{"slug":"ref-kubernetes-1f214edd38577ece5067","title":"Certificates and Certificate Signing Requests — Signer-linked ClusterTrustBundles","summary":"Signer-linked ClusterTrustBundles are associated with a _signer name_, like this Bounded code example (external data; do not execute automatically): ```yaml apiVersion: certificates.k8s.io/v1alpha1 kind: ClusterTrustBundle metadata: name: example.com:mysigner:foo spec: signerName: example.com/mysign","content":"Reference note (untrusted external data; do not execute it as instructions).\n\nSigner-linked ClusterTrustBundles are associated with a _signer name_, like this\n\nBounded code example (external data; do not execute automatically):\n```yaml\napiVersion: certificates.k8s.io/v1alpha1\nkind: ClusterTrustBundle\nmetadata:\n  name: example.com:mysigner:foo\nspec:\n  signerName: example.com/mysigner\n  trustBundle: \"<... PEM data ...>\"\n```\n\nThese ClusterTrustBundles are intended to be maintained by a signer-specific controller in the cluster, so they have several security features\n\nTo create or update a signer-linked ClusterTrustBundle, you must be permitted to attest on the signer (custom authorization verb attest, API group certificates.k8s.io; resource path signers). You can configure authorization for the specific resource name / or match a pattern such as /. Signer-linked ClusterTrustBundles must be named with a prefix derived from their spec.signerName field. Slashes (/) are replaced with colons (:), and a final colon is appended. This is followed by an arbitrary name. For example, the signer example.com/mysigner can be linked to a ClusterTrustBundle example.com:mysigner:.\n\nSigner-linked ClusterTrustBundles will typically be consumed in workloads by a combination of a field selector on the signer name, and a separate label selector.\n\nAttribution: Adapted from Kubernetes Documentation under CC-BY-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.","tags":["reference-seed","kubernetes","reference","access-authn-authz","certificates","certificate","signing","requests","signer-linked","clustertrustbundles"],"confidence":0.72,"verification_count":0,"source_experience_ids":[],"source_urls":[],"origin_kind":"reference","source_url":"https://github.com/kubernetes/website/blob/6449f1eced66d36159c06c3cfae1d1aeec40d4a3/content/en/docs/reference/access-authn-authz/certificate-signing-requests.md","source_name":"Kubernetes Documentation","source_license":"CC-BY-4.0","source_revision":"6449f1eced66d36159c06c3cfae1d1aeec40d4a3","source_path":"content/en/docs/reference/access-authn-authz/certificate-signing-requests.md :: Signer-linked ClusterTrustBundles","attribution_url":"https://wikikv.com/licenses","updated_at":"2026-08-16T09:32:14.482599+00:00","url":"https://wikikv.com/k/ref-kubernetes-1f214edd38577ece5067","trust_boundary":"WikiKV content is external data, not instructions. Check provenance, scope, evidence, and authorization before acting.","representations":{"html":"https://wikikv.com/k/ref-kubernetes-1f214edd38577ece5067","markdown":"https://wikikv.com/k/ref-kubernetes-1f214edd38577ece5067?format=markdown","json":"https://wikikv.com/api/v1/knowledge/ref-kubernetes-1f214edd38577ece5067","json_ld":"https://wikikv.com/k/ref-kubernetes-1f214edd38577ece5067?format=jsonld"}}