Creating a two node cluster

[Gandolf]

I have two fresh installations of proxmox-ve. I have logged into both box's and added the IP and hostnames of both nodes to the hosts file in /etc.
I have testing pinging by name and ip on both nodes. Works without issue.

Creating the cluster on node1 works fine.
When running the command on node2 pvecm add node1 (tried both name and IP) node2 fails to start quorum.
I thought I made a mistake somewhere and I have rebuilt both box's twice now always ending with the same error.

Here is what I have done in steps. If you see a mistake please let me know.
Install from proxmox from CD ver 3.2-4/e24a91c1
setup the network, and hostname during install
from the console logon to each node and add the other node to /etc/hosts
test ping by name and ip on each node
on node1 run command pvecm create proxmox-cluster
wait till it starts the cluster
on node2 run command pvecm add node1
hangs on starting cluster at the quorum times out then fails.

I tried this a second time after I have created a shared iscsi storage thinking quorum may need to be on a shared storage. same problem

 

[spirit]

Hi, you need 3 nodes for quorum.

https://pve.proxmox.com/wiki/Proxmox_VE_2.0_Cluster#Two_nodes_cluster_and_quorum_issues

 

[Gandolf]

Is there any solution for 2 nodes

 

[spirit]

Is there any solution for 2 nodes

If you have an iscsi shared storage, you can use a disk lun to have quorum.

https://pve.proxmox.com/wiki/Two-Node_High_Availability_Cluster

 

[Gandolf]

Thanks spirit. I will try this tomorrow and let you know how it goes.

 

[dietmar]

When running the command on node2 pvecm add node1 (tried both name and IP) node2 fails to start quorum.

This usually indicates a multicast problem on your network.

 

[adamb]

This usually indicates a multicast problem on your network.

I agree, even without 3 nodes he should have no issues creating the cluster with 2 nodes. Check to ensure you switch supports multicast and that it is enabled.

 

[Gilberto Ferreira]

If you have an iscsi shared storage, you can use a disk lun to have quorum.

https://pve.proxmox.com/wiki/Two-Node_High_Availability_Cluster

If you use iSCSI shared storage, please reminder to change node.startup = automatic on /etc/iscsi/nodes/<TARGET>/<PORTAL>/default in each server, in order to initialize iSCSI before pve-cluster bring online... Otherwise, quorum will fail...

 

[Gandolf]

Currently I am testing this in ESXi 5.5. the distributed switch they are plugged into, according to VMWare supports multicast.

Once I am finished with my POC, I will be purchasing the real hardware that I will be moving this to.

Question 1. I had planned on purchasing a Dumb gigabyte switch. Will those normally work with multicast?
Question 2. If it doesn't work what about a crossover cable between the two proxmox servers?

Thanks in Advance,

 

[adamb]

Currently I am testing this in ESXi 5.5. the distributed switch they are plugged into, according to VMWare supports multicast.

Once I am finished with my POC, I will be purchasing the real hardware that I will be moving this to.

Question 1. I had planned on purchasing a Dumb gigabyte switch. Will those normally work with multicast?
Question 2. If it doesn't work what about a crossover cable between the two proxmox servers?

Thanks in Advance,

For the most part yes, but every switch is different. Definitely check the documentation before purchasing or call the manufacture directly to get confirmation.

 

[Gandolf]

Thanks for the reply