Back => [DockerService, QemuService] : Save running containers name/config on shutdown

[Azkali]

Issue description

On shutdown, the application should save a reference of the running Docker containers and Qemu/Virtualbox VM's.

Possible resolution

Create a snapshot file of the latest configuration ?

[GerkinDev]

Maintaining a json file containing all applications currently running can actually be a good idea to restore a session. But do users really need to restart applications they are not running on start ?

[Azkali]

We may add a choice box so users could choose to restore previous session or start a new one :

$ npm run start

,------.               ,--.                        ,--.   ,--. 
|  .-.  \  ,---.  ,---.|  |,-. ,---. ,--.--. ,---. `--' ,-|  | 
|  |  \  :| .-. || .--'|     /| .-. :|  .--'| .-. |,--.' .-. | 
|  '--'  /' '-' '\ `--.|  \  \\   --.|  |   ' '-' '|  |\ `-' | 
`-------'  `---'  `---'`--'`--'`----'`--'    `---' `--' `---' 

info: Found previous session configuration ! :
info: { Config }
info: Found a configuration for a previous session. Do you want to use that session ? [Y/n]

[GerkinDev]

The problem with that is that if the API is daemonized & autostarted via systemctl (or other services manager), it won't be able to catch any stdin. Supporting it for interactive prompt is OK, but we should cover following cases:

• With stdin available (the default case), it should use the prompt you suggested (see #footnote)
• If some flags are provided (for example -c|--config config-file.json), it should read those values & disable stdin completely.
• And finally, the user should be able to use other flags to override config file or avoid prompts from stdin.

But: what to do if the user start the app in non interactive mode & no config file is provided ? Should we throw & exit ?

TODO: describe config interface, & representation in json or app arguments. Plz make issue & proposal. Separate config+stdin options & web interface settings if required (see #5).

Footnote

Very nice prompt example. Does it result of an actual implementation or you just created it ?