Cluster side CronJob for multi-cluster reporting

[bryantbiggs]

Use case

When running numerous clusters, it is challenging to run eksup from a CLI on each cluster to track and report on upgrade worthiness. Instead, I would like eksup to run on the cluster periodically and have the results sent to a central local for tracking and reporting.

Solution/User Experience

• A CronJob manifest that will run eksup periodically
• Ability to log results to stdout for a logging system to pick up
• Ability to save results to S3 directly; useful for low costs aggregation and reporting with AWS Glue and AWS Athena

Alternative solutions

Running CLI per cluster - not really scalable for more than 30+ clusters