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Lessons learned on upgrades: the importance of HA and automation
Emilien Macchi Software Engineer
Frédéric Lepied VP Software Engineering
- system upgrades: new kernel, core components needed by OpenStack (apache, HAproxy, etc).
- availability: your architecture has to remain available during the upgrade
- orchestration: reduce or avoid service downtime by orchestrating an upgrade in the smartest way
- scalability: the number of nodes to upgrades should not affect the time to upgrade (ie: packaging upgrade method is too slow at scale and consumes a lot more resources)
- reproduceability: be able to test the upgrade on another plateform before doing it in production
- Testing: before and after the upgrade it's crucialto validate that no regressions are occuring, and be able to track them in the worst case.
- why and how we use image-based deployments
- how an orchestrated upgrade works
- how to prepare the orchestration
- and learn from our experience which is building against past mistakes that we would love you to avoid
Emilien is a french citizen based in Montreal, Canada.
Joining eNovance by October 2012 as an Software Engineer, his main role and day to day job is to integrate OpenStack clouds for customers by dealing with automation.
He has been involved in the OpenStack Community since October 2011 as a documentation writter, blogger and code-tester. He is also used to perform presentations and workshops related to OpenStack. Before eNovance, Emilien was working as an OpenStack R&D Engineer at StackOps (Spain) and before working on OpenStack, he was System Administrator for the French Air Force and used to work for UN & NATO around the world.
Frédéric Lepied is eNovance's VP of Software Engineering. He has been involved with the Open Source movement since 1996. Contributing to Debian and XFree86, then becoming CTO for MandrakeSoft/Mandriva. He has worked as a senior engineer at Intel and as a senior architect at CISCO/NDS. He has also been involved in other ventures: a startup in hardware design, Splitted-Desktop Systems and a security company, Wallix.