PVE 4.3 - DRBD best practices?

bkraegelin

Renowned Member
First, let me thank for this great new version.

After installing from scratch I see, that my disk is formatted with one large partition, which is used for lvm. I have three LVs, root, swap and data.

To build a HA cluster of 2 nodes I want to use DRBD for my storage. I don't want to change too much, so I ask for best practices.
  • Should I use this already allocated LVM-Thin named data as backing device for DRBD?
    (I already have it removed from the web interface.)
  • On top of the new DRBD storage, should I create a LVM-Thin for Images and Container?
  • Is there a better (recommended) way? Perhaps (LVM-Thin over DRBD over LVM) or (LVM over DRBD over LVM-Thin)?
Any thoughts about reliability, performance, anything else?

Thanks for any help.
Birger
 
there is no HA with two nodes and DRBD9 is only a technology preview in PVE 4..
 
yes you can use a third small node for tie-braking / quorum purposes in PVE, but you still have a two node / replica DRBD cluster which might lead to split brain or other failure situations. there is no best practice for DRBD9 in PVE - it's not recommended for production use as it's a technology preview, and there is no support from Proxmox for it.
 
there is no integration for DRBD8 in PVE 4, there is only the technology preview of DRBD9. I won't repeat myself further, if you think that a two node (DRBD) cluster works for you, I wish you good luck.
 
Is DRBD9 still considered a technology preview since your last comment

All DRBD9 packages are now maintained by Linbit, so please use packages from them directly. Also, I guess it is best to ask such questions directly on the DRBD user list.
 

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