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When you deploy your source code to Cloud Run, that source
is stored in a Cloud Storage bucket. Cloud Build then
automatically builds your code into a container image and pushes that image to
an image registry. Each build runs on its own worker. Cloud Run
imports the built image when deploying.
If you wanted to customize the build worker pool that Cloud Build
uses for a VPC Service Controls secured build context, you would customize the
worker pool. This page is relevant for platform developers who are deploying
Cloud Runservicesorfunctionsfrom source using the Google Cloud CLI,
and configuring private pools that are used by Cloud Build. The build
worker pools gcloud CLI flags are supported forsource deployments(--source), and not
supported forcontainer image deployments(--image).
Before you begin
Enable the Cloud Run Admin API and the Cloud Build API:
Service Account User(roles/iam.serviceAccountUser) on the Cloud Run service identity
Click to view required roles for the Cloud Build service account
Cloud Build automatically uses theCompute Engine default service
accountas the default Cloud Build service account to build your source code and
Cloud Run resource, unless you override this behavior. For
Cloud Build to build your sources, ask your administrator to grantCloud Run Builder(roles/run.builder) to the Compute Engine default
service account on your project:
ReplacePROJECT_NUMBERwith your Google Cloud
project number, andPROJECT_IDwith your Google Cloud
project ID. For detailed instructions on how to find your project ID, and project number,
seeCreating
and managing projects.
Granting the Cloud Run builder role to the Compute Engine default service account
takes a couple of minutes topropagate.
By default, Cloud Build has unlimited internet access during the build
process. If you have set up a VPC Service Controls (VPC SC) perimeter and want to
limit the build's access only to dependencies stored inside the perimeter (for
example, npm packages), you can use theCloud Build private worker poolsfeature.
In general, follow these steps to set up your private pool:
If your private worker pool is in a different project than your
Cloud Run service, you need to grant the Cloud RunService Agent(service-PROJECT_NUMBER@serverless-robot-prod.iam.gserviceaccount.com)
theCloud Build WorkerPool User(cloudbuild.workerPoolUser) role so that the Cloud Build service can
access the worker pool.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Set build worker pools (source deploy)\n\nWhen you deploy your source code to Cloud Run, that source\nis stored in a Cloud Storage bucket. Cloud Build then\nautomatically builds your code into a container image and pushes that image to\nan image registry. Each build runs on its own worker. Cloud Run\nimports the built image when deploying.\n\nIf you wanted to customize the build worker pool that Cloud Build\nuses for a VPC Service Controls secured build context, you would customize the\nworker pool. This page is relevant for platform developers who are deploying\nCloud Run [services](/run/docs/deploying-source-code) or\n[functions](/run/docs/deploy-functions) from source using the Google Cloud CLI,\nand configuring private pools that are used by Cloud Build. The build\nworker pools gcloud CLI flags are supported for\n[source deployments](/run/docs/deploying-source-code) (`--source`), and not\nsupported for [container image deployments](/run/docs/deploying) (`--image`).\n\nBefore you begin\n----------------\n\n- Enable the Cloud Run Admin API and the Cloud Build API:\n\n ```bash\n gcloud services enable run.googleapis.com \\\n cloudbuild.googleapis.com\n ```\n\n After the Cloud Run Admin API is enabled, the Compute Engine default service account is\n automatically created.\n\n### Required roles\n\nYou or your administrator must grant the deployer account and the\nCloud Build service account the following IAM roles. \n\n#### Click to view required roles for the deployer account\n\nTo get the permissions that you need to build and deploy from source,\nask your administrator to grant you the following IAM\nroles:\n\n- [Cloud Run Source Developer](/iam/docs/understanding-roles#run.sourceDeveloper) (`roles/run.sourceDeveloper`) on your project\n- [Service Usage Consumer](/iam/docs/understanding-roles#serviceusage.serviceUsageConsumer) (`roles/serviceusage.serviceUsageConsumer`) on your project\n- [Service Account User](/iam/docs/understanding-roles#iam.serviceAccountUser) (`roles/iam.serviceAccountUser`) on the Cloud Run service identity \n\n#### Click to view required roles for the Cloud Build service account\n\nCloud Build automatically uses the\n[Compute Engine default service\naccount](/build/docs/cloud-build-service-account) as the default Cloud Build service account to build your source code and\nCloud Run resource, unless you override this behavior. For\nCloud Build to build your sources, ask your administrator to grant\n[Cloud Run Builder](/iam/docs/understanding-roles#run.builder)\n(`roles/run.builder`) to the Compute Engine default\nservice account on your project: \n\n```bash\n gcloud projects add-iam-policy-binding PROJECT_ID \\\n --member=serviceAccount:PROJECT_NUMBER-compute@developer.gserviceaccount.com \\\n --role=roles/run.builder\n \n```\n\nReplace \u003cvar translate=\"no\"\u003ePROJECT_NUMBER\u003c/var\u003e with your Google Cloud\nproject number, and \u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e with your Google Cloud\nproject ID. For detailed instructions on how to find your project ID, and project number,\nsee [Creating\nand managing projects](/resource-manager/docs/creating-managing-projects#identifying_projects).\n\nGranting the Cloud Run builder role to the Compute Engine default service account\ntakes a couple of minutes to [propagate](/iam/docs/access-change-propagation).\n| **Note:**\n|\n|\n| The [`iam.automaticIamGrantsForDefaultServiceAccounts` organization policy constraint](/resource-manager/docs/organization-policy/restricting-service-accounts#disable_service_account_default_grants)\n| prevents the Editor role from being automatically granted to default service accounts. If you\n| created your organization after May 3, 2024, this constraint is enforced by\n| default.\n|\n|\n| We strongly recommend that you enforce this constraint to disable the automatic role grant. If you\n| disable the automatic role grant, you must decide which roles to grant to the default service\n| accounts, and then [grant these roles](/iam/docs/granting-changing-revoking-access)\n| yourself.\n|\n|\n| If the default service account already has the Editor role, we recommend that you replace the\n| Editor role with less permissive roles.To safely modify the service account's roles, use [Policy Simulator](/policy-intelligence/docs/simulate-iam-policies) to see the impact of\n| the change, and then [grant and revoke the\n| appropriate roles](/iam/docs/granting-changing-revoking-access).\n\nFor a list of IAM roles and permissions that are associated with\nCloud Run, see\n[Cloud Run IAM roles](/run/docs/reference/iam/roles)\nand [Cloud Run IAM permissions](/run/docs/reference/iam/permissions).\nIf your Cloud Run service interfaces with\nGoogle Cloud APIs, such as Cloud Client Libraries, see the\n[service identity configuration guide](/run/docs/configuring/services/service-identity).\nFor more information about granting roles, see\n[deployment permissions](/run/docs/reference/iam/roles#additional-configuration)\nand [manage access](/iam/docs/granting-changing-revoking-access).\n\nSecure your build with private pools\n------------------------------------\n\nBy default, Cloud Build has unlimited internet access during the build\nprocess. If you have set up a VPC Service Controls (VPC SC) perimeter and want to\nlimit the build's access only to dependencies stored inside the perimeter (for\nexample, npm packages), you can use the\n[Cloud Build private worker pools](/build/docs/private-pools/private-pools-overview)\nfeature.\n\nIn general, follow these steps to set up your private pool:\n\n1. Create your private worker pool. See [Creating and managing private pools](/build/docs/private-pools/create-manage-private-pools).\n2. Configure your VPC Service Controls perimeter. See\n [Using VPC Service Controls](/build/docs/private-pools/using-vpc-service-controls).\n\n3. If your private worker pool is in a different project than your\n Cloud Run service, you need to grant the Cloud Run\n [Service Agent](/iam/docs/service-agents)\n (`service-`\u003cvar translate=\"no\"\u003ePROJECT_NUMBER\u003c/var\u003e`@serverless-robot-prod.iam.gserviceaccount.com`)\n the [Cloud Build WorkerPool User](/iam/docs/understanding-roles#cloudbuild.workerPoolUser)\n (`cloudbuild.workerPoolUser`) role so that the Cloud Build service can\n access the worker pool.\n\n ```bash\n gcloud projects add-iam-policy-binding PRIVATE_POOL_PROJECT_ID \\\n --member serviceAccount:service-PROJECT_NUMBER@serverless-robot-prod.iam.gserviceaccount.com \\\n --role roles/cloudbuild.workerPoolUser\n ```\n\n Replace:\n - \u003cvar translate=\"no\"\u003ePROJECT_NUMBER\u003c/var\u003e with the project number where the service runs.\n - \u003cvar translate=\"no\"\u003ePRIVATE_POOL_PROJECT_ID\u003c/var\u003e with the *ID* of the project in which the worker pool is located. See [Running builds in a private pool](/build/docs/private-pools/run-builds-in-private-pool#permissions) for more information.\n4. Deploy your service from source to build using a private pool:\n\n ### gcloud\n\n To specify a private pool to build when deploying from source\n code, use the `--build-worker-pool` flag: \n\n ```bash\n gcloud run deploy SERVICE \\\n --source . \\\n --build-worker-pool WORKER_POOL\n ```\n\n Replace:\n - \u003cvar translate=\"no\"\u003eSERVICE\u003c/var\u003e with name of your service.\n - \u003cvar translate=\"no\"\u003eWORKER_POOL\u003c/var\u003e with the name of the private pool.\n\n If you are deploying a function, add the `--function` flag with the\n function entry point from your source code.\n\nDelete build worker pools\n-------------------------\n\nYou can delete build worker pools for existing services. \n\n### gcloud\n\nTo clear the Cloud Build worker pool for source deployments, use\nthe `--clear-build-worker-pool` flag: \n\n```bash\ngcloud run deploy SERVICE \\\n --source . \\\n --clear-build-worker-pool WORKER_POOL\n```\n\nReplace:\n\n- \u003cvar translate=\"no\"\u003eSERVICE\u003c/var\u003e with name of your service.\n- \u003cvar translate=\"no\"\u003eWORKER_POOL\u003c/var\u003e with the name of the private pool you would like to delete.\n\nIf you are deploying a function, add the `--function` flag with the\nfunction entry point from your source code."]]
