A network endpoint group (NEG) is a configuration object that specifies a group of backend endpoints or services. A common use case for this configuration is deploying services in containers. You can also distribute traffic in a granular fashion to applications running on your backend instances.
You can use NEGs as backends for some load balancers and with Traffic Director.
Zonal and internet NEGs define how endpoints should be reached, whether they are reachable, and where they are located. Unlike these NEG types, serverless NEGs don't contain endpoints.
A zonal NEG contains one or more endpoints that can be Compute Engine VMs or
services running on the VMs. Each endpoint is specified either by an
IP address or an
An internet NEG contains a single endpoint that is hosted outside of
Google Cloud. This endpoint is specified by hostname
A hybrid connectivity NEG points to Traffic Director services running outside Google Cloud.
|Zonal NEG||Internet NEG||Serverless NEG||Hybrid connectivity NEG|
|Purpose||One or more internal IP address endpoints that resolve to either Compute Engine VM instances or GKE Pods.||A single internet-routable endpoint that is hosted outside of Google Cloud.||A single endpoint within Google's network that resolves to an App Engine, Cloud Functions, or Cloud Run (fully managed) service.||One or more endpoints that resolve to on-premises services, server applications in another cloud, and other internet-reachable services outside Google Cloud.|
|NetworkEndpointType API name||
FQDN belonging to an App Engine, Cloud Functions, or Cloud Run (fully managed) service.
IP:Port belonging to a VM that is not in Compute Engine and that must be routable using hybrid connectivity.
|Number of endpoints||1 or more||1||1||1 or more|
|Health checks for NEGs attached to backend services||Centralized health checking for NEGs with
Not applicable to NEGs with
|Not applicable||Not applicable||Envoy distributed health checking|
|Routing||VPC network||Internet||To Google APIs and Services||Internet|
|Google Cloud products that use this NEG||
||External HTTP(S) Load Balancing:
For more information about zonal, internet, and serverless NEGs, see:
- Zonal network endpoint groups overview
- Internet network endpoint groups overview
- Serverless network endpoint groups overview
- Hybrid connectivity network endpoint groups overview