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edits
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crtools -> criu
=== Run (isolated) ===
=== Run (isolated) ===
Now, if you try to simply run and try to dump such a program, crtools will fail. The reason is a program you launch from the shell shares some common resources with the shell, notably its session and terminal. Crtools has a built-in check that makes sure there are no such resources.
Now, if you try to simply run and try to dump such a program, criu will fail. The reason is a program you launch from the shell shares some common resources with the shell, notably its session and terminal. Criu has a built-in check that makes sure there are no such resources.
To remove the dependency on a current terminal, let's executed our script in a new session and redirect its output to a file:
To remove the dependency on a current terminal, let's executed our script in a new session and redirect its output to a file:
Dump it:
Dump it:
# crtools dump -t 2221 -vvv -o dump.log && echo OK
# criu dump -t 2221 -vvv -o dump.log && echo OK
OK
OK
Restore the test process:
Restore the test process:
# crtools restore -d -t 2221 -vvv -o restore.log && echo OK
# criu restore -d -t 2221 -vvv -o restore.log && echo OK
OK
OK
For that we need to execute our test script or another program (e.g. "top") from a terminal without any redirection.
For that we need to execute our test script or another program (e.g. "top") from a terminal without any redirection.
Note crtools only supports [http://en.wikipedia.org/wiki/Pseudo_terminal Unix98 PTYs].
Note criu only supports [http://en.wikipedia.org/wiki/Pseudo_terminal Unix98 PTYs].
=== Run ===
=== Run ===
=== Dump ===
=== Dump ===
Currently crtools doesn't support a stopped task, so "crtools dump" must be executed from another terminal.
Currently criu doesn't support a stopped task, so "criu dump" must be executed from another terminal.
# crtools dump -t 2621
# criu dump -t 2621
(00.012929) Error (tty.c:1022): tty: Found dangling tty with sid 940 pgid 2621 (pts) on peer fd 0. Consider using --shell-job option.
(00.012929) Error (tty.c:1022): tty: Found dangling tty with sid 940 pgid 2621 (pts) on peer fd 0. Consider using --shell-job option.
(00.013111) Error (cr-dump.c:1636): Dumping FAILED.
(00.013111) Error (cr-dump.c:1636): Dumping FAILED.
See, crtools asks to set the <code>--shell-job</code>, because we try to dump only a part of a session and a slave end of a tty pair. It is a common rule to ask a user, if only a part of something is dumped.
See, criu asks to set the <code>--shell-job</code>, because we try to dump only a part of a session and a slave end of a tty pair. It is a common rule to ask a user, if only a part of something is dumped.
# crtools dump -vvvv -o dump.log -t 2621 --shell-job && echo OK
# criu dump -vvvv -o dump.log -t 2621 --shell-job && echo OK
OK
OK
=== Restore ===
=== Restore ===
# criu restore -vvvv -o restore.log -t 2621 --shell-job
Fri Apr 12 12:41:09 MSK 2013
Fri Apr 12 12:41:09 MSK 2013
Fri Apr 12 12:41:10 MSK 2013
Fri Apr 12 12:41:10 MSK 2013
[[Category:HOWTO]]
[[Category:HOWTO]]