[CRIU] Image cache/proxy TODO

[Radostin Stoyanov]

Hi all,

I would like to work towards merging the remote option and image
cache/proxy into
the master branch of CRIU and I was wondering what needs to be done?

Below is a brief summary of the tasks from [1] and the commit comment in
[2].

1. Add articles for newly introduced actions and options.
- I assume that this task is to add more information to the following pages
* https://criu.org/CLI/opt/--remote
* https://criu.org/CLI/cmd/image-cache
* https://criu.org/CLI/cmd/image-proxy

2. Make the UNIX sockets reside in work-dir.
- The option -D|--images-dir should become optional. When --remote is used,
CRIU should work purely on the work-dir and not generate anything in the
images-dir.

3. Tune up the image_cache and image_proxy commands to accept the
--status-fd
and --pidfile options.

4. Fix local connections not to generate per-image threads.
- I believe that this one is already done.

5. No strings in protocol. Now the hard-coded "RESTORE_FINISH" string
(and DUMP_FINISHED one) is used to terminate the communication.
Need to tune up the protobuf objects to send boolean (or integer) EOF
sign rather that the string.

6. Check how proxy/cache works with incremental dumps.

7. Add support for cache/proxy into go-phaul code.

Is there anything else?

[1] https://criu.org/Image_cache/proxy_TODO
[2]
https://github.com/checkpoint-restore/criu/commit/a14f0d0effc92985a79a9a9da86e338b968c26d6

Thanks,
Radostin