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Hello,

I think that the generic question is - can be O~S services also accessible on Neutron networks, so VM (created by Nova) can access it? We (I and Filip) were discussing this today and we were not make a final decision. 
Another example is Murano agent running on VMs - it connects to RabbitMQ which is also accessed by Murano engine....

  Regards,

	Radek

-----Original Message-----
From: Blaha, Filip 
Sent: Wednesday, May 06, 2015 5:43 PM
To: openstack-dev at lists.openstack.org
Subject: [openstack-dev] [Murano] [Mistral] SSH workflow action

Hello

We are considering implementing  actions on services of a murano environment via mistral workflows. We are considering whether mistral std.ssh action could be used to run some command on an instance. Example of such action in murano could be restart action on Mysql DB service. 
Mistral workflow would ssh to that instance running Mysql and run "service mysql restart". From my point of view trying to use SSH to access instances from mistral workflow is not good idea but I would like to confirm it.

The biggest problem I see there is openstack networking. Mistral service running on some openstack node would not be able to access instance via its fixed IP (e.g. 10.0.0.5) via SSH. Instance could accessed via ssh from namespace of its gateway router e.g. "ip netns exec qrouter-... ssh cirros at 10.0.0.5" but I think it is not good to rely on implementation detail of  neutron and use it. In multinode openstack deployment it could be even more complicated.

In other words I am asking whether we can use std.ssh mistral action to access instances via ssh on theirs fixed IPs? I think no but I would like to confirm it.

Thanks
Filip

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