Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Proxmox Virtual Environment 9.0 with Debian 13 released

proxmox.com

Post reply on HN
Print view View original

41–50 of 80 posts

Re: Proxmox Virtual Environment 9.0 with Debian 13 released

#41

Post by redundantly »

woleium wrote: post #34
redundantly wrote: post #29

I like Promox a lot, but I wish it had an equivalent to VMware's VMFS. The last time I tried, there wasn't a way to use shared storage (i.e., iscsi block devices) across multiple nodes and have a failover of VMs that use that storage. And by failover I mean moving a VM to another host and booting it there, not even keeping the VM running.

Yes, you can do this with ceph on commodity hardware (or even your compute nodes, if you are brave), or if you have a bit of cash, something like a netapp to do NFS/iSCSI/NVME-oF Use any of these with the built in HA manager in proxmox

As far as I understand it, Ceph allows you to create distributed storage by using the hardware across your hosts.

Can it be used to format a single shared block device that is accessed by multiple hosts like VMFS does? My understanding is this isn't possible.

Re: Proxmox Virtual Environment 9.0 with Debian 13 released

#42

Post by riedel »

woleium wrote: post #35
riedel wrote: post #11

We are really happy with proxmox for our 4 machine cluster in the group. We evaluated many things, they were either to light or to heavy for our users and/or our group of hobbyist admins. A while back we also set up a backup server. Forum is also a great resource. I just failed to contribute a pull request via their git email workflow and I am now stuck with a non-upstreamed patch to the LDAP Sync (btw. the code ther…

Can’t it use pam? so many options for providers there.

It was mostly about syncing groups with proxmox. Worked by patching the LDAP provider to support our schema. Comment was more about the extensibility problem when doing this. Actually when you say this, I wonder how PAM could work, only ever used it for providing shell access: we typically do not have any local users on the machine. Never used PAM in a way not providing any local execution privileges (which is the whole point of a VM host).

Re: Proxmox Virtual Environment 9.0 with Debian 13 released

#43

Post by aaronius »

redundantly wrote: post #29

I like Promox a lot, but I wish it had an equivalent to VMware's VMFS. The last time I tried, there wasn't a way to use shared storage (i.e., iscsi block devices) across multiple nodes and have a failover of VMs that use that storage. And by failover I mean moving a VM to another host and booting it there, not even keeping the VM running.

That should have been possible for a while. Get the block storage to the node (FC or configure iSCSI), configure multipathing in most situations, and then configure LVM (thick) on top and mark it as shared. One nice thing this release brings is the option to finally also have snapshots for such a shared storage.

Re: Proxmox Virtual Environment 9.0 with Debian 13 released

#44

Post by redundantly »

aaronius wrote: post #43
redundantly wrote: post #29

I like Promox a lot, but I wish it had an equivalent to VMware's VMFS. The last time I tried, there wasn't a way to use shared storage (i.e., iscsi block devices) across multiple nodes and have a failover of VMs that use that storage. And by failover I mean moving a VM to another host and booting it there, not even keeping the VM running.

That should have been possible for a while. Get the block storage to the node (FC or configure iSCSI), configure multipathing in most situations, and then configure LVM (thick) on top and mark it as shared. One nice thing this release brings is the option to finally also have snapshots for such a shared storage.

I tried that, but had two problems:

When migrating a VM from one host to another it would require cloning the LVM volume, rather than just importing the group on the other node and starting the VM up.

I have existing VMware gusts that I'd like to migrate over in bulk. This would be easy enough to do by converting the VMDK files, but using LVM means creating an LVM group for each VM and importing the contents of the VMDK into the LV.

Re: Proxmox Virtual Environment 9.0 with Debian 13 released

#45

Post by aaronius »

redundantly wrote: post #44
aaronius wrote: post #43

Earlier quoted context omitted.

That should have been possible for a while. Get the block storage to the node (FC or configure iSCSI), configure multipathing in most situations, and then configure LVM (thick) on top and mark it as shared. One nice thing this release brings is the option to finally also have snapshots for such a shared storage.

I tried that, but had two problems: When migrating a VM from one host to another it would require cloning the LVM volume, rather than just importing the group on the other node and starting the VM up. I have existing VMware gusts that I'd like to migrate over in bulk. This would be easy enough to do by converting the VMDK files, but using LVM means creating an LVM group for each VM and importing the contents of the V…

Hmm, staying with iSCSI. You should create one large LUN that is available on each node. Then it is important to mark the LVM as "shared". This way, PVE knows that all nodes access the same LVM, so copying the disk images is not necessary on a live migration.

With such a setup, PVE will create LVs on the same VG for each disk image. So no handling of multiple VGs or LUNs is necessary.

The multipathing PVE wiki page lines out the whole process: https://pve.proxmox.com/wiki/Multipath

Re: Proxmox Virtual Environment 9.0 with Debian 13 released

#46

Post by zamadatix »

thyristan wrote: post #33
PeterStuer wrote: post #28

I have only recently moved to proxmox as the Hyper-V licensing became too opressive for hobby/one-person projects use. Can someone tell me wether proxmox upgrades are usually smooth sailing, or should I prepare for this being an endeavour?

Never had a problem with them. Just put each node in maintenance, migrate the VMs to another node, update, move the VMs back. Repeat until all nodes are updated.

The "update" step is a bit of a "draw the rest of the owl" in the case of major version updates like this 8.x -> 9.x release. It also depends how many features you're using in that cluster as to how complicated the owl is to draw.

That said, I just made it out alright in my home lab without too much hullabaloo.

Re: Proxmox Virtual Environment 9.0 with Debian 13 released

#49

Post by pdntspa »

redundantly wrote: post #29

I like Promox a lot, but I wish it had an equivalent to VMware's VMFS. The last time I tried, there wasn't a way to use shared storage (i.e., iscsi block devices) across multiple nodes and have a failover of VMs that use that storage. And by failover I mean moving a VM to another host and booting it there, not even keeping the VM running.

That, and configuring mount points for read-write access on the host is incredibly confusing and needlessly painful

Re: Proxmox Virtual Environment 9.0 with Debian 13 released

#50

Post by pimeys »

zamadatix wrote: post #46
thyristan wrote: post #33

Earlier quoted context omitted.

Never had a problem with them. Just put each node in maintenance, migrate the VMs to another node, update, move the VMs back. Repeat until all nodes are updated.

The "update" step is a bit of a "draw the rest of the owl" in the case of major version updates like this 8.x -> 9.x release. It also depends how many features you're using in that cluster as to how complicated the owl is to draw. That said, I just made it out alright in my home lab without too much hullabaloo.

Did you do the backup and full reinstall or just with apt?

I should do the same update this weekend. .

Post reply on HN