Google Cloud VM Image to docker image

Question

I have a Google Cloud VM that installed with my application. The installation step is completed and I:

1. Turned off the VM instance.
2. Exported the disk to disk image called MY_CUSTOM_IMAGE_1

My wish now is to use MY_CUSTOM_IMAGE_1 as the starting image of my docker image build. For building the images I'm using Google Cloud Build.

My docker file should look like this:

Answer 1

If you know all the installed things on your VM (and all the commands)  do the same thing in a Docker file. Use as base image. the same OS version as your current VM. Perform some tests and it should be quickly equivalent.

If you have statefull files in your VM application, its a little bit more complex. You have to mount a disk in your container and to update your application's configuration to write in the correct mounted folder. You will find examples on the internet.