This month has mostly been about golang. I've continued work on the protocol-tester that I recently introduced:
This has turned into a fun project, and now all my monitoring done with it. I've simplified the operation, such that everything uses Redis for storage, and there are now new protocol-testers for
nntp, and more.
Sample tests are as basic as this:
mail.steve.org.uk must run smtp mail.steve.org.uk must run smtp with port 587 mail.steve.org.uk must run imaps https://webmail.steve.org.uk/ must run http with content 'Prayer Webmail service'
Results are stored in a redis-queue, where they can picked off and announced to humans via a small daemon. In my case alerts are routed to a central host, via HTTP-POSTS, and eventually reach me via the pushover
As a result of this rewrite, and a little more care, I now score 99/100 + 100/100 on Google's pagespeed testing service. A few more of my sites do the same now, thanks to inline-CSS, inline-JS, etc. Nothing I couldn't have done before, but this was a good moment to attack it.
Finally my "silly" Linux security module, for letting user-space decide if binaries should be executed, can-exec has been forward-ported to v4.16.17. No significant changes.
Over the coming weeks I'll be trying to move more stuff into the cloud, rather than self-hosting. I'm doing a lot of trial-and-error at the moment with Lamdas, containers, and dynamic-routing to that end.