Verified Commit f9b3d8ad authored by anarcat's avatar anarcat
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more DRBD wizardry, used in a botched ganeti install recovery

parent cda2dbcd

howto/drbd.md

+13 −1
Original line number Diff line number Diff line
@@ -94,6 +94,18 @@ Then delete it: 


    drbdsetup del-minor 0



If you get errors because the device is busy, see if you can see what

is holding on to it `/sys/devices/virtual/block/drbd0/holders`, for

example:



    # ls -l /sys/devices/virtual/block/drbd3/holders/

    total 0

    lrwxrwxrwx 1 root root 0 Aug 26 16:03 dm-34 -> ../../dm-34



Then that device map can be removed with:



    # dmsetup remove dm-34



## Pager playbook



### Resyncing disks
@@ -128,7 +140,7 @@ above): 


Then you can "reactivate" the disks simply by telling ganeti:



    $ ssh fsn-node-01.torproject.org gnt-instance activate-disks onionoo-frontend-01.torproject.org

    ssh fsn-node-01.torproject.org gnt-instance activate-disks onionoo-frontend-01.torproject.org



And then the disk will resync.