1. First run a simple container

docker run --name softhsm -i -t cremuzzi/softhsm2 ash

2. then initialize a new token

from the container's interactive shell:

softhsm2-util --init-token --slot 0 --label "My token 1"

1. Create a data directory on a suitable volume on your host system, e.g. /my/own/tokens

2. Start your softhsm container like this:

docker run --name softhsm -i -t -v /my/own/tokens:/tokens cremuzzi/softhsm2 ash

For more information on SoftHSMv2 please visit the main project on https://github.com/opendnssec/SoftHSMv2