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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Inline for
</span><span style="font-size:11.0pt">“</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">set instance state</span><span style="font-size:11.0pt">”</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Br,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Tomi<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt">
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Afek, Ifat (Nokia - IL/Kfar Sava) [mailto:ifat.afek@nokia.com]
<br>
<b>Sent:</b> Sunday, July 09, 2017 3:14 PM<br>
<b>To:</b> dong.wenjuan@zte.com.cn; openstack-dev@lists.openstack.org<br>
<b>Subject:</b> Suspected SPAM - Re: [openstack-dev] [Vitrage] [aodh] Integration with doctor<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Hi dwj,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Adding [aodh] for item #2.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Please see my answers inline.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Best Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">Ifat.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<b><span style="font-family:"Calibri",sans-serif;color:black">From: </span></b><span style="font-family:"Calibri",sans-serif;color:black">"</span><a href="mailto:dong.wenjuan@zte.com.cn"><span style="font-family:"Calibri",sans-serif">dong.wenjuan@zte.com.cn</span></a><span style="font-family:"Calibri",sans-serif;color:black">"
<</span><a href="mailto:dong.wenjuan@zte.com.cn"><span style="font-family:"Calibri",sans-serif">dong.wenjuan@zte.com.cn</span></a><span style="font-family:"Calibri",sans-serif;color:black">><br>
<b>Date: </b>Friday, 7 July 2017 at 10:53</span><o:p></o:p></p>
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<p style="margin-left:36.0pt">Hi,<o:p></o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p style="margin-left:36.0pt">For the integration Vitrage with doctor, I have some issues which need to be confirmed~ :)<o:p></o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p style="margin-left:36.0pt">1. Notification strategies: conservative (nova->Aodh)<o:p></o:p></p>
<p style="margin-left:36.0pt">@Ifat<o:p></o:p></p>
<p style="margin-left:36.0pt">In the host_down_scenarios.yaml[1], we only set the host state as error.
<o:p></o:p></p>
<p style="margin-left:36.0pt">But in doctor current use case, we need to call nova API 'nova reset-state' to<span style="color:red"> set instance state</span> as error to trigger the event alarm and notify the consumer.<o:p></o:p></p>
<p style="margin-left:40.8pt">Is it needed to be fix?<o:p></o:p></p>
<p style="margin-left:36.0pt">[Tomi] Either to have this fixed or propose an alternative in Doctor project where project (tenant) is able to have alarm about instances affected by other means. Project anyhow already know about “host forced down” in Nova servers
API trough “host_status”, so it is just about getting an alarm on instance (server) level also.<o:p></o:p></p>
<p style="margin-left:36.0pt">We need to add 'Aodh' and 'Nova' notifier plugins in Vitrage config file for doctor integration, right?<o:p></o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p><span style="font-family:"Calibri",sans-serif">[Ifat] Vitrage currently doesn’t call set instance state, but this can easily be added. The required steps are:<o:p></o:p></span></p>
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<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:0cm;mso-list:l1 level1 lfo3">
<span style="font-family:"Calibri",sans-serif">Add “set state” action for the instances in the template yaml file<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:0cm;mso-list:l1 level1 lfo3">
<span style="font-family:"Calibri",sans-serif">In the Nova notifier, add a call to nova reset-state API
<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:0cm;mso-list:l1 level1 lfo3">
<span style="font-family:"Calibri",sans-serif">The Aodh plugin is not needed in this case, since the flow is Vitrage -> Nova -> Aodh with no direct calls from Vitrage to Aodh<o:p></o:p></span></li></ul>
<p><o:p> </o:p></p>
<p><o:p> </o:p></p>
<p style="margin-left:36.0pt">2. Notification strategies: shortcut (inspector->Aodh)<o:p></o:p></p>
<p style="margin-left:36.0pt">@Ryota<o:p></o:p></p>
<p style="margin-left:36.0pt">Do we have any plans to change to shortcut notification?<o:p></o:p></p>
<p style="margin-left:36.0pt">@Ifat<o:p></o:p></p>
<p style="margin-left:36.0pt">If we use the shortcut notification, in the Aodh notifier plugin, maybe we need to create aodh alarm with 'alarm_actions'.<o:p></o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p><span style="font-family:"Calibri",sans-serif">[Ifat] The Aodh plugin is defined as a POC, and is not very usable. We have discussed with the Aodh team possible enhancements (like adding an “external/custon alarm” in Aodh) that will enable creating an Aodh
alarm from Vitrage, but we didn’t reach a clear conclusion. There are a few problems with the current implementation, related to the facts that the event-alarm does not exactly suit the use case; and that Vitrage may raise the same alarm several times for
different instances. If you chose the shortcut strategy, we will have to open this discussion again.<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif">Having that said, I believe that the shortcut strategy is much better for Vitrage. While on the conservative strategy we can support notifications to Nova, in the shortcut strategy we can write the Aodh plugin
once and support all kinds of notifications (to Nova, Neutron, Heat or even external components) with no additional effort.
<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p style="margin-left:36.0pt">Correct me if I miss something.<o:p></o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p style="margin-left:36.0pt">[1]. <a href="https://github.com/openstack/vitrage/blob/master/etc/vitrage/templates.sample/host_down_scenarios.yaml">
https://github.com/openstack/vitrage/blob/master/etc/vitrage/templates.sample/host_down_scenarios.yaml</a><o:p></o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p style="margin-left:36.0pt">BR,<o:p></o:p></p>
<p style="margin-left:36.0pt">dwj<o:p></o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
<p style="margin-left:36.0pt"><o:p> </o:p></p>
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