🔁 Learn KRM!

KRM = the Kubernetes Resource Model

☸️ What is KRM?

• Concepts - What is Kubernetes? - kubernetes.io
• Concepts - Kubernetes Components - kubernetes.io
• Concepts - Understanding Kubernetes Objects - kubernetes.io
• Concepts - Configuration Best Practices - kubernetes.io

🔎 Why adopt KRM?

• Blog post - “Why is Kubernetes getting so popular?” - Ricardo Aravena, StackOverflow
• Blog post - “Kubernetes Design and Development Explained” - Saad Ali, TheNewStack
• Blog post - “I do declare! Infrastructure automation with Configuration as Data” - Kelsey Hightower and Marc Balch, Google Cloud
• Blog post - “How GitOps and the KRM make multi-cloud less scary” - Richard Seroter, Google Cloud
• Video - Cloud Native Resource Management @ GCP Next ‘19 - Gregg Donovan, Michael Kibbe, Sonam Saxena (Google)

💻 Tools

• VSCode - YAML extension
• Google Cloud Code - Deploy Kubernetes YAML directly from an IDE
• kustomize: “kustomize lets you customize raw, template-free YAML files for multiple purposes, leaving the original YAML untouched and usable as is.”
• kpt: “a toolkit to help you manage, manipulate, customize, and apply Kubernetes Resource configuration data files”
• ConfigSync (Google Cloud) - sync KRM from Git repositories to GKE clusters
• Azure Service Operator for Kubernetes: “helps you provision Azure resources and connect your applications to them from within Kubernetes.”
• Google Cloud Config Connector: “a Kubernetes addon that allows you to manage Google Cloud resources through Kubernetes.”
• AWS Controllers for Kubernetes: “lets you define and use AWS service resources directly from Kubernetes.”
• OpenPolicyAgent: “an open source, general-purpose policy engine that unifies policy enforcement across the stack.” (see also: Gatekeeper)
• PolicyController (Google Cloud) - managed OPA Gatekeeper GKE Admission Controller (only allow compliant KRM into the cluster)
• gcloud resource-config bulk-export - export live Google Cloud object state to KRM files, for declarative management
• Crossplane - Open-source Kubernetes add-on for administering multi-cloud resources with KRM.

🛠 How-tos

• Blog Post - Introduction to YAML- Creating a Kubernetes deployment - Nick Chase, Mirantis
• Tutorial - Declarative Management of Kubernetes Objects Using Configuration Files - kubernetes.io
• KubeBuilder book - What is a Resource?
• Managing Resources - kubernetes.io
• Blog post - How To Manage Your Kubernetes Configurations with Kustomize - Jason Simmons, DigitalOcean
• Google Cloud Code - Working with Google Cloud Platform and Kubernetes YAML
• Solution Guide - Safe Rollouts with Anthos Config Management - Google Cloud
• Solution Guide - Best practices for policy management with Anthos Config Management and GitLab - Google Cloud
• Solution Guide - Validating apps against company policies in a CI pipeline - Google Cloud
• Solution Guide - Managing cloud infrastructure using kpt - Google Cloud
• Video - Using Source Code Management Patterns To Configure And Secure Your Kubernetes Clusters - Giovanni Galloro, Google

🌊 Deep Dives

• Extending the Kubernetes API with Custom Resources - kubernetes.io
• What is a Kubernetes operator? - RedHat
• Twitter - Kubernetes/Borg/Omega history + KRM - Brian Grant, Google
• GitHub - Architecture - the Kubernetes Resource Model - Brian Grant, Google
• GitHub - Declarative Application Management in Kubernetes - Brian Grant, Google