Storage REST API Returns Remote Name Could Not be Resolve Often - azure

Question

I am calling the storage REST API to get container names using
Invoke-WebRequest -Method GET -Uri $storage_url -Headers $headers
This command often returns 'remote name could not be resolved error', even when the storage account exists and is reachable. Just running the command again gives correct result.
Invoke-WebRequest : The remote name could not be resolved: '<storageAccountName>.blob.core.windows.net'
At line:1 char:1
+ Invoke-WebRequest -Method GET -Uri $storage_url -Headers $headers #In ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-WebRequest], WebException
+ FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeWebRequestCommand

Answer 1

From the information you provided, you use the client credential flow to get the access token, then use the token to call the Storage Rest API - List Containers.
You could use the script below, it works for me.
Make sure the service principal you used has a RBAC role e.g. Contributor/Owner in your storage account -> Access Control, if not, click the Add to add it.
$ClientID = "xxxxxxx"
$ClientSecret = "xxxxxxx"
$tennantid = "xxxxxxx"
$storageaccountname = "joystoragev2"
$TokenEndpoint = {https://login.microsoftonline.com/{0}/oauth2/token} -f $tennantid
$Resource = "https://storage.azure.com/"
$Body = #{
'resource'= $Resource
'client_id' = $ClientID
'grant_type' = 'client_credentials'
'client_secret' = $ClientSecret
}
$params = #{
ContentType = 'application/x-www-form-urlencoded'
Headers = #{'accept'='application/json'}
Body = $Body
Method = 'Post'
URI = $TokenEndpoint
}
$token = Invoke-RestMethod #params
$accesstoken = $token.access_token
$url = {https://{0}.blob.core.windows.net/?comp=list} -f $storageaccountname
$header = #{
'Authorization' = 'Bearer ' + $accesstoken
'x-ms-version' = '2019-02-02'
}
$response = Invoke-WebRequest –Uri $url –Headers $header –Method GET
$response.RawContent