Kpack

A Carvel package for kpack, a Kubernetes-native implementation of Cloud Native Buildpacks to build OCI images from within the cluster.

🚀  Getting Started

Prerequisites

• Kubernetes 1.28+

• Carvel kctrl CLI.

• Carvel kapp-controller deployed in your Kubernetes cluster. You can install it with Carvel kapp (recommended choice) or kubectl.

  kapp deploy -a kapp-controller -y \
    -f https://github.com/carvel-dev/kapp-controller/releases/latest/download/release.yml

Installation

Add the Kadras package repository to your Kubernetes cluster:

kctrl package repository add -r kadras-packages \
  --url ghcr.io/kadras-io/kadras-packages \
  -n kadras-system --create-namespace

Installation without package repository

The recommended way of installing the kpack package is via the Kadras package repository. If you prefer not using the repository, you can add the package definition directly using kapp or kubectl.

kubectl create namespace kadras-system
kapp deploy -a kpack-package -n kadras-system -y \
  -f https://github.com/kadras-io/package-for-kpack/releases/latest/download/metadata.yml \
  -f https://github.com/kadras-io/package-for-kpack/releases/latest/download/package.yml

Install the kpack package:

kctrl package install -i kpack \
  -p kpack.packages.kadras.io \
  -v ${VERSION} \
  -n kadras-system

Note You can find the ${VERSION} value by retrieving the list of package versions available in the Kadras package repository installed on your cluster.

kctrl package available list -p kpack.packages.kadras.io -n kadras-system

Verify the installed packages and their status:

kctrl package installed list -n kadras-system

📙  Documentation

Documentation, tutorials and examples for this package are available in the docs folder. For documentation specific to kpack, check out github.com/buildpacks-community/kpack.

🎯  Configuration

The kpack package can be customized via a values.yml file.

kp_default_repository:
  name: ghcr.io/thomasvitale/buildpacks
  credentials:
    username: "jon.snow"
    password: "youknownothing"

Reference the values.yml file from the kctrl command when installing or upgrading the package.

kctrl package install -i kpack \
  -p kpack.packages.kadras.io \
  -v ${VERSION} \
  -n kadras-system \
  --values-file values.yml

Values

The kpack package has the following configurable properties.

Configurable properties

Config	Default	Description
ca_cert_data	""	PEM-encoded certificate data that kpack controller will use to trust TLS connections based on a custom CA with a container registry. Note: This will not be injected into builds, you need to use the cert injection webhook with the kpack.io/build label value.

Settings for the default container repository used by kpack.

Config	Default	Description
kp_default_repository.name	""	The default repository to use for builder images and dependencies. For example, GitHub Container Registry: ghcr.io/my-org/buildpacks; GCR: gcr.io/my-project/buildpacks; Harbor: myharbor.io/my-project/buildpacks, Dockerhub: docker.io/my-username/buildpacks.
kp_default_repository.credentials.username	""	Username to access the default container repository. Note: Use _json_key for GCR.
kp_default_repository.credentials.password	""	Token to access the default container repository. Note: Use contents of service account key json for GCR.
kp_default_repository.secret.name	""	The name of the Secret holding the credentials to access the default container repository.
kp_default_repository.secret.namespace	""	The namespace of the Secret holding the credentials to access the default container repository.
kp_default_repository.secret.create_export	false	Whether to create a SecretExport resource to export the Secret from the source namespace to the kpack namespace. Not needed when installing kpack as part of the Kadras Enginnering Platform.
kp_default_repository.aws_iam_role_arn	""	IAM credentials to access the default container repository if the registry is on AWS.

Setting for the kpack controller.

Config	Default	Description
controller.resources.requests.memory	"1Gi"	Memory requests configuration for the kpack-controller Deployment. In a resource-constrained environment, you can lower this up to 100Mi.
controller.resources.limits.memory	"1Gi"	Memory limits configuration for the kpack-controller Deployment. In a resource-constrained environment, you can lower this up to 500Mi.
config.injected_sidecar_support	false	Enable support for injected sidecars.

Settings for the corporate proxy.

Config	Default	Description
proxy.http_proxy	""	The HTTP proxy to use for network traffic.
proxy.https_proxy	""	The HTTPS proxy to use for network traffic.
proxy.no_proxy	""	A comma-separated list of hostnames, IP addresses, or IP ranges in CIDR format that should not use a proxy (e.g. Kubernetes API address).

🛡️  Security

The security process for reporting vulnerabilities is described in SECURITY.md.

🖊️  License

This project is licensed under the Apache License 2.0. See LICENSE for more information.

🙏  Acknowledgments

This package is inspired by the original kpack package used in the Tanzu Community Edition project before its retirement.