[ClusterLabs] Corosync do not send traffic

Roberto Munoz Gomez roberto.munoz.gomez at diagroup.com
Wed Mar 30 11:09:35 EDT 2016

2016-03-30 13:42 GMT+02:00 Jan Friesse <jfriesse at redhat.com>:

> Roberto Munoz Gomez napsal(a):
>> 2016-03-30 11:27 GMT+02:00 Jan Friesse <jfriesse at redhat.com>:
>> Hello,
>>>> Due to a change in the switch in one of the datacenters now I have an
>>>> odd
>>>> behaviour in the cluster.
>>>> I am using cman with corosync and pacemaker. The versions are:
>>>> pacemaker-1.1.10-14.el6_5.3.x86_64
>>>> corosync-1.4.1-15.el6_4.1.x86_64
>>>> cman-
>>>> The problem is, when I launch /etc/init.d/pacemaker start and the
>>>> cman_tool
>>>> launch corosync, I don't see any UDP traffic, so the cluster is "broken"
>>>> But if I launch manually the same command "corosync -f" I do see udp
>>>> traffic and the totem is correctly sent between nodes.
>>>> It all began with the change in the switch, but I set the tcpdump in the
>>>> hosts and I do not see traffic.
>>>> I have tried the multicast and unicast configuration, different network,
>>>> but all with the same behaviour.
>>>> What am I missing?
>>> I'm pretty sure main problem is that:
>>> - corosync -f uses /etc/corosync/corosync.conf as a config file
>>> - cman_tool join uses /etc/cluster/cluster.conf as a config file
>> Make sure to "replicate" (specially udpu/udp, ...) configuration from
>>> corosync.conf to cluster.conf and I'm pretty sure it will work.

It worked!

I didn't knew cman_tool do not use corosync.conf. Setting udpu in
cluster.conf made it work again.

I am trying to migrate the bindnetaddr option from corosync.conf to
cluster.conf but couldn't make it work. I want to use this interface for
corosync traffic.

inet addr:  Bcast:  Mask:

In man cluster.conf says the last octect must be 0. But despite ccs_config
validate says it is ok, the cman_tool fails.


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