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<p class="MsoNormal">Hi, <span lang="EN-GB">Raghavendra,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Just sharing my experience, I started working on A/A support for NetApp NFS driver, and I followed the same steps you summarized.<o:p></o:p></span></p>
<p class="MsoNormal">Besides that, I think the effort is to understand/test if any of the driver features might break in the A/A environment.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If anyone knows about anything else we should test, I would be happy to know too.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Nahim Souza.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> U T, Raghavendra <raghavendra-uddhav.tilay@hpe.com>
<br>
<b>Sent:</b> Monday, May 8, 2023 09:18<br>
<b>To:</b> openstack-discuss@lists.openstack.org<br>
<b>Subject:</b> [cinder][dev] Add support in driver - Active/Active High Availability<o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-GB">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">We wish to add Active/Active High Availability to:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">1] HPE 3par driver - cinder/cinder/volume/drivers/hpe/hpe_3par_common.py<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">2] Nimble driver - cinder/cinder/volume/drivers/hpe/nimble.py<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Checked documentation at<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><a href="https://docs.openstack.org/cinder/latest/contributor/high_availability.html">https://docs.openstack.org/cinder/latest/contributor/high_availability.html</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><a href="https://docs.openstack.org/cinder/latest/contributor/high_availability.html#cinder-volume">https://docs.openstack.org/cinder/latest/contributor/high_availability.html#cinder-volume</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><a href="https://docs.openstack.org/cinder/latest/contributor/high_availability.html#enabling-active-active-on-drivers">https://docs.openstack.org/cinder/latest/contributor/high_availability.html#enabling-active-active-on-drivers</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Summary of steps:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">1] In driver code, set SUPPORTS_ACTIVE_ACTIVE = True<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">2] Split the method failover_host() into two methods: failover() and failover_completed()<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">3] In cinder.conf, specify cluster name in [DEFAULT] section<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">cluster = <cluster_name><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">4] Configure atleast two nodes in HA and perform testing<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Is this sufficient or anything else required ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Note: For Nimble driver, replication feature is not yet added.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">So can the above step 2 be skipped?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Appreciate any suggestions / pointers.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Raghavendra Tilay.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
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