Setting up sample-springboot-app

1. Install the repo on your local by: git clone https://github.com/indervirbanipal/sample-springboot-app.git
2. Import the project in Intellij as a gradle project.
3. Go to command line (in app's home folder) and run: ./gradlew clean build
4. Look for ./build/libs/sample-springboot-app.war which gets generated.
5. The next step is to build a docker image. Do docker images to check the existing images on the system.
6. Run sh dockerCreate.sh to create the docker image.
7. You should see sample-springboot-app-image:latest under docker images.
8. Go to http://localhost:8080/ and enter paul_admin:123456 to see the app up and runnning.
9. Go to Postman at http://localhost:8080/ to see the app up and running.
10. Use sh dockerPush.sh to push to the repository you want to.
11. Use docker image rm <image-id> to remove the docker image from your local (see image-id from docker images).
12. Use sh dockerPull.sh to pull the image from the repository you want from.
13. See the image pulled from repo using docker images.

Setting up deployment (Kubernetes + Helm)

1. Install the required tools using brew install kubectl, brew cask install minikube, brew cask install virtualbox.
2. Run minikube start.
3. Run minikube config set vm-driver virtualbox.
4. Run kubectl config use-context minikube.
5. Run kubectl cluster-info. Make sure Kubernetes master is running at https://192.168.99.100:8443 . Checkout the url http://127.0.0.1:50413/api/v1/namespaces/kube-system/services/http:kubernetes-dashboard:/proxy/#!/overview?namespace=default
6. Push the image to minikube using docker save sample-springboot-app-image:latest | (eval $(minikube docker-env) && docker load)
7. Create deployment kubectl run sample-springboot-app-dep1 --image=sample-springboot-app-image:latest --image-pull-policy=IfNotPresent. Then check using kubectl get deployments >> shows sample-springboot-app-dep1 running.
8. Also, check through kubectl get pods. Check logs using kubectl logs <pod name> or just do kubectl get all or kubectl get all -o wide.
9. Expose the deployment as a service through kubectl expose deployment sample-springboot-app-dep1 --port=8080 --type=LoadBalancer --name=sample-springboot-app-serv1. service/sample-springboot-app-serv1 gets exposed.
10. kubectl get services should show sample-springboot-app-serv1 running.
11. Do minikube ip to check the IP and lets say you get 192.168.99.105. So, hit the url 192.168.99.105:30658 where 30658 is listed alongwith 8080 under kubectl get services for the current service.
12. Better way of managing distributed deployments - Helm! Install helm using brew install kubernetes-helm. Use kubectl config current-context to check if the current context is helm. Install tiller using helm init --history-max 200.
13. After tiller install, it can be verified by kubectl get pods --namespace kube-system | grep tiller.
14. Check the versions for the helm client and server using helm version.

Setting up and configuring database using Helm

1. Use helm install --name postgres1 stable/postgresql to install local postgres pods. You can verify if they are in the same namespace as the spring boot app using kubectl get pods --namespace default.