<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 6, 2015 at 9:26 AM, Fox, Kevin M <span dir="ltr"><<a href="mailto:Kevin.Fox@pnnl.gov" target="_blank">Kevin.Fox@pnnl.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">If your Mistral engine is on the same host as the network node hosting the router for the tenant, then it would probably work.... there are a lot of conditions in that statement though... Too many for my tastes. :/<br>
<br>
While I dislike agents running in the vm's, this still might be a good use case for one...<br>
<br>
This would also probably be a good use case for Zaqar I think. Have a generic "run shell commands from Zaqar queue" agent, that pulls commands from a Zaqar queue, and executes it.<br>
<br>
The vm's don't have to be directly reachable from the network then. You just have to push messages into Zaqar.<br>
<br>
>From Murano's perspective though, maybe it shouldn't care. Should Mistral abstract away how to execute the action, leaving it up to Mistral how to get the action to the vm? If that's the case, then ssh vs queue/agent is just a Mistral implementation detail? Maybe the OpenStack Deployer chooses what's the best route for their cloud?<br>
<br>
Thanks,<br>
Kevins<br></blockquote><div><br></div><div>+1 for MQ.<br><br></div><div>That is the path which proved itself to be working in most of the cases.<br><br></div><div>-1 for ssh as this is a big headache.<br><br></div><div>Thanks,<br></div><div>Gosha<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
________________________________________<br>
From: Filip Blaha [<a href="mailto:filip.blaha@hp.com">filip.blaha@hp.com</a>]<br>
Sent: Wednesday, May 06, 2015 8:42 AM<br>
<span class="im HOEnZb">To: <a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a><br>
Subject: [openstack-dev] [Murano] [Mistral] SSH workflow action<br>
<br>
</span><div class="HOEnZb"><div class="h5">Hello<br>
<br>
We are considering implementing actions on services of a murano<br>
environment via mistral workflows. We are considering whether mistral<br>
std.ssh action could be used to run some command on an instance. Example<br>
of such action in murano could be restart action on Mysql DB service.<br>
Mistral workflow would ssh to that instance running Mysql and run<br>
"service mysql restart". From my point of view trying to use SSH to<br>
access instances from mistral workflow is not good<br>
idea but I would like to confirm it.<br>
<br>
The biggest problem I see there is openstack networking. Mistral service<br>
running on some openstack node would not be able to access instance via<br>
its fixed IP (e.g. 10.0.0.5) via SSH. Instance could accessed via ssh<br>
from namespace of its gateway router e.g. "ip netns exec qrouter-... ssh<br>
<a href="mailto:cirros@10.0.0.5">cirros@10.0.0.5</a>" but I think it is not good to rely on implementation<br>
detail of neutron and use it. In multinode openstack deployment it<br>
could be even more complicated.<br>
<br>
In other words I am asking whether we can use std.ssh mistral action to<br>
access instances via ssh on theirs fixed IPs? I think no but I would<br>
like to confirm it.<br>
<br>
Thanks<br>
Filip<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr"><font color="#999999"><span style="background-color:rgb(255,255,255)">Georgy Okrokvertskhov<br>
Architect,<br><span style="font-family:arial;font-size:small">OpenStack Platform Products,</span><br>
Mirantis</span><br>
<a href="http://www.mirantis.com/" target="_blank">http://www.mirantis.com</a><br>
Tel. +1 650 963 9828<br>
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