Node goes offline in cluster after 5 min.. help pleaseee :(

[anlaymisin]

I have 2 node in same vlan installed fresh proxmox 4.1.. I have succesfully added second node to my primary node. No errors everything was working fine than node2 was showing as offline!

Than i restarted corosync and pve-custer services on node2 and its working... and than 5 min later node2 goes back offline.. It keeps repeating..

When i restart corosync and pve-custer services on node2, i can create vms and do everything.. When node2 goes offline (~5 min later). When its looks offline i cant create any vms i got error message says: cluster not ready - no quorum? (500)

Help me please??

 

[anlaymisin]

it should be a multicast problem because i solve it with using unicast..

Use unicast instead of multicast (if all else fails)
Unicast is a technology for sending messages to a single network destination. In corosync, unicast is implemented as UDP-unicast (UDPU). Due to increased network traffic (compared to multicast) the number of supported nodes is limited, do not use it with more that 4 cluster nodes.

PVE ≥ 4.x

• Carefully read the entire corosync.conf(5) and votequorum(5) manpages.
• create the cluster as usual
• if needed, bring the initial node into quorate state with "pvecm e 1"
• /etc/pve/corosync.conf (because I don't know which one matters - update this page if you know)
• in the totem{} stanza, add "transport: udpu"
• pre-add the nodes to the nodelist{} stanza.
• reboot the node (there's probably an easier way, feel free to update this page if you know how)
• join the other nodes to the cluster

what happens if i use it with more that 4 cluster nodes???