5 ms·

FreeBSD Port of Docker

125 points by QUFB 11y ago

AdrianRossouw 11y ago
interesting. how does it handle running linux containers? or does this work the same way as boot2docker?
- papercrane 11y ago
  Looks when it detects a linux container it uses FreeBSD's linux compatibility layer. https://github.com/kvasdopil/docker/commit/da50a79947f46ab64d156d6a5ece3616da3ac480?diff=split https://github.com/kvasdopil/docker/commit/da50a79947f46ab64...
  - justincormack 11y ago
    Note that 64 bit Linux compat is not in the current release of FreeBSD but should be available in the next release.
zwischenzug 11y ago
Would it be better to target 'RunC', as the open container standard?
- codemac 11y ago
  They'd probably need to do both, as users who want to use docker depend on very specific parts of the docker ecosystem (docker hub, the docker daemon itself, etc). Not to mention this is essentially just packaging, I hope they package any software they find reasonably popular and let users decide what's more important to them.
  - ewindisch 11y ago
    The link sends you to the packaging, but this is a bonafide port which uses FreeBSD jails. The code is not yet upstream in Docker, but I imagine (hope) we'll see this work come in as pull-requests. (Disclosure: I am an employee of Docker, Inc. Any opinions expressed here are my own)
zbyte64 11y ago
Does this bring us closer to having native docker support on OSX?
- MikeKusold 11y ago
  Unlikely. It appears that this is dependent on BSD's jails. https://github.com/kvasdopil/docker/blob/freebsd-compat/FREEBSD-PORTING.md https://github.com/kvasdopil/docker/blob/freebsd-compat/FREE...
- isomorphic 11y ago
  This is off-topic and not the same thing, but you should look into xhyve: https://github.com/mist64/xhyve https://github.com/mist64/xhyve ...and then: https://github.com/coreos/coreos-xhyve https://github.com/coreos/coreos-xhyve https://github.com/ailispaw/boot2docker-xhyve https://github.com/ailispaw/boot2docker-xhyve Previous discussion here: https://news.ycombinator.com/item?id=9690846 https://news.ycombinator.com/item?id=9690846
- TickleSteve 11y ago
  No, Its a popular misconception that OSX is based on BSD... its not. OSX is a MACH kernel with a BSD userland (read BSD compatibility layer) much the same as there exists a POSIX layer for Windows.
  - danieldk 11y ago
    BSD runs in kernel-space as well to provide the typical UNIX functionality (BSD system calls, UNIX-style processes, etc). You can see this in the kernel sources for XNU, which contains a fairly sizable chunk of a BSD kernel: https://github.com/opensource-apple/xnu/tree/10.10/bsd https://github.com/opensource-apple/xnu/tree/10.10/bsd There were other projects that used comparable approaches, such as Lites: http://www.cs.utah.edu/flux/lites/html/ http://www.cs.utah.edu/flux/lites/html/ No, Its a popular misconception that OSX is based on BSD... its not. So no, this is not a misconception, it's actually true. Sure, there is BSD in userland as well, but the kernel is Mach and BSD.
  - bstx 11y ago
vezzy-fnord 11y ago
See also Jetpack, a native FreeBSD implementation of the appc spec (to be converted to OCP, I presume): https://github.com/3ofcoins/jetpack https://github.com/3ofcoins/jetpack
jfb 11y ago
Now I just need nvcc to ditch linux entirely. Sadly, that's not going to be forthcoming in this or any other universe.
- justincormack 11y ago
  Will it work under emulation (you need freebsd current not 10.1 to get 64 bit Linux emulation)?
feld 11y ago
I'm not sure what it will gain me over my home-grown scripts to manage jails the way I like them, but I'll certainly play with it when it's ready for consumption.
- batou 11y ago
  I'm finding that good old fashioned processes are a pretty good and long forgotten virtualization system! Not only that you can manage them very easily with stable tools like ansible and deploy them as packages (rpms). Our native IO and bare metal HP DL380s go crazy fast with hundreds of processes running.
  - feld 11y ago
    How vintage of you!
- kjs3 11y ago
  Care to share? Always looking for jails management tips.
patkai 11y ago
ZFS <3
- TheDong 11y ago
  Docker has zfs support for zfs on linux already.

125 points by QUFB 11y ago

AdrianRossouw 11y ago

interesting. how does it handle running linux containers? or does this work the same way as boot2docker?

papercrane 11y ago
Looks when it detects a linux container it uses FreeBSD's linux compatibility layer. https://github.com/kvasdopil/docker/commit/da50a79947f46ab64d156d6a5ece3616da3ac480?diff=split https://github.com/kvasdopil/docker/commit/da50a79947f46ab64...
- justincormack 11y ago
  Note that 64 bit Linux compat is not in the current release of FreeBSD but should be available in the next release.

zwischenzug 11y ago

Would it be better to target 'RunC', as the open container standard?

codemac 11y ago
They'd probably need to do both, as users who want to use docker depend on very specific parts of the docker ecosystem (docker hub, the docker daemon itself, etc). Not to mention this is essentially just packaging, I hope they package any software they find reasonably popular and let users decide what's more important to them.
- ewindisch 11y ago
  The link sends you to the packaging, but this is a bonafide port which uses FreeBSD jails. The code is not yet upstream in Docker, but I imagine (hope) we'll see this work come in as pull-requests. (Disclosure: I am an employee of Docker, Inc. Any opinions expressed here are my own)

zbyte64 11y ago

Does this bring us closer to having native docker support on OSX?

MikeKusold 11y ago
Unlikely. It appears that this is dependent on BSD's jails. https://github.com/kvasdopil/docker/blob/freebsd-compat/FREEBSD-PORTING.md https://github.com/kvasdopil/docker/blob/freebsd-compat/FREE...
isomorphic 11y ago
This is off-topic and not the same thing, but you should look into xhyve: https://github.com/mist64/xhyve https://github.com/mist64/xhyve ...and then: https://github.com/coreos/coreos-xhyve https://github.com/coreos/coreos-xhyve https://github.com/ailispaw/boot2docker-xhyve https://github.com/ailispaw/boot2docker-xhyve Previous discussion here: https://news.ycombinator.com/item?id=9690846 https://news.ycombinator.com/item?id=9690846
TickleSteve 11y ago
No, Its a popular misconception that OSX is based on BSD... its not. OSX is a MACH kernel with a BSD userland (read BSD compatibility layer) much the same as there exists a POSIX layer for Windows.
- danieldk 11y ago
  BSD runs in kernel-space as well to provide the typical UNIX functionality (BSD system calls, UNIX-style processes, etc). You can see this in the kernel sources for XNU, which contains a fairly sizable chunk of a BSD kernel: https://github.com/opensource-apple/xnu/tree/10.10/bsd https://github.com/opensource-apple/xnu/tree/10.10/bsd There were other projects that used comparable approaches, such as Lites: http://www.cs.utah.edu/flux/lites/html/ http://www.cs.utah.edu/flux/lites/html/ No, Its a popular misconception that OSX is based on BSD... its not. So no, this is not a misconception, it's actually true. Sure, there is BSD in userland as well, but the kernel is Mach and BSD.
- bstx 11y ago

vezzy-fnord 11y ago

See also Jetpack, a native FreeBSD implementation of the appc spec (to be converted to OCP, I presume): https://github.com/3ofcoins/jetpack https://github.com/3ofcoins/jetpack

jfb 11y ago

Now I just need nvcc to ditch linux entirely. Sadly, that's not going to be forthcoming in this or any other universe.

justincormack 11y ago
Will it work under emulation (you need freebsd current not 10.1 to get 64 bit Linux emulation)?

feld 11y ago

I'm not sure what it will gain me over my home-grown scripts to manage jails the way I like them, but I'll certainly play with it when it's ready for consumption.

batou 11y ago
I'm finding that good old fashioned processes are a pretty good and long forgotten virtualization system! Not only that you can manage them very easily with stable tools like ansible and deploy them as packages (rpms). Our native IO and bare metal HP DL380s go crazy fast with hundreds of processes running.
- feld 11y ago
  How vintage of you!
kjs3 11y ago
Care to share? Always looking for jails management tips.

patkai 11y ago

ZFS <3

TheDong 11y ago
Docker has zfs support for zfs on linux already.