<div dir="ltr">Hi Jean-Philippe,<div><br></div><div>we had the same issue with ceph as backend. This fixed the problem in our setup:<div><a href="https://ask.openstack.org/en/question/87545/cinder-high-availability/">https://ask.openstack.org/en/question/87545/cinder-high-availability/</a><br></div></div><div><br></div><div>Although the above link talks about an active-active setup, the official docs mention the hostname in the configuration also for an active-passive setup:</div><div><a href="https://docs.openstack.org/ha-guide/storage-ha-block.html#configure-block-storage-api-service">https://docs.openstack.org/ha-guide/storage-ha-block.html#configure-block-storage-api-service</a><br></div><div><br></div><div>regards</div><div>Christian Zunker</div></div><br><div class="gmail_quote"><div dir="ltr">Jean-Philippe Méthot <<a href="mailto:jp.methot@planethoster.info">jp.methot@planethoster.info</a>> schrieb am Fr., 6. Juli 2018 um 07:11 Uhr:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space">Hi,<div><br></div><div>We’ve been running on Openstack for several years now and our setup has always counted a single controller. We are currently testing switching to a dual controller HA solution, but an unexpected issue has appeared, regarding storage. See, we use Dell compellent SAN for our block devices. I notice that when I create a volume on one controller, I am unable to make any operation on the same volume on the second controller (this is with an active/passive cinder-volume). Worse, this affects VMs directly as they can’t be migrated if the active controller isn’t the one that created their block device.</div><div><br></div><div>I know this issue doesn’t happen on Ceph, so I’ve been wondering, is this a limitation of Openstack or the SAN driver? Also, is there actually a way to reach even active-passive high availability with this current storage solution?</div><div><br></div><div><br><div>
<div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Jean-Philippe Méthot</div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Openstack system administrator</div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">Administrateur système Openstack</div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">PlanetHoster inc.</div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br></div><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br></div><br class="m_-8049839941525710332Apple-interchange-newline">
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