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<p class="MsoNormal"><span style="color:#1F497D">I am not sure “ip netns exec” can run a command in a VM. I think it runs the command in hypervisor OS.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">“virtio-serial” is one method supported for VM to hypervisor communication.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">One way to do this is to have proxy agent in hypervisor OS which proxies the LB configuration requests from local SLB VM to Quantum LB Driver.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">To take care of any security issues, proxy agents may need to have a mechanism to validate VM to ensure that the VM connecting to it has permissions to get the LB configuration.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks<br>
Srini<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Oleg Bondarev [mailto:obondarev@mirantis.com]
<br>
<b>Sent:</b> Monday, February 04, 2013 5:07 AM<br>
<b>To:</b> OpenStack Development Mailing List<br>
<b>Subject:</b> [openstack-dev] [quantum] executing shell commands on a tenant's VM<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi guys,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Within LBaaS effort we need to configure HAProxy service which is running on one of tenant’s VMs in a certain subnet.<o:p></o:p></p>
<p class="MsoNormal">Initially we were planning to configure two interfaces on such HAProxy VMs – one for tenant network and other for provider network – thus having an ability to simply reach the VM by ssh using an ip from provider network.<o:p></o:p></p>
<p class="MsoNormal">But finally we found this way inappropriate because it overloads provider network and provides an ability to a tenant to access provider network which is not good as well.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So I’d like to find a proper way of reaching tenant’s VM to be able to execute commands on it.
<o:p></o:p></p>
<p class="MsoNormal">In Quantum code I found that it can be done by using ‘ip netns exec’ (quantum/debug/debug_agent.py: QuantumDebugAgent.exec_command()) which is close to what I need. Are there any better ways to do it in quantum?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Oleg<o:p></o:p></p>
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