Question

You are configuring the final elements of a migration effort where resources have been moved from on-premises to Google Cloud. While reviewing the deployed architecture, you noticed that DNS resolution is failing when queries are being sent to the on-premises environment. You log in to a Compute Engine instance, try to resolve an on-premises hostname, and the query fails. DNS queries are not arriving at the on-premises DNS server. You need to use managed services to reconfigure Cloud DNS to resolve the DNS error. What should you do?

Accepted Answer

Validate that the Compute Engine instances are using the Metadata Service IP address as their resolver. Configure an outbound forwarding zone for the on-premises domain pointing to the on- premises DNS server. Configure Cloud Router to advertise the Cloud DNS proxy range to the on- premises network.

Answer

Validate that there is network connectivity to the on-premises environment and that the Compute Engine instances can reach other on-premises resources. If errors persist, remove the VPC Network Peerings and recreate the peerings after validating the routes.

Answer

Review the existing Cloud DNS zones, and validate that there is a route in the VPC directing traffic destined to the IP address of the DNS servers. Recreate the existing DNS forwarding zones to forward all queries to the on-premises DNS servers.

Answer

Ensure that the operating systems of the Compute Engine instances are configured to send DNS queries to the on-premises DNS servers directly.

You are configuring the final elements of a migration effort where resources have been moved from on-premises to Google Cloud. While reviewing the…

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