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Kim Schlesinger, DigitalOcean Beyond Block Diagrams: Different Ways of Understanding K8s Architecture

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Hi, I’m Kim Developer Advocate Site Reliability Engineer JavaScript Developer Elementary School Teacher 2018 @kimschles Beyond Block Diagrams

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Cloud Native Generation Photo source: https://unsplash.com/photos/8iZG31eXkks @kimschles Beyond Block Diagrams

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“Any framework that you can hold as a mental representation of an external reality.” - What is a mental model? by Julia Clavien Mental Models Photo source: https://unsplash.com/photos/3KGF9R_0oHs @kimschles Beyond Block Diagrams

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From the Kubernetes Documentation, Kubernetes Components: https://kubernetes.io/docs/concepts/overview/components/ @kimschles Beyond Block Diagrams

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Hire, train and retain early-career engineers with limited computing experience Why? @kimschles Beyond Block Diagrams

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Takeaways 1. Create diagrams that show the passage of time 2. Use distributed tracing technology as a learning tool 3. Build 3D models of Kubernetes clusters Photo source: https://unsplash.com/photos/_gEKtyIbRSM @kimschles Beyond Block Diagrams

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Agenda 1. Time Sequence Diagram 2. Distributed Traces + Diagram 3. 3D Model @kimschles Beyond Block Diagrams

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Agenda 1. Time Sequence Diagram 2. Distributed Traces + Diagram 3. 3D Model @kimschles Beyond Block Diagrams

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Example Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model @kimschles Beyond Block Diagrams

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kubectl create -f pod.yaml Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model @kimschles Beyond Block Diagrams

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Time Sequence Diagram @kimschles Beyond Block Diagrams

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Agenda 1. Time Sequence Diagram 2. Distributed Traces + Diagram 3. 3D Model @kimschles Beyond Block Diagrams

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Agenda 1. Time Sequence Diagram 2. Distributed Traces + Diagram 3. 3D Model @kimschles Beyond Block Diagrams

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Distributed Tracing “Distributed tracing, also called distributed request tracing, is a method used to profile and monitor applications, especially those built using a microservices architecture.” - OpenTracing Project Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model @kimschles Beyond Block Diagrams

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Meow-Micro 🐈 ● 2 go microservices ● The meow-client accepts requests via a REST API and uses GRPC to communicate with the meow-server ● Fernando Diaz at GitLab Example Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model @kimschles Beyond Block Diagrams

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curl http://143.244.209.228/meow -X POST -d '{"name": "Meow-Mixer"}' Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model @kimschles Beyond Block Diagrams

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@kimschles Beyond Block Diagrams From Setting up Distributed Tracing with OpenTelemetry & Jaeger in Kubernetes Ingress-NGINX by Fernando Diaz Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model

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Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model @kimschles From Setting up Distributed Tracing with OpenTelemetry & Jaeger in Kubernetes Ingress-NGINX by Fernando Diaz Beyond Block Diagrams

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@kimschles Beyond Block Diagrams Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model

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@kimschles Beyond Block Diagrams Weaveworks kspan Example: rollout of a Deployment of two Pods From weaveworks-experiments/kspan: Turning Kubernetes Events into spans

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Agenda 1. Time Sequence Diagram 2. Distributed Traces + Diagram 3. 3D Model @kimschles Beyond Block Diagrams

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Agenda 1. Time Sequence Diagram 2. Distributed Traces + Diagram 3. 3D Model @kimschles Beyond Block Diagrams

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Example Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model @kimschles Beyond Block Diagrams

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kubectl create -f pod.yaml Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model @kimschles Beyond Block Diagrams

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Time Sequence Diagram | Distributed Tracing + Diagram | 3D Model @kimschles Beyond Block Diagrams

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Agenda 1. Time Sequence Diagram 2. Distributed Traces + Diagram 3. 3D Model @kimschles Beyond Block Diagrams

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@kimschles Beyond Block Diagrams Recap

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“Any framework that you can hold as a mental representation of an external reality.” - What is a mental model? by Julia Clavien Mental Models Photo source: https://unsplash.com/photos/3KGF9R_0oHs @kimschles Beyond Block Diagrams

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Cloud Native Generation Photo source: https://unsplash.com/photos/8iZG31eXkks @kimschles Beyond Block Diagrams

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From the Kubernetes Documentation, Kubernetes Components: https://kubernetes.io/docs/concepts/overview/components/ @kimschles Beyond Block Diagrams

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Takeaways 1. Create diagrams that show the passage of time 2. Use distributed tracing technology as a learning tool 3. Build 3D models of Kubernetes clusters Photo source: https://unsplash.com/photos/_gEKtyIbRSM @kimschles Beyond Block Diagrams

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Hire, train and retain early-career engineers with limited computing experience Why? @kimschles Beyond Block Diagrams

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Resources Examples of Kubernetes Time Sequence Diagrams ● Writing custom Kubernetes Scheduler - My Fake Tardis ● A Sequential Breakdown of the Kubernetes Deployment Process- ContainerLabs Time Sequence Diagram Generator ● SequenceDiagram.org - UML Sequence Diagram Online Tool @kimschles Beyond Block Diagrams

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Resources Distributed Tracing with Jaeger and ingress-nginx ● Jaeger: open source, end-to-end distributed tracing ● OpenTracing - NGINX Ingress Controller Tutorial ● Setting up Distributed Tracing in Kubernetes with OpenTracing, Jaeger, and Ingress-NGINX by Fernando Diaz, @awkwardferny Diagram Tool ● LucidChart @kimschles Beyond Block Diagrams

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Resources kspan ● Traces from Events: A New Way to Visualise Kubernetes Activities - Bryan Boreham ● weaveworks-experiments/kspan: Turning Kubernetes Events into spans @kimschles Beyond Block Diagrams

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@kimschles

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