Hi
Im trying to create stacked device with drbd9, but im afraid it could be
not possible with current drbd-utils or drbd module, IMO it not support
correctly stacked devices.
Its also possible that i dont understand how it should be configured or
how it work :)
Please take a look on my problem/bug description, i think it could be a
bug and in current versions it is not possible to create configuration
with stacked devices.
Test env:
- 2 local servers a2 and a3, resource system-test
- 1 backup server z1 connected with a3, resource system-test-U
- resource system-test is up and primary on a3, secondary on a2, all
UpToDate
- resource system-test-U is up and primary on a3, UpToDate
- resource system-test-U cannot be synchronized with z1 because a3 deny
to enter SyncSource mode, drbdadm is executed without --stacked
parameter and always return error with code 1
IMO problem is related to drbdadm command and lack of correct stacking
support:
- when im trying to up resource on z1 i got dmesg messages on a3:
[1636671.252028] drbd system-test-U/0 drbd113 z1: helper command:
/sbin/drbdadm before-resync-source
[1636671.255933] drbd system-test-U/0 drbd113: before-resync-source
handler returned 1, dropping connection.
[1636671.255942] drbd system-test-U z1: conn( Connected -> Disconnecting
) peer( Secondary -> Unknown )
- when i execute /sbin/drbdadm before-resync-source manually i got error
message and error code 1
root@a3:/etc/drbd.d# /sbin/drbdadm before-resync-source system-test-U
'system-test-U' is a stacked resource, and not available in normal mode.
- when i execute it with --stacked parameter it works and got error code 0
root@a3:/etc/drbd.d# /sbin/drbdadm before-resync-source --stacked
system-test-U
My configuration:
resource system-test {
protocol C;
device /dev/drbd13;
meta-disk internal;
net {
cram-hmac-alg "sha1";
shared-secret "XXX";
}
on a2 {
disk /dev/vg_ssd/drbd-system-test;
address X.X.X.2:YY013;
}
on a3 {
disk /dev/vg_ssd/drbd-system-test;
address X.X.X.3:YY013;
}
}
resource system-test-U {
protocol A;
device /dev/drbd113;
meta-disk internal;
net {
cram-hmac-alg "sha1";
shared-secret "ZZZZZ";
}
stacked-on-top-of system-test {
address X.X.X.3:YY113;
}
on z1 {
disk /dev/vg_ssd/drbd-system-test;
address X.X.X.1:YY113;
}
}
Im using Ubuntu 16.04 with drbd packages in versions:
ii drbd-dkms 9.0.14-1ppa1~xenial1 all
RAID 1 over TCP/IP for Linux module source
ii drbd-utils 9.4.0-1ppa1~xenial1 amd64
RAID 1 over TCP/IP for Linux (user utilities)
--
Artur Kaszuba
_______________________________________________
drbd-user mailing list
[email protected]
http://lists.linbit.com/mailman/listinfo/drbd-user
