launching-ec2-instance-with-best-practices

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• SKILL.md
• launch-ec2-instance-with-best-practices.md · references/

SKILL.md (first lines)

# Launching EC2 Instances with Best Practices

## Overview

Domain expertise for launching EC2 instances with sensible defaults optimized for security, cost-efficiency, and operational best practices. Covers AMI selection, instance type recommendation, network configuration, IAM role creation, security group hardening, storage configuration, tagging strategy, and post-launch verification.

## Launch an EC2 instance

To launch a fully configured EC2 instance with best-practice defaults, follow the procedure exactly.
See [EC2 instance launch procedure](references/launch-ec2-instance-with-best-practices.md).

The procedure handles:

- Intelligent defaults based on workload type and environment
- Network validation (VPC, subnet, public/private placement)
- AMI selection with architecture compatibility checks
- Least-privilege IAM roles for required AWS service access
- Hardened security groups with minimal port exposure
- Encrypted gp3 storage with environment-appropriate retention
- Comprehensive tagging for cost tracking and organization
- Post-launch verification and connection instructions

## Troubleshooting

### Insufficient instance capacity

Try a different availability zone or instance type (e.g., t3a instead of t3). See the full troubleshooting guide in the [launch procedure](references/launch-ec2-instance-with-best-practices.md).

### Instance immediately terminates

Check console output with `aws ec2 get-console-output`. Verify EBS volume size is sufficient and AMI is compatible with the instance type.

### Cannot connect via SSH

Verify the security group allows SSH from your IP, key file permissions are `400`, and the instance is running. Consider AWS Systems Manager Session Manager as an alternative.

From aws/agent-toolkit-for-aws, Apache-2.0.

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