While working with one of our banking sector clients (hybrid cloud ), we encountered the error:

fatal error: SSL validation failed for https://bucket_name.s3.ap-south-1.amazonaws.com/file_name “[SSL: CERTIFICATE_ VERIFY_FAILED] certificate verify failed” (_ssl.c:727)


I was copying one file from s3 bucket to one of the newly launched servers x.x.x.x …



The purpose of this blog is not to go deep into coreDNS rather to explain how DNS works in kubernetes, what coreDNS contains and how the corefile uses plugins. So let’s get started.

Pods communication

Before talking about coreDNS, I want everyone to know how kubernetes implements DNS in clusters. Let’s say…


DevOps Engineer at Opstree Solutions

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