Automated SSH Key Injection for AI Workload Orchestration

Question

Pulumi · Accepted Answer

Automating SSH key injection can be an important part of setting up AI workload orchestration, especially when dealing with multiple virtual machines or instances that need to communicate securely. This process involves generating an SSH key pair, storing the public key with your cloud infrastructure, and ensuring that the private key is securely stored and used by your orchestration tools to access the instances.

For the sake of this example, I will guide you through automating SSH key injection using AWS as the cloud provider. We will be creating an EC2 instance and injecting an SSH key into it using Pulumi's Python SDK.

Before we begin writing code, ensure you have the following prerequisites:

1. Pulumi CLI installed.
2. AWS CLI installed and configured with appropriate access rights.
3. Python programming environment set up.
4. Pulumi program set up with the AWS provider.

Below is the detailed Python program that performs automated SSH key injection into an AWS EC2 instance for AI workload orchestration:

```python
import pulumi
import pulumi_aws as aws

# Step 1: Generate a new Key Pair for SSH access
# The KeyPair resource will create a new key pair and return the private key, which should be stored securely.
ssh_key = aws.ec2.KeyPair("aiWorkloadKeyPair", public_key="ssh-rsa AAAAB3NzaC...")

# Step 2: Create a new EC2 instance
# We will use the most recent Amazon Linux 2 AMI for the instance.
# We also associate the generated KeyPair for SSH access.
# Note: For production, you should never hard-code the AMI ID, as it can change.
# Instead, use the aws.ec2.get_ami data source to dynamically fetch the latest AMI ID.
ec2_instance = aws.ec2.Instance('aiWorkloadInstance',
    instance_type="t2.micro",
    ami="ami-0c55b159cbfafe1f0",  # Example AMI ID; replace this with a valid one
    key_name=ssh_key.key_name,
    tags={"Name": "aiWorkloadInstance"})

# Step 3: Export the instance details
# We export the public DNS of the EC2 instance which can be used to SSH into.
pulumi.export('instance_public_dns', ec2_instance.public_dns)
pulumi.export('key_pair_name', ssh_key.key_name)
```

This program does the following:

1. **Create SSH Key Pair:** We create a new SSH key pair using `aws.ec2.KeyPair`. This will be used to SSH into the EC2 instance. The `public_key` parameter must be supplied with your own public SSH key. The example key given is just a placeholder and not a real key.

2. **Launch EC2 Instance:** We then create a new EC2 instance to run our AI workloads. We reference the key pair created in step 1 by setting the `key_name` attribute with the name of the key pair, which allows the EC2 instance to be accessed using the corresponding private key. The `ami` attribute selects the Amazon Machine Image for the instance; in production, you should use a dynamic lookup to find the latest AMI that suits your needs.

3. **Export Instance Information:** Finally, we export the public DNS name of the instance and the name of the SSH key pair. The public DNS name can be used to access the instance via SSH, and the key name is useful for referencing in other parts of your infrastructure if needed.

Please ensure that you replace the placeholder SSH public key with your real public SSH key content and also update the AMI ID with the latest Amazon Linux 2 AMI ID for your specific AWS region.