August 12: Docker & Kubernetes Part 2

[iennae]

Last week we started talking about kubernetes. We started talking about pods, and started modifying our hello world to be deployed into kubernetes. We wrote a Dockerfile and created a "/" interface to do a health check.

Project: https://github.com/osscda/cloud-native-project/

Agenda

This week we will continue our adventures learning about kubernetes and updating our application to be deployed.

Links

• https://azure.microsoft.com/en-us/services/kubernetes-service/
• https://hub.docker.com/r/arschles/dapr-hello-world

Concepts

Kubernetes

• pods
• deployments
• resources
• replicaset
• services
• port space

Commands

kubectl get nodes
kubectl get pods
kubectl create deployment hello-node --image=arschles/dapr-hello-world
kubectl get deployments
kubectl delete pod PODNAME
kubectl delete deployment DEPLOYMENTNAME
kubectl get events
kubectl scale --replicas=50 deployment/hello-node
kubectl expose deployment DEPLOYMENTNAME --type=LoadBalancer --port=3000
kubectl get service

Rules of the Stream

• Comments and questions are always welcome in the chat.
• No question is too basic or "stupid" to ask in the chat.
• Tangents are accepted!
• No sorries needed.
• Please submit issues for new topics of interest in our repo!

[iennae]

Question: pod names c4b477d78-X

[iennae]

What is reconciliation code

[arschles]

For next week, let's talk about pod lifecycle: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/

[iennae]

ICYMI (Aaron): https://helm.sh/