Google Compute Engine - Can't connect via SSH? VM loses network access?

Solution 1:

There may be a number of reasons for this to happen. I would recommend checking the SSH troubleshooting document for more information about how to troubleshoot this issue.

This issue could also occur if the Linux guest environment did not initiate properly after the live migration. The guest environments includes a set of scripts and processes that run contents from a metadata server and creates the proper environment for a virtual machine to run. It might be possible that the SSH keys were not set properly during the guest environment setup.

You may also set the 'automaticRestart' field to 'true' as mentioned in this document. This will automatically restart your instance if it crashes due to a hardware issue or after a live migration. This will ensure that the SSH keys were set up correctly. Feel free to read the live migration documentation if you need further information about live migration in Google Cloud Platform.