title	description
Kubernetes Services with YAML	Learn to write and test Kubernetes Services with YAML

Step-01: Introduction to Services

• We are going to look in to below two services in detail with a frotnend and backend example
  • LoadBalancer Service
  • ClusterIP Service

Step-02: Create Backend Deployment & Cluster IP Service

• Write the Deployment template for backend REST application.
• Write the Cluster IP service template for backend REST application.
• Important Notes:
  • Name of Cluster IP service should be name: my-backend-service because same is configured in frontend nginx reverse proxy default.conf.
  • Test with different name and understand the issue we face
  • We have also discussed about in our Section-12

# Change Directory
cd kube-manifests

# Deploy Backend Kubernetes Deployment and ClusterIP Service 
kubectl get all
kubectl apply -f 01-backend-deployment.yml -f 02-backend-clusterip-service.yml
kubectl get all

Step-03: Create Frontend Deployment & LoadBalancer Service

• Write the Deployment template for frontend Nginx Application
• Write the LoadBalancer service template for frontend Nginx Application

# Change Directory
cd kube-manifests

# Deploy Frontend Kubernetes Deployment and LoadBalancer Service 
kubectl get all
kubectl apply -f 03-frontend-deployment.yml -f 04-frontend-LoadBalancer-service.yml
kubectl get all

• Access REST Application

# Get Service IP
kubectl get svc

# Access REST Application 
http://<Load-Balancer-Service-IP>/hello
curl http://<Load-Balancer-Service-IP>/hello

Step-04: Delete & Recreate Objects using kubectl apply

Delete Objects (file by file)

# Change Directory 
cd kube-manifests/

# Delete Objects File by file
kubectl delete -f 01-backend-deployment.yml -f 02-backend-clusterip-service.yml -f 03-frontend-deployment.yml -f 04-frontend-LoadBalancer-service.yml
kubectl get all

Recreate Objects using YAML files in a folder

# Change Directory 
cd 17-yaml-declarative-k8s-services/

# Recreate Objects by referencing a folder
kubectl apply -f kube-manifests/
kubectl get all

Delete Objects using YAML files in folder

# Change Directory 
cd 17-yaml-declarative-k8s-services/

# Delete Objects by just referencing a folder
kubectl delete -f kube-manifests/
kubectl get all

Additional References - Use Label Selectors for get and delete

• Labels
• Labels-Selectors