Soft cluster upgrade from pve6 to pve7

[Kan]

Hello,

I need your opinion please.

I have a 5 nodes pve6 cluster. Each node has his own independent storage. I want my nodes upgraded to pve7.
I don't want to have temporaly 2 clusters : moving vm by backup/restore results on too long downtime.
I don't want to use pve6to7 script on a production cluster.

I'm planning to add a pve7 node to the cluster and then migrate all vm and ct from one pve6 node to the new pve7 node.
Then I'll remove the empty pve6 node, resintall it (with anotjer ip address) with pve7, and add it to the cluster as a fresh new pve7 node. And then I continue rotating.

Is my process good ? I read somewhere that it is not recommended to mix pve6 and pve7 in the same cluster (why?)
How do you proceed ?

Thanks

 

[fiona]

Hi,

I don't want to use pve6to7 script on a production cluster.

Why not? It's a checker script that shows warnings and hints about things that might be interfering with the upgrade. It's especially recommended for production setups.

I'm planning to add a pve7 node to the cluster and then migrate all vm and ct from one pve6 node to the new pve7 node.
Then I'll remove the empty pve6 node, resintall it (with anotjer ip address) with pve7, and add it to the cluster as a fresh new pve7 node. And then I continue rotating.

Can be done. You could also just upgrade the existing nodes one by one following the guide.

Is my process good ? I read somewhere that it is not recommended to mix pve6 and pve7 in the same cluster (why?)

During the duration of the upgrade it's fine to have mixed versions, but it shouldn't be done for a longer time, as there can be incompatibilities and migration backwards is not guaranteed to work!