<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">For realizing auto HA function, we need monitoring service like ceilometer.</span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">Ceilometer monitors status of compute nodes ( network interface..connection, healthcheck,,etc,,)</span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">What I focus on is that this operation goes on automatically.</span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">Nova expose auto ha API. When nova received a auto api call. VMs automatically migrate to auto ha host.( which is extra compute node for only auto ha)</span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">All of information of auto ha is stored in auto_ha_hosts table.<br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">In this tables, used column of auto ha hosts is changed to true</span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">Administrator check broken compute node and fix( or replace ) the compute node.</span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">After fixing the compute node, VMs is migrating to operating compute nodes. Now auto ha host is empty again.<br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">When the number of runnning VMs in the auto ha host is zero, used column is replaced to false for using again by periodic task.</span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">Combination with monitoring service is important. Howerver in this blueprint, I want to realize nova's auto ha operation.</span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">My wiki page is still building now, I will fill out as soon as possbile.</span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"><br style="margin: 0px; padding: 0px; "></span></div><div style="margin: 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);">I am expecting your advices . Thank you very much~!</span></div><p style="margin: 0.7em 0px; padding: 0px; "><span style="-webkit-text-size-adjust: auto; background-color: rgba(255, 255, 255, 0);"> </span></p><div style="-webkit-text-size-adjust: auto; "><br></div><br><span style="-webkit-text-size-adjust: auto;">Sent from my iPad</span></div><div style="-webkit-text-size-adjust: auto; "><br>On 2013. 8. 13., at 오후 8:01, balaji patnala <<a href="mailto:patnala003@gmail.com">patnala003@gmail.com</a>> wrote:<br><br></div><blockquote type="cite" style="-webkit-text-size-adjust: auto; "><div>Potential candidate as new service like Ceilometer, Heat etc for OpenStack and provide High Availability of VMs. Good topic to discuss at Summit for implementation post Havana Release. <br><br>
<div class="gmail_quote">On Tue, Aug 13, 2013 at 12:03 PM, Alex Glikson <span dir="ltr"><<a href="mailto:GLIKSON@il.ibm.com" target="_blank">GLIKSON@il.ibm.com</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PADDING-LEFT:1ex" class="gmail_quote"><font face="sans-serif">Agree. Some enhancements to Nova might be still required (e.g., to handle resource reservations, so that there is enough capacity), but the end-to-end framework probably should be outside of existing services, probably talking to Nova, Ceilometer and potentially other components (maybe Cinder, Neutron, Ironic), and 'orchestrating' failure detection, fencing and recovery.</font> <br>
<font face="sans-serif">Probably worth a discussion at the upcoming summit.</font> <br><br><br><font face="sans-serif">Regards,</font> <br><font face="sans-serif">Alex</font> <br><br><br><br><font color="#5f5f5f" size="1" face="sans-serif">From: </font><font size="1" face="sans-serif">Konglingxian <<a href="mailto:konglingxian@huawei.com" target="_blank">konglingxian@huawei.com</a>></font> <br>
<font color="#5f5f5f" size="1" face="sans-serif">To: </font><font size="1" face="sans-serif">OpenStack Development Mailing List <<a href="mailto:openstack-dev@lists.openstack.org" target="_blank">openstack-dev@lists.openstack.org</a>>, </font><br>
<font color="#5f5f5f" size="1" face="sans-serif">Date: </font><font size="1" face="sans-serif">13/08/2013 07:07 AM</font> <br><font color="#5f5f5f" size="1" face="sans-serif">Subject: </font><font size="1" face="sans-serif">[openstack-dev] 答复: Proposal for approving Auto HA development blueprint.</font> <br>
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<div class="h5"><br><br><br><font color="#004080" size="3" face="Calibri">Hi yongiman:</font> <br><font color="#004080" size="3" face="Calibri"> </font> <br><font color="#004080" size="3" face="Calibri">Your idea is good, but I think the auto HA operation is not OpenStack’s business. IMO, Ceilometer offers ‘monitoring’, Nova offers ‘evacuation’, and you can combine them to realize HA operation.</font> <br>
<font color="#004080" size="3" face="Calibri"> </font> <br><font color="#004080" size="3" face="Calibri">So, I’m afraid I can’t understand the specific implementation details very well.</font> <br><font color="#004080" size="3" face="Calibri"> </font> <br>
<font color="#004080" size="3" face="Calibri">Any different opinions?</font> <br><font color="#004080" size="3" face="Calibri"> </font> <br><font><b>发件人:</b> <a href="mailto:yongiman@gmail.com" target="_blank">yongiman@gmail.com</a> [</font><a href="mailto:yongiman@gmail.com" target="_blank"><font>mailto:yongiman@gmail.com</font></a><font>] <b><br>
发送时间:</b> 2013年8月12日 20:52<b><br>收件人:</b> <a href="mailto:openstack-dev@lists.openstack.org" target="_blank">openstack-dev@lists.openstack.org</a><b><br>主题:</b> Re: [openstack-dev] Proposal for approving Auto HA development blueprint.</font> <br>
<font size="3"> </font> <br><font size="3"> </font> <br><font size="3"> </font> <br><font size="3">Hi,</font> <br><font size="3"> </font> <br><font size="3">Now, I am developing auto ha operation for vm high availability.</font> <br>
<font size="3"> </font> <br><font size="3">This function is all progress automatically.</font> <br><font size="3"> </font> <br><font size="3">It needs other service like ceilometer.</font> <br><font size="3"> </font> <br>
<font size="3">ceilometer monitors compute nodes.</font> <br><font size="3"> </font> <br><font size="3">When ceilometer detects broken compute node, it send a api call to Nova, </font><br><font size="3">nova exposes for auto ha API.</font> <br>
<font size="3"> </font> <br><font size="3">When received auto ha call, nova progress auto ha operation.</font> <br><font size="3"> </font> <br><font size="3">All auto ha enabled VM where are running on broken host are all migrated to auto ha Host which is extra compute node for using only Auto-HA function.</font> <br>
<font size="3"> </font> <br><font size="3">Below is my blueprint and wiki page.</font> <br><font size="3"> </font> <br><font size="3">Wiki page is not yet completed. Now I am adding lots of information for this function.</font> <br>
<font size="3"> </font> <br><font size="3">Thanks</font> <br><font size="3"> </font> <br><a href="https://blueprints.launchpad.net/nova/+spec/vm-auto-ha-when-host-broken" target="_blank"><font color="blue" size="3"><u>https://blueprints.launchpad.net/nova/+spec/vm-auto-ha-when-host-broken</u></font></a> <br>
<font size="3"> </font> <br></div></div><a href="https://wiki.openstack.org/wiki/Autoha" target="_blank"><font color="blue" size="3"><u>https://wiki.openstack.org/wiki/Autoha</u></font></a><tt><font>_______________________________________________<br>
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