Support for azurerm_managed_identity_federated_identity_credential

[timja]

Is there an existing issue for this?

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Description

Add support for creating federated identity credentials for managed identity

New or Affected Resource(s)/Data Source(s)

azurerm_managed_identity_federated_identity_credential

Potential Terraform Configuration

I assume basically the same as https://registry.terraform.io/providers/hashicorp/azuread/latest/docs/resources/application_federated_identity_credential

resource "azurerm_managed_identity_federated_identity_credential" "this" {
  managed_identity_object_id = "..."
  issuer = ""
  subject = ""
  name = ""
  audience = ""
}

References

I would like to use this with AKS, (docs for this feature are in this PR: Azure/azure-workload-identity#577)

More info at https://learn.microsoft.com/en-us/azure/aks/workload-identity-overview as well

[piroinno]

For those interested I got this working using the azAPI

resource "azapi_resource" "federated_identity_credential" {
  schema_validation_enabled = false
  name                      = var.federated_user_identity
  parent_id                 = data.azurerm_user_assigned_identity.my_user_managed_identity.id
  type                      = "Microsoft.ManagedIdentity/userAssignedIdentities/federatedIdentityCredentials@2022-01-31-preview"

  location = var.location
  body = jsonencode({
    properties = {
      issuer    = azurerm_kubernetes_cluster.mycluster.oidc_issuer_url
      subject   = format("system:serviceaccount:%s:%s", var.namespace, var.aks_service_account)
      audiences = ["api://AzureADTokenExchange"]
    }
  })
  lifecycle {
    ignore_changes = [location]
  }
}

[jkroepke]

For those interested I got this working using the azAPI

This resources in a loop results into concurrency errors:

│ Error: creating/updating "Resource: (ResourceId \"/subscriptions/xxx/resourceGroups/default/providers/Microsoft.ManagedIdentity/userAssignedIdentities/github-actions/federatedIdentityCredentials/repo-jkroepke-homelab-environment-aks\" / Api Version \"2022-01-31-preview\")": PUT https://management.azure.com/subscriptions/xxx/resourceGroups/default/providers/Microsoft.ManagedIdentity/userAssignedIdentities/github-actions/federatedIdentityCredentials/repo-jkroepke-homelab-environment-aks
│ --------------------------------------------------------------------------------
│ RESPONSE 409: 409 Conflict
│ ERROR CODE: ConcurrentFederatedIdentityCredentialsWritesForSingleManagedIdentity
│ --------------------------------------------------------------------------------
│ {
│   "error": {
│     "code": "ConcurrentFederatedIdentityCredentialsWritesForSingleManagedIdentity",
│     "message": "Too many Federated Identity Credentials are written concurrently for the managed identity '/subscriptions/xxx/resourcegroups/default/providers/microsoft.managedidentity/userassignedidentities/github-actions'. Concurrent Federated Identity Credentials writes under the same managed identity are not supported."
│   }
│ }
│ --------------------------------------------------------------------------------
│ 
│ 
│   with module.mi-github-actions.azapi_resource.federated_identity_credential["repo:jkroepke/homelab:environment:aks"],
│   on modules/federated-managed-identity/main.tf line 8, in resource "azapi_resource" "federated_identity_credential":
│    8: resource "azapi_resource" "federated_identity_credential" {
│ 
╵

This should be remembered, it a terraform resources has been created.

[github-actions]

This functionality has been released in v3.31.0 of the Terraform Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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