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 passthrough load balancers and backend services
for proxy load balancers. Also supported in legacy HTTP health
checks for 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.
Enums
Name
Description
UNDEFINED_PORT_SPECIFICATION
A value indicating that the enum field is not set.
USE_FIXED_PORT
The port number in the health check's port is used for health checking. Applies to network endpoint group and instance group backends.
USE_NAMED_PORT
Not supported.
USE_SERVING_PORT
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"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-11 UTC."],[],[],null,["# Class PortSpecification (1.35.0)\n\nVersion latestkeyboard_arrow_down\n\n- [1.35.0 (latest)](/python/docs/reference/compute/latest/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.34.0](/python/docs/reference/compute/1.34.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.33.0](/python/docs/reference/compute/1.33.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.32.0](/python/docs/reference/compute/1.32.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.31.0](/python/docs/reference/compute/1.31.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.30.0](/python/docs/reference/compute/1.30.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.29.0](/python/docs/reference/compute/1.29.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.28.0](/python/docs/reference/compute/1.28.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.27.0](/python/docs/reference/compute/1.27.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.26.0](/python/docs/reference/compute/1.26.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.25.0](/python/docs/reference/compute/1.25.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.24.0](/python/docs/reference/compute/1.24.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.23.0](/python/docs/reference/compute/1.23.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.22.0](/python/docs/reference/compute/1.22.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.21.0](/python/docs/reference/compute/1.21.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.20.1](/python/docs/reference/compute/1.20.1/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.19.2](/python/docs/reference/compute/1.19.2/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.18.0](/python/docs/reference/compute/1.18.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.17.0](/python/docs/reference/compute/1.17.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.16.1](/python/docs/reference/compute/1.16.1/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.15.0](/python/docs/reference/compute/1.15.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.14.1](/python/docs/reference/compute/1.14.1/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.13.0](/python/docs/reference/compute/1.13.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.12.1](/python/docs/reference/compute/1.12.1/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.11.0](/python/docs/reference/compute/1.11.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.10.1](/python/docs/reference/compute/1.10.1/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.9.0](/python/docs/reference/compute/1.9.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.8.0](/python/docs/reference/compute/1.8.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.7.0](/python/docs/reference/compute/1.7.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.6.1](/python/docs/reference/compute/1.6.1/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.5.2](/python/docs/reference/compute/1.5.2/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.4.0](/python/docs/reference/compute/1.4.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.3.2](/python/docs/reference/compute/1.3.2/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.2.0](/python/docs/reference/compute/1.2.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.1.0](/python/docs/reference/compute/1.1.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [1.0.0](/python/docs/reference/compute/1.0.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [0.9.0](/python/docs/reference/compute/0.9.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [0.8.0](/python/docs/reference/compute/0.8.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [0.7.0](/python/docs/reference/compute/0.7.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [0.6.0](/python/docs/reference/compute/0.6.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [0.5.0](/python/docs/reference/compute/0.5.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [0.4.2](/python/docs/reference/compute/0.4.2/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [0.3.0](/python/docs/reference/compute/0.3.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [0.2.1](/python/docs/reference/compute/0.2.1/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification)\n- [0.1.0](/python/docs/reference/compute/0.1.0/google.cloud.compute_v1.types.HTTPHealthCheck.PortSpecification) \n\n PortSpecification(value)\n\nSpecifies how a port is selected for health checking. Can be one of\nthe following values: USE_FIXED_PORT: Specifies a port number\nexplicitly using the port field in the health check. Supported by\nbackend services for passthrough load balancers and backend services\nfor proxy load balancers. Also supported in legacy HTTP health\nchecks for target pools. The health check supports all backends\nsupported by the backend service provided the backend can be health\nchecked. For example, GCE_VM_IP network endpoint groups,\nGCE_VM_IP_PORT network endpoint groups, and instance group backends.\nUSE_NAMED_PORT: Not supported. USE_SERVING_PORT: Provides an\nindirect method of specifying the health check port by referring to\nthe backend service. Only supported by backend services for proxy\nload balancers. Not supported by target pools. Not supported by\nbackend services for pass-through load balancers. Supports all\nbackends that can be health checked; for example, GCE_VM_IP_PORT\nnetwork endpoint groups and instance group backends. For\nGCE_VM_IP_PORT network endpoint group backends, the health check\nuses the port number specified for each endpoint in the network\nendpoint group. For instance group backends, the health check uses\nthe port number determined by looking up the backend service's named\nport in the instance group's list of named ports."]]