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>
> - Do I need to have nova-api on each compute node? I guess yes.
>
>
You might want it on another node for HA but it's not at all necessary.


> - What is good practice to run compute node? I mean do I need nova-volume,
> nova-cert and nova-scheduler on each compute node?
>

You only need nova-compute for ec2 usage on each node.  nova-volume is
needed if you intend to create volumes on those nodes.

https://github.com/cloudscaling/tarkin  has some simple tests.

Tempest I hear can do more?


>
> - Do I need to create a bridge on the new compute node, when I don't want
> to run nova-network on that node? I think bridge is only required by the
> nova-network? But than I get confused with how the network will work? I
> mean all the traffic of the VMs will go from the node running nova-network?
> I guess this is not correct right?
>
>
Depends on how your networking is set up.  But usually a bridge is created
for each virtual interface of your instances.  nova-compute will do that
for you.


> If all the traffic from VMs will route through the node running
> nova-network then should I run nova-network on each compute node as well?
> Or what is the correct way?
>
>
depends on your networking configuration.
Thanks in advance.
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