toolbox is a small script that launches a container to let you bring in your favorite debugging or admin tools.
$ /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
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
Set an /etc/passwd entry for one of the users to /usr/bin/toolbox:
useradd bob -m -p '*' -s /usr/bin/toolbox -g sudo
Now when SSHing into the system as that user, toolbox will automatically be started:
$ ssh [email protected]
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
Please use the CoreOS issue tracker to report all bugs, issues, and feature requests.
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