rasmusgude

# authentication using service principal (appid+secret)
$tenantid = '<tenant-id>';
$appid = '<app-id>';
$secret = ConvertTo-SecureString '<app-secret>' -AsPlainText -Force;
$cred =  New-Object System.Management.Automation.PSCredential ($appid, $secret);
Login-AzAccount -ServicePrincipal -TenantId $tenantid -Credential $cred

# if login does not succeed with service principal then prompt for login
if ([string]::IsNullOrEmpty($(Get-AzureRmContext).Account)) {Login-AzureRmAccount}

rasmusgude

# Function for easily querying the Azure Instance Metadata Service

Function AzMeta {
    Param( [Parameter(ValueFromPipeline)] $p ) 
    
    Invoke-RestMethod `
        -Headers @{"Metadata"="true"} `
        -URI "http://169.254.169.254/metadata/instance/$($p)?api-version=2017-08-01&format=text"
}

rasmusgude

# “One-liner” for easily querying the Azure Instance Metadata Service.

"network/interface/0/ipv4/ipAddress/0/publicIpAddress" | Tee-Object -Variable p | Out-Null ; Invoke-RestMethod -Headers @{"Metadata"="true"} -URI "http://169.254.169.254/metadata/instance/$($p)?api-version=2017-08-01&format=text"

# Instead of "network/interface/0/ipv4/ipAddress/0/publicIpAddress" you can use any 
# path throgh the instance metadata json structure.
# You can find a sample json structure here:
# {
#     "compute": {
#         "location": "westus2",