I’ve been avoid Docker for a very long time. I started my career as a sysadmin setting up servers running FreeBSD and early versions of Debian on bare-bone servers. As soon as “cloud” came into to the market I switch to AWS, and GCE and have been using them since then. EC2 was my always goto choice to quickly deploy something on the internet. But Docker — from some reason I was avoiding it until this 2 years ago, when I actually started using it. Without to much trust but…

But today history is not about my love & hate relationship with docker, but about trying to deploy Go application and VIPS library. Couple problems appeared during the process and it’s worth mentioning it for future generations because could find much help around my issues.

Dealing with DNS changes can be annoying and frustrating. Changes are not visible straight away, you have to wait to see them. Thet are not even. Here you can find links to clear cached records in popular public DNS servers: Flushing DNS cache Flush Google Public DNS Cache Purge Cloudflare Public DNS Cache Checking results You can check results here: IntoDNS Refresh OpenDNS Cache DNSSEC Tools DNSViz.

I was building simple worker using Go & VIPS o do some kind of magic with images. I chose VIPS because is blazing fast in comparison with other Go image processing libraries. So this is the story about what went wrong. Because my DEV setup is Apple MacBook Pro with M1 Apple Silicon it’s always tricky to compile something to the proper architecture. Installing VIPS on my machine it’s pretty straight forward:

You can find some online API’s use free tier to test them, but… you can make it your own. So without any further intruction here is a reciepe.

Recently one of my clients contacted me asking if I can make a change. Shrink a little bit huge margins on PDF delivery slips. The task wasn’t easy because settings is bit hidden in the files. By modifying templates you can change font size, and amend or remove elements from the printout. Unfortunately you can’t actually decrease margin on PDF printout.