Plain old Docker is so 2016, Intro to Kubernetes

Kubernetes is quickly becoming one of the most popular ways to coordinate and deploy Docker containers in production. Come learn what Kubernetes is all about! I'll walk you through some core concepts, delve into expressing Kubernetes objects via YAML files, and finish up by deploying some apps live. Kubernetes (aka 'kube control' aka 'kube cuttle' aka 'pod gang') isn't just for DevOps.

Transcript

1. Plain old Docker is so 2016 Intro to Kubernetes Terri Chu
2. A little about me Then Pompano Beach, FL Now Atlanta, GA By Day Software Engineer @ Airbus Aerial By Night Android Developer Crafting Bull Terriers Bowling Drawing Cooking Travel
3. Topics Docker Why Kubernetes Kubernetes Live demo Questions
4. Docker ➔ Easily build and distribute your application in an isolated environment called a container ➔ Run many containers on a single host ➔ Containers are built by running a Docker image ➔ Instructions to build images are defined in a Dockerfile
5. Docker
6. Dockerfile example FROM nginx:mainline-alpine RUN rm /etc/nginx/conf.d/* ADD nginx.conf /etc/nginx/conf.d/ ADD index.html /var/www/example-docker/index.html
7. Demo
8. Moving code to production got a little easier.
9. That was great, like 2 years ago...
10. 100% Number of applications that have defects in production.
11. Kubernetes • Released 2014 • Container focused management environment • What is Kubernetes great at? ◦ Scheduling software running in containers ◦ Automated scaling to meet increase user demand ◦ Keeping software in line when it uses too many resources
12. Kubernetes Architecture Source: https://medium.com/@tsuyoshiushio/kubernetes-in-three-diagrams-6aba8432541c
13. Kubernetes Architecture Source: https://medium.com/@tsuyoshiushio/kubernetes-in-three-diagrams-6aba8432541c
14. Kubernetes Terminology Cluster Collection of Master and Nodes. Master Coordinates the cluster. Nodes Workers that run the applications. Can be physical or virtual machines. Source: https://kubernetes.io/docs/tutorials/kubernetes-basics/create-cluster/cluster-intro/
15. Kubernetes Terminology Continued Kubectl (aka Kubernetes control, kube control, kube cuttle) Interacts with Kubernetes cluster using Kubernetes API. Command line interface (CLI) Kubernetes Dashboard Interacts with Kubernetes cluster via Web UI. Good for when you are first learning!! (get it working with Docker for Mac) https://medium.com/@thms.hmm/docker-for-mac-with-kubernetes- enable-k8s-dashboard-62fe036b7480
16. Kubernetes Terminology Continued Deployment Instructions for creating/updating applications in the cluster. References Docker Images. Pod Collection of containers - treated as a single application. Service Basic internal load balancer for pod networking. Expose multiple pods as a single end point.
17. Kubernetes Deployment File Example apiVersion: apps/v1 kind: Deployment metadata: name: nginx-example labels: app: nginx-hello-world spec: replicas: 2 selector: matchLabels: app: nginx-hello-world template: metadata: labels: app: nginx-hello-world spec: containers: - name: nginx image: violetaria/docker-example ports: - containerPort: 80
18. Demo
19. Kubernetes Service File Example kind: Service apiVersion: v1 metadata: name: nginx-service spec: selector: app: nginx-hello-world ports: - protocol: TCP port: 8888 targetPort: 80
20. Demo
21. Resources for learning Docker CE OR Minikube https://medium.com/@thms.hmm/docker-for-mac-with-kubernetes-enable-k8s-dashboa rd-62fe036b7480 https://kubernetes.io/docs/tutorials/kubernetes-basics/#basics-modules https://www.katacoda.com/courses/kubernetes/playground https://labs.play-with-k8s.com/
22. Questions Thanks for inviting me to speak!