azureblog.co.uk
← cd ~/roles
// roles/azure · containers

Azure Kubernetes Service RBAC Cluster AdminAzure built-in role

Lets you manage all resources in the cluster.

Role IDb1ff04bb-8a4e-4dc4-8eb5-8693973ce19b
CategoryContainers
Actions5
Data actions1

Before you assign it

  • It reaches the data, not just the resource. It has 1 data action, such as reading blobs, secrets or messages.

What it can do

PermissionWhat it allows
Microsoft.Authorization/*/readAny read operation on anything under Microsoft.Authorization
Microsoft.Resources/subscriptions/operationresults/readGet the subscription operation results.
Microsoft.Resources/subscriptions/readGets the list of subscriptions.
Microsoft.Resources/subscriptions/resourceGroups/readGets or lists resource groups.
Microsoft.ContainerService/managedClusters/listClusterUserCredential/actionList the clusterUser credential of a managed cluster

Data actions

PermissionWhat it allows
Microsoft.ContainerService/managedClusters/*Every operation under Microsoft.ContainerService/managedClusters

Assign it

Scope it as tightly as you can: a resource or resource group rather than the whole subscription.

azure cli
az role assignment create \
  --assignee "jane.doe@contoso.com" \
  --role "Azure Kubernetes Service RBAC Cluster Admin" \
  --scope "/subscriptions/<subscription id>/resourceGroups/<resource group>"
powershell3 lines
New-AzRoleAssignment -SignInName "jane.doe@contoso.com" `
  -RoleDefinitionName "Azure Kubernetes Service RBAC Cluster Admin" `
  -Scope "/subscriptions/<subscription id>/resourceGroups/<resource group>"
bicep7 lines
resource assignment 'Microsoft.Authorization/roleAssignments@2022-04-01' = {
  name: guid(resourceGroup().id, principalId, 'b1ff04bb-8a4e-4dc4-8eb5-8693973ce19b')
  properties: {
    roleDefinitionId: subscriptionResourceId('Microsoft.Authorization/roleDefinitions', 'b1ff04bb-8a4e-4dc4-8eb5-8693973ce19b')
    principalId: principalId
  }
}

Who already has it?

kql · azure resource graph
authorizationresources
| where type == "microsoft.authorization/roleassignments"
| where tostring(properties.roleDefinitionId) endswith "b1ff04bb-8a4e-4dc4-8eb5-8693973ce19b"
| project principalId = tostring(properties.principalId), principalType = tostring(properties.principalType), scope = tostring(properties.scope)

Other containers roles

Find the smallest role for a task →

Sources