🛠 Example Differences

✅ 1. DeploymentConfig Example (Old way)

apiVersion: apps.openshift.io/v1
kind: DeploymentConfig
metadata:
  name: myapp
spec:
  replicas: 2
  selector:
    app: myapp
  triggers:
    - type: ConfigChange
    - type: ImageChange
  template:
    metadata:
      labels:
        app: myapp
    spec:
      containers:
      - name: myapp
        image: myapp:latest

• ImageChangeTrigger automatically pulls new images!
• Used with BuildConfigs and ImageStreams.

✅ 2. Deployment Example (Modern way)

apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp
spec:
  replicas: 2
  selector:
    matchLabels:
      app: myapp
  strategy:
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: myapp
    spec:
      containers:
      - name: myapp
        image: myapp:latest

• Pure Kubernetes Deployment.
• No automatic ImageStream trigger — you must manually update, use GitOps, webhook, or Tekton.

🔥 Key Functional Differences

🎯 In Short

📋 Quick Real World Examples:

📢 Final Message:

• DeploymentConfig = OpenShift-specific, powerful in OpenShift pipelines, but deprecated for new feature development in 4.14+.
• Deployment = Kubernetes standard object, recommended for all new apps moving forward.

🌟 Bonus Tip:

✅ You can still use ImageStreams + Deployment together —
but instead of using “ImageChangeTriggers,”
you need to use external CI/CD pipelines (like Jenkins, Tekton, GitHub Actions) to update the Deployment automatically.

🎯 Quick One-Liner:

DeploymentConfig = OpenShift magic for older CI/CD,
Deployment = Kubernetes standard for modern apps.

Rajesh Kumar

I’m Rajesh Kumar, a DevOps, SRE, DevSecOps, Cloud, and Platform Engineering expert passionate about sharing practical knowledge, real-world experiences, and industry best practices. I have worked at Cotocus and regularly write about technology, travel, investing, health, product reviews, and digital marketing through my various platforms.

I publish technical articles at DevOps School, travel stories at Holiday Landmark, stock market insights at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow, and SEO and digital marketing strategies at Wizbrand.