The bumpy road towards containerised microservices: why early adoption meant it took longer for us to get there

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The Bumpy Road Towards Containerised Microservices: Why Early Adoption Meant It Took Longer For Us To Get There @nickywrightson nicky.wrightson@ft.com

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@nickywrightson Nicky Wrightson Principal Engineer & Tech Lead @ FT

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@nickywrightson

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https://six-degrees.ft.com/ @nickywrightson

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https://www.ft.com The news business has changed a lot in the last 130 years

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Over 200 services … In two regions … All containerised … Running on Kubernetes @nickywrightson

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2. A meandering journey 3. Where we are now? 1. Why we chose containers 4. What’s next?

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1. Why we chose containers

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Over 200 services … In two regions … ~550 VMs @nickywrightson

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https://www.ﬂickr.com/photos/bluesquarething/5165177846 We realised that we needed to look at containered solutions

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We could reduce costs by ~ 80% using containers @nickywrightson

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What about serverless? @nickywrightson

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2. A meandering journey 1. Why we chose containers

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3 and half years ago we started a proof of concept

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Java service:  9k Requests Simple JSON manipulation 340MB Go service:  40k Requests Database query + manipulation 12MB @nickywrightson

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@nickywrightson

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Content in Containers == CoCo @nickywrightson

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Containerise every service @nickywrightson

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Monitoring @nickywrightson

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Change database and programming language at the same time!!

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It was not all plain sailing @nickywrightson

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Stateful services do not play nice @nickywrightson

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“We need a bigger boat” Richard Dreyfus in Jaws (1975) Image: http://goo.gl/4r26gS

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We kept losing our live clusters

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@nickywrightson

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@nickywrightson

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Monitor and react at the right levels

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Metrics Dashboards for health

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React quickly to security patching @nickywrightson

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Deployment needs to be automated, consistent, repeatable and have the ability to be rolled back @nickywrightson

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@nickywrightson

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Massive shift in operational thinking @nickywrightson

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If it is hard do it more often If it is really hard automate it! @nickywrightson

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@nickywrightson

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https://coreos.com/blog/migrating-from-ﬂeet-to-kubernetes.html

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@nickywrightson

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How to iterate on 200 services at the same time? @nickywrightson

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Photo by chuttersnap on Unsplash @nickywrightson You rarely get it right the ﬁrst time

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“Stateful services are painful to containerise” Nicky Wrightson January 2016

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2. A meandering journey 1. Why we chose containers 3. Where we are now?

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What did our containerisation journey give us? @nickywrightson

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@nickywrightson

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Operationally supportable @nickywrightson

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Kubernetes will ﬁx that …. @nickywrightson

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Deployments are more graceful @nickywrightson

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2. A meandering journey 1. Why we chose containers 3. Beneﬁts to us now? 4. What’s next?

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Enhance our initial approach

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@nickywrightson

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Get someone else to do the heavy lifting @nickywrightson

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One cluster to rule them all … @nickywrightson

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Federation

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In Conclusion … @nickywrightson

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Hindsight is always 20:20 Photo by NeONBRAND on Unsplash

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Spend your innovation tokens wisely http://mcfunley.com/choose-boring-technology Photo by rawpixel on Unsplash

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@nickywrightson nicky.wrightson@ft.com Thanks