This page describes the configuration files needed to create a gRPC service that is managed by Endpoints.
As a starting point, this page assumes that you have:
- A Google Cloud project.
- Basic knowledge of configuring a gRPC API service.
- Installed gRPC and the gRPC tools. Read Get started with gRPC for details.
Choosing the service nameCloud Endpoints uses the name you configure in your gRPC API configuration YAML file as the name of your service.
The name of your API service must be unique on Google Cloud. Because Endpoints uses DNS-compatible names to identify services, we recommend that you use your API's domain name or subdomain name as the service name. With this approach, the service name that appears on the Endpoints Services page matches the name used in requests to your API. Additionally, if your service name and domain name are the same, you can create a Cloud Endpoints Portal for your API users. Endpoints has the following requirements for the service name:
- The maximum length of the domain name is 253 characters.
- The domain name must start with a lowercase letter.
Each section in the domain name, which is delimited by dots, has the following
- Must start with a lowercase letter.
- Must not end with a dash.
- The remaining characters can be lowercase letters, numbers, or dashes.
- The maximum length is 63 characters.
You can either register your own custom domain (such as
you can use a domain managed by Google.
Use a domain managed by GoogleGoogle owns and manages the
cloud.googdomain. If you want to use a domain managed by Google, you must use your Google Cloud project ID as part of the service name. Because Google Cloud projects have a globally unique project ID, this requirement ensures that you have a unique service name. If you want to use the
cloud.googdomain, the service name must be in the format, where
YOUR_API_NAMEis the name of your API and
YOUR_PROJECT_IDis your Google Cloud project ID:
To use this domain as the API's domain name, read
Configuring DNS on the
Use a custom domain
If you don't want to use a domain managed by Google, you can use a custom domain
myapi.mycompany.com) that you are authorized to use.
Before you deploy the API configuration, follow the steps in
Verify ownership of the domain.
Configuring the protocol buffer
.protofile for your service. Read the Developer guide
Compile your protocol buffers by using the
protoccompiler for your language. For example:
protoc --proto_path=. \ --include_imports \ --include_source_info \ --descriptor_set_out=api_descriptor.pb \ bookstore.proto
In the preceding command,
--proto_pathis set to the current working directory. In your gRPC build environment, if you use a different directory for
.protoinput files, change
--proto_pathso the compiler searches the directory where you saved your
protoccommand to generate your descriptor file fails, make sure that:
protocversion is up-to-date.
- You specified the
--proto_pathor its short form
-Ifor the root directories for imported
.protofiles. You can find out more in the protocol buffers documentation.
- You specified
If you want your clients to access your gRPC service by using HTTP with JSON, you need to specify how data is translated from HTTP with JSON to gRPC. We recommend that you annotate the APIs defined in your
.protofile. Read Transcoding HTTP/JSON to gRPC for more information.
Configuring the gRPC service configuration file
You need to create a gRPC service configuration YAML file. You specify the name
of the service and usage restrictions, such as requiring an API key in this file.
You can use the
api_config.yaml file from the Bookstore sample as a model.
Save a copy of
Enter the name of your service in the
namefield. For example:
Enter the title that is displayed on the Endpoints > Services page in the Cloud Console. For example:
title: Bookstore gRPC API
Enter the API name in the
apis:namefield. The text that you enter must exactly match the fully-qualified API name from your
.protofile. For example:
apis: - name: endpoints.examples.bookstore.Bookstore
Configure the rest of the file. For example:
# # API usage restrictions. # usage: rules: # ListShelves methods can be called without an API Key. - selector: endpoints.examples.bookstore.Bookstore.ListShelves allow_unregistered_calls: true
Read Rules and selectors for more information.
Additional gRPC samples
- Java version of the Bookstore sample.
getting-started-grpcsample is available on GitHub in the following languages: