Cluster installation

[virttom]

Tadum !

Ok after a brillant class relative to PROXMOX VE & CEPH with ODISIO, I'm going to activate a real HCI cluster well on a POC for the beginning

Si I have : 4 good 1/2u nodes with :
+ 4HDD & 2 SSD each (One for serv install + Write cache),
+ 2 CPU w/ 10 core,
+ 192 Go RAM,
+ 2 x 10GB port that are going to SI front-end,
+ 2 x 10 GB port that are going to my 2 backend dedicated switches.

I want to separate networks because security is a major concern on this product. I planned, for the sake of my brain, to test a relatively secured configuration :

1 net is dedicated to PVE admin (and IPMI card), AND to VM (because it's a POC),
1 net is dedicated to CEPH,
1 net is dedicated to corosync.

For it's a POC, i don't have a real DNS so I decided to test w/ hosts files. My question is, since I want my PVE to talk to themselves by my corosync dedicated network, and my do I have to configure only this net on my hosts files ? or should I configure both management and dedicated net and use my management net for corosync secondary net ?

 

[aaron]

My question is, since I want my PVE to talk to themselves by my corosync dedicated network, and my do I have to configure only this net on my hosts files ?

What exactly do you mean by "PVE talk to themselves"? There are different kinds of traffic between PVE nodes. The most common one is corosync. But other services like a VM live migration is another one. One that could take up a lot of bandwidth which you would like to keep away from the corosync network.

 

[virttom]

well you're definitly right I need to be more precise : I wrote about corosync communication. I resolved this question by the best way in a POC case : trying, making a mistake and reinstalling all and trying again

So the answer is "don't forget to configure the link0 on your first node". And RTFM as everything is on the documentation