rhcos-toolbox: use same options for non default images

Using a Fedora image instead of the RHEL support tools image for
toolbox was causing an error only when running from an `oc debug
node` pod.  There are no issues when running directly on RHEL
CoreOS.  Adding the podman `--pid=host` option fixes the error
but only when usding `podman run`.  There seems to be a difference
between `podman run` and `podman create`, `podman start`, and
`podman exec`.

There was also a difference on the second invocation of toolbox if
a container was already created.  The first invocation would use
the images' CMD and the second would use /bin/sh if no command was
passed in.  The second invocation will now use the images' CMD
when executing into the container for a more consistent experience.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1850230
1 file changed
tree: 7341960a43e95fc3bb9fec0168886697a61e4332
  1. .github/
  2. code-of-conduct.md
  4. DCO
  7. README.md
  8. rhcos-toolbox
  9. rhcos-toolbox.spec
  10. toolbox

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.

There are currently two scripts that live within this repository:

  • toolbox: designed for Container Linux, uses rkt and systemd-nspawn
  • rhcos-toolbox: designed for Red Hat CoreOS, uses podman


$ /usr/bin/toolbox
Spawning container core-fedora-latest on /var/lib/toolbox/core-fedora-latest.
Press ^] three times within 1s to kill container.
[root@localhost ~]# dnf -y install tcpdump
[root@localhost ~]# 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
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


core@core-01 ~ $ cat ~/.toolboxrc
core@core-01 ~ $ toolbox
Spawning a container 'toolbox-test' with image 'registry.redhat.io/rhel7/rhel-tools:latest'

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,rkt

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

$ ssh bob@hostname.example.com
Container Linux by CoreOS alpha (1284.0.0)
Spawning container bob-fedora-latest on /var/lib/toolbox/bob-fedora-latest.
Press ^] three times within 1s to kill container.
[root@localhost ~]# dnf -y install emacs-nox
[root@localhost ~]# emacs /media/root/etc/systemd/system/docker.service


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