mruby-criu

CRIU, Checkpoint Restart In Userspace for Linux, binding for mruby.

install by mrbgems

• add conf.gem line to build_config.rb

MRuby::Build.new do |conf|

    # ... (snip) ...

    conf.gem :git => 'https://github.com/matsumoto-r/mruby-criu.git'
end

Dump and Restore Process

Isolated process run

loop.sh

#!/bin/bash
cont=0
while :; do
  sleep 1
  cont=`expr $cont + 1`
  echo $cont
done

run

setsid ./loop.sh < /dev/null &> loop_log.txt  &

get pid

ps -C loop.sh
  PID TTY          TIME CMD
 4823 ?        00:00:00 loop.sh
[1]+  Done                    setsid ./loop.sh < /dev/null &>loop_log.txt

check log

tail -f loop_log.txt
1
2
3
...

Dump(Checkpoint)

socket = "/var/run/criu_service.socket"
images = "/tmp/dump_test"
log = "dump.log"
pid = 4823

c = CRIU.new
c.set_pid pid
c.set_images_dir images
c.set_service_address socket
c.set_log_file log

c.dump

dump loop.sh

./bin/mruby dump.rb

then, loop.sh was killed.

tail -f loop_log.txt
1
2
3

(stopped)

Restore

socket = "/var/run/criu_service.socket"
images = "/tmp/dump_test"
log = "restore.log"

c = CRIU.new
c.set_service_address socket
c.set_images_dir images
c.set_log_file log

c.restore

restore loop.sh

./bin/mruby restore.rb

then, loop.sh was restored

tail -f loop_log.txt
(restored)
4
5
6
...

License

under the MIT License:

• see LICENSE file