Lozgachev Ivan <[EMAIL PROTECTED]> wrote:
> I have 3 clusters. On each node of clusters started daemon service gmond. But
> I have 1 cluster in my web-ganglia interface. All clusters belong to the same
> LAN. My configuration files:
>
> gmetad.conf
> data_source "UNN cluster" localhost
>
> gmond.conf
> cluster {
> name = "UNN cluster"
> }
> udp_send_channel {
> host = 127.0.0.1
> port = 8649
> }
>
> gmetad service started on 1 main node in first cluster.
>
> Nodes belonging to different clusters are contained in one list.
> How to divide the entire list of all nodes into 3 parts named (for
> example) "cluster1", "cluster2", "cluster3"?
This is another one of those counterintuitive things about Ganglia you
probably would miss from reading the docs: the cluster name= in
gmond.conf does *not* actually define clusters. Rather, it puts a
string in the right field for gmond to get a cluster name from when it
uses that node as a data source. Which hosts are members of the
cluster is determined by which hosts that node knows about. If all
your gmond nodes read each others' multicasts and have all of them in
the XML, then they're one cluster.
To have separate clusters, you need to separate out the traffic so
that gmond nodes in each cluster only see multicast traffic from other
nodes in the same cluster. You can do this in two ways:
- use a different port for each cluster
- use a different multicast IP address for each cluster
Or, you can use unicast, and explicitly decide which gmond talks to
which collector gmond. Just make sure each collector gmond only gets
updates from other nodes in the same cluster, and not from others.
gmetad will get the cluster's name from the name= in the gmond it uses
as a date source, but the cluster *membership* doesn't depend on name.
-- Cos
-------------------------------------------------------------------------
This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
Build the coolest Linux based applications with Moblin SDK & win great prizes
Grand prize is a trip for two to an Open Source event anywhere in the world
http://moblin-contest.org/redirect.php?banner_id=100&url=/
_______________________________________________
Ganglia-general mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/ganglia-general
