k8s-tutorial

This is my code for walking through the tutorials at https://kubernetes.io/docs/tutorials/ and elsewhere.

Setup

minikube start
make all
minikube service hello-node

Then, visit http://localhost:8080. It should display the text "Hello world".

Troubleshooting

minikube start

I installed kubectl and minikube through brew. When doing the Hello Minikube tutorial, minikube start complained about my kubectl version not being up-to-date. I installed through curl and got the most recent version.
When trying to run kubectl create deployment hello-node ..., the deployment would fail to pull from GCR with a "connection refused" error.
- I tried to docker pull the image directly and it succeeded.
- I noticed that when I do minikube start, I get this warning:

$ minikube start
😄  minikube v1.7.2 on Darwin 10.15.3
✨  Using the hyperkit driver based on existing profile
⌛  Reconfiguring existing host ...
🏃  Using the running hyperkit "minikube" VM ...
⚠️   Node may be unable to resolve external DNS records
⚠️   VM is unable to access k8s.gcr.io, you may need to configure a proxy or set --image-repository
🐳  Preparing Kubernetes v1.17.3 on Docker 19.03.6 ...
🚀  Launching Kubernetes ... 
🌟  Enabling addons: dashboard, default-storageclass, storage-provisioner
🏄  Done! kubectl is now configured to use "minikube"

I tried doing minikube start --vm-driver=vmware and that fixed it. I had to install the VMWare Minikube driver with brew install docker-machine-driver-vmware.

kubectl expose

I found that port 8080 was being used by nginx. I found and fixed this with

lsof -i :8080 # shows nginx
ps -x | grep nginx
kill # PID of nginx

Deploying a local Docker image

I tried to deploy with a Docker image I had built locally. kubectl create deployment wouldn't ever find the local image. I learned that Minikube actually runs in its own VM. kubectl is looking there, not on your local machine.