Kubernetes Basics Pods Services and Deployments

Core Kubernetes Concepts

Understanding Pods, Services, and Deployments is essential for working with Kubernetes on your Breeze. These three resources form the foundation of every Kubernetes workload.

Pods

A Pod is the smallest deployable unit in Kubernetes. It wraps one or more containers that share networking and storage.

apiVersion: v1
kind: Pod
metadata:
  name: my-app
spec:
  containers:
    - name: app
      image: nginx:alpine
      ports:
        - containerPort: 80

kubectl apply -f pod.yaml
kubectl get pods
kubectl logs my-app

Deployments

A Deployment manages a set of identical Pods and handles rolling updates and rollbacks.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
        - name: app
          image: nginx:alpine
          ports:
            - containerPort: 80

kubectl apply -f deployment.yaml
kubectl get deployments
kubectl rollout status deployment/my-app

Services

A Service provides stable networking to a set of Pods selected by labels.

apiVersion: v1
kind: Service
metadata:
  name: my-app-svc
spec:
  selector:
    app: my-app
  ports:
    - port: 80
      targetPort: 80
  type: ClusterIP

Service Types

• ClusterIP — internal access only (default)
• NodePort — exposes on a static port on each node
• LoadBalancer — provisions an external load balancer

These three building blocks let you run, scale, and expose applications on your Breeze.