Reference documentation and code samples for the Compute Engine v1 API enum GRPCHealthCheck.Types.PortSpecification.
Specifies how a port is selected for health checking. Can be one of the following values: USE_FIXED_PORT: Specifies a port number explicitly using the port field in the health check. Supported by backend services for pass-through load balancers and backend services for proxy load balancers. Not supported by target pools. The health check supports all backends supported by the backend service provided the backend can be health checked. For example, GCE_VM_IP network endpoint groups, GCE_VM_IP_PORT network endpoint groups, and instance group backends. USE_NAMED_PORT: Not supported. USE_SERVING_PORT: Provides an indirect method of specifying the health check port by referring to the backend service. Only supported by backend services for proxy load balancers. Not supported by target pools. Not supported by backend services for pass-through load balancers. Supports all backends that can be health checked; for example, GCE_VM_IP_PORT network endpoint groups and instance group backends. For GCE_VM_IP_PORT network endpoint group backends, the health check uses the port number specified for each endpoint in the network endpoint group. For instance group backends, the health check uses the port number determined by looking up the backend service's named port in the instance group's list of named ports.
A value indicating that the enum field is not set.
UseFixedPort
The port number in the health check's port is used for health checking. Applies to network endpoint group and instance group backends.
UseNamedPort
Not supported.
UseServingPort
For network endpoint group backends, the health check uses the port number specified on each endpoint in the network endpoint group. For instance group backends, the health check uses the port number specified for the backend service's named port defined in the instance group's named ports.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-08 UTC."],[[["\u003cp\u003eThis page provides version-specific documentation for the \u003ccode\u003ePortSpecification\u003c/code\u003e enum within the Google Cloud Compute Engine v1 API, detailing versions from 1.0.0 up to the latest release, 3.6.0.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePortSpecification\u003c/code\u003e enum in the Compute Engine v1 API defines how a port is chosen for health checks, with options including \u003ccode\u003eUseFixedPort\u003c/code\u003e, \u003ccode\u003eUseNamedPort\u003c/code\u003e, and \u003ccode\u003eUseServingPort\u003c/code\u003e, although \u003ccode\u003eUseNamedPort\u003c/code\u003e is not currently supported.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of this API is version 3.6.0, as indicated by the content, and all previous versions of the API, going back to version 1.0.0 are available on the page.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eUseFixedPort\u003c/code\u003e option directly specifies a port number for health checks, \u003ccode\u003eUseServingPort\u003c/code\u003e indirectly specifies a port by referencing the backend service, and \u003ccode\u003eUndefinedPortSpecification\u003c/code\u003e is a null value for the enum.\u003c/p\u003e\n"],["\u003cp\u003eThis documentation references the \u003ccode\u003eGoogle.Cloud.Compute.V1\u003c/code\u003e namespace and the \u003ccode\u003eGoogle.Cloud.Compute.V1.dll\u003c/code\u003e assembly, which is specific to the .NET environment.\u003c/p\u003e\n"]]],[],null,[]]
