toolbox - bring your tools with you

toolbox is a small script that launches a container to let you bring in your favorite debugging or admin tools.

Usage

$ /usr/bin/toolbox
Spawning container core-fedora-latest on /var/lib/toolbox/core-fedora-latest.
Press ^] three times within 1s to kill container.
-bash-4.3# yum install tcpdump
...
-bash-4.3# tcpdump -i ens3
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ens3, link-type EN10MB (Ethernet), capture size 65535 bytes

Advanced Usage

Use a custom image

toolbox uses a Fedora-based userspace environment by default, but this can be changed to any Docker image. Simply override environment variables in $HOME/.toolboxrc:

core@core-01 ~ $ cat ~/.toolboxrc
TOOLBOX_DOCKER_IMAGE=ubuntu-debootstrap
TOOLBOX_DOCKER_TAG=14.04
core@core-01 ~ $ toolbox
Spawning container core-ubuntu-debootstrap-14.04 on /var/lib/toolbox/core-ubuntu-debootstrap-14.04.
Press ^] three times within 1s to kill container.
root@core-01:~# apt-get update && apt-get install tcpdump

Automatically enter toolbox on login

Set an /etc/passwd entry for one of the users to /usr/bin/toolbox:

useradd bob -m -p '*' -s /usr/bin/toolbox -U -G sudo,docker

Now when SSHing into the system as that user, toolbox will automatically be started:

$ ssh bob@hostname.example.com
CoreOS alpha (633.1.0)
...
Spawning container core-fedora-latest on /var/lib/toolbox/core-fedora-latest.
-bash-4.3 # yum install emacs
-bash-4.3 # emacs /media/root/etc/systemd/system/docker.service

Bugs

Please use the CoreOS issue tracker to report all bugs, issues, and feature requests.