CRS (cluster resource scheduler)

[bastinator_school]

Hi i am about to deploy a 7 host proxmox cluster and want loadbalancing.

Ive read alot about CRS but to me its unclear whether CRS is only used for bringing up HA machines or whether it can handle live migrations to loadbalance my servers

any help is appreciated

 

[fiona]

Hi,
please see: https://pve.proxmox.com/pve-docs/chapter-ha-manager.html#ha_manager_crs
There currently is no dynamic load balancing. Load balancing will only happen when guests need to be recovered/migrated off from a node that failed or goes into maintenance. There also is the ha-rebalance-on-start option. If enabled, when starting a new guest, the node with the lowest (static) usage will be chosen. Please note that all of this is still a technology preview, usage from non-HA guests will not be considered and the calculation is based on the statically configured RAM/CPU of guests rather than the actual dynamic usage.

 

[bastinator_school]

Hi,
please see: https://pve.proxmox.com/pve-docs/chapter-ha-manager.html#ha_manager_crs
There currently is no dynamic load balancing. Load balancing will only happen when guests need to be recovered/migrated off from a node that failed or goes into maintenance. There also is the ha-rebalance-on-start option. If enabled, when starting a new guest, the node with the lowest (static) usage will be chosen. Please note that all of this is still a technology preview, usage from non-HA guests will not be considered and the calculation is based on the statically configured RAM/CPU of guests rather than the actual dynamic usage.

thank you for your response ive read the documentation the part that tripped me was

The CRS algorithm is not applied for every service in every round, since this would mean a large number of constant migrations. Depending on the workload,this could put more strain on the cluster than could be avoided by constantbalancing.That’s why the Proxmox VE HA manager favors keeping services on their current node.

because it souded like it would be loadbalancing but thank you anyway