Ubuntu
drbd8 package

  1. Bug #489398
  2. Comment #15

Comment 15 for bug 489398

Revision history for this message
In , Milan (milan-redhat-bugs) wrote :

We should probably add some especial case for DRBD similar to MDinto lvm code.

But for the time being, you can blacklist underlying device for DRBD,
see lvm.conf filter setting .

When you create new PV on /dev/drbdX device, lvm should see only PV on /dev/drbd and not the underlying device.

(run vgscan ; pvs and you see something like this:
# pvs
  PV VG Fmt Attr PSize PFree
  /dev/drbd0 vg_test lvm2 a- 1020.00M 620.00M

and no duplicate warnings like
  Found duplicate PV TQrcpi4AAEzMGDHYY1cbwsByUkpLuEjj: using /dev/sdf not /dev/drbd0)

Then DRBD PV works as expected. (Your configuration is more complicated, because you are using LV for backend DRBD device - but it still should work with proper filter setting.)

Maybe for testing, explicitly name your PVs in lvm.conf.

For your config it can be:
filter = [ "a/drbd/", "a/sda/", "a/sdb/", "r/.*/" ]

(or similar rule). Then run vgscan to refresh device cache and try again.