Mario

Dont see anything crazy with what you are doing so far.

I would suggest that you initially keep it simple and setup cloudstack
with basic zone.

The communication workflow you've been asking is as follows:

CloudStack Management Server talks to KVM host on port 3922
CloudStack KVM Agent talks back to Cloudstack MS on 8250

In order for CloudStack to talk to System VM, it uses the KVM host as
proxy, because the SystemVM is on link-local (unroutable) network.
Specifically, CloudStack will connect to KVM on 3922 and execute a
command called cloudstack-ssh

example: cloudstack-ssh 169.254.0.139

You can look up the KVM hypervisor and link-local IP by going to system
vm tab in UI.

If you SystemVM is started but you dont see any communication, it would
be worth doing virsh console, use root/password as access and
troubleshoot from there. Logs are posted in /var/log/cloud.out

We assume you have minimal linux skillset..

As mentioned earlier, keep it simple and deploy cloudstack with Basic
Zone so you can learn, once you get the hang of it, experiment to your
hearts desire.

Regards
ilya


On 1/7/16 2:51 PM, Mario Giammarco wrote:
> Hello,
> I am evaluating cloudstack 4.7
> I have followed instructions for creating kvm hosts with openvswitch
> networking (and vlan 100, 200, 300 as suggested)
> Tried creating a basic zone network in different ways.
> It seems ok but it cannot reaches secondary storage. 
> It is due to the fact that I cannot reach system vm.
> From documentation it is not clear at all that cloudstack needs to create
> two system vms to access secondary storage and as a proxy.
> So I tried advanced networking in the hope I can tell cloudstack right
> vlans/subnets and so on.
> When I add first host I see the host do not reply anymore.
> So I go to console and I see that cloudstack has modified openvswitch
> configuration and it has also modified /etc/network/interfaces putting
> management network on wrong vlan and so destroying completely my previous
> configuration.
> From documentation I cannot understand if I have to configure networking in
> hosts or if is cloudstack that configures it.
> Anyway it does not configure it in the right way.
> Can you please tell me a working tutorial?
> Can you please help me in some way?
> Please note that in the kvm hosts I have one network card with vlans.
> 
> Thanks in advance,
> Mario
> 

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