2019-04-10 APR

Kubernetes

"Minikube" - run entire kubernetes cluster on local machine; used mostly for training

https://kubernetes.io/docs/setup/minikube/

Installing & getting started: https://www.youtube.com/watch?v=0rZcYXtbGpc

Instructions for install: https://kubernetes.io/docs/tasks/tools/install-minikube
- Overview: Install Virtualization Platform (VirtualBox, Hyper-V, or VMWare Fusion), KubeCTL, Minikube.
- On a Mac:
  - Install Docker (can use GUI installer for Docker Desktop or issue "brew install docker")
  - Install Virtualization software - VirtualBox or VMWare Fusion
  - Terminal commands:
    - brew install kubernetes-cli
    - brew cask install minikube
    - minikube start
- On Linux: (see video above)
- On Windows:
  - Another resource: https://coding-stream-of-consciousness.com/2018/11/08/installing-minikube-on-windows-10/
Getting started with Minikube: https://kubernetes.io/docs/setup/minikube/#quickstart
- kubectl run hello-minikube --image=k8s.gcr.io/echoserver:1.10 --port=8080
- kubectl expose deployment hello-minikube --type=NodePort
- kubectl get pod
- curl $(minikube service hello-minikube --url)

Example Output:

Hostname: hello-minikube-56cdb79778-vqj5cPod Information:-no pod information available-Server values:server_version=nginx: 1.13.3 - lua: 10008Request Information:client_address=172.17.0.1method=GETreal path=/query=request_version=1.1request_scheme=httprequest_uri=http://192.168.99.100:8080/Request Headers:accept=*/*host=192.168.99.100:32619user-agent=curl/7.61.1Request Body:-no body in request-

Problems we experienced - mostly "minikube start" issues

"failed to create host-only adapter" - Bill (Mac), may be due to conflicting VirtualBox versions
slow download speeds for...
- "minikube iso" - Tony (Mac)
- "kubelet" - Steve (Linux)
Lesson learned: not a good idea to get started on a Virtual Machine. Will likely require configuration of "nested virtualization."

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