Cluster fail time

hansm

Well-Known Member
Feb 27, 2015
62
3
48
Hello,

Corosync is used to setup a cluster between the Proxmox nodes, but what are the timeout settings? After how many seconds a node is considered dead?

We use an IGMP querier on our switches but when the master switch fails (which is the master IGMP querier) it can take up to 60 seconds before the second switch take over the IGMP querier function. Within this time multicast traffic isn't forwarded, so cluster becomes in a state where "[TOTEM ] Retransmit List" is happening. In our tests the cluster recovered itself correctly when our second switch took over the IGMP querier and also when we fail-back to the master switch. But I want to be sure about the timings used and I can't find the Corosync timeouts. This is in /etc/init.d/cman

CMAN_CLUSTER_TIMEOUT=60
CMAN_QUORUM_TIMEOUT=45

But these seems to be only for joining the cluster.

Thank you.
 

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