Imperative, Declarative and Kubernetes

Slides for the talk "Imperative, Declarative and Kubernetes" given at Kubernetes Community Days, Bengaluru 2021.

Transcript

1. Imperative, Declarative and Kubernetes Madhav Jivrajani, PES University
2. Outline • What even is Kubernetes? • Imperative and Declarative Systems • Formalizing things a little • Demo • Mapping to Kubernetes • Let’s take a step back and review • References and Resources
3. What even is this thing called Kubernetes?
4. What even is this thing called Kubernetes? “Kubernetes is a portable, extensible, open-source platform for managing containerized workloads and services, that facilitates both declarative configuration and automation.” https://kubernetes.io/docs/concepts/overview/what-is-kubernetes/
5. What even is this thing called Kubernetes? “Kubernetes is a portable, extensible, open-source platform for managing containerized workloads and services, that facilitates both declarative configuration and automation.” https://kubernetes.io/docs/concepts/overview/what-is-kubernetes/
11. Is it really an ‘either ___ or ___’ type of situation?
12. Is it really an ‘either ___ or ___’ type of situation? No.
15. Let’s formalize things juuuuuust a little bit.
30. Demo
33. Let’s dive a little deeper into how Kubernetes does things using these concepts.
58. What if...
63. Aha! But what if...
87. So, let’s ask ourselves again
88. What even is this thing called Kubernetes?
89. What even is this thing called Kubernetes? “Kubernetes is a portable, extensible, open-source platform for managing containerized workloads and services, that facilitates both declarative configuration and automation.” https://kubernetes.io/docs/concepts/overview/what-is-kubernetes/
90. What even is this thing called Kubernetes? “Kubernetes is a portable, extensible, open-source platform for managing containerized workloads and services, that facilitates both declarative configuration and automation.” https://kubernetes.io/docs/concepts/overview/what-is-kubernetes/
91. References and Resources • Kubernetes Design Principles - Understanding The Why • The Magic of Kubernetes Self-Healing Capabilities • Imperative vs Declarative • Deep Dive into Kubernetes Internals for Builders and Operators • What Happens When K8s • Kubernetes Design Proposals (PLEG) • The Kubernetes Control Plane for Busy People Who Like Pictures • Kubernetes-style APIs of the Future
92. Slides and Source Code github.com/MadhavJivrajani/kcdctl
93. Thank you! Twitter: @MadhavJivrajani GitHub: github.com/MadhavJivrajani K8s slack (slack.k8s.io): @madhav