[ホストとパスのルール] は設定を変更する必要はありません。デフォルトの一致しないものフィルタを利用すれば、使用しているバックエンドの API に必要なものを転送できます。つまり、ロードバランサにあるすべてのトラフィックは、前の手順で定義したポート 8080（デフォルト ポート）の API に送信されるということです。
[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["わかりにくい","hardToUnderstand","thumb-down"],["情報またはサンプルコードが不正確","incorrectInformationOrSampleCode","thumb-down"],["必要な情報 / サンプルがない","missingTheInformationSamplesINeed","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2025-09-04 UTC。"],[[["\u003cp\u003eThis guide outlines the process of serving an API from a custom domain, such as \u003ccode\u003eexample.com\u003c/code\u003e, as an alternative to using a domain managed by Google.\u003c/p\u003e\n"],["\u003cp\u003eBefore configuring a custom domain, you must acquire a domain name, verify domain ownership, name your API host, obtain an SSL certificate if using SSL, and deploy your API and Extensible Service Proxy (ESP).\u003c/p\u003e\n"],["\u003cp\u003eFor App Engine, you can set your API project to use your verified domain by adding a custom domain for your application.\u003c/p\u003e\n"],["\u003cp\u003eFor Compute Engine, serving an API requires reserving a static external IP address, creating an A record with your API name, creating an instance group, and configuring an HTTP(S) load balancer.\u003c/p\u003e\n"],["\u003cp\u003eFor Google Kubernetes Engine (GKE), you must expose ESP as a service, obtain a static external IP address, and create an A record to direct traffic to your API.\u003c/p\u003e\n"]]],[],null,["# Serving an API from your domain name\n\nOpenAPI \\| [gRPC](/endpoints/docs/grpc/serving-apis-from-domains \"View this page for the Cloud Endpoints gRPC docs\")\n\n\u003cbr /\u003e\n\nThis page shows how to serve an API from a custom domain that you own, for\nexample, `example.com`.\n\nAs an alternative to using your own domain name, you can use a domain name\nmanaged by Google. See\n[Using a domain managed by Google](/endpoints/docs/openapi/configure-endpoints#using_a_domain_managed_by_google)\nfor more information.\n\nBefore you begin\n----------------\n\n- Obtain a domain name from a domain name registrar if you don't already have a domain name to use for your API.\n- [Verify domain ownership](/endpoints/docs/openapi/verify-domain-name).\n- [Name your API host name](/endpoints/docs/openapi/configure-endpoints) with your domain name.\n- If you are using SSL with your domain, obtain and upload your SSL certificate.\n- [Deploy your API and Extensible Service Proxy (ESP)](/endpoints/docs/openapi/deploy-api-backend).\n\nConfigure your API project to use your domain name\n--------------------------------------------------\n\nFollow the instructions in the appropriate tab. \n\n### App Engine\n\nTo set your API project to use your verified domain, follow the instructions\nprovided in\n[Adding a custom domain for your application](/appengine/docs/flexible/python/using-custom-domains-and-ssl)\n\n### Compute Engine\n\nThe recommended way to serve an API from Compute Engine instances is\nto use a load balancer across an instance group. You need to reserve an\nexternal IP address for the domain name and use that external IP address for\nthe load balancer.\n\nTo serve the API from a domain name:\n\n1. Reserve at least one static external IP address in your project: \n\n [Go to the External IP Addresses page](https://console.cloud.google.com/networking/addresses/add)\n 1. Assign any name you want to the reserved IP address\n 2. For **Type** , click **Global**.\n 3. For **Attached to** , click **None**. You attach the IP address to a load balancer later.\n2. Visit your domain provider account and edit your domain settings. You must create an *A record* that contains your API name, for example, `myapi.example.com` with the external IP address in its data field\n3. Create an instance group that includes the instances running your API and Extensible Service Proxy (ESP: \n\n [Go to the Create a New Instance group page](https://console.cloud.google.com/compute/instanceGroups/add)\n 1. Assign any name you want for the group and add a description.\n 2. From the **Zone** list, click the zone used by your API instance.\n 3. In the **Instance definition** list, click **Select existing instances**\n 4. In the **VM Instances** field, add the VM instance running the API.\n 5. Click **Create**.\n4. Create and configure an HTTP(S) load balancer: \n\n [Go to the Create a New HTTP(S) load balancer page](https://console.cloud.google.com/networking/loadbalancing/http/add)\n 1. Click **Define a Backend Service** \\\u003e **Create or select a backend service** . \n 2. Assign any name and description you want for this backend service configuration.\n 3. In the **Protocol** field, select the protocol you want to support through the load balancer, **HTTP** or **HTTPS**.\n 4. In the **Instance group** list, click your instance group.\n 5. In the **Port Numbers** field, enter `8080`.\n 6. Click **Health check** to configure health checks:\n - Enter a name for the health check configuration.\n - Assign the port `8080`.\n - To accept the remaining default values, click **Save**.\n 7. For now, accept the defaults for the rest of the configuration. You can make changes later as needed, such as additional ports.\n 8. You don't need to set anything in the **Host and path rules** ; you can forward everything to your backend API by using the default **Any unmatched** filters. This means that all traffic into the load balancer is directed to the API on the port `8080` (the default port) as defined in the preceding steps.\n 9. Click **Frontend configuration** . \n - In the **Protocol** field, select the protocol you want to support through the load balancer, **HTTP** or **HTTPS**.\n - In the **IP** list, click the external IP address you created earlier.\n - For the HTTPS protocol, you need to use SSL. In the **Certificate** list, click the certificate you want.\n - Optionally, if you want to support another protocol, click **Add frontend IP and port**, specify the protocol, the same external IP address, and a different port.\n 10. To create the fully configured load balancer, click **Create** . If the **Create** button isn't enabled, check the components you just configured: a checkmark should appear beside each of the configuration components. A missing checkmark means you haven't completed the configuration.\n 11. After your DNS changes propagate, requests are sent to your API by using the load balancer.\n | **Note:** If requests aren't making it through to your API backend, check your project's [firewall rules](https://console.cloud.google.com/networking/firewalls/list) to make sure your instances can accept traffic on the default ESP port `8080`. For more information, see [Firewalls](/compute/docs/networking#firewalls).\n\n### GKE\n\nTo serve an API over a domain for\nGoogle Kubernetes Engine (GKE), you need to\nexpose ESP as a service, by using the returned external IP\naddress for your domain's DNS settings. Note that GKE\nautomatically does load balancing for you.\n\nTo expose your API as a service:\n\n1. If you don't have one already, [Configure a Kubernetes service](https://kubernetes.io/docs/tasks/access-application-cluster/connecting-frontend-backend/) for your API backends. Create a service configuration file, `service.yaml`, with content similar to the following: \n\n ```\n apiVersion: v1\n kind: Service\n metadata:\n name: echo\n spec:\n ports:\n - port: 80\n targetPort: 8081\n protocol: TCP\n selector:\n app: echo-app\n type: LoadBalancer\n \n ```\n - Change the `selector` label to match your backend labels (`app: echo-app` in this example)\n - Make sure the `targetPort` matches the port used by ESP configured in your API backends. ESP uses port `8081` by default.\n2. Deploy the Kubernetes service: \n\n ```\n kubectl apply -f service.yaml\n \n ```\n3. View the external IP address assigned to your exposed service: \n\n ```\n kubectl get services\n \n ```\n The output displays an `EXTERNAL-IP` address similar to the following: \n\n ```\n NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE\n hello-node 10.X.XXX.202 10X.XXX.XX.123 8080/TCP 1m\n \n ```\n | **Note:** It takes awhile for the API to be exposed as a service, and the external IP isn't visible until this process is complete. So you might have to run `kubectl get services` several times before you see the IP address.\n4. Change the generated external IP from ephemeral to static. \n\n [Go to the External IP Addresses page](https://console.cloud.google.com/networking/addresses/list)\n 1. Select your external IP address from the list.\n 2. In the **Type** list, click **Static**.\n5. Visit your domain provider account and edit your domain settings. You must create an *A record* that contains your API name, for example, `myapi.example.com`, with the external IP address in its data field.\n\nWhat's next\n-----------\n\n- [Serving multiple APIs from a domain](/endpoints/docs/openapi/deploying-apis-subdomains)"]]
