Re: Ganeti single node installation

[Guido Trotter]

On Mon, Jul 23, 2012 at 4:21 PM, Nicolas Odermatt <oder...@gmail.com> wrote:

Hey there guys,

I am installing a single node installation of ganeti to check wether this would fit my company's needs for hosting websites.

Right now I managed to install the software but sadly I'm stuck on some initial configuration steps. After the installation one must initialize the cluster by using the gnt-cluster cmdlet.
gnt-cluster init gcluster

*note that "gcluster" is the name of my cluster.

But after I enter the command, the server prints the following error message:

Failure: prerequisites not met for this operation:

error type: resource_not_unique, error details:

Cluster IP already active

I did some research and found valuable information on this thread:

https://groups.google.com/forum/?fromgroups#!topic/ganeti/jc9ta9YyAmg

Apparently ganeti requires a seperate IP address for each node and the cluster itself. Furthermoore you need to configure the FQDN for your nodes and the cluster. I did this in the hosts file, which is supposed to work, too.

hosts:

#127.0.1.1      ganeti.coala.ch ganeti
192.168.17.225  ganeti.coala.ch ganeti
10.0.2.15       gcluster.coala.ch gcluster.coala.ch

Note that the "gcluster" ip must not be active on the node before gnt-cluster init time.

gnt-cluster init will bring that ip up on the master_netdev interface (configurable via a flag)

 

My question are:

1. Is it even possible to deploy ganeti on a single node?

Yes.

 

1. Are there documentations for such an undertaking?

The admin and install guide should help you there, even for a single node.

 

1. How can I learn more about the way ganeti works? (I already read the installation and administration guides but I need more fundamential information)

What are you missing, exactly?

Thanks,

Guido