lsofer VS Nginx

/proc is amazing once you get the hang of it and get a good understanding of what's all in there. Especially if you're doing low level performance tuning.

It's particularly helpful in larger infrastructures where tool the variability means differences in available tooling, and their output plus cli options. I'm sure /proc iteration has its own issues of variability across large infrastructres, but I haven't seen it. It's a fairly consistent API. Or at least it was, since I haven't touched a large infrastructure in some time.

When I got tired of `lsof` not being installed on hosts (or when its `-i` param isn't available) I ended up writing a script [1] that just iterates through /proc over ssh and grabs all inet sockets, environment variables, command line, etc from a set of hosts. Results in a null-delimited output that can then be fed into something like grafana to create network maps. Biggest problem with it is the use of pipes means all cores go to 100% for the few seconds it takes to run.

[1] https://github.com/red-bin/lsofer

Oh yeah, bash functions are great and absolutely abusable. Sometimes you need some grand hacks to get it to work well, but when it works well, it can do some magic. You can even export functions over ssh!

I wrote this a few years back which ran on bunches of hosts and fed into a infrastructure network mapper based on each hosts' open network sockets to other known hosts. It wasn't really feasible to install a set of tools on random hosts.. but I still had root ssh access across the board. So I needed something tool agnostic, short, auditable, and effectively guaranteed to work:

https://github.com/red-bin/lsofer/blob/master/lsofer.sh

Yeah, unless I'm looking at it wrong, there doesn't seem to be any meaningful difference between 1.25.5 and 1.26.0:

https://github.com/nginx/nginx/compare/release-1.25.5...rele...

However, it's very unlikely that .NET developers will directly expose their Kestrel-based web apps to the internet. Typically, we use other popular web servers like Nginx, Traefik, and Caddy to act as a reverse-proxy in front of Kestrel for various reasons:

> I actually don't understand why I am seeing arguments like this all the time.

Have a look at:

https://github.com/nginx/nginx/blob/master/src/http/modules/...

It's got the whole checklist: nginx idiosyncratic module system, inline parsing, custom utf conversion, buffer preallocation and adjustments, linked lists, comments about side effects of custom allocator, and probably other things.

It's not easy to deal with source like that and any serious improvement to that area would effectively be a rewrite anyway.

Since anything doing work in nginx is a module anyway, it wouldn't even have to be a full rewrite in one go.

According to this article, nGinx is being used to serve 34% of all websites in the world. I checked out who's contributing to nGinx, and just like I thought, the project has 8,208 commits, and 5,366 of those commits was made by 2 software developers; igorsoev and mdounin.

Nginx + Roadrunner (fcgi mode)

Apache’s mod_fastcgi’s last commit was 2 weeks ago:

https://svn.apache.org/viewvc/httpd/httpd/trunk/

It’s a fork of what you linked (and was more popular afaik back when fastcgi was state of the art, and apache was the undisputed champion of web servers).

These days, nginx has more market share than apache, and its fastcgi module is one of the more recently updated ones in its source tree (5 months vs multiple years):

https://github.com/nginx/nginx/tree/master/src/http/modules

If I was going to build an embedded web server, I’d start with nostd rust, probably with though axum + tokio, since thats already memory safe-ish.

If I needed fastcgi for some reason (dynamically loadable endpoints, or os-level isolation), there are at least four implementations of fastcgi for it. No idea if any are decent though.

APISIX is an API Gateway. It builds upon OpenResty, a Lua layer built on top of the famous nginx reverse-proxy. APISIX adds abstractions to the mix, e.g., Route, Service, Upstream, and offers a plugin-based architecture.