[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-09-04 (世界標準時間)。"],[[["\u003cp\u003eBuilt-in identities allow resources to act as principals, enabling them to be granted IAM roles.\u003c/p\u003e\n"],["\u003cp\u003eResources with built-in identities can access other resources without the need for service agents.\u003c/p\u003e\n"],["\u003cp\u003eYou can grant roles to resources with built-in identities by using the resource's principal identifier in your allow policies.\u003c/p\u003e\n"],["\u003cp\u003eIAM provides principal identifiers for both single resources and sets of resources with built-in identities, allowing for flexible role granting.\u003c/p\u003e\n"],["\u003cp\u003eYou can't use built-in identities for authenticating customer-managed workloads.\u003c/p\u003e\n"]]],[],null,["# Built-in identities for resources\n\nThis page describes built-in identities for resources, which let you grant\nroles to resources in your IAM allow policies.\n\nBuilt-in identities\n-------------------\n\nSome resources have built-in identities. These identities let the resources act\nlike [principals](/iam/docs/principals-overview). As a result, resources with built-in identities\ncan do the following:\n\n- Be [granted IAM roles](/iam/docs/granting-changing-revoking-access) using the [resource's\n principal identifier](/iam/docs/resources-with-built-in-identities)\n- Access other resources without using [service agents](/iam/docs/service-account-types#service-agents)\n\nFor example, consider Parameter Manager parameters, which have built-in\nidentities. Parameters sometimes need access to Secret Manager to\nfunction properly. To let a parameter access Secret Manager, you use\nits identifier to grant it the Secret Manager Secret Accessor role\n(`roles/secretmanager.secretAccessor`). Then, the parameter can access\nSecret Manager secrets on your behalf.\n\nFor a list of resources with built-in identities, see [Resources with built-in\nidentities](/iam/docs/resources-with-built-in-identities).\n\nYou can't use a resource's built-in identity to authenticate customer-managed\nworkloads, like workloads running on Compute Engine instances. If you\nneed to authenticate a workload, use one of the methods described in\n[Authentication methods at Google](/docs/authentication).\n\nGranting roles to resources with built-in identities\n----------------------------------------------------\n\nIf a resource has a built-in identity, you can grant roles to the resource by\nincluding the resource's *principal identifier* in your allow policies. To see\nwhat format to use for each resource's principal identifier, see [Principal\nidentifiers for single resources](/iam/docs/resources-with-built-in-identities#single-resources).\n\nIAM also offers identifiers for sets of resources with built-in\nidentities that share certain characteristics, such as type or ancestor. You can\nuse these identifiers in your allow policies to grant the same role to multiple\nresources. To see what formats are supported, see [Principal identifiers for\nsets of resources](/iam/docs/resources-with-built-in-identities#resource-sets)."]]
