This template sets up an HPC cluster with master and worker nodes, with MPI (MPICH and OpenMPI) and Spack available. A temporary bootstrap node handles the setup and configuration, and the users can load MPI or install/load other packages using Spack or Lmod(Lua Modules).

This appliance accepts the following parameters:

• reservation_flavor: Flavor of the reservation for master and worker nodes.
• bootstrapnode_reservation_flavor: Flavor of the reservation for the bootstrap node.
• network_name: Name of the network.
• image_name: Name of the image to be used by the cluster. Must be one of the following: Ubuntu22.04-HPC-MPI-Spack, Ubuntu22.04-HPC-MPI-Spack-CUDA, or Ubuntu22.04-HPC-MPI-Spack-ROCm. Defaults to Ubuntu22.04-HPC-MPI-Spack.
• worker_count: Number of worker nodes. Defaults to 1.
• spack_packages: List of additional Spack packages to install.
• private_key_content: Contents of the SSH private key.
• public_key_content: Contents of the SSH public key, allowing login into instances.

The following outputs are provided:

• master_ip: Floating IP of the master node.
• keypair_name: Name of the MPI keypair used.