First of all I think cloud-init is optional so user can select if use it or not.
So if somebody wants to deploy hosted engine the hard way by installing it on 
OS , its his choice allowed too.
For our appliance I dont think we need anything except for root password.
Last option is in case somebody have some complicated net config he needs to 
implement in the engine VM on the first run 
we should allow him the option to provide the cloud-init iso by himself and he 
can define all he wants there.

----- Original Message -----
> From: "Simone Tiraboschi" <stira...@redhat.com>
> To: de...@ovirt.org, "users-ovirt" <users@ovirt.org>
> Cc: "Fabian Deutsch" <fdeut...@redhat.com>, "Tolik Litovsky" 
> <tlito...@redhat.com>
> Sent: Thursday, 12 March, 2015 4:02:04 PM
> Subject: oVirt node, hosted-engine, oVirt appliance and cloud-init
> Hi all,
> cloud-init is a powerful tool to configure from outside a cloud
> instance or an appliance as in our scenario.
> Deploying the engine as an appliance is indeed a good way to speed up
> and make easier the hosted-engine deployment: you don't need to
> install an OS on the engine virtual machine and than install the
> engine and so on but you could simply run a ready to use oVirt
> engine appliance. But you still need to configure it and so
> cloud-init support within hosted-engine is a reasonable way to
> complement it.
> Then we could also integrate it with oVirt node to let the user input
> the required info from node TUI in order to have an almost
> unattended hosted-engine setup on oVirt node using an engine
> appliance with cloud-init.
> The idea is to collect the required information interactively from
> hosted-engine setup or from node TUI (passing them to hosted-engine
> setup via an answer file) and pass them to the appliance via
> cloud-init using a no-cloud datasource.
> So now the question is what do you really want to configure via
> cloud-init?
> It's just to define what we want in order to be more focused on user
> needs:
> for instance we could configure engine VM instance hostname, we could
> set the root password, we could create other users, we could upload
> ssh private keys, we could run a command on the first boot and so
> on.
> So, if you have any ideas or requirement about that it's the right
> time for it.
> thanks,
> Simone
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