951 misses:3 starving:0 dirty:0 changed:3
act_log: used:0/127 hits:0 misses:0 starving:0 dirty:0 changed:0
--
Tomasz Chmielewski
http://wpkg.org