Is there any Official roadmap for docker 32 bit containers on 32-bit H/W? Please suggest

[newtonkishore]

No description provided.

[remram44]

Duplicates #611?

[jokeyrhyme]

@remram44 not quite an exact duplicate. #611 is about running 32-bit containers on a 64-bit host. I can't read @newtonkishore's mind, but maybe this ticket is just about 32-bit in general, or 32-bit on 32-bit?

[newtonkishore]

@jokeyrhyme Thanks for the comment. I have 32-bit hardware architecture, is it possible to run dockers on that, last i heard docker is supported only on 64 bit arch. Any help would be appreciated. Thanks in advance.

[Kentoseth]

Apparently this guy has got a 32-bit version of Docker (meaning that it will run on the 32-bit architecture and H/W):

https://github.com/rcsavage/Docker-1.2.0-i686

I think he made it run on Fedora, but tests for Ubuntu/CentOS would be welcomed.

[dashohoxha]

I have been able to build 32bit images on Ubuntu 14.04 32bit:

• https://github.com/docker-32bit
• https://registry.hub.docker.com/repos/32bit/
• Call for help docker-32bit/ubuntu-upstart#1

Until Docker has official support for 32bit images, I would suggest that we form a community for building and maintaining them, so that we could help each-other.

[Kentoseth]

@dashohoxha -

So we need the updated version of Ubuntu to use the newer kernel, etc. so that Docker can run on it ? Last I saw, Docker didn't support the older kernels.

👍 To the idea of creating an informal 32-bit Docker community.

[dashohoxha]

I have Xubuntu 14.04, non-PAE, and my kernel (from uname -r) is 3.13.0-37-generic. I don't know whether you have something older than this. My output for docker version is

Client version: 1.0.1
Client API version: 1.12
Go version (client): go1.2.1
Git commit (client): 990021a
Server version: 1.0.1
Server API version: 1.12
Go version (server): go1.2.1
Git commit (server): 990021a

I have tried many things, but I think that I just installed it with apt-get install docker.io, without compilation etc.

[dashohoxha]

This one was useful too:
http://www.tekhead.org/blog/2014/09/installing-docker-on-ubuntu-quick-fix/

[SvenDowideit]

Hey guys,

you could form a discussion group on https://forums.docker.com to keep the info up to date :)

[dashohoxha]

I think that GitHub is the best place for discussion too (not only for coding).
Anyway, I have started a topic here: https://forums.docker.com/t/docker-32bit-images/349?u=dashohoxha

[Kentoseth]

It's not like 32-bit containers are first-class citizens in Docker in any case. So discussion here and in our repo/group should suffice.

If the Docker team does decide to recognize 32-bit containers, then we can probably move the discussion to where it is visible to the team (their forum).

[anil18]

hi dashohoxha,
i try to install the docker on 32 bit ubuntu 12.04 but i got a error like
$ sudo apt-get -y install git linux-image-extra-$(uname -r) lxc xz-utils
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package linux-image-extra-3.8.0-29-generic
E: Couldn't find any package by regex 'linux-image-extra-3.8.0-29-generic'

please help me how to install docker in 32 bit ubuntu 12.04. with little more explanation.

[Kentoseth]

Hi @anil18

Can you open (copy/paste) the issue here:

https://github.com/docker-32bit/ubuntu

I think I have a rough idea why it isn't installing on 32-bit 12.04

[dashohoxha]

@anil18
The messages above have all that I know about installing docker in 32bit ubuntu.
I am repeating them:

1. apt-get install docker.io
2. Look at: http://www.tekhead.org/blog/2014/09/installing-docker-on-ubuntu-quick-fix/

Maybe @Kentoseth can give you more help.

By the way, I have stopped using docker on 32bit ubuntu (because I find docker not very suitable while you are developing). I use chroot instead. I do it like this:

1. Pull the 32bit image from the repository.

2. Export it to a tgz archive.

3. Extract the tgz archive to a dir (for example /data/btr/).

4. Use this script to start and stop the services inside the chroot environment:

   #!/bin/bash
   
   CHROOT='/data/btr'
   
   case "$1" in
   start)
       # mount /proc etc. to the CHROOT
       for dir in proc dev sys dev/pts
       do
           mount -o bind /$dir $CHROOT/$dir
       done
       chroot $CHROOT/ mount -a
       cp /etc/resolv.conf $CHROOT/etc/resolv.conf
   
       # start the services inside the CHROOT
       chroot $CHROOT/ /etc/init.d/mysql start
       chroot $CHROOT/ /etc/init.d/apache2 start
       ;;
   
   stop)
       # stop the services inside the CHROOT
       chroot $CHROOT/ /etc/init.d/apache2 stop
       chroot $CHROOT/ /etc/init.d/mysql stop
   
       # kill any processes that are running on CHROOT
       chroot_pids=$(for p in /proc/*/root; do ls -l $p; done | grep $CHROOT | cut -d'/' -f3)
       test -z "$chroot_pids" || (kill -9 $chroot_pids; sleep 2)
   
       # umount /proc etc. from the CHROOT
       chroot $CHROOT/ umount -a
       for dir in dev/pts sys dev proc
       do
           umount $CHROOT/$dir
       done
       ;;
   *)
       echo " * Usage: $0 {start|stop}"
   esac

[Kentoseth]

@dashohoxha

Should we keep maintaining the 32-bit repo though?

I'm sure Docker could be useful on older machines, and it may be able to live together with the 64-bit version.

[dashohoxha]

It can be used for deployment (on old machines).
But if nobody uses it, maybe there is no need to maintain it.

[ggrandes]

+1 to i386 and ARM (like raspberry & banana pi); where a hypervisor is too heavy.

[dashohoxha]

@ggrandes All the 32bit projects (https://github.com/docker-32bit) have a script build-image.sh which builds the image for the i386 arch. If you want to build images for ARM you can fork them and make some minor changes (find i386 and replace it with arm, find 32bit and replace it with ARM or something similar).
Maybe you could also improve the scripts so that they take the architecture as a parameter.

[calavera]

Hi,

as expressed in #611, this is something that Docker is not going to officially pursue, at least for now. It's great that there is someone in the community leading this effort. Please refer to those repos if you need help or have feedback about it.

I'm closing this issue. Thanks again for letting us know about your use case.

[techtonik]

LXD worked for me better as a replacement for 32-bit Docker - https://github.com/lxc/lxd