server

Running a web server in Kubernetes is easy, but a mail server is more challenging. Most of the challenges have to do with your IP infrastructure, ingress, and load balancer within Kubernetes. Here are things I learned when deploying a mail server based on Postfix on Kubernetes with MetalLB and NGINX ingress. If you have a different setup, things might or might not apply. Prevent mail loops on your secondary MX Your Postfix MX pod is maybe running on a private IP RFC1918, which is fine....

When I was looking at some Nginx caching settings to improve them on a load balanced static content farm. I noticed that the etag headers difference between servers for the same file when they should be the same. So first what is a etag header? From WikipediA The ETag or entity tag is part of HTTP, the protocol for the World Wide Web. It is one of several mechanisms that HTTP provides for web cache validation, which allows a client to make conditional requests....