Update to slurm docker

I have fiddle around with https://github.com/giovtorres/slurm-docker-cluster to provide containers as slurm cluter for app. I managed to get the app work to add/list users in the slurmdb. However I need to write an extra docker compose and DockerFile inherting from the Dockerfile and compose file of https://github.com/giovtorres/slurm-docker-cluster .

Reasons

• Need for static IP address on docker container. Our app needs that for the head node address.
• Need to augment Docker image https://github.com/giovtorres/slurm-docker-cluster by OpenSSH daemon and ensure generating ssh host keys, and root user with know password of docker container. Our app connects via ssh !
• Need to ensure spec Account=student exits in slurmdb before adding user.

Try accessing container via internal hostname (i.e. service name in docker compose).

Try accessing container via internal hostname (i.e. service name in docker compose).

Is not possible by default from the host to a docker container. By default only docker container can address each other via hostname or container name. Hostnames however are not visible to host machine. Would need separated dns service started or adjusted host file on host machines. Static ip address, assigned via docker compose file, works just fine.

Problems with implementing user directory management in the docker container for development

1. setquota does not work because I can not get any mount point mounted with the required mount options
   for disk quota !
2. Creating directory for user does not work because there is no local unix user in a docker container.

Suggestion to the problem

These are the following workarounds:

• Do not implement user management system in development environment. The PR would be considered done at this point.
• Do implement without setting quota in development environment and
  create local Unix user over ssh before creating directory, because
  It could take a while until it works with pulling user from LDAP db in LDAP docker container for the Linux PAM system.