stabenfeldt/k8s-colors

Example Rails app running with PostgreSQL at GCP with Kubernetes

README

Running the app locally

docker-compose up -d
docker-compose exec colors rake db:create db:migrate
open http://localhost:3000

Building and pushing the image to remote repository

docker build . -t stabenfeldt/colors:latest
docker push stabenfeldt/colors:latest

Create a GCP cluster

gcloud container clusters create color-cluster --num-nodes=2

Setup PostgreSQL at GCP

Follow instructions in https://cloud.google.com/sql/docs/postgres/connect-kubernetes-engine?authuser=1 Update your config/database.yml and k8s/colors.yml with these values.

Deploy your app

export PROJECT_ID="your-project-id"
./update-vars-and-run.sh
kubectl get pods

	NAME                    READY     STATUS    RESTARTS   AGE
	colors-d9f744dc-8svw5   2/2       Running   0          58m
	colors-d9f744dc-bpwzm   2/2       Running   0          58m

kubectl logs colors-d9f744dc-8svw5 -c colors
	=> Booting Puma
	=> Rails 5.2.0 application starting in development
	=> Run `rails server -h` for more startup options
	Puma starting in single mode...
	* Version 3.11.4 (ruby 2.4.4-p296), codename: Love Song
	* Min threads: 5, max threads: 5
	* Environment: development
	* Listening on tcp://0.0.0.0:3000

Connect to your Rails app

First, check what your external IP is:

kubectl get svc
NAME         TYPE           CLUSTER-IP      EXTERNAL-IP      PORT(S)        AGE
colors       LoadBalancer   10.55.245.192   35.228.111.217   80:30746/TCP   1h
kubernetes   ClusterIP      10.55.240.1     <none>           443/TCP        1h

curl 35.228.111.217 # => No response! :-/

Why will it not