Hi,
Environment: AWS EC2+EBS, CentOS 7.7
I am doing a snapshot from a working DBRD disk set, so not from the DRBD
volume, but the underlying "physical" disk, which is an AWS EBS volume in this
case. The host from which the snapshot is taken is using DRBD 9.0.1-1.
>From this snapshot I create a new EBS volume and trying to use it on another
>AWS EC2 instance, which has a slightly newer DRBD version:
# modinfo drbd
filename:
/lib/modules/3.10.0-1062.18.1.el7.x86_64/weak-updates/drbd90/drbd.ko
alias: block-major-147-*
license: GPL
version: 9.0.20-1
Config is all default, ressource is like this:
resource xxx {
device /dev/drbd0;
disk /dev/disk/by-id/nvme-Amazon_Elastic_Block_Store_volxxx;
meta-disk internal;
on node-1 {
address 10.0.0.1:7788;
}
on node-2 {
address 10.0.0.2:7788;
}
}
When trying to bring up the ressource, I get this error message:
# drbdadm up xxx
0: Failure: (119) No valid meta-data signature found.
==> Use 'drbdadm create-md res' to initialize meta-data area. <==
Command 'drbdsetup attach 0
/dev/disk/by-id/nvme-Amazon_Elastic_Block_Store_volxxx
/dev/disk/by-id/nvme-Amazon_Elastic_Block_Store_volxxx internal' terminated
with exit code 10
===> When doing as advised, I wonder about the following message:
# drbdadm create-md xxx
You want me to create a v09 style flexible-size internal meta data block.
There appears to be a v09 flexible-size internal meta data block
already in place on /dev/disk/by-id/nvme-Amazon_Elastic_Block_Store_volxxx byte
offset 64424505344
===> So it is saying there _is_ metadata already present. So why is it not
valid? Is this expected behavior when cloning a drbd physical disk to another
host? Is it safe to create new metadata in this case?
Do you really want to overwrite the existing meta-data?
[need to type 'yes' to confirm] yes
md_offset 64424505344
al_offset 64424472576
bm_offset 64422506496
Found ext3 filesystem
62912604 kB data area apparently used
62912604 kB left usable by current configuration
Even though it looks like this would place the new meta data into
unused space, you still need to confirm, as this is only a guess.
Do you want to proceed?
[need to type 'yes' to confirm] yes
initializing activity log
initializing bitmap (1920 KB) to all zero
Writing meta data...
New drbd meta data block successfully created.
Thanks much & regards
Markus
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