create docs on creating image of gcp image to download/debug locally

[eyberg]

[fabioDMFerreira]

1. Go to the image page;
2. Click export to copy image to google storage (select qcow2 format)
3. Download exported file from bucket
4. Convert downloaded file from qcow2 to raw using qemu-img convert -O raw -f qcow2 image.qcow2 image.img
5. Run dump tool on raw file using ~/.ops/<ops_version>/dump -l <path_to_downloaded_file>

[fabioDMFerreira]

If we want to download a disk we have to create an image from the disk before following the steps above.

[eyberg]

this tkt is to document how to export a running/stopped vm - not the disk image that was uploaded (eg: after it's been running, possibly writing data, possibly crashing for a while)

[fabioDMFerreira]

Got it.

We can still leverage the checklist above. A disk is automatically created when an instance is launched. So, we have to export the instance disk to debug.