AWS ParallelCluster in a single public subnet

In this configuration, all instances of the cluster must be assigned a public IP in order to get internet access. To achieve this, do the following:

• Make sure the head node is assigned a public IP address by either turning on the "Enable auto-assign public IPv4 address" setting for the subnet used in HeadNode / Networking / SubnetId or by assigning an Elastic IP in HeadNode / Networking / ElasticIp.

• Make sure the compute nodes are assigned a public IP address by either turning on the "Enable auto-assign public IPv4 address" setting for the subnet used in Scheduling / SlurmQueues / Networking / SubnetIds or by setting AssignPublicIp: true in Scheduling / SlurmQueues / Networking.

• If you define a p4d instance type, or another instance type that has multiple network interfaces or a network interface card to the head node, you must set HeadNode / Networking / ElasticIp to true to provide public access. AWS public IPs can only be assigned to instances launched with a single network interface. For this case, we recommend that you use a NAT gateway to provide public access to the cluster compute nodes. For more information on IP addresses, see Assign a public IPv4 address during instance launch in the Amazon EC2 User Guide for Linux Instances.

• You can't define a p4d or hp6id instance type, or another instance type that has multiple network interfaces or a network interface card to compute nodes because AWS public IPs can only be assigned to instances launched with a single network interface. For more information on IP addresses, see Assign a public IPv4 address during instance launch in the Amazon EC2 User Guide for Linux Instances.

For more information, see Enabling internet access in Amazon VPC User Guide.

The configuration for this architecture requires the following settings:

# Note that all values are only provided as examples
HeadNode:
  ...
  Networking:
    SubnetId: subnet-12345678 # subnet with internet gateway
    #ElasticIp: true | false | eip-12345678
Scheduling:
  Scheduler: slurm
  SlurmQueues:
    - ...
      Networking:
        SubnetIds:
          - subnet-12345678 # subnet with internet gateway
        #AssignPublicIp: true