Chainguard Container for REPO_NAME

Event-driven application platform for Kubernetes

Chainguard Containers are regularly-updated, secure-by-default container images.

Download this Container Image

For those with access, this container image is available on cgr.dev:

docker pull cgr.dev/ORGANIZATION/REPO_NAME:latest

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry.

Compatibility Notes

The Chainguard Knative Eventing Images are comparable to the official Knative Eventing Images. However, the Chainguard image contains only the minimum set of tools and dependencies needed to function. This means it doesn't include things like a package manager.

FIPS Support

The Knative Eventing FIPS Chainguard Image ships with a validated redistribution of the OpenSSL's FIPS provider module. For more on FIPS support in Chainguard Images, consult the guide on FIPS-enabled Chainguard Images on Chainguard Academy

Getting Started

You want to install Knative operator:

helm repo add knative-operator https://knative.github.io/operator
helm install knative-operator \
  --create-namespace \
  --namespace knative-operator \
  knative-operator/knative-operator \
  -f values.yaml

values.yaml

knative_operator:
  knative_operator:
    image: cgr.dev/ORGANIZATION/knative-operator
    tag: latest
  operator_webhook:
    image: cgr.dev/ORGANIZATION/knative-operator-webhook
    tag: latest

Once you have the operator up and running, create the KnativeEventing custom resource:

kubectl create ns knative-eventing

apiVersion: operator.knative.dev/v1beta1
kind: KnativeEventing
metadata:
  name: knative-eventing
  namespace: knative-eventing
spec:
  registry:
    override:
      eventing-controller/eventing-controller: knative-eventing-controller-fips
      eventing-webhook/eventing-webhook: knative-eventing-webhook-fips
      imc-controller/controller: knative-eventing-channel-controller-fips
      imc-dispatcher/dispatcher: knative-eventing-channel-dispatcher-fips
      mt-broker-controller/mt-broker-controller: knative-eventing-mtchannel-broker-fips
      mt-broker-ingress/ingress: knative-eventing-ingress-fips
      mt-broker-filter/filter: knative-eventing-filter-fips
      job-sink/job-sink: knative-eventing-jobsink-fips

Once the CR is applied, verify that all components (deployments) are up and running in the knative-eventing namespace

kubectl get pods -n knative-eventing

Next, to verify functionality, you can create a broker:

kubectl apply -n "$NAMESPACE" -f - <<EOF
apiVersion: eventing.knative.dev/v1
kind: Broker
metadata:
  name: $BROKER_NAME
EOF

and create a sink:

kubectl apply -n "$NAMESPACE" -f - <<EOF
apiVersion: v1
kind: Pod
metadata:
  name: $SINK_NAME
  labels:
    app: $SINK_NAME
spec:
  containers:
    - name: $SINK_NAME
      image: gcr.io/knative-releases/knative.dev/eventing-contrib/cmd/event_display
---
apiVersion: v1
kind: Service
metadata:
  name: $SINK_NAME
spec:
  selector:
    app: $SINK_NAME
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
EOF

next, create trigger:

kubectl apply -n "$NAMESPACE" -f - <<EOF
apiVersion: eventing.knative.dev/v1
kind: Trigger
metadata:
  name: trigger-to-sink
spec:
  broker: $BROKER_NAME
  filter:
    attributes:
      type: dev.knative.sources.ping
  subscriber:
    ref:
      apiVersion: v1
      kind: Service
      name: $SINK_NAME
EOF

Finally, a source:

kubectl apply -n "$NAMESPACE" -f - <<EOF
apiVersion: sources.knative.dev/v1
kind: PingSource
metadata:
  name: $PING_NAME
spec:
  schedule: "*/1 * * * *"
  contentType: "application/json"
  data: '{"message": "$EVENT_MESSAGE"}'
  sink:
    ref:
      apiVersion: eventing.knative.dev/v1
      kind: Broker
      name: $BROKER_NAME
EOF

Check logs in the newly created pod (from the Knative Service) to verify event delivery:

"message": "Hello from PingSource!"

This demonstrates the source to sink pattern working end-to-end.

For more eventing patterns, visit Knative Eventing Patterns

Documentation and Resources

• Knative eventing docs
• Configuring the Eventing Operator custom resource
• Sending an event

What are Chainguard Containers?

Chainguard's free tier of Starter container images are built with Wolfi, our minimal Linux undistro.

All other Chainguard Containers are built with Chainguard OS, Chainguard's minimal Linux operating system designed to produce container images that meet the requirements of a more secure software supply chain.

The main features of Chainguard Containers include:

• Minimal design, without unnecessary software bloat
• Daily builds to ensure container images are up-to-date with available security patches
• High quality build-time SBOMs attesting to the provenance of all artifacts within the image
• Verifiable signatures provided by Sigstore
• Reproducible builds with Cosign and apko (read more about reproducibility)

For cases where you need container images with shells and package managers to build or debug, most Chainguard Containers come paired with a development, or -dev, variant.

In all other cases, including Chainguard Containers tagged as :latest or with a specific version number, the container images include only an open-source application and its runtime dependencies. These minimal container images typically do not contain a shell or package manager.

Although the -dev container image variants have similar security features as their more minimal versions, they include additional software that is typically not necessary in production environments. We recommend using multi-stage builds to copy artifacts from the -dev variant into a more minimal production image.

Need additional packages?

To improve security, Chainguard Containers include only essential dependencies. Need more packages? Chainguard customers can use Custom Assembly to add packages, either through the Console, chainctl, or API.

To use Custom Assembly in the Chainguard Console: navigate to the image you'd like to customize in your Organization's list of images, and click on the Customize image button at the top of the page.

Learn More

Refer to our Chainguard Containers documentation on Chainguard Academy. Chainguard also offers VMs and Libraries — contact us for access.

Trademarks

This software listing is packaged by Chainguard. The trademarks set forth in this offering are owned by their respective companies, and use of them does not imply any affiliation, sponsorship, or endorsement by such companies.