openapi: 3.1.0
info:
  title: Google Cloud Load Balancing API
  description: >-
    Provides programmatic access to manage load balancers, backend services,
    health checks, URL maps, and forwarding rules for distributing traffic
    across Google Cloud resources.
  version: v1
  contact:
    name: Google Cloud
    url: https://cloud.google.com/load-balancing/docs
servers:
  - url: https://compute.googleapis.com/compute/v1
    description: Google Cloud Load Balancing production endpoint
tags:
  - name: BackendServices
    description: Manage backend services for load balancers
  - name: ForwardingRules
    description: Manage forwarding rules for directing traffic
  - name: HealthChecks
    description: Manage health checks for backend services
  - name: UrlMaps
    description: Manage URL maps for routing traffic
paths:
  /projects/{project}/global/backendServices:
    get:
      operationId: listBackendServices
      summary: Google Cloud Load Balancing List backend services
      description: Retrieves the list of backend services available to the specified project.
      tags:
        - BackendServices
      parameters:
        - name: project
          in: path
          required: true
          schema:
            type: string
          description: Project ID for this request
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BackendServiceList'
    post:
      operationId: createBackendService
      summary: Google Cloud Load Balancing Create a backend service
      description: Creates a backend service in the specified project.
      tags:
        - BackendServices
      parameters:
        - name: project
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BackendService'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Operation'
  /projects/{project}/global/backendServices/{backendService}:
    get:
      operationId: getBackendService
      summary: Google Cloud Load Balancing Get a backend service
      description: Returns the specified backend service resource.
      tags:
        - BackendServices
      parameters:
        - name: project
          in: path
          required: true
          schema:
            type: string
        - name: backendService
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BackendService'
    delete:
      operationId: deleteBackendService
      summary: Google Cloud Load Balancing Delete a backend service
      description: Deletes the specified backend service.
      tags:
        - BackendServices
      parameters:
        - name: project
          in: path
          required: true
          schema:
            type: string
        - name: backendService
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Operation'
  /projects/{project}/global/healthChecks:
    get:
      operationId: listHealthChecks
      summary: Google Cloud Load Balancing List health checks
      description: Retrieves the list of health check resources available to the specified project.
      tags:
        - HealthChecks
      parameters:
        - name: project
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HealthCheckList'
  /projects/{project}/global/forwardingRules:
    get:
      operationId: listForwardingRules
      summary: Google Cloud Load Balancing List forwarding rules
      description: Retrieves the list of forwarding rules available to the specified project.
      tags:
        - ForwardingRules
      parameters:
        - name: project
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ForwardingRuleList'
  /projects/{project}/global/urlMaps:
    get:
      operationId: listUrlMaps
      summary: Google Cloud Load Balancing List URL maps
      description: Retrieves the list of URL map resources available to the specified project.
      tags:
        - UrlMaps
      parameters:
        - name: project
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UrlMapList'
components:
  schemas:
    BackendService:
      type: object
      properties:
        id:
          type: string
          description: Unique identifier for the resource
        name:
          type: string
          description: Name of the resource
        description:
          type: string
          description: An optional description of the resource
        protocol:
          type: string
          enum:
            - HTTP
            - HTTPS
            - TCP
            - SSL
            - UDP
          description: The protocol this backend service uses
        port:
          type: integer
          description: Default port used by the backend service
        healthChecks:
          type: array
          items:
            type: string
          description: URLs of the health checks for this backend service
        backends:
          type: array
          items:
            $ref: '#/components/schemas/Backend'
          description: The list of backends that serve this backend service
        loadBalancingScheme:
          type: string
          enum:
            - EXTERNAL
            - INTERNAL
            - INTERNAL_MANAGED
          description: The load balancing scheme for this backend service
        selfLink:
          type: string
          description: Server-defined URL for the resource
    Backend:
      type: object
      properties:
        group:
          type: string
          description: URL of the instance group resource
        balancingMode:
          type: string
          enum:
            - UTILIZATION
            - RATE
            - CONNECTION
        capacityScaler:
          type: number
          description: Multiplier applied to the backend capacity
    BackendServiceList:
      type: object
      properties:
        items:
          type: array
          items:
            $ref: '#/components/schemas/BackendService'
    HealthCheckList:
      type: object
      properties:
        items:
          type: array
          items:
            type: object
    ForwardingRuleList:
      type: object
      properties:
        items:
          type: array
          items:
            type: object
    UrlMapList:
      type: object
      properties:
        items:
          type: array
          items:
            type: object
    Operation:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
        status:
          type: string
        targetLink:
          type: string
  securitySchemes:
    oauth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: https://accounts.google.com/o/oauth2/auth
          tokenUrl: https://oauth2.googleapis.com/token
          scopes:
            https://www.googleapis.com/auth/compute: Manage your Google Compute Engine resources
            https://www.googleapis.com/auth/cloud-platform: Full access to Google Cloud Platform resources
security:
  - oauth2:
      - https://www.googleapis.com/auth/compute