QEMU tutorial debugging#

You may wish to test out the commands in this tutorial as a script to check for copy-paste mistakes.

If you successfully launched the virtual machine, but couldn’t log in, there are a few places to check to debug your setup.

To debug, answer the following questions:

Did cloud-init discover the IMDS webserver?#

The webserver should print a message in the terminal for each request it receives. If it didn’t print out any messages when the virtual machine booted, then cloud-init was unable to obtain the config. Make sure that the webserver can be locally accessed using curl or wget.

$ curl
$ curl
$ curl

Did the IMDS webserver serve the expected files?#

If the webserver prints out 404 errors when launching QEMU, then check that you started the server in the temp directory.

Were the configurations inside the file correct?#

When launching QEMU, if the webserver shows that it succeeded in serving user-data, meta-data and vendor-data, but you cannot log in, then you may have provided incorrect cloud-config files. If you can mount a copy of the virtual machine’s filesystem locally to inspect the logs, it should be possible to get clues about what went wrong.