Package: docker.io
Version: 0.8.0+dfsg1-2
Severity: important
Dear Maintainer,
I have a 64bit machine running a 64bit kernel and 32bit userspace.
After installing the package I tried to run the first command in the tutorial
and the error message was less than helpful:
$ docker.io run debian echo hello world
2014/02/23 17:59:07 dial unix /var/run/docker.sock: no such file or
directory
After a few searches about what that probably meant I ran accross someone
suggesting I set the DOCKER_HOST environment variable to tcp://. It still did
not work but the message was more helpful and exactly what I suspected was
happening:
$ DOCKER_HOST=tcp:// docker.io run debuan echo hello world
2014/02/23 18:02:46 Can't connect to docker daemon. Is 'docker -d'
running on this host?
Which was confusing because the daemon reported to have started successfully
after installation:
[...]
Setting up libapparmor1:i386 (2.8.0-5+b1) ...
Setting up lxc (0.9.0~alpha3-2+deb8u1) ...
Setting up docker.io (0.8.0+dfsg1-2) ...
Adding group `docker' (GID 121) ...
Done.
[ ok ] Starting Docker: docker.io.
Processing triggers for libc-bin (2.17-97) ...
Press Return to continue.
I tried to start the daemon myself:
# /etc/init.d/docker.io status
[FAIL] docker is not running ... failed!
Unfortunately, there were no logs whatsoever about what could have gone wrong:
# grep -ri docker /var/log/*
/var/log/apt/history.log:Install: lxc:i386 (0.9.0~alpha3-2+deb8u1,
automatic), libapparmor1:i386 (2.8.0-5+b1, automatic), docker.io:i386
(0.8.0+dfsg1-2)
/var/log/apt/term.log:Selecting previously unselected package
docker.io.
/var/log/apt/term.log:Preparing to unpack
..../docker.io_0.8.0+dfsg1-2_i386.deb ...
/var/log/apt/term.log:Unpacking docker.io (0.8.0+dfsg1-2) ...
/var/log/apt/term.log:Setting up docker.io (0.8.0+dfsg1-2) ...
/var/log/apt/term.log:Adding group `docker' (GID 121) ...
[ ok log/apt/term.log:[....] Starting Docker: docker.io.
/var/log/aptitude:[INSTALL] docker.io:i386
/var/log/auth.log:Feb 23 17:58:07 waterworld groupadd[17978]: group
added to /etc/group: name=docker, GID=121
/var/log/auth.log:Feb 23 17:58:07 waterworld groupadd[17978]: group
added to /etc/gshadow: name=docker
/var/log/auth.log:Feb 23 17:58:07 waterworld groupadd[17978]: new
group: name=docker, GID=121
/var/log/dpkg.log:2014-02-23 17:58:04 install docker.io:i386 <none>
0.8.0+dfsg1-2
/var/log/dpkg.log:2014-02-23 17:58:04 status half-installed
docker.io:i386 0.8.0+dfsg1-2
/var/log/dpkg.log:2014-02-23 17:58:04 status unpacked docker.io:i386
0.8.0+dfsg1-2
/var/log/dpkg.log:2014-02-23 17:58:05 status unpacked docker.io:i386
0.8.0+dfsg1-2
/var/log/dpkg.log:2014-02-23 17:58:06 configure docker.io:i386
0.8.0+dfsg1-2 <none>
/var/log/dpkg.log:2014-02-23 17:58:06 status unpacked docker.io:i386
0.8.0+dfsg1-2
/var/log/dpkg.log:2014-02-23 17:58:07 status unpacked docker.io:i386
0.8.0+dfsg1-2
/var/log/dpkg.log:2014-02-23 17:58:07 status unpacked docker.io:i386
0.8.0+dfsg1-2
/var/log/dpkg.log:2014-02-23 17:58:07 status unpacked docker.io:i386
0.8.0+dfsg1-2
/var/log/dpkg.log:2014-02-23 17:58:07 status half-configured
docker.io:i386 0.8.0+dfsg1-2
/var/log/dpkg.log:2014-02-23 17:58:07 status installed docker.io:i386
0.8.0+dfsg1-2
After reading through /etc/init.d/docker.io I ran the following and got a
useful message out:
# start-stop-daemon --start --exec /usr/bin/docker.io --pidfile
/var/run/docker.io.pid -- -d -p /var/run/docker.io.pid
2014/02/23 18:07:11 The docker runtime currently only supports amd64 (not 386).
This will change in the future. Aborting.
I do understand that non-amd64 hosts are not supported (as mentioned in the
description of the package). Then again I think it would be best to have the
failure be more prominent about what is not working instead of silently
failing.
Another alternative (that I prefer, but I trust your decision and time) would
be to change docker.io's code to actually start the daemon in a "unsupported"
platforms. It appears to be a 2-line change in server.go [1]
[1] http://mwhiteley.com/linux-containers/2013/08/31/docker-on-i386.html
Best regards,
Toote
-- System Information:
Debian Release: jessie/sid
APT prefers testing
APT policy: (990, 'testing')
Architecture: i386 (x86_64)
Kernel: Linux 3.12-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages docker.io depends on:
ii adduser 3.113+nmu3
ii init-system-helpers 1.14
ii iptables 1.4.21-1
ii lxc 0.9.0~alpha3-2+deb8u1
ii perl 5.18.2-2
Versions of packages docker.io recommends:
pn aufs-tools <none>
ii ca-certificates 20130906
ii xz-utils 5.1.1alpha+20120614-2
docker.io suggests no packages.
-- no debconf information
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