ContainerSource reference
- ContainerSource
  - Template parameter
    - Example: template parameter
  - CloudEvent Overrides
    - Example: CloudEvent Overrides

ContainerSource reference

This topic provides reference information about the configurable fields for the ContainerSource object.

ContainerSource

A ContainerSource definition supports the following fields:

Field	Description	Required or optional
apiVersion	Specifies the API version, for example `sources.knative.dev/v1`.	Required
kind	Identifies this resource object as a ContainerSource object.	Required
metadata	Specifies metadata that uniquely identifies the ContainerSource object. For example, a `name`.	Required
spec	Specifies the configuration information for this ContainerSource object.	Required
spec.sink	A reference to an object that resolves to a URI to use as the sink.	Required
spec.template	A `template` in the shape of `Deployment.spec.template` to be used for this ContainerSource.	Required
spec.ceOverrides	Defines overrides to control the output format and modifications to the event sent to the sink.	Optional

Template parameter

This is a template in the shape of Deployment.spec.template to use for the ContainerSource. For more information, see the Kubernetes Documentation.

Example: template parameter

apiVersion: sources.knative.dev/v1
kind: ContainerSource
metadata:
  name: test-heartbeats
spec:
  template:
    spec:
      containers:
        - image: gcr.io/knative-nightly/knative.dev/eventing/cmd/heartbeats
          name: heartbeats
          args:
            - --period=1
          env:
            - name: POD_NAME
              value: "mypod"
            - name: POD_NAMESPACE
              value: "event-test"
  ...

CloudEvent Overrides

CloudEvent Overrides defines overrides to control the output format and modifications of the event sent to the sink.

A ceOverrides definition supports the following fields:

Field	Description	Required or optional
`extensions`	Specifies which attributes are added or overridden on the outbound event. Each `extensions` key-value pair is set independently on the event as an attribute extension.	Optional

Note

Only valid CloudEvent attribute names are allowed as extensions. You cannot set the spec defined attributes from the extensions override configuration. For example, you can not modify the type attribute.

Example: CloudEvent Overrides

apiVersion: sources.knative.dev/v1
kind: ContainerSource
metadata:
  name: test-heartbeats
spec:
  ...
  ceOverrides:
    extensions:
      extra: this is an extra attribute
      additional: 42

Contract

This results in the K_CE_OVERRIDES environment variable being set on the subject as follows:

{ "extensions": { "extra": "this is an extra attribute", "additional": "42" } }