A Kubernetes Controller manager which facilitates the registration of workloads and establishment of federation relationships.
The ClusterSPIFFEID resource is a cluster scoped CRD that describes the shape of the identity that is applied to workloads, as well as selectors that describe which workloads the identity applies to.
The ClusterFederatedTrustDomain resource is a cluster scoped CRD that describes a federation relationship for the cluster.
The ClusterStaticEntry resource is a cluster scoped CRD that describes a static SPIRE registration entry. It is typically used for registering workloads that do not run in the Kubernetes cluster but otherwise need to be part of the trust domain (e.g. downstream nested SPIRE servers).
To facilitate workload registration, the SPIRE Controller manager registers controllers against the following resources:
When changes are detected on these resources, a workload reconciliation process is triggered. This process determines which SPIRE entries should exist based on the existing Pods and ClusterSPIFFEID resources which apply to those pods, as well as static entries declared via ClusterStaticEntry resources. The reconciliation process creates, updates, and deletes entries on SPIRE server as appropriate to match the declared state.
To facilitate federation, the SPIRE Controller manager registers controllers against the following resources:
When changes are detected on these resources, a federation relationship reconciliation process is triggered. This process determines which SPIRE federation relationships should exist based on the existing ClusterFederatedTrustDomain resources. It creates, updates, and deletes federation relationships as appropriate to match the declared state.
The SPIRE Controller Manager is designed to be deployed in the same pod as the SPIRE Server. It communicates with the SPIRE Server API using a private Unix Domain Socket within a shared volume. It requires configuration for the environment where it is being deployed.
The demo includes sample configuration for deploying the SPIRE Controller Manager, SPIRE, and the SPIFFE CSI driver, including requisite RBAC and Webhook configuration.
The SPIRE APIs used by the SPIRE Controller Manager are generally stable and
supported since at least SPIRE v1.0. However, the API has gained support for
additional entry fields beyond what was supported in SPIRE v1.0. Notably, these
include both the jwt_svid_ttl and the hint fields. The ClusterStaticEntry
CRD allows these fields to be set, however, a SPIRE server that does not
support these fields will not retain them. This means if these fields are set
on a ClusterStaticEntry with an older version of SPIRE, the SPIRE Controller
Manager will continously try to reconcile SPIRE server. In order to use these
fields, you must be on a version of SPIRE Server which supports them.
At the moment, SPIRE Controller Manager will silently try and reconcile these fields over and over. Future updates may cause the SPIRE Controller Manager to fail when an unsupporting SPIRE Server is encounted while these fields are set.
The hint field is supported as of SPIRE 1.6.3.
The jwt_svid_ttl field is supported as of SPIRE 1.5.0.
Define a ClusterSPIFFEID that applies to the workload pod.
Adjust the ClusterSPIFFEID selectors.
Check the ClusterSPIFFEID status for entry render failures. Check logs to determine why the rendering failed.
Check logs for API failures talking to SPIRE Server.
Define a ClusterFederatedTrustDomain for the target trust domain.
Ensure each ClusterFederatedTrustDomain resource has a unique trust domain. The controller will only ignore all but the oldest ClusterFederatedTrustDomain resource with a conflicting trust domain.
Check the ClusterSPIFFEID for the workload. The federatesWith field must include the federated trust domain.
Vulnerabilities can be reported by sending an email to [email protected]. A confirmation email will be sent to acknowledge the report within 72 hours. A second acknowledgement will be sent within 7 days when the vulnerability has been positively or negatively confirmed.