Unable to connect Azure Container Registry from Azure DevOps build pipeline

Question

I have one ACR, I am trying to connect the ACR from DevOps build pipeline but its showing below error.

'GetUserAccessToken: Failed to obtain an access token of identity xxxx-xxxx-xxxx-xxxx-xxxxxxx. AAD returned silent failure.'

I tried to logout, re-login and cache, in incognito mode as well but its not helping me. Can you suggest me what to do here?

Answer 1

few steps you can take to troubleshoot and resolve the problem:

Verify ACR authentication configuration: Double-check the authentication configuration for your Azure Container Registry (ACR). Make sure that the ACR is configured to allow access from Azure DevOps and the specific identity you are using in the build pipeline. You can review the authentication settings in the ACR's access control configuration.

Check AAD permissions: Ensure that the identity you are using in the build pipeline has the necessary permissions in Azure Active Directory (AAD) to access the ACR. Verify that the identity is a member of the appropriate AAD group or has been granted the required roles or permissions to authenticate and access the ACR.

Validate service principal configuration: If you are using a service principal in your build pipeline to authenticate with the ACR, confirm that the service principal is properly configured and has the necessary permissions. Ensure that the client ID, client secret, or certificate used by the service principal is correct and hasn't expired.

Check ACR firewall and networking settings: Review the firewall and virtual network settings for your ACR. Make sure that the IP address or range associated with the build pipeline's agent is allowed to access the ACR. If the build pipeline is running within a virtual network or a private subnet, ensure that the necessary network connectivity and routing are properly configured.

Validate Azure DevOps service connection: Double-check the Azure DevOps service connection configuration for connecting to the ACR. Ensure that the service connection is correctly configured with the appropriate ACR details, authentication method (e.g., service principal, managed identity), and access permissions.

Troubleshoot Azure AD authentication: If you're using Azure AD authentication to access the ACR, you can try the following steps to troubleshoot:

a. Verify that the Azure AD tenant associated with the ACR is correct and properly configured.

b. Check if there are any conditional access policies or security restrictions in place that might be blocking the authentication process.

c. Ensure that the required AAD app registration or enterprise application is properly configured and has the necessary permissions.

Contact Azure support: If you have gone through the above steps and the issue persists, it may be necessary to contact Azure support for further assistance. They can help investigate the specific details of your ACR, Azure AD configuration, and build pipeline setup to identify and resolve the issue.

By following these steps, you should be able to diagnose and resolve the issue preventing your Azure DevOps build pipeline from connecting to the Azure Container Registry.