- Ensure the `/tmp/ssh_keys` directory exists.
- Download SSH host keys from S3 and unpack them to `/etc/ssh`.
- Restart the SSH service to apply the new keys.
- Add necessary variables for S3 and AWS credentials in `groupvars/all`.
- Include `ssh_host_keys` role in `cluster.yml` playbook.

Rename it because cheaha is not the only cluster we deploy against. So
give it a generic name.

A proxy node need not be a slurm client so we don't run this role

We changed it to "all" because that's the convention we follow.
When running ansible playbook you need to limit the hosts with -l
so that it doesn't run on all hosts.

Some background on why it was set to default in the first place,
`hosts: default` is used as a placeholder during development
to indicate where actual host groups will later be defined.
You can define specific host groups within the inventory
file with names that are more relevant to your infrastructure,
replacing the "default" placeholder.

Eesaan Atluri authored 2 years ago and Bo-Chun Chen committed 2 years ago

It is included separately where needed inside playbooks that build base,
compute,ood,gpu images.