In the
world of software delivery, how we build and ship applications has changed dramatically.
Let’s take a simple look at the difference between traditional web build automation (think WAR files and Tomcat) and microservices build automation (think Docker and Kubernetes).
🔹 Traditional Web Build Automation (The Monolith Way)
In a monolithic world, you usually had one giant codebase producing a WAR/EAR file.
The build automation process looked something like this:
1.Checkout Code
Single repo with the entire application.
git clone https://github.com/company/monolith-app.git
2.Compile & Package
Use Maven to build everything at once:
mvn clean package
Output → target/myapp.war
3.Deploy
Copy WAR into Tomcat or JBoss:
cp target/myapp.war $TOMCAT_HOME/webapps/
4.Restart Server
Usually required downtime.
⚠️ Problems:
Slow builds (even for tiny changes).
Deployments were risky.
Scaling meant buying a bigger server.
🔹 Microservices Build Automation (The Cloud-Native Way)
With microservices, each service has its own repo and build pipeline.
The process looks very different:
1.Checkout Only That Service
git clone https://github.com/company/user-service.git
2.Compile & Package
Each service builds independently:
mvn clean package
Output → target/user-service.jar
3.Dockerize It
Wrap the service into a container:
FROM eclipse-temurin:17-jdk
COPY target/user-service.jar app.jar
ENTRYPOINT ["java", "-jar", "app.jar"]
Build the image:
docker build -t myorg/user-service:1.0 .
4.Push to Registry
docker push myorg/user-service:1.0
5.Deploy to Kubernetes
apiVersion: apps/v1
kind: Deployment
metadata:
name: user-service
spec:
replicas: 3
selector:
matchLabels:
app: user-service
template:
metadata:
labels:
app: user-service
spec:
containers:
- name: user-service
image: myorg/user-service:1.0
ports:
- containerPort: 8080
6.Rolling Updates
Kubernetes replaces pods gradually → zero downtime.
⚡ Benefits:
Faster builds (only the changed service).
Zero-downtime deployments.
Easy scaling (just add replicas).
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