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Thursday, May 23, 2024

Service Principal Permissions for Terraform in Azure DevOps

The service Principal requires more permission on few cases in Azure. But it doesn’t apply to all in this case. as the security model differs for the environment. Below is a scenario that vnet peering is failing on terraform as both the vNETs are managed by the same DevOps Project.

Search for Management Groups which are associated – Add all these service principals to a security group and then Add them to the network contributor role on the specific management group.

2021-04-13T09:31:48.6605992Z Error: creating/updating Virtual Network: (Name "az-mw-pr-uaen-vnet" / Resource Group "az-mw-pr-uaen-net-rg"): network.VirtualNetworksClient#CreateOrUpdate: Failure sending request: StatusCode=0 -- Original Error: Code="NetcfgInvalidSubnet" Message="Subnet 'mw-pr-uaen-waf-snet' is not valid in virtual network 'az-mw-pr-uaen-vnet'." Details=[]
2021-04-13T09:31:48.6610661Z   on ../../../Modules/Azure-VirtualNetwork/1.5/main.tf line 8, in resource "azurerm_virtual_network" "this":
2021-04-13T09:31:48.6611956Z    8: resource "azurerm_virtual_network" "this" {
2021-04-13T09:31:49.0598260Z Releasing state lock. This may take a few moments...

Add Network Contributor level on the management group in my case. in your case, it could be your resource group / virtual network level. whichever suits your environment.

2021-04-14T00:59:14.4934162Z Error: No group found matching specified parameters (display_name: "az-aks-admins")
2021-04-14T00:59:14.4947770Z   on modules/aks_agic/main.tf line 26, in data "azuread_group" "aks_cluster_admins":
2021-04-14T00:59:14.4948806Z   26: data "azuread_group" "aks_cluster_admins" {
2021-04-14T00:59:14.4950117Z listing Groups for filter "displayName eq 'az-aks-cluster-admins'":
2021-04-14T00:59:14.4950920Z graphrbac.GroupsClient#List: Failure responding to request: StatusCode=403 --
2021-04-14T00:59:14.4951499Z Original Error: autorest/azure: Service returned an error. Status=403
2021-04-14T00:59:14.4951962Z Code="Unknown" Message="Unknown service error"
2021-04-14T00:59:14.4952898Z Details=[{"odata.error":{"code":"Authorization_RequestDenied","date":"2021-04-14T00:59:10","message":{"lang":"en","value":"Insufficient
2021-04-14T00:59:14.4953543Z privileges to complete the
2021-04-14T00:59:14.4954191Z operation."},"requestId":"fa522586-9c44-4851-9d85-0f2d7a733d23"}}]

Add the service principles used in – Directory Readers group
Which should allow reading azure ad groups

Satheshwaran Manoharan
Satheshwaran Manoharanhttps://www.azure365pro.com
Award-winning Technology Leader with a wealth of experience running large teams and diversified industry exposure in cloud computing. From shipping lines to rolling stocks.In-depth expertise in driving cloud adoption strategies and modernizing systems to cloud native. Specialized in Microsoft Cloud, DevOps, and Microsoft 365 Stack and conducted numerous successful projects worldwide. Also, Acting as a Technical Advisor for various start-ups.

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