# export rootfs

root@r1u28:/mnt/mudrac# rbd export rbd/f734a9d5-0c81-4840-a798-951941f597da.rbd.disk3 mudrac-disk3.img

root@r1u28:~# lvcreate -L 21G -n mudrac-root oscarvg
  Logical volume "mudrac-root" created.

root@r1u28:~# losetup -f /dev/oscarvg/mudrac-root
root@r1u28:~# losetup
NAME       SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE         DIO
/dev/loop1         0      0         0  0 /dev/dm-72          0
/dev/loop0         0      0         1  0 /dev/shm/test.img   0

fdisk /dev/loop1
# create partitions for rootfs so we can later use grub to boot this machine

root@r1u28:~# kpartx -a -v /dev/loop1

root@r1u28:~# dd if=/mnt/mudrac/mudrac-disk3.img of=/dev/mapper/loop1p1 bs=1M

root@r1u28:~# kpartx -d -v /dev/loop1
del devmap : loop1p1

root@r1u28:~# losetup -d /dev/loop1

root@r1u28:~# mount /dev/oscarvg/mudrac-root /tmp/mudrac-root/ -o offset=`expr 512 \* 2048`

modified:

/etc/fstab
/etc/network/intrafeces



# export home

rbd export rbd/214e17fa-22e4-490d-9ef7-d07d666f6ddf.rbd.disk1 /mnt/mudrac/home.img

root@r1u28:~# ls -alh /mnt/mudrac/*.img
-rw-r--r-- 1 root root 3.4T Aug 25 07:32 /mnt/mudrac/home.img
-rw-r--r-- 1 root root  20G Aug 25 05:43 /mnt/mudrac/mudrac-disk3.img

root@r1u28:/dev/oscarvg# lvcreate -L 3.5T -n mudrac-home oscarvg

root@r1u28:/mnt/mudrac# dd if=home.img of=/dev/oscarvg/mudrac-home bs=10M

3702261809152 bytes (3.7 TB, 3.4 TiB) copied, 34196 s, 108 MB/s


better way would be to dump data directly into lvm with something like:

rbd export -rbd-concurrent-management-ops 20 rbd/214e17fa-22e4-490d-9ef7-d07d666f6ddf.rbd.disk1 - | pv | dd of=/dev/oscarvg/mudrac-home bs=4M

default for -rbd-concurrent-management-ops is 10



# add instance to ganeti


gnt-instance add -B maxmem=4G,vcpus=4 -t plain -n r1u28 -o debootstrap+default  --disk 0:adopt=mudrac-root --disk 1:adopt=mudrac-home --net 0:link=br0002 --net 1:link=br1010 --no-name-check --no-ip-check --no-start mudrac2

gnt-instance modify -t drbd -n r1u30 --no-wait-for-sync mudrac2