Greetings!
I have been trying for some time to solve this, hopefully someone here
can help. I currently have a working three node proxmox/drbd/linstor
cluster, but have an interesting use case in addition that I cannot seem
to make work.
One of the 3 nodes has a large amount of spinning disks that I would
like to use throughout the cluster as well, but I have no way to
replicate that storage to the other two. So I want to use two of the
three nodes as "diskless" clients, while only the one node provides
actual storage. I do not care about redundancy for this storage
instance, I only want to be able to mount the storage from any node,
mainly because the two without the storage are more powerful machines as
far as CPU and memory are concerned, but do not have the ability to host
the actual storage. I understand it is not ideal, but in this home lab,
it is all I have.
I could use NFS for this, but would rather use drbd, as I am fairly
certain it would perform better due to the nature of the raw storage,
rather than qcow2 images.
So here is what I have tried:
I have created as a test, a small lvm thinpool as a storage-pool on node1
# linstor storage-pool create lvmthin tank1 test test/pve
Then I created on tank2/tank3 diskless storage-pools.
# linstor storage-pool create diskless tank2 test
# linstor storage-pool create diskless tank3 test
This is the result:
# linstor storage-pool list
┊ StoragePool ┊ Node ┊ Driver ┊ PoolName ┊ FreeCapacity ┊
TotalCapacity ┊ SupportsSnapshots ┊ State ┊
╞═══════════════════════════════════════════════════════════════════════════════════════════════════════════╡
*snip*
┊ test ┊ tank1 ┊ LVM_THIN ┊ test/pve ┊ 4.98 GiB ┊ 4.98
GiB ┊ True ┊ Ok ┊
┊ test ┊ tank2 ┊ DISKLESS ┊ ┊ ┊ ┊
False ┊ Ok ┊
┊ test ┊ tank3 ┊ DISKLESS ┊ ┊ ┊ ┊
False ┊ Ok ┊
╰───────────────────────────────────────────────────────────────────────────────────────────────────────────╯
I then created the resource group:
# linstor resource-group create --storage-pool test --place-count 1
--diskless-on-remaining test
(For clarity, I am not sure what to put for --place-count, so I tried 3
as well with the same result. I also tried without
--diskless-on-remaining... same.)
Then I finally created the volume-group
# linstor volume-group create test
When adding this storage to proxmox's storage.cfg, I lose the web
interface of proxmox, and refreshing the page only provides the
Datacenter top level section in the left pane, with nothing underneath
it. No nodes or anything. Removing the storage.cfg entries, makes it
all come back. Very strange, and want to verify I did everything correctly.
drbd: test
content images,rootdir
controller 10.128.1.100
resourcegroup test
controllervm 100
Any ideas? Thanks in advance.
-phunyguy
_______________________________________________
Star us on GITHUB: https://github.com/LINBIT
drbd-user mailing list
[email protected]
https://lists.linbit.com/mailman/listinfo/drbd-user
