Let’s use the base Paketo Builder and the pack CLI to build a Node.js app
as a runnable container image.
Clone the Paketo samples repository and navigate to the source code for the sample Node.js app.
git clone https://github.com/paketo-buildpacks/samples \ && cd samples/nodejs/npm
From the sample app directory, use the pack CLI to build an app image.
pack build paketo-demo-app --builder paketobuildpacks/builder-jammy-base
===> DETECTING
4 of 8 buildpacks participating
paketo-buildpacks/ca-certificates 2.3.2
paketo-buildpacks/node-engine 0.6.2
paketo-buildpacks/npm-install 0.4.0
paketo-buildpacks/npm-start 0.3.0
===> ANALYZING
Previous image with name "paketo-demo-app" not found
===> RESTORING
===> BUILDING
Paketo CA Certificates Buildpack 2.3.2
https://github.com/paketo-buildpacks/ca-certificates
Launch Helper: Contributing to layer
Creating /layers/paketo-buildpacks_ca-certificates/helper/exec.d/ca-certificates-helper
Paketo Node Engine Buildpack 0.6.2
Resolving Node Engine version
Candidate version sources (in priority order):
package.json -> ">10"
<unknown> -> ""
Selected Node Engine version (using package.json): 16.6.2
Executing build process
Installing Node Engine 16.6.2
Completed in 4.372s
Configuring build environment
NODE_ENV -> "production"
NODE_HOME -> "/layers/paketo-buildpacks_node-engine/node"
NODE_VERBOSE -> "false"
Configuring launch environment
NODE_ENV -> "production"
NODE_HOME -> "/layers/paketo-buildpacks_node-engine/node"
NODE_VERBOSE -> "false"
Writing profile.d/0_memory_available.sh
Calculates available memory based on container limits at launch time.
Made available in the MEMORY_AVAILABLE environment variable.
Paketo NPM Install Buildpack 0.4.0
Resolving installation process
Process inputs:
node_modules -> "Not found"
npm-cache -> "Not found"
package-lock.json -> "Not found"
Selected NPM build process: 'npm install'
Executing build process
Running 'npm install --unsafe-perm --cache /layers/paketo-buildpacks_npm-install/npm-cache'
Completed in 2.519s
Configuring launch environment
NPM_CONFIG_LOGLEVEL -> "error"
Configuring environment shared by build and launch
PATH -> "$PATH:/layers/paketo-buildpacks_npm-install/modules/node_modules/.bin"
Paketo NPM Start Buildpack 0.3.0
Assigning launch processes
web: node server.js
===> EXPORTING
Adding layer 'paketo-buildpacks/ca-certificates:helper'
Adding layer 'paketo-buildpacks/node-engine:node'
Adding layer 'paketo-buildpacks/npm-install:modules'
Adding layer 'paketo-buildpacks/npm-install:npm-cache'
Adding 1/1 app layer(s)
Adding layer 'launcher'
Adding layer 'config'
Adding layer 'process-types'
Adding label 'io.buildpacks.lifecycle.metadata'
Adding label 'io.buildpacks.build.metadata'
Adding label 'io.buildpacks.project.metadata'
Setting default process type 'web'
Saving paketo-demo-app...
*** Images (1a770ae9a065):
paketo-demo-app
Reusing cache layer 'paketo-buildpacks/node-engine:node'
Reusing cache layer 'paketo-buildpacks/npm-install:modules'
Adding cache layer 'paketo-buildpacks/npm-install:npm-cache'
Successfully built image paketo-demo-app
Once the build finishes, you’ll see that the resulting image is on your Docker daemon.
Let’s start an instance of our app and interact with it.
Run the app image with Docker. It will receive incoming requests on localhost:8080.
docker run -d -p 8080:8080 -e PORT=8080 paketo-demo-app
Wait a few moments for the app to start. Then, use curl to make a request.
curl http://localhost:8080
<!DOCTYPE html>
<html>
<head>
<title>Powered By Paketo Buildpacks</title>
</head>
<body>
<img style="display: block; margin-left: auto; margin-right: auto; width: 50%;" src="https://paketo.io/images/paketo-logo-full-color.png"></img>
</body>
</html>