Abilita IAP per Compute Engine

Questa pagina spiega come proteggere un'istanza Compute Engine con Identity-Aware Proxy (IAP).

Prima di iniziare

Per abilitare IAP per Compute Engine, devi disporre di:

Se non hai ancora configurato l'istanza Compute Engine, consulta Configurazione di IAP per Compute Engine per una procedura dettagliata completa.

IAP utilizza un client OAuth gestito da Google per autenticare gli utenti. Solo gli utenti all'interno dell'organizzazione possono accedere all'applicazione abilitata per IAP. Se vuoi consentire l'accesso a utenti esterni alla tua organizzazione, consulta Abilita IAP per le applicazioni esterne.

Puoi attivare IAP su un servizio di backend di Compute Engine o su una regola di forwarding di Compute Engine. Quando abiliti IAP su un servizio di backend di Compute Engine, solo quel servizio di backend è protetto da IAP. Quando attivi IAP su una regola di forwarding di Compute Engine, tutte le istanze di Compute Engine dietro la regola di forwarding sono protette da IAP.

Abilita IAP su una regola di forwarding

Puoi attivare IAP su una regola di forwarding utilizzando il framework delle policy di autorizzazione del bilanciatore del carico.

gcloud

  1. Esegui il comando seguente per preparare un file policy.yaml. La policy consente ai client con un intervallo di indirizzi IP 10.0.0.0/24 di attivare IAP su una regola di forwarding.
$ cat << EOF > policy.yaml
action: CUSTOM
description: authz policy with Cloud IAP
name: AUTHZ_POLICY_NAME
httpRules:
  - from:
      sources:
      - ipBlocks:
        - prefix: "10.0.0.0"
          length: 24
customProvider:
  cloudIap: {}
target:
  loadBalancingScheme: EXTERNAL_MANAGED
  resources:
  - https://www.googleapis.com/compute/v1/projects/PROJECT_ID/regions/LOCATION/forwardingRules/FORWARDING_RULE_ID
EOF
  1. Esegui questo comando per attivare IAP su una regola di forwarding.
gcloud network-security authz-policies import AUTHZ_POLICY_NAME \
--source=policy.yaml \
--location=LOCATION \
--project=PROJECT_ID

Sostituisci quanto segue:

  • PROJECT_ID: l'ID progetto Google Cloud .
  • LOCATION: la regione in cui si trova la risorsa.
  • FORWARDING_RULE_ID: l'ID della risorsa della regola di forwarding.
  • AUTHZ_POLICY_NAME: il nome della policy di autorizzazione.

API

  1. Esegui il comando seguente per preparare un file policy.json. 
    cat << EOF > policy.json
{
"name": "AUTHZ_POLICY_NAME",
"target": {
  "loadBalancingScheme": "INTERNAL_MANAGED",
  "resources": [
    "https://www.googleapis.com/compute/v1/projects/PROJECT_ID/regions/LOCATION/forwardingRules/FORWARDING_RULE_ID"
  ],
},
"action": "CUSTOM",
"httpRules": [
  {
    "from": {
      "sources": {
        "ipBlocks": [
          {
            "prefix": "10.0.0.0",
            "length": 24
          }
        ]
      }
    }
  }
],
"customProvider": {
  "cloudIap": {}
}
}
EOF

  2. Esegui questo comando per attivare IAP su una regola di forwarding. 

    curl -X PATCH \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Accept: application/json" \
-H "Content-Type: application/json" \
-d @policy.json \
"https://networksecurity.googleapis.com/v1/projects/PROJECT_ID/locations/LOCATION/authzPolicies"

    Sostituisci quanto segue:

    • PROJECT_ID: l'ID progetto Google Cloud .
    • LOCATION: la regione in cui si trova la risorsa.
    • FORWARDING_RULE_ID: l'ID della risorsa della regola di forwarding.
    • AUTHZ_POLICY_NAME: il nome della policy di autorizzazione.

Dopo aver attivato IAP su una regola di forwarding, puoi applicare le autorizzazioni alle risorse.

Abilita IAP su un servizio di backend di Compute Engine

Puoi attivare IAP su un servizio di backend Compute Engine tramite il servizio di backend.

console

Il client OAuth gestito da Google non è disponibile quando attivi IAP utilizzando la consoleGoogle Cloud .

If you haven't configured your project's OAuth consent screen, you'll be prompted to do so. To configure your OAuth consent screen, see Setting up your OAuth consent screen.

If you are running GKE version 1.24 or later, you can configure IAP and GKE by using the Kubernetes Gateway API. To do so, complete the following steps and then follow the instructions in Configure IAP. Do not configure BackendConfig.

Setting up IAP access

  1. Go to the Identity-Aware Proxy page.
    Go to the Identity-Aware Proxy page
  2. Select the project you want to secure with IAP.

  3. Select the checkbox next to the resource you want to grant access to.

    If you don't see a resource, ensure that the resource is created and that the BackendConfig and Compute Engine ingress controller are synced.

    To verify that the backend service is available, run the following gcloud command:

    gcloud compute backend-services list
  4. On the right side panel, click Add principal.
  5. In the Add principals dialog that appears, enter the email addresses of groups or individuals who should have the IAP-secured Web App User role for the project.

    The following kinds of principals can have this role:

    • Google Account: user@gmail.com
    • Google Group: admins@googlegroups.com
    • Service account: server@example.
    • Google Workspace domain: example.com

    Make sure to add a Google Account that you have access to.

  6. Select Cloud IAP > IAP-secured Web App User from the Roles drop-down list.
  7. Click Save.

Turning on IAP

  1. On the Identity-Aware Proxy page, under APPLICATIONS, find the load balancer that serves the instance group you want to restrict access to. To turn on IAP for a resource,
    To enable IAP:
    • At least one protocol in the load balancer frontend configuration must be HTTPS. Learn about setting up a load balancer.
    • You need the compute.backendServices.update, clientauthconfig.clients.create, clientauthconfig.clients.update, and clientauthconfig.clients.getWithSecret permissions. These permissions are granted by roles, such as the Project Editor role. To learn more, see Managing access to IAP-secured resources.
  2. In the Turn on IAP window that appears, click Turn On to confirm that you want IAP to secure your resource. After you turn on IAP, it requires login credentials for all connections to your load balancer. Only accounts with the IAP-Secured Web App User role on the project will be given access.

gcloud

Before you set up your project and IAP, you need an up-to-date version of the gcloud CLI. For instructions on how to install the gcloud CLI, see Install the gcloud CLI.

  1. To authenticate, use the Google Cloud CLI and run the following command. 
    gcloud auth login
  2. To sign in, follow the URL that appears.
  3. After you sign in, copy the verification code that appears and paste it in the command line.
  4. Run the following command to specify the project that contains the resource that you want to protect with IAP. 
    gcloud config set project PROJECT_ID
  5. To enable IAP, run either the globally or regionally scoped command.

    Global scope 
    gcloud compute backend-services update BACKEND_SERVICE_NAME --global --iap=enabled
     Regional scope 
    gcloud compute backend-services update BACKEND_SERVICE_NAME --region REGION_NAME --iap=enabled

After you enable IAP, you can use the gcloud CLI to modify the IAP access policy using the IAM role roles/iap.httpsResourceAccessor. Learn more about managing roles and permissions.

API

  1. Run the following command to prepare a settings.json file. 

    cat << EOF > settings.json
{
"iap":
  {
    "enabled":true
  }
}
EOF

  2. Run the following command to enable IAP. 

    curl -X PATCH \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Accept: application/json" \
-H "Content-Type: application/json" \
-d @settings.json \
"https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/REGION/backendServices/BACKEND_SERVICE_NAME"

After you enable IAP, you can use the Google Cloud CLI to modify the IAP access policy using the IAM role roles/iap.httpsResourceAccessor. Learn more about managing roles and permissions.