AWS Systems Manager

AWS Systems Manager (SSM) is the fiercely aggressive, completely native configuration tool built directly into the DNA of the Amazon Web Services cloud. Amazon realized that developers were spinning up thousands of EC2 instances and then buying Chef or Puppet to manage them. Amazon built SSM to completely cannibalize that market by providing native, highly secure configuration management directly inside the AWS console. Its absolute biggest differentiator is "Session Manager (No SSH Required)." In legacy systems, to configure a server, you had to open Port 22 (SSH) to the internet, which is a massive security nightmare. AWS SSM uses a tiny agent that talks outward to the AWS API. An engineer can execute complex configuration scripts on 1,000 servers simultaneously through the AWS Console, without ever opening a single inbound firewall port. It heavily dominates "State Manager and Run Command." An engineer doesn't need to learn a complex DSL like Puppet. They can write a standard bash or PowerShell script, paste it into SSM "Run Command," and mathematically execute it across every single server tagged with "Environment: Production" instantly. State Manager ensures that baseline configurations (like Antivirus software) are constantly mathematically enforced on every instance.