The value of the host header in the HTTP health check request. If left
empty (default value), the host header is set to the destination IP address
to which health check packets are sent. The destination IP address depends
on the type of load balancer. For details, see:
https://cloud.google.com/load-balancing/docs/health-check-concepts#hc-packet-dest
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 theport 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.
Specifies the type of proxy header to append before sending data to the
backend, either NONE or PROXY_V1. The default
is NONE.
Check the ProxyHeader enum for the list of possible values.
Creates a content-based HTTP health check. In addition to the required
HTTP 200 (OK) status code, you can configure the health check to pass only
when the backend sends this specific ASCII response string within the first
1024 bytes of the HTTP response body. For details, see:
https://cloud.google.com/load-balancing/docs/health-check-concepts#criteria-protocol-http
