4:52 a.m.
Hi list,
I had to relocate my third node in a classic DRBD 8.4 three node set up
to a new host. I am having difficulty making the stacked resource the
primary. I am following this guide:
https://www.linbit.com/drbd-user-guide/users-guide-drbd-8-4/#s-three-nodes
Specifically this:
5.18.3. Enabling stacked resources
To enable a stacked resource, you first enable its lower-level
resource and promote it:
drbdadm up r0
drbdadm primary r0
As with unstacked resources, you must create DRBD meta data on the
stacked resources. This is done using the following command:
# drbdadm create-md --stacked r0-U
Then, you may enable the stacked resource:
# drbdadm up --stacked r0-U
# drbdadm primary --stacked r0-U
After this, you may bring up the resource on the backup node, enabling
three-node replication:
# drbdadm create-md r0-U
# drbdadm up r0-U
It seems all is good right up to the last command:
:~# drbdadm primary informer
:~# drbdadm create-md --stacked informer-U
You want me to create a v08 style flexible-size internal meta data block.
There appears to be a v08 flexible-size internal meta data block
already in place on /dev/drbd11 at byte offset 429483581440
Do you really want to overwrite the existing meta-data?
[need to type 'yes' to confirm] yes
md_offset 429483581440
al_offset 429483548672
bm_offset 429470441472
Found some data
==> This might destroy existing data! <==
Do you want to proceed?
[need to type 'yes' to confirm] yes
initializing activity log
NOT initializing bitmap
Writing meta data...
New drbd meta data block successfully created.
:~# drbdadm up --stacked informer-U
:~# drbdadm primary --stacked informer-U
110: State change failed: (-2) Need access to UpToDate data
Command 'drbdsetup-84 primary 110' terminated with exit code 17
drbd11 is the device for the lower level resource 'informer', drbd110
the device for stacked resource 'informer-U'. Replication between hosts
'Alice' and 'Bob' (not the real host names but corresponding to the
names used int the documentation) is functional. I am performing the
above commands on 'bob'.
I do not understand why it is complaining it needs UpToDate data in that
last command if 'informer-U' is 'stacked-on-top-of informer' and was
just created.
the .res file(s) look like this:
resource informer {
net {
protocol C;
}
device /dev/drbd11;
meta-disk internal;
on trk-kvm-01 {
address 10.10.1.125:7789;
disk /dev/trk-kvm-01-vg/informer;
}
on trk-kvm-02 {
address 10.10.1.126:7789;
disk /dev/trk-kvm-02-vg/informer;
}
}
resource informer-U {
net {
protocol A;
}
stacked-on-top-of informer {
device /dev/drbd110;
address 10.10.2.126:7789;
}
on trk-bkp-01 {
device /dev/drbd110;
disk /dev/ubuntu-vg/informer;
address 10.10.2.127:7789;
meta-disk internal;
}
}
Any suggestions on what I am missing in this picture?
Please and thanks.
--
Paul O'Rorke
Tracker Software Products (Canada) Limited
www.tracker-software.com <https://www.tracker-software.com>
Tel: +1 (250) 324 1621
Fax: +1 (250) 324 1623
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www.tracker-software.com/support <https://www.tracker-software.com/support>
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