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An attempt at a Ruby version of Liz Rice's containers-from-scratch project

C 25.60% Ruby 68.41% Shell 5.99%

cgroups child-process clone container fork-bomb isolation linux namespace ruby sandbox syscall ubuntu unshare

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containers-from-scratch's Issues

warning: pthread_create failed for timer: Invalid argument, scheduling broken

I think the following warning started to occur when I added the CLONE_NEWPID flag to the call to unshare. It doesn't seem to cause a problem at the moment, but it may well be a hidden danger.

root@ubuntu-xenial:/vagrant# ./container run /bin/bash
run: Running ["/bin/bash"]
child: Running ["/bin/bash"]
/var/lib/gems/2.4.0/gems/childprocess-0.8.0/lib/childprocess/unix/fork_exec_process.rb:20: warning: pthread_create failed for timer: Invalid argument, scheduling broken
root@container:/#

A workshop on Linux containers: Rebuild Docker from Scratch

This Python implementation might be of interest: A workshop on Linux containers: Rebuild Docker from Scratch.

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