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[Linux-cluster] Some problems with fence_virt.conf



Hi all,

 I am trying to setup a virtual kvm guest cluster under a centos 6.3
x86_64 (guests are CentOS 6.3, too). When  I have setup
fence_virt.conf (I will use fence_xvm/fence_virt to fence guests),
these errors appears:

[root kvmhost etc]# fence_virtd -F -d99
Background mode disabled
Debugging threshold is now 99
fence_virtd {
	debug = "99";
	listener = "multicast";
	backend = "libvirt";
	module_path = "/usr/lib64/fence-virt";
}

listeners {
	multicast {
		key_file = "/etc/cluster/fence_xvm.key";
		address = "255.0.0.15";
		family = "ipv4";
		port = "1229";
		interface = "prodif";
	}

}

backends {
	libvirt {
		uri = "qemu:///system";
	}

}

Backend plugin: libvirt
Listener plugin: multicast
Searching /usr/lib64/fence-virt for plugins...
Searching for plugins in /usr/lib64/fence-virt
Loading plugin from /usr/lib64/fence-virt/libvirt.so
Registered backend plugin libvirt 0.1
Loading plugin from /usr/lib64/fence-virt/multicast.so
Failed to map backend_plugin_version
Registered listener plugin multicast 1.1
2 plugins found
Available backends:
    libvirt 0.1
Available listeners:
    multicast 1.1
Debugging threshold is now 99
Using qemu:///system
Debugging threshold is now 99
Got /etc/cluster/fence_xvm.key for key_file
Got ipv4 for family
Got 255.0.0.15 for address
Got 1229 for port
Got prodif for interface
Reading in key file /etc/cluster/fence_xvm.key into 0x13bb070 (4096 max size)
Actual key length = 4096 bytes
Setting up ipv4 multicast receive (255.0.0.15:1229)
Joining multicast group
Failed to bind multicast receive socket to 255.0.0.15: Invalid argument
Check network configuration.
Could not set up multicast listen socket

Why is not possible to bind multicast socket?? In kvm host I have
installed these packages:

[root kvmhost etc]# rpm -qa | grep fence | sort
fence-virt-0.2.3-9.el6.x86_64
fence-virtd-0.2.3-9.el6.x86_64
fence-virtd-libvirt-0.2.3-9.el6.x86_64
fence-virtd-multicast-0.2.3-9.el6.x86_64


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