An image is a starting point
An AMI helps define the software environment from which an instance starts. Multiple instances can be launched from the same image, which supports consistent initial configurations.
The image is not the running server. After launch, each instance has its own lifecycle and can change as software is installed or configuration is updated.
Check compatibility and trust
Before selecting an image, check its publisher, operating system, processor architecture and compatibility with your intended instance type. Review licensing and any additional charges.
Prefer a trusted, maintained image appropriate for the workload. An attractive name alone is not enough evidence that an image is suitable or secure.
Maintain images over time
A custom image can capture a prepared environment for reuse. Treat it as a maintained asset: track its purpose, creation date and update process.
Do not assume an old image contains current patches. Avoid embedding credentials or sensitive application data into an image intended for reuse or sharing.
Try it yourself
Write an image-selection checklist for a Linux web server. Include publisher, architecture, maintenance, software requirements and licensing.
A common question
Does an AMI replace backups?
An image can support recovery and repeatable launches, but your backup plan must also cover changing application data and tested recovery procedures.
References & video notes
An original CloudFolks companion guide to the topic. Older video interfaces and offers may differ from current services. Use the current documentation for implementation details.
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