Knative Serving API

openapi: 3.1.0
info:
  title: Knative Serving API
  description: >-
    The Knative Serving API extends the Kubernetes API with custom resources
    for deploying and managing serverless workloads. The four core resources —
    Service, Route, Configuration, and Revision — enable automatic scaling
    including scale-to-zero, traffic splitting between revisions, and
    progressive rollouts. Service is the top-level resource that automatically
    manages Routes and Configurations. All resources are served through the
    Kubernetes API server under the serving.knative.dev API group.
  version: '1.0'
  contact:
    name: Knative Community
    url: https://knative.dev/community/
externalDocs:
  description: Knative Serving API Reference
  url: https://knative.dev/docs/serving/reference/serving-api/
servers:
  - url: https://kubernetes.default.svc
    description: Kubernetes API Server (in-cluster)
tags:
  - name: Configurations
    description: >-
      Knative Configuration resources maintain the desired state for a
      deployment by capturing container templates. Each update to a
      Configuration creates a new immutable Revision.
  - name: DomainMappings
    description: >-
      Knative DomainMapping resources map a custom domain name to a Knative
      Service, enabling services to be served under custom hostnames with
      automatic TLS certificate provisioning.
  - name: Revisions
    description: >-
      Knative Revision resources are immutable snapshots of application code
      and configuration at a point in time. Revisions are created by
      Configuration updates and are the actual units that are scaled.
  - name: Routes
    description: >-
      Knative Route resources manage the network endpoints and traffic
      distribution across Revisions. Routes support percentage-based traffic
      splitting for canary deployments and named route targets.
security:
  - bearerAuth: []
paths:
  /apis/serving.knative.dev/v1/namespaces/{namespace}/services:
    get:
      operationId: listServices
      summary: List Knative Services
      description: >-
        Returns a list of all Knative Service resources in the specified
        namespace. Services are the primary resource for deploying serverless
        workloads and automatically manage Routes, Configurations, and Revisions.
      tags: []
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/labelSelector'
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/continueToken'
      responses:
        '200':
          description: Successfully listed Services.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ServiceList'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createService
      summary: Create a Knative Service
      description: >-
        Creates a new Knative Service resource. Knative will automatically
        create a corresponding Route and Configuration, and will create the
        first Revision from the provided template. The Service begins routing
        traffic to the Revision once it becomes ready.
      tags: []
      parameters:
        - $ref: '#/components/parameters/namespace'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Service'
      responses:
        '201':
          description: Service successfully created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Service'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '409':
          $ref: '#/components/responses/Conflict'
  /apis/serving.knative.dev/v1/namespaces/{namespace}/services/{name}:
    get:
      operationId: getService
      summary: Get a Knative Service
      description: >-
        Returns the details of a specific Knative Service including its
        template spec, traffic configuration, and status conditions reflecting
        readiness, latestCreatedRevisionName, and latestReadyRevisionName.
      tags: []
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/name'
      responses:
        '200':
          description: Successfully retrieved the Service.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Service'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: replaceService
      summary: Replace a Knative Service
      description: >-
        Replaces a Knative Service. Any change to the spec.template causes
        Knative to create a new Revision. Traffic routing continues to the
        previous Revision until the new one becomes ready, unless traffic
        configuration specifies otherwise.
      tags: []
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/name'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Service'
      responses:
        '200':
          description: Service successfully replaced.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Service'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteService
      summary: Delete a Knative Service
      description: >-
        Deletes a Knative Service and all its owned resources including Routes,
        Configurations, and Revisions. Pods are terminated and the DNS entries
        are removed.
      tags: []
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/name'
      responses:
        '200':
          description: Service deletion initiated.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Status'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /apis/serving.knative.dev/v1/namespaces/{namespace}/routes:
    get:
      operationId: listRoutes
      summary: List Knative Routes
      description: >-
        Returns a list of all Knative Route resources in the specified
        namespace. Routes map network endpoints to Revisions and manage
        percentage-based traffic distribution.
      tags:
        - Routes
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/labelSelector'
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/continueToken'
      responses:
        '200':
          description: Successfully listed Routes.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/RouteList'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createRoute
      summary: Create a Knative Route
      description: >-
        Creates a new Knative Route resource. Routes can distribute traffic
        across multiple Revisions using percentage-based splitting. Traffic
        percentages across all targets must sum to 100.
      tags:
        - Routes
      parameters:
        - $ref: '#/components/parameters/namespace'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Route'
      responses:
        '201':
          description: Route successfully created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Route'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /apis/serving.knative.dev/v1/namespaces/{namespace}/routes/{name}:
    get:
      operationId: getRoute
      summary: Get a Knative Route
      description: >-
        Returns the details of a specific Knative Route including its traffic
        targets, URLs for named routes, and status conditions.
      tags:
        - Routes
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/name'
      responses:
        '200':
          description: Successfully retrieved the Route.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Route'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteRoute
      summary: Delete a Knative Route
      description: >-
        Deletes a Knative Route. Traffic to the associated URL will cease.
        Note that Routes owned by a Service are automatically deleted when
        the Service is deleted.
      tags:
        - Routes
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/name'
      responses:
        '200':
          description: Route deletion initiated.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Status'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /apis/serving.knative.dev/v1/namespaces/{namespace}/configurations:
    get:
      operationId: listConfigurations
      summary: List Knative Configurations
      description: >-
        Returns a list of all Knative Configuration resources in the specified
        namespace. Configurations hold the desired state template and track
        the latest created and ready Revisions.
      tags:
        - Configurations
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/labelSelector'
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/continueToken'
      responses:
        '200':
          description: Successfully listed Configurations.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ConfigurationList'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /apis/serving.knative.dev/v1/namespaces/{namespace}/configurations/{name}:
    get:
      operationId: getConfiguration
      summary: Get a Knative Configuration
      description: >-
        Returns details of a specific Knative Configuration including its
        revision template, latestCreatedRevisionName, and latestReadyRevisionName
        in the status.
      tags:
        - Configurations
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/name'
      responses:
        '200':
          description: Successfully retrieved the Configuration.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Configuration'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /apis/serving.knative.dev/v1/namespaces/{namespace}/revisions:
    get:
      operationId: listRevisions
      summary: List Knative Revisions
      description: >-
        Returns a list of all Knative Revision resources in the specified
        namespace. Revisions are immutable snapshots created by Configuration
        updates and are the actual units that are autoscaled to handle traffic.
      tags:
        - Revisions
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/labelSelector'
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/continueToken'
      responses:
        '200':
          description: Successfully listed Revisions.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/RevisionList'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /apis/serving.knative.dev/v1/namespaces/{namespace}/revisions/{name}:
    get:
      operationId: getRevision
      summary: Get a Knative Revision
      description: >-
        Returns the details of a specific Knative Revision including its
        container spec, autoscaling annotations, and status conditions
        reflecting whether it is Ready and Active.
      tags:
        - Revisions
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/name'
      responses:
        '200':
          description: Successfully retrieved the Revision.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Revision'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteRevision
      summary: Delete a Knative Revision
      description: >-
        Deletes a specific Knative Revision. Only Revisions that are not
        receiving traffic can be deleted. Revisions owned by a Service may
        have a retain policy; check the Service's revisionHistoryLimit.
      tags:
        - Revisions
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/name'
      responses:
        '200':
          description: Revision deletion initiated.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Status'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /apis/serving.knative.dev/v1alpha1/namespaces/{namespace}/domainmappings:
    get:
      operationId: listDomainMappings
      summary: Knative List DomainMappings
      description: >-
        Returns a list of all DomainMapping resources in the specified
        namespace. DomainMappings associate custom domain names with Knative
        Services and manage TLS certificate provisioning.
      tags:
        - DomainMappings
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/labelSelector'
        - $ref: '#/components/parameters/limit'
        - $ref: '#/components/parameters/continueToken'
      responses:
        '200':
          description: Successfully listed DomainMappings.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DomainMappingList'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createDomainMapping
      summary: Knative Create a DomainMapping
      description: >-
        Creates a DomainMapping to associate a custom domain name with a
        Knative Service. Knative will handle TLS certificate provisioning
        via cert-manager or another configured certificate provider.
      tags:
        - DomainMappings
      parameters:
        - $ref: '#/components/parameters/namespace'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DomainMapping'
      responses:
        '201':
          description: DomainMapping successfully created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DomainMapping'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /apis/serving.knative.dev/v1alpha1/namespaces/{namespace}/domainmappings/{name}:
    get:
      operationId: getDomainMapping
      summary: Knative Get a DomainMapping
      description: >-
        Returns the details of a specific DomainMapping including its reference
        target, URL, and TLS certificate status conditions.
      tags:
        - DomainMappings
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/name'
      responses:
        '200':
          description: Successfully retrieved the DomainMapping.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DomainMapping'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteDomainMapping
      summary: Knative Delete a DomainMapping
      description: >-
        Deletes a DomainMapping. The custom domain will no longer route to
        the Knative Service and the TLS certificate will be released.
      tags:
        - DomainMappings
      parameters:
        - $ref: '#/components/parameters/namespace'
        - $ref: '#/components/parameters/name'
      responses:
        '200':
          description: DomainMapping deletion initiated.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Status'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: >-
        Kubernetes service account token or user bearer token. RBAC policies
        control access to Knative Serving resources.
  parameters:
    namespace:
      name: namespace
      in: path
      required: true
      description: Kubernetes namespace containing the resource.
      schema:
        type: string
    name:
      name: name
      in: path
      required: true
      description: Name of the Knative resource.
      schema:
        type: string
    labelSelector:
      name: labelSelector
      in: query
      required: false
      description: Selector to filter resources by label key-value pairs.
      schema:
        type: string
    limit:
      name: limit
      in: query
      required: false
      description: Maximum number of items to return in a single response.
      schema:
        type: integer
        minimum: 1
    continueToken:
      name: continue
      in: query
      required: false
      description: Pagination token returned by a previous list call.
      schema:
        type: string
  responses:
    BadRequest:
      description: The request was malformed or failed validation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Status'
    Unauthorized:
      description: Authentication credentials are missing or invalid.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Status'
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Status'
    Conflict:
      description: A resource with this name already exists.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Status'
  schemas:
    ObjectMeta:
      type: object
      description: Standard Kubernetes object metadata.
      required:
        - name
      properties:
        name:
          type: string
          description: Unique name of the resource within its namespace.
        namespace:
          type: string
          description: Namespace the resource belongs to.
        labels:
          type: object
          description: Key-value labels for organizing and selecting resources.
          additionalProperties:
            type: string
        annotations:
          type: object
          description: Non-identifying metadata, including autoscaling configuration annotations.
          additionalProperties:
            type: string
        resourceVersion:
          type: string
          description: Opaque string identifying the resource version for optimistic concurrency.
        uid:
          type: string
          description: Unique identifier assigned by the API server.
        generation:
          type: integer
          description: Sequence number incremented on each spec change.
        creationTimestamp:
          type: string
          format: date-time
          description: Time the resource was created.
        deletionTimestamp:
          type: string
          format: date-time
          description: Time after which the resource will be deleted.
        ownerReferences:
          type: array
          description: References to objects that own this resource.
          items:
            type: object
            properties:
              apiVersion:
                type: string
                description: API version of the owner.
              kind:
                type: string
                description: Kind of the owner.
              name:
                type: string
                description: Name of the owner.
              uid:
                type: string
                description: UID of the owner.
    Condition:
      type: object
      description: A status condition on a Knative resource.
      required:
        - type
        - status
      properties:
        type:
          type: string
          description: Type of condition such as Ready or Active.
        status:
          type: string
          enum:
            - 'True'
            - 'False'
            - Unknown
          description: Status of the condition.
        reason:
          type: string
          description: Machine-readable reason for the last condition transition.
        message:
          type: string
          description: Human-readable message explaining the current condition.
        lastTransitionTime:
          type: string
          format: date-time
          description: Time of the last condition transition.
    Status:
      type: object
      description: Kubernetes API Status response for errors and operation results.
      properties:
        apiVersion:
          type: string
          description: API version of the Status object.
        kind:
          type: string
          const: Status
          description: Always Status.
        status:
          type: string
          description: Success or Failure.
        message:
          type: string
          description: Human-readable description of the status.
        reason:
          type: string
          description: Machine-readable reason, such as NotFound or AlreadyExists.
        code:
          type: integer
          description: HTTP status code.
    RevisionTemplate:
      type: object
      description: >-
        Template for creating Knative Revisions. The template includes
        container spec, scaling configuration, and other pod-level settings.
        Each unique combination of template values results in a distinct Revision.
      properties:
        metadata:
          type: object
          description: Metadata for the Revision template including autoscaling annotations.
          properties:
            name:
              type: string
              description: >-
                Optional explicit Revision name. If omitted, Knative generates a name.
                Use this for predictable Revision names in traffic targets.
            labels:
              type: object
              description: Labels applied to the Revision.
              additionalProperties:
                type: string
            annotations:
              type: object
              description: >-
                Annotations for autoscaling configuration. Common annotations include
                autoscaling.knative.dev/minScale, autoscaling.knative.dev/maxScale,
                and autoscaling.knative.dev/target.
              additionalProperties:
                type: string
        spec:
          type: object
          description: Revision spec defining containers, volumes, and scaling behavior.
          properties:
            containerConcurrency:
              type: integer
              minimum: 0
              description: >-
                Maximum number of simultaneous requests per container instance.
                A value of 0 means unlimited concurrency.
            timeoutSeconds:
              type: integer
              minimum: 0
              description: Maximum number of seconds a request can take before timing out.
            serviceAccountName:
              type: string
              description: Name of the service account to use for the revision pods.
            containers:
              type: array
              description: List of containers in the revision pod template.
              items:
                $ref: '#/components/schemas/Container'
            volumes:
              type: array
              description: Volumes to mount into containers.
              items:
                type: object
                description: A Kubernetes volume definition.
    Container:
      type: object
      description: A container definition for a Knative Revision.
      required:
        - image
      properties:
        name:
          type: string
          description: Name of the container. Defaults to the first container name.
        image:
          type: string
          description: OCI image reference for the container.
        ports:
          type: array
          description: Ports exposed by the container. Knative uses the first container port for routing.
          items:
            type: object
            properties:
              containerPort:
                type: integer
                description: Port number exposed by the container.
              name:
                type: string
                description: Port name, typically h2c for HTTP/2 or http1 for HTTP/1.1.
              protocol:
                type: string
                description: Protocol for the port, usually TCP.
        env:
          type: array
          description: Environment variables set in the container.
          items:
            type: object
            properties:
              name:
                type: string
                description: Environment variable name.
              value:
                type: string
                description: Literal value for the environment variable.
              valueFrom:
                type: object
                description: Source for the environment variable value from a ConfigMap or Secret.
        resources:
          type: object
          description: Compute resource requests and limits for the container.
          properties:
            requests:
              type: object
              description: Minimum resources requested.
              additionalProperties:
                type: string
            limits:
              type: object
              description: Maximum resources allowed.
              additionalProperties:
                type: string
        readinessProbe:
          type: object
          description: Probe to determine when the container is ready to accept traffic.
        livenessProbe:
          type: object
          description: Probe to determine if the container is still running.
        volumeMounts:
          type: array
          description: Volume mounts for the container.
          items:
            type: object
            properties:
              name:
                type: string
                description: Name of the volume to mount.
              mountPath:
                type: string
                description: Path within the container to mount the volume.
    TrafficTarget:
      type: object
      description: A traffic target that routes a percentage of traffic to a specific Revision or the latest ready Revision.
      properties:
        revisionName:
          type: string
          description: Specific Revision name to route traffic to. Mutually exclusive with configurationName.
        configurationName:
          type: string
          description: Configuration name to route traffic to the latest ready Revision of that Configuration.
        latestRevision:
          type: boolean
          description: Whether to route to the latest ready Revision. Mutually exclusive with revisionName.
        percent:
          type: integer
          minimum: 0
          maximum: 100
          description: Percentage of traffic to route to this target. All percentages must sum to 100.
        tag:
          type: string
          description: Optional name that creates a named subdomain URL for this traffic target.
        url:
          type: string
          format: uri
          description: >-
            Read-only URL for this traffic target. Set by Knative in status.
            Named tags receive a subdomain URL.
    Service:
      type: object
      description: >-
        A Knative Service that manages the full lifecycle of a serverless
        workload including its Route, Configuration, and Revisions. Service
        is the primary API for deploying applications on Knative Serving.
      required:
        - apiVersion
        - kind
        - metadata
        - spec
      properties:
        apiVersion:
          type: string
          const: serving.knative.dev/v1
          description: API version for the Knative Service.
        kind:
          type: string
          const: Service
          description: Resource kind identifier.
        metadata:
          $ref: '#/components/schemas/ObjectMeta'
        spec:
          type: object
          description: Specification for the Knative Service.
          required:
            - template
          properties:
            template:
              $ref: '#/components/schemas/RevisionTemplate'
            traffic:
              type: array
              description: Traffic distribution across Revisions. Percentages must sum to 100.
              items:
                $ref: '#/components/schemas/TrafficTarget'
        status:
          type: object
          description: Status of the Knative Service as observed by the controller.
          properties:
            url:
              type: string
              format: uri
              description: Primary URL for the Service.
            address:
              type: object
              description: Cluster-internal URL for the Service.
              properties:
                url:
                  type: string
                  description: Cluster-internal URL.
            latestCreatedRevisionName:
              type: string
              description: Name of the most recently created Revision.
            latestReadyRevisionName:
              type: string
              description: Name of the most recently ready Revision that is currently serving traffic.
            observedGeneration:
              type: integer
              description: Generation observed by the controller.
            conditions:
              type: array
              description: Status conditions for the Service.
              items:
                $ref: '#/components/schemas/Condition'
            traffic:
              type: array
              description: Current traffic distribution as observed by Knative.
              items:
                $ref: '#/components/schemas/TrafficTarget'
    ServiceList:
      type: object
      description: A list of Knative Service resources.
      required:
        - apiVersion
        - kind
        - items
      properties:
        apiVersion:
          type: string
          description: API version for the list.
        kind:
          type: string
          const: ServiceList
          description: List kind identifier.
        metadata:
          type: object
          properties:
            resourceVersion:
              type: string
              description: Resource version of the list.
            continue:
              type: string
              description: Pagination continuation t

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