jpetazzo / docker-busybox

Busybox for Stackbrew

Jpetazzo's Busybox Image Builders

A.k.a. "The Little Containers That Could!"

This repository contains:

• a rootfs.tar archive suitable to build a minimal Docker image, based on Busybox;
• a Dockerfile referencing this tarball, suitable for inclusion into Stackbrew;
• multiple subdirectories providing Dockerfiles to build this tarball.

The goal of the latter is to solve a difficult question, id est "who builds the builders?".

Those meta-builders are called "tarmakers". They obey the following "API":

• they are built with a Dockerfile themselves;
• the Dockerfile doesn't use any local content (no ADD of local file);
• they generate rootfs.tar in their root directory.

The script mkrootfs.sh is a helper to build rootfs.tar. It requires as first and only argument the name of a subdirectory containing a tarmaker.

The following tarmakers are available:

• buildroot: uses the Buildroot toolchain to compile everything from scratch (WARNING: THIS IS SLOW, it takes half an hour on my quad-core laptop with badass SSDs, so it will probably take a few hours in a typical VM!)
• ubuntu: installs the busybox-static Ubuntu package and use it as the base for the newly built image. This is very fast but the resulting image is a bit bigger, because we have to slap a few fat greasy libraries on top of it. Would you like some fries with that?

To rebuild a busybox image using one tarmaker or the other...

# Use buildroot or ubuntu
TARMAKER=ubuntu
./mkrootfs.sh tarmaker-ubuntu
docker build -t busybox .
docker run -t -i busybox

docker-busybox's Issues

Enable httpd in busybox image

httpd is such an useful applet in busybox.

httpd
httpd [-ifv[v]] [-c CONFFILE] [-p [IP:]PORT] [-u USER[:GRP]] [-r REALM] [-h HOME] or httpd -d/-e/-m STRING

Listen for incoming HTTP requests

Options:

        -i              Inetd mode
        -f              Do not daemonize
        -v[v]           Verbose
        -c FILE         Configuration file (default httpd.conf)
        -p [IP:]PORT    Bind to ip:port (default *:80)
        -u USER[:GRP]   Set uid/gid after binding to port
        -r REALM        Authentication Realm for Basic Authentication
        -h HOME         Home directory (default .)
        -m STRING       MD5 crypt STRING
        -e STRING       HTML encode STRING
        -d STRING       URL decode STRING

From: http://www.busybox.net/downloads/BusyBox.html

Mistakenly opened it here : docker-library/official-images#783

bash shell is not included

could bash be added? its only small and a lot of scripts are written in bash

busybox:uclibc (aka latest) only allows 3 DNS search paths

Not sure if this is the right place to file issues on busybox, but the hub page links here.

busybox:glibc works correctly, busybox:uclibc does not. :latest is currently tagged as :uclibc - it looks like this was updated today.

BusyBox 1.23.1 (stable)

A new version of BusyBox was released today. If you could update to it, that'd be swell.

Thanks! 😉

Cannot run static golang binaries when building on arch linux

I just recently switched from using linux mint to arch linux as my host system.

The golang is built using

CGO_ENABLED=0 GOOS=linux go build -a -tags netgo -ldflags '-w' .

I'm using the same build files and everything, however once I build the image it cannot run the static binary. It results in a No such file or directory error.

Even if I run the image built on arch I cannot run it on another system as the error persists. I can build on debian, ubuntu and it works properly.

$ sudo docker info
Containers: 20
Images: 255
Storage Driver: devicemapper
  Pool Name: docker-8:7-4458443-pool
  Pool Blocksize: 65.54 kB
  Backing Filesystem: extfs
  Data file; /dev/loop1
  Metadata file: /dev/loop1
  Data Space Used: 5.341 GB
  Data Space Total: 107.4 GB
  Metadata Space Used: 10.78 MB
  Metadata Space Total: 2.147 GB
  Udev Sync Supported: true
  Data loop file: /var/lib/docker/devicemapper/devicemapper/data
  Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
  Library Version: 1.02.93 (2015-01-30)
Execution Driver: native-0.2
Kernel Version: 3.18.6-1-ARCH
Operating System: Arch Linux
CPUs: 4
Total Memory: 7.509 GiB
Name: moosilauke
ID: FR3R:2GHU:5SWC:6IP4:YV5Q:MNDD:6TJX:AGDE:QG6R:LYX0:PRCD:P2ZE
WARNING: No swap limit support

Image does not correctly implement init system

In an ideal situation, PID 1 should be an init system rather than /bin/sh as presently found in the image.

Busybox has an integrated init system (/bin/init) that is suitable, so modifications should be made to reflect this. Alternatively, a system such as runit could be used as seen in baseimage-docker.

ip addr segfault

user@host ~ $ docker run --rm -i -t busybox:latest  /bin/sh
/ # ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
Segmentation fault
/ # 

Running on CoreOS 353, Docker 1.0

most recent image on docker hub appears su isn't setuid

su: must be suid to work properly
docker run busybox ls -l /bin/su
-rwxr-xr-x 359 root root 1014672 Sep 18 20:40 /bin/su

invalid tar magic with some .tar.gz files

Using this docker image I encount a problem when attempting to install GNU Make on it.

I'm not familiar with busybox and so, but I think it could be possible to install GNU Make.

So what I do is:

wget http://ftp.gnu.org/gnu/make/make-4.0.tar.gz
gunzip -c make-4.0.tar.gz |tar xvf -

As I use wget, gunzip and tar, I don't know if the problem comes from gunzip, tar or wget…

Have you any clue about this?

Thanks in advance.

Difficult time running java

Seems like a few symlinks or something of that nature would make it easier to run openjdk/oracle jdk/jre.