Azure Service Principal in Jenkins


A quick update to a previous post - below is how to add an Azure Service Principal to a Jenkins job - then use it to authenticate to Azure using PowerShell Core.

  1. Ensure that the Azure AD Plugin is installed in the Jenkins instance - it requires a restart of the service.
  2. Add a new credential - select Microsoft Azure Service Principal
  3. Fill in the details from your application. 
  4. Click Verify Service Principal. If it is working you should get a success message.

When using the service principal in a job.

    1. Ensure that the Use secret text or file(s) is ticked and select the service principal. 
    2. In the ps1 file - add the following function (or create a module on the Jenkins node) - the you can just call it to authenticate to Azure.


function Connect-AzureJenkins {
$tenantId = $env:AZURE_TENANT_ID
$username = $env:AZURE_CLIENT_ID
$password = ConvertTo-SecureString -String $env:AZURE_CLIENT_SECRET -AsPlainText -Force
$credential = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $username, $password
Add-AzureRmAccount -ServicePrincipal -Credential $credential -TenantId $tenantId
}

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