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Zorluk: OrtaProvisioning Compute Engine and Kubernetes Engine Clusters

An enterprise media processing team is setting up an automated Deployment Manager pipeline to provision a fleet of Compute Engine instances managed by a regional Managed Instance Group (MIG). The deployment pipeline runs under a dedicated deployment service account `[email protected]`. The Compute Engine instances must run under a separate application runtime service account `[email protected]`. During the initial pipeline run, instance template creation fails with an IAM permission error when attempting to attach `app-runner` to the VM template. Which IAM configuration resolves the deployment failure while adhering to the principle of least privilege?

  1. Grant the Service Account User role (roles/iam.serviceAccountUser) on the app-runner service account to the deploy-sa service account.Cevap
  2. B
    Grant the Service Account Admin role (roles/iam.serviceAccountAdmin) at the project level to the deploy-sa service account.
  3. C
    Grant the Owner primitive role (roles/owner) on the app-runner service account to the deploy-sa service account.
  4. D
    Submit a regional quota increase request for Compute Engine API service account attachments before executing the deployment pipeline.

Cevap

Granting the Service Account User role (`roles/iam.serviceAccountUser`) on the `app-runner` service account to the `deploy-sa` deployment service account allows the deployment pipeline to attach `app-runner` to Compute Engine instances under the principle of least privilege.
To attach a service account to a Compute Engine instance template or VM, the identity running the provisioning job must have the `iam.serviceAccounts.actAs` permission on the target service account. The predefined role `roles/iam.serviceAccountUser` grants this permission. Applying this role at the resource level on the target service account enforces least privilege.

Adım Adım Çözüm

1
Identify the cause of the provisioning failure
The deployment pipeline service account (`deploy-sa`) requires permission to impersonate or bind the runtime service account (`app-runner`) to the compute resources being created.
Compute Engine instance creation requires the acting entity to possess authority to attach the target service account to the virtual machine.
2
Evaluate required IAM roles against the least privilege principle
The `roles/iam.serviceAccountUser` role grants permission to act on behalf of the service account without allowing administrative modifications to IAM policies or key management.
Predefined granular roles prevent over-provisioning security access during automated deployments.
3
Select resource-level binding target
Binding `roles/iam.serviceAccountUser` specifically on the `app-runner` resource (rather than project-wide) limits scope to only the intended runtime identity.
Resource-level IAM bindings restrict access exclusively to the specific identity needed by the deployment pipeline.

Anahtar Kavram

Compute Engine Service Account Impersonation and Attachment Permissions
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Konular

Provisioning Compute Engine and Kubernetes Engine Clusters

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