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From: Herbert Poetzl (herbert_at_13thfloor.at)
Date: Thu 28 Oct 2004 - 16:45:51 BST


On Thu, Oct 28, 2004 at 09:58:13AM -0400, Benoit des Ligneris wrote:
> Hello,
>
> I tried to make ganglia run on a vserver. This is a monitoring package
> that uses multicast to publish information about its state.
>
> I've found an old message about this setting :
> http://list.linux-vserver.org/archive/vserver/msg07038.html
>
> Without particular precaution, I have the same result :
> gmond -d2
> pthread_attr_init
> creating cluster hash for 1024 nodes
> hash_create size = 1024
> hash->size is 1031
> gmond initialized cluster hash
> Using interface eth0
> g_mcast_socket_bind() error: Cannot assign requested address
> g_mcast_in() failed: Cannot assign requested address
>
> If I add the multicast address in the vserver.conf file
> (IPROOT="192.168.4.5 239.2.11.71") then I obtain the following :
> gmond -d2
> pthread_attr_init
> creating cluster hash for 1024 nodes
> hash_create size = 1024
> hash->size is 1031
> gmond initialized cluster hash
> Using interface eth0
> mcast listening on 239.2.11.71 8649
> XML listening on port 8649
> listening thread(s) have been started
> listening thread(s) have been started
> cleanup thread has been started
> gmond could not connect to multicast channel: Invalid argument

hmm, well, maybe some details via strace?

> which is better (I think ;-) but still not working.
>
> I know out of my mind of some applications that rely on multicast
> (ganglia, cups, openSLP, etc.) and it would be convenient if multicast
> can be enabled in a vserver.

does that mean you are volunteering to test multicast
for linux-vserver?

> What are the technical difficulties ?

don't know yet ...

best,
Herbert

> Ben
>
> --
> Benoit des Ligneris Ph. D.
> President de Revolution Linux http://www.revolutionlinux.com/
> OSCAR Chair http://oscar.openclustergroup.org/
> Chef de projet EduLinux http://www.edulinux.org/
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