More info on juju

[Mark Mims]

On 04/28/2012 09:50 AM, tog wrote:
> Hi there
>
> I would like to install a cluster where one node will be a master and the
> other the slaves.
> I would like those to collaborate in some way - for example if using NFS I
> would like the slave to mount a filesystem from the master.
>
> I will have a charm for the master and one for the slaves.
> I will probably install on the slave first and then on the slaves.
>
> How can I send some information from the master to the slaves - actual
> hostname for example ?
> What If I wanted also the master to know the hostname from the slaves ?
> Shall I use a 2 steps install procedure ?
>
> I started looking at the hadoop charm which should somehow have a similar
> requirements - but I did not see something of that sort.
Hi Guillaume,

the hadoop charm lp:charms/hadoop is a great example of best-practice on 
this.  The concept there is that it's _one_ charm that behaves 
differently depending on if it's master or slave.  The readme in this 
charm is awesome and shows how this 'role' can be specified at relation 
time.

>
> Best Regards
> Guillaume
>
>
>
>


-- 
Mark Mims, Ph.D.
Canonical Ltd.
mark.mims at canonical.com
+1(512)981-6467

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