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. 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
passthrough 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.HTTP2HealthCheck.PortSpecification)\n- [1.34.0](/python/docs/reference/compute/1.34.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.33.0](/python/docs/reference/compute/1.33.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.32.0](/python/docs/reference/compute/1.32.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.31.0](/python/docs/reference/compute/1.31.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.30.0](/python/docs/reference/compute/1.30.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.29.0](/python/docs/reference/compute/1.29.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.28.0](/python/docs/reference/compute/1.28.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.27.0](/python/docs/reference/compute/1.27.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.26.0](/python/docs/reference/compute/1.26.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.25.0](/python/docs/reference/compute/1.25.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.24.0](/python/docs/reference/compute/1.24.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.23.0](/python/docs/reference/compute/1.23.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.22.0](/python/docs/reference/compute/1.22.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.21.0](/python/docs/reference/compute/1.21.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.20.1](/python/docs/reference/compute/1.20.1/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.19.2](/python/docs/reference/compute/1.19.2/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.18.0](/python/docs/reference/compute/1.18.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.17.0](/python/docs/reference/compute/1.17.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.16.1](/python/docs/reference/compute/1.16.1/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.15.0](/python/docs/reference/compute/1.15.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.14.1](/python/docs/reference/compute/1.14.1/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.13.0](/python/docs/reference/compute/1.13.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.12.1](/python/docs/reference/compute/1.12.1/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.11.0](/python/docs/reference/compute/1.11.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.10.1](/python/docs/reference/compute/1.10.1/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.9.0](/python/docs/reference/compute/1.9.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.8.0](/python/docs/reference/compute/1.8.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.7.0](/python/docs/reference/compute/1.7.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.6.1](/python/docs/reference/compute/1.6.1/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.5.2](/python/docs/reference/compute/1.5.2/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.4.0](/python/docs/reference/compute/1.4.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.3.2](/python/docs/reference/compute/1.3.2/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.2.0](/python/docs/reference/compute/1.2.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.1.0](/python/docs/reference/compute/1.1.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [1.0.0](/python/docs/reference/compute/1.0.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [0.9.0](/python/docs/reference/compute/0.9.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [0.8.0](/python/docs/reference/compute/0.8.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [0.7.0](/python/docs/reference/compute/0.7.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [0.6.0](/python/docs/reference/compute/0.6.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [0.5.0](/python/docs/reference/compute/0.5.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [0.4.2](/python/docs/reference/compute/0.4.2/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [0.3.0](/python/docs/reference/compute/0.3.0/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [0.2.1](/python/docs/reference/compute/0.2.1/google.cloud.compute_v1.types.HTTP2HealthCheck.PortSpecification)\n- [0.1.0](/python/docs/reference/compute/0.1.0/google.cloud.compute_v1.types.HTTP2HealthCheck.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. Not supported by target pools. The health\ncheck supports all backends supported by the backend service\nprovided the backend can be health checked. For example, GCE_VM_IP\nnetwork endpoint groups, GCE_VM_IP_PORT network endpoint groups, and\ninstance group backends. USE_NAMED_PORT: Not supported.\nUSE_SERVING_PORT: Provides an indirect method of specifying the\nhealth check port by referring to the backend service. Only\nsupported by backend services for proxy load balancers. Not\nsupported by target pools. Not supported by backend services for\npassthrough load balancers. Supports all backends that can be health\nchecked; for example, GCE_VM_IP_PORT network endpoint groups and\ninstance group backends. For GCE_VM_IP_PORT network endpoint group\nbackends, the health check uses the port number specified for each\nendpoint in the network endpoint group. For instance group backends,\nthe health check uses the port number determined by looking up the\nbackend service's named port in the instance group's list of named\nports."]]