EC2 Checklist: 7 Things to Do After Launching an Instance

Launching an EC2 instance is only the beginning. Here is a practical checklist of 7 essential tasks to complete after launch to avoid common production issues.

EC2 Checklist: 7 Things to Do After Launching an Instance  

Launching an EC2 instance is easy.

A few clicks in the AWS Console, and your machine is running.

In reality, however, a launched instance is not a production-ready instance.

Many production incidents stem from small details that were overlooked immediately after launch:

• Misconfigured security groups
• No backups
• No monitoring
• Missing IAM role
• Poor SSH configuration
• Insufficient storage
• Missing tags

Here is a simple and practical checklist of 7 things you should verify immediately after launching an EC2 instance.

1. Review the Security Group  

This is one of the most common sources of mistakes.

Questions to ask yourself:

• Is SSH access restricted to my IP address?
• Are application ports properly limited?
• Are there any overly permissive rules (0.0.0.0/0)?
• Are unused ports closed?

Dangerous example:

SSH 22 → 0.0.0.0/0

Prefer:

SSH 22 → My IP /32

A poorly configured security group can expose your instance to the Internet within seconds.

2. Attach an IAM Role (Instance Profile)  

Never store AWS credentials directly on the machine.

Always use an IAM role.

Things to verify:

• Does the instance have an Instance Profile attached?
• Does the role provide the required permissions?
• Are permissions limited to the principle of least privilege?

Typical examples:

• S3 access
• CloudWatch access
• Systems Manager (SSM) access

Without an IAM role, you will eventually end up storing credentials somewhere on the server.

And that’s always a bad idea.

3. Configure Access Through AWS Systems Manager (Recommended)  

SSH should no longer be your primary access method.

AWS Systems Manager provides:

• Access without opening port 22
• IAM-based authentication
• Auditable access logs
• Recorded sessions

Verify that:

• The SSM Agent is installed
• The IAM role includes SSM permissions
• The instance appears in Systems Manager

Key benefit:

No public IP address is required.

4. Review Storage Configuration (EBS)  

By default, the root volume is often too small.

Things to verify:

• Volume size
• Volume type (gp3 is recommended)
• Encryption enabled
• Delete-on-termination settings

Important considerations:

• Sufficient root volume size
• Separate data volumes when appropriate
• Snapshot strategy

A classic failure scenario:

Instance healthy → Disk full → Service outage

5. Enable CloudWatch Monitoring  

By default, monitoring is minimal.

Verify that:

• Detailed Monitoring is enabled
• The CloudWatch Agent is installed
• Logs are sent to CloudWatch Logs

Useful metrics include:

• CPU utilization
• Memory usage
• Disk utilization
• Application logs

Without monitoring, troubleshooting becomes significantly harder.

6. Add Resource Tags  

Always tag your resources.

Recommended minimum:

Name
Environment
Project
Owner
CostCenter

Why are tags important?

• Cost allocation
• Resource organization
• Automation
• Security governance
• Operational scripts
• Terraform/CDK workflows

Without proper tagging, an AWS account quickly becomes difficult to manage.

7. Plan Your Backup Strategy  

Running an EC2 instance without backups is a risk.

Possible backup options:

• EBS Snapshots
• AWS Backup
• Regular AMI creation
• Application-level backups

Questions to ask:

• What happens if the volume is lost?
• How long would recovery take?
• Is the data stored elsewhere?

A simple rule:

If losing the machine would be a problem, you need a backup strategy.

Conclusion  

Launching an EC2 instance is easy.

Running it reliably requires discipline.

The 7 essential checks are:

1. Security Groups 2. IAM Roles 3. Systems Manager (SSM) 4. Storage 5. Monitoring 6. Tags 7. Backups

These details are what separate:

• A successful test environment
• A reliable production environment

In the cloud, reliability rarely comes from technology alone.

It comes from operational discipline.

🔗 Useful Resource  

• AWS EC2 Official Documentation: https://aws.amazon.com/ec2/