Porting Docker to FreeBSD

Transcript

1. Porting
   Docker to
   FreeBSD
   Kato Kazuyoshi
   http://8-p.info/
   

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2. YO DAWG, I HERD YOU LIKE DOCKER
   SO I PUT DOCKER ON VIRTUALBOX SO
   YOU CAN RUN DOCKER ON YOUR MAC
   

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3. Docker
   Init
   Docker
   Init
   Docker
   Init
   Docker
   daemon
   Docker
   client
   Docker
   client
   HTTP
   Unix
   domain socket
   exec
   

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4. execdriver
   networkdriver
   graphdriver
   lxc native
   aufs devmapper btrfs vfs
   bridge
   chroot
   Jan 11th-Feb 25th
   

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5. cgroups
   Linux 2.6.24 (2007)
   Solaris Zones
   Solaris 10 (2005)
   FreeBSD jail
   FreeBSD 4.0 (2000) by phk@
   

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6. https://github.com/kzys/docker/tree/execdriver-jail
   

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7. % git log --oneline --author kazu master
   7337114 cp's -T and --reflink=auto are only available on GNU coreutils
   0046995 Fatal() doesn't take a format string like Fatalf()
   21b42df UTIME_OMIT is only available on Linux
   92ea101 SQLite is also available in FreeBSD
   e1e512e This permission should be interpreted as octal, not decimal
   3754fdd Support FreeBSD on pkg/mount
   ca7a0e6 FreeBSD's nullfs doesn't support file mount
   a7e181c Add a test for mount.GetMounts
   0f72486 Fix utils.FollowSymlinkInScope's infinite loop bug
   e3e078c Add the test to reproduce the issue even in "make test"
   c5226d9 Avoid "invalid memory address or nil pointer dereference" panic
   1c90a4d Support FreeBSD on pkg/system/utimes_*.go
   66baf56 Unlike GNU find, FreeBSD's find needs a path before an expression
   18bea24 Use LLVM Clang explicitly on FreeBSD
   794b5de Don't assume the file system has sub-second precision timestamp
   da8aa71 Remove archive/stat_unsupported.go because it is not used
   b2cd890 Like signal_linux.go, we don't have import os and os/signal
   %
   

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8. IMHO
   "return err" is sometimes
   hard to debug because
   there is no context like
   a stack trace
   ... by default. Maybe what I need is github.com/juju/errgo.
   

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9. TODO
   Upstream "jail" execdriver
   (Use jail(2) instead of /usr/sbin/jail, ...)
   Start implementing a graphdriver for ZFS
   Start implementing a networkdriver
   

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