Get started with buildpacks
Kf supports a variety of buildpacks. This document covers some starter examples for using them.
Before you begin
- You should have Kf running on a cluster.
- You should have run
kf target -s <space-name>to target your space.
Java (v2) buildpack
Use spring initializr to create a Java 8 maven project with a spring web dependency and JAR packaging. Download it, extract it, and once extracted you can generate a JAR.
./mvnw package
Push the JAR to Kf with the Java v2 buildpack.
kf push java-v2 --path target/helloworld-0.0.1-SNAPSHOT.jar
Java (v3) buildpack
Use spring initializr to create a Java 8 maven project with a spring web dependency and JAR packaging. Download it, extract it, and once extracted, push to Kf with the cloud native buildpack.
kf push java-v3 --stack org.cloudfoundry.stacks.cflinuxfs3
Python (v2) buildpack
Create a new directory with files as shown in the following structure.
tree
.
├── Procfile
├── requirements.txt
└── server.py
cat Procfile
web: python server.py
cat requirements.txt
Flask
cat server.py
from flask import Flask
import os
app = Flask(__name__)
@app.route('/')
def hello_world():
return 'Hello, World!'
if __name__ == "__main__":
port = int(os.getenv("PORT", 8080))
app.run(host='0.0.0.0', port=port)
Push the Python flask app using v2 buildpacks.
kf push python --buildpack python\_buildpack
Python (v3) buildpack
(same as above)
Push the Python flask app using cloud native buildpacks.
kf push pythonv3 --stack org.cloudfoundry.stacks.cflinuxfs3
Staticfile (v2) buildpack
Create a new directory that holds your source code.
Add an index.html file with this content.
<!DOCTYPE html>
<html lang="en">
<head><title>Hello, world!</title></head>
<body><h1>Hello, world!</h1></body>
</html>
Push the static content with the staticfile buildpack.
kf push staticsite --buildpack staticfile\_buildpack