Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
This is *really* weird:
I have two machines in a RedHat cluster sync'd with drbd. They're almost
identical, have the same version of drbd, kernel and config file, and one
of them starts drbd's service just fine, but the other one complains
thusly:
==8<---
[root at mac2 ~]# service drbd start
Starting DRBD resources: [ d(pg1) 1 is not a block device!
[pg1] cmd /sbin/drbdsetup 1 disk /dev/Data/pgdrbd1 /dev/Data/pgdrbd1
internal --set-defaults --create-device --on-io-error=detach failed -
continuing!
s(pg1) 1 is not a block device!
[pg1] cmd /sbin/drbdsetup 1 syncer --set-defaults --create-device --
verify-alg=md5 --rate=100M failed - continuing!
n(pg1) 1 is not a block device!
[pg1] cmd /sbin/drbdsetup 1 net 172.21.5.17:7789 172.21.5.44:7789 C --set-
defaults --create-device --shared-secret=xxx --cram-hmac-alg=sha1 failed
- continuing!
]1 is not a block device!
.
==8<---
The other one takes those just fine:
[root at mac1 ~]# /sbin/drbdsetup 1 disk /dev/Data/pgdrbd1 /dev/Data/
pgdrbd1 internal --set-defaults --create-device --on-io-error=detach
[root at mac1 ~]#
mac2 doesn't like "1", but it likes /dev/drbd1:
[root at mac2 ~]# /sbin/drbdsetup /dev/drbd1 disk /dev/Data/pgdrbd1 /dev/
Data/pgdrbd1 internal --set-defaults --create-device --on-io-error=detach
[root at mac2 ~]#
The only difference is that mac1 appears to have the /dev/drbd* nodes set
up, while mac2 does not. But even if I create them by hand, it barfs:
[root at mac2 ~]# mknod /dev/drbd0 b 147 0
[root at mac2 ~]# /sbin/drbdsetup 1 disk /dev/Data/pgdrbd1 /dev/Data/pgdrbd1
internal --set-defaults --create-device --on-io-error=detach
1 is not a block device!
[root at mac1 ~]# rpm -qa|grep drbd
drbd-8.3.1-3
drbd-km-2.6.18_128.1.10.el5-8.3.1-3
[root at mac2 ~]# rpm -qa|grep drbd
drbd-km-2.6.18_128.1.10.el5-8.3.1-3
drbd-8.3.1-3
Here's the config file:
==8<---
# cat /etc/drbd.conf
global {
usage-count no;
}
common {
protocol C;
startup {
wfc-timeout 10;
degr-wfc-timeout 10;
}
disk {
on-io-error detach;
}
net {
cram-hmac-alg "sha1";
shared-secret "xxx";
}
syncer {
rate 100M;
verify-alg md5;
}
}
resource pg1 {
on mac1 {
device /dev/drbd1;
disk /dev/Data/pgdrbd1;
address 172.21.5.44:7789;
meta-disk internal;
}
on mac2 {
device /dev/drbd1;
disk /dev/Data/pgdrbd1;
address 172.21.5.17:7789;
meta-disk internal;
}
}