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Azure Kubernetes Service- Failed to acquire a token

When invoking ‘kubectl’, it failed with the following error message:

PS /home/bart> kubectl apply -f ./example.yaml

E0720 07:58:14.668222     182 azure.go:154] Failed to acquire a token: unexpected error when refreshing token: refreshing token: adal: Refresh request failed. Status Code = '400'. Response body: {"error":"invalid_grant","error_description":"AADSTS700082: The refresh token has expired due to inactivity. The token was issued on 2021-03-31T13:22:18.9100852Z and was inactive for 90.00:00:00.\r\nTrace ID: 68f8e37d-4d18-4e7d-a3e6-b11291831a02\r\nCorrelation ID: 65ee9420-d6f9-4a7c-8214-a82756c7ecc8\r\nTimestamp: 2021-07-20 07:58:14Z","error_codes":[700082],"timestamp":"2021-07-20 07:58:14Z","trace_id":"68f8e37d-4d18-4e7d-a3e6-b11291831a02","correlation_id":"65ee9420-d6f9-4a7c-8214-a82756c7ecc8","error_uri":"https://login.microsoftonline.com/error?code=700082"}

The error is self explaining. My refresh token has expired and as a consequence it was not possible to get a new access token.

But how can we fix this?

We need to re-invoke the az aks get-credentials command. You’ll have to authenticate again after which the credentials will be downloaded and available in the Kubernetes CLI.

az aks get-credentials --resource-group myResourceGroup --name myAKSCluster

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