关于Amazon Inspector监控范围及Auto-Scale配置的技术咨询

How does Amazon Inspector monitor EC2 instances? #

Amazon Inspector depends on the Amazon Inspector Agent running locally on each EC2 instance you want to monitor. It won’t automatically cover every instance in your infrastructure by default—only those with the agent installed will be scanned, and their data will show up in the Inspector console for analysis.

The agent collects details about the instance’s vulnerabilities, configuration gaps, and compliance status locally, then sends that data back to the Inspector service. You can manage all monitored instances from a central AWS Console, but the agent itself is a required local component on each target instance.

Can Auto Scaling instances pre-install the Inspector Agent? #

Absolutely! There are two straightforward ways to ensure new Auto Scaling instances come with the Inspector Agent ready to go:

1. Use a Custom AMI #

• Spin up a base EC2 instance, install the Inspector Agent on it, set it to start automatically on boot, then create a custom AMI from this configured instance.
• Update your Auto Scaling Launch Template or Launch Configuration to use this custom AMI. Every new instance launched by Auto Scaling will inherit the pre-installed agent.

2. Embed a Installation Script in User Data #

If maintaining a custom AMI feels like extra overhead, you can add a script to the user data section of your Auto Scaling launch setup. This script will install the agent automatically when the instance boots up.

Example scripts for common OS types:

• Amazon Linux 2/RHEL/CentOS:

  #!/bin/bash
  yum install -y amazon-inspector-agent
  systemctl enable amazon-inspector-agent
  systemctl start amazon-inspector-agent
  

• Ubuntu/Debian:

  #!/bin/bash
  apt-get update
  apt-get install -y amazon-inspector-agent
  systemctl enable amazon-inspector-agent
  systemctl start amazon-inspector-agent
  

Important: Don’t Skip IAM Permissions #

Make sure the IAM role attached to your Auto Scaling instances has the AmazonInspectorFullAccess managed policy (or a custom policy with equivalent permissions). This lets the Inspector Agent securely communicate with the AWS Inspector service and send data for analysis.

内容的提问来源于stack exchange，提问作者Ehab Al khashman