runInHost
Run a command on your host from a container.
Examples
Docker
$ docker run --privileged --pid=host guilhem/runinhost ls /boot/grub/
fonts
gfxblacklist.txt
grub.cfg
grubenv
unicode.pf2
x86_64-efi
Kubernetes
apiVersion: batch/v1
kind: Job
metadata:
name: hello-host
spec:
template:
spec:
hostPID: true # Facilitate entering the host mount namespace via init
containers:
- name: runInHost
image: guilhem/runinhost
imagePullPolicy: IfNotPresent
securityContext:
privileged: true # Give permission to nsenter /proc/1/ns/mnt
args:
- test
- -f
- /var/run/reboot-required
backoffLimit: 4
If you are using the podSecurityPolicies you can use manifests and kustomize in ./manifests.
Under The hood
runInHost is a simple wrapper that call nsenter to execute command on host.
Docker Pull Command
docker pull guilhem/runinhost