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<p class="MsoPlainText"><span lang="EN-US">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Port is a resource define in Heat. And heat support the actions: create a port/delete a port/attach to a server/detach from a server.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">But we can’t re-attach a port which once be detached.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-----------------------------------------------------------------------------------------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">There is such a scenario:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Create a stack with a template:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US">……<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US">resources:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> my_instance:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> type: OS::Nova::Server<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> properties:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> image: { get_param: ImageId }<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> flavor: { get_param: InstanceType }<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> networks: [ { "port" : {"Ref": "instacne_port"}}]<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> <o:p>
</o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> instacne_port:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> type: OS::Neutron::Port<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> properties:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:0cm"><i><span lang="EN-US"> network_id: { get_param: Network }</span></i><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:0cm"><span lang="EN-US">
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:0cm"><span lang="EN-US">Heat will create a port and a server, and attach the port to the server.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:0cm"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">I want to attach the port the another server, so I update the stack with a new template:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US">……<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US">resources:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> my_instance:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> type: OS::Nova::Server<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> properties:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> image: { get_param: ImageId }<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> flavor: { get_param: InstanceType }<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> my_instance2:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> type: OS::Nova::Server<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> properties:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> image: { get_param: ImageId }<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> flavor: { get_param: InstanceType }<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> networks: [ { "port" : {"Ref": "instacne_port"}}]<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> <o:p>
</o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> instacne_port:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> type: OS::Neutron::Port<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> properties:<o:p></o:p></span></i></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><i><span lang="EN-US"> network_id: { get_param: Network }</span></i><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:0cm"><span lang="EN-US">Heat will invoke the nova “detach_interface” API to detach the interface, and wanted to attach the port to the new server.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:0cm"><span lang="EN-US">But the stack update is failed , and there is an 404 “portId not find” error raised on neutron. Because the port has been deleted while detaching.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:0cm"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:18.0pt;text-indent:0cm"><span lang="EN-US">There is no real detach api for heat to invoke. The nova API “detach_interface” will invoke the Neutron API “delete_port”, and then the port will be deleted.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> -------------------------------------------------------------------------------------------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I think there are two solutions:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">First: <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Heat get the port information before to “detach”, and to create the port again before to “attach”.
<o:p></o:p></span></p>
<p><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif"">But I think it looks ugly and will increase risk failure for re-create.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Second:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Neutron provide a detach_port api to nova, so that nova provide the real “detach” not “delete” to heat.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What do you think about?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Cheers<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Tianhua<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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