Run packer docker image interactively

Packer
1

Probably a simple docker thing I am overlooking as I am a bit green with docker…

How does one run the official hashicorp/packer interactively with a basic shell? Trying a vanilla docker run -it imageid doesnt work nor appending a /bin/sh to try and get a basic shell to poke around. Trying to run with a long sleep (to keep container running) and then docker exec to run some basic commands also wont work.

The hashicorp/packer image will always simple run a packer command passing back the menu of packer args.

Trying to hit the alpine shell to run some basic commands, add in some foo for ansible and other bits.

2

Feeling silly as its a simple entrypoint arg:

# get interactive
docker run --entrypoint /bin/ash -it <packerid>

#pass command to entrypoint to run
docker run --entrypoint /bin/ash it <packerid> -c "printenv"