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AzureRole

What is AzureRole

An AzureRole is a Kubernetes CustomResourceDefinition (CRD) which allows a user to create an Azure secret engine role in a Kubernetes native way.

When an AzureRole is created, the KubeVault operator configures a Vault role. A role may be set up with either an existing service principal or a set of Azure roles that will be assigned to a dynamically created service principal. If the user deletes the AzureRole CRD, then the respective role will also be deleted from Vault.

AzureRole CRD

AzureRole CRD Specification

Like any official Kubernetes resource, a AzureRole object has TypeMeta, ObjectMeta, Spec and Status sections.

A sample AzureRole object is shown below:

apiVersion: engine.kubevault.com/v1alpha1
kind: AzureRole
metadata:
  name: azure-role
  namespace: demo
spec:
  secretEngineRef:
    name: azure-secret-engine
  azureRoles: `[
              {
                "role_name": "Contributor",
                "scope":  "/subscriptions/<uuid>/resourceGroups/Website"
            }
          ]`
  applicationObjectID: c1cb042d-96d7-423a-8dba-243c2e5010d3
status:
  observedGeneration: 1
  phase: Success

Note: To resolve the naming conflict, name of the role in Vault will follow this format: k8s.{clusterName}.{metadata.namespace}.{metadata.name}

Here, we are going to describe the various sections of the AzureRole crd.

AzureRole Spec

AzureRole spec contains either new service principal configuration or existing service principal name required for configuring a role.

spec:
  secretEngineRef:
    name: <azure-secret-engine>
  path: <azure-secret-engine-path>
  applicationObjectID: <existing-application-object-id>
  azureRoles: <list-of-azure-roles>
  ttl: <default-ttl>
  maxTTL: <max-ttl>

AzureRole spec has the following fields:

spec.secretEngineRef

spec.secretEngineRef is a required field that specifies the name of an AppBinding reference which is used to connect with a Vault server. AppBinding must be in the same namespace with the AzureRole object.

spec:
  secretEngineRef:
    name: azure-secret-engine

spec.path

spec.path is an optional field that specifies the path where the secret engine is enabled. The default path value is azure.

spec:
  path: my-azure-path

spec.azureRoles

spec.azureRoles is an optional field that specifies a list of Azure roles to be assigned to the generated service principal. The array must be in JSON format, properly escaped as a string.

spec:
  azureRoles: `[
                 {
                    "role_name": "Contributor",
                    "scope":  "/subscriptions/<uuid>/resourceGroups/Website"
                }
              ]`

spec.applicationObjectID

spec.applicationObjectID is an optional field that specifies the Application Object ID for an existing service principal that will be used instead of creating dynamic service principals. If present, azure_roles will be ignored. See roles docs for details on role definition.

spec:
  applicationObjectID: c1cb042d-96d7-423a-8dba-243c2e5010d3

spec.ttl

Specifies the default TTL for service principals generated using this role. Accepts time suffixed strings (“1h”) or an integer number of seconds. Defaults to the system/engine default TTL time.

spec:
  ttl: 1h

spec.maxTTL

Specifies the maximum TTL for service principals generated using this role. Accepts time suffixed strings (“1h”) or an integer number of seconds. Defaults to the system/engine max TTL time.

spec:
  maxTTL: 1h

AzureRole Status

status shows the status of the AzureRole. It is managed by the KubeVault operator. It contains the following fields:

  • observedGeneration: Specifies the most recent generation observed for this resource. It corresponds to the resource’s generation, which is updated on mutation by the API Server.

  • phase: Indicates whether the role successfully applied to Vault or not.

  • conditions : Represent observations of an AzureRole.