[Linux-cluster] can't communicate with fenced -1

[Gian Paolo Buono]

Hi,

We have two RHEL5.1 boxes installed sharing a
single iscsi emc2 SAN, whitout fence devices. System is configured
as a high-availability system of xen guest.

One of the most repeating problems are fence_tool related.

  # service cman start
  Starting cluster:
     Loading modules... done
     Mounting configfs... done
     Starting ccsd... done
     Starting cman... done
     Starting daemons... done
     Starting fencing... fence_tool: can't communicate with fenced -1

  # fenced -D
  1204556546 cman_init error 0 111

  # clustat
  CMAN is not running.

  # cman_tool join

  # clustat
  msg_open: Connection refused
  Member Status: Quorate
    Member Name                        ID   Status
    ------ ----                        ---- ------
    yoda1                             1 Online, Local
    yoda2                             2 Offline

Sometimes this problem gets solved if the two machines are rebooted at
the same time. But in the current HA configuration, I cannot guarantee
two systems will be rebooted at the same time for every problem we
face. This is my config file:

###################################cluster.conf####################################

<?xml version="1.0"?>
<cluster alias="yoda-cl" config_version="2" name="yoda-cl">
        <fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/>
        <clusternodes>
                <clusternode name="yoda2" nodeid="1" votes="1">
                        <fence/>
                </clusternode>
                <clusternode name="yoda1" nodeid="2" votes="1">
                        <fence/>
                </clusternode>
        </clusternodes>
        <cman expected_votes="1" two_node="1"/>
        <rm>
                <failoverdomains/>
                <resources/>
        </rm>
        <fencedevices/>
</cluster>
###################################cluster.conf####################################
Regards.
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