Creating Kubernetes pods, ReplicaSets, and deployments

This post is the 4th in our Kubernetes training series, providing DevOps engineers with an introduction to Docker, Kubernetes, and Octopus.

This video demonstrates Kubernetes pods, ReplicaSets, and deployments, deploying examples of each.

If you don't already have Octopus account, you can start a free trial.

You can work through the series using the links below.

• Getting started with Docker
• Installing a development Kubernetes cluster
• Creating Docker containers
• Creating Kubernetes resources
• Creating Kubernetes services
• Deploying to Kubernetes with Octopus
• Multi-environment deployments
• Installing a dashboard
• Observing deployment strategies
• Blue/green deployment strategy
• ConfigMaps and Secrets
• ConfigMaps and Secrets demo
• Role Based Access Control
• Role Based Access Control demo
• Ingress and Ingress Controllers
• Ingress and Ingress Controllers demo
• Deploy Google's Online Boutique microservice stack in Octopus

Resources

• Octopus trial

Sample Pod YAML

apiVersion: v1
kind: Pod
metadata:
  name: underwater
spec:
  containers:
  - name: webapp
    image: octopussamples/underwater-app
    ports:
    - containerPort: 80

Sample ReplicaSet YAML

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: webapp
spec:
  replicas: 3
  selector:
    matchLabels:
      tier: webapp
  template:
    metadata:
      labels:
        tier: webapp
    spec:
      containers:
      - name: webapp
        image: octopussamples/underwater-app
        ports:
        - containerPort: 80

Sample Deployment YAML

apiVersion: apps/v1
kind: Deployment
metadata:
  name: webapp
spec:
  replicas: 3
  selector:
    matchLabels:
      tier: webapp
  template:
    metadata:
      labels:
        tier: webapp
    spec:
      containers:
      - name: webapp
        image: octopussamples/underwater-app
        ports:
        - containerPort: 80

Learn more

If you're looking to build and deploy containerized applications to AWS platforms such as EKS and ECS, the Octopus Workflow Builder populates a GitHub repository with a sample application built with GitHub Actions workflows and configures a hosted Octopus instance with sample deployment projects demonstrating best practices such as vulnerability scanning and Infrastructure as Code (IaC).

Happy deployments!