<div dir="auto"><div><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi OpenStackers,<div><br></div><div>I'm planning upgrading my OpenStack System. Currently version is Mitaka, on Ubuntu 14.04.5.</div><div>I want to upgrade to latest version of Pike.</div><div><br></div><div>I've read some documents and know that Mitaka does not have Rolling upgrade, which means there will have downtime in upgrade process.</div><div><br></div><div>Our system has 3 HA Controllers, all VMs and Storage were put in Ceph.</div><div><br></div><div>At the moment, I can list some step-by-step to upgrade:</div><div><ol><li>Upgrade OS to Ubuntu16.04</li><li>Upgrage package in order: Mitaka -> Newton -> Ocata -> Pike</li><li>Upgrade DB in order: Mitaka -> Newton -> Ocata -> Pike</li></ol><div>Do I lack any step? Could you guys share me some experiences fulfil solution, to reduce maximum downtime of system?</div></div><div><br></div><div>Thanks in advance.</div><div><br></div><div><br></div><div><br></div></div>
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