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@YourTwitterHandle #DevoxxPL From Java through Cloud to the Edge Simplifying Kubernetes with Functional Programming and Immutability grzegorzrozniecki Grzegorz Rożniecki

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Functional programming Cloud and Edge Table of contents 01 04 02 05 03 06 DevOps Kubernetes GitOps and IaC Conclusion

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Nolan movies 00

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2014 Time travel

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Functional programming, immutability & Java 01

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Leap of faith

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The DevOps Movement 02

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Do I trust DevOps?

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Kubernetes (and containers) 03

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Docker

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Try it

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Kubernetes declarative API & manifests

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Cloud and Edge 04

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IaC and GitOps 05

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Configuration management tools IaC?

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Configuration management tools… in the cloud? API

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Terraform

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Terraform

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3. Pulled Automatically OpenGitOps.dev A system managed by GitOps must have its desired state expressed declaratively. Desired state is stored in a way that enforces immutability, versioning and retains a complete version history. Software agents automatically pull the desired state declarations from the source. Software agents automatically pull the desired state declarations from the source. 1. Declarative 2. Versioned and Immutable 4. Continuously Reconciled

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Crossplane

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Crossplane

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Possible?

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Putting it together 06

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Kubernetes on edge server

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Immutable

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Container-based

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Declarative

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Encrypted

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Two node HA

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Good night

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2014 Subtitle

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Links ● Foo Resources

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From Java through Cloud to the Edge Simplifying Kubernetes with Functional Programming and Immutability