ahmetozer / chroot-bin

execute chroot environment with symlinks

chroot-bin

Easily execute chrooted binnary from current environment without chroot command

For example your distroless application chroot dir is /apps/bash/

To execute your application, normally you can use bellow command

chroot /apps/bash/ /usr/bin/bash

With Chroot-bin, instead of long command, you can create link to chroot-bin and execute directly.

ln -s /usr/bin/chroot-bin /usr/bin/bash # One time

bash

Config

By default, application looks "/apps/"+$(basename $0) path for chdir. You can change default dir by setting CHROOTBIN_DIR_DEFAULT variable
EX. CHROOTBIN_DIR_DEFAULT="/myapps/"

Currently two option is avaible for per binnary. One of them is indicates chrootdir of the application and second one is binnary path inside the chroot dir.

This helpfull if the multiple apps is under same dir.

CHROOTBIN_DIR="bash=/apps/debian;apt=/apps/debian" ./bash

If your link name and bin name is different, you can set custom bin path

 export CHROOTBIN_DIR="ash=/apps/alpine;apk=/apps/alpine;sh=/apps/alpine" CHROOTBIN_PATH="sh=/bin/ash"
 ln -s chroot-bin sh
 ./sh
 sudo -E ./apk update