Hi OpenStackers, I'm planning upgrading my OpenStack System. Currently version is Mitaka, on Ubuntu 14.04.5. I want to upgrade to latest version of Pike.
I've read some documents and know that Mitaka does not have Rolling upgrade, which means there will have downtime in upgrade process. Our system has 3 HA Controllers, all VMs and Storage were put in Ceph. At the moment, I can list some step-by-step to upgrade: 1. Upgrade OS to Ubuntu16.04 2. Upgrage package in order: Mitaka -> Newton -> Ocata -> Pike 3. Upgrade DB in order: Mitaka -> Newton -> Ocata -> Pike Do I lack any step? Could you guys share me some experiences fulfil solution, to reduce maximum downtime of system? Thanks in advance.
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