A Kubernetes addon for running an ephemeral container with a "mounted" volume.
Example:
mkdir -p ./stuff
echo "Test suite" > ./stuff/in.txt
kubectl ran busybox -e VAR1=Hello -e VAR2=world -v ./stuff:/stuff -- sh -c 'cp /stuff/in.txt /stuff/out.txt && echo "$VAR1 $VAR2" >> /stuff/out.txt'
cat ./stuff/out.txt
It works by
- Starting a container with
tail -f /dev/null
in a new pod. You can optionally specify environment variables. - Copies any "mounted" volumes into the container.
- Runs the specified command.
- Copies the "mounted" volumes back out of the container.
- Deletes the pod.
Requires the image contain tail
and tar
.