I want to use a single partition shared between two physical servers of a proxmox cluster(two node cluster). In this scenario, do I need to use gfs2 for the shared partition? If so, how to configure GFS2 and lvm in a proxmox cluster? Please help.
Shared Storage in proxmox - GFS2
- Thread starter Joby Mathai
- Start date
GFS2 is for distributed shared storage, so that both nodes "have" the data on their disks and only its contents are replicated. From what I understand of your request, this is NOT what you want (please correct me). You just want to share one partition with multiple nodes and this can be done with NFS.
Be aware of the problems with a cluster just consisting of two nodes, for quorum you need at least 3 (quorum) nodes. Without that, if one host goes down, you cannot do any reconfiguration of the cluster.
Yes, I am aware of the two node cluster issue. I need to mount the partition in both servers(cluster nodes) and both nodes will be able to access the partition and write data. Both nodes will be creating containers in that partion and if one machine goes down, I can migrate the machines to the other node within seconds. This is my requirement and as far as I know, GFS2 partitions are meant for this purpose. Correct me, if I am wrong.
All (except one) references on https://en.wikipedia.org/wiki/GFS2 are dated pre 2010. Are you sure it is a valid option?
If you are not a specialist in that area I would recommend to use an officially supported filesystem: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_storage_types
For me this is mostly ZFS and replication based distribution between relevant nodes.
If you are not a specialist in that area I would recommend to use an officially supported filesystem: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_storage_types
For me this is mostly ZFS and replication based distribution between relevant nodes.
The data has to be on both nodes, so you need a disk with the same amount of space on both of them.
Possible solutions (I know of) are:
- ZFS replication (Supported), as @UdoB already pointed out
- DRBD + LVM (unsupported)
- DRBD + OCFS2 (unsupported)
- GFS2 (unsupported)
from https://www.kernel.org/doc/html/latest/filesystems/gfs2.html:
gfs2 # drbd
gfs2 is still in development although the most current version is 3.41, released two years ago. I would be wary of using this in production as the devteam is limited in resources. see https://pagure.io/gfs2-utils
There is at least one known deployment of gfs2 I remember from this forum- see https://forum.proxmox.com/threads/p...-lvm-lv-with-msa2040-sas-partial-howto.57536/
Op had an interesting approach and it was working for him.
there is no integration or support for GFS2 in Proxmox. As far as PVE is concerned it will see a mountpoint with "some" filesystem on it and the administrator told PVE that its safe to use.
Configuring and supporting GFS2 on each node in the cluster is completely up to you. Proper GFS2 configuration by the administrator, you, is the only thing that stands to prevent data loss due to concurrent access from multiple nodes.
Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox