nixops VS patchelf

As far as I know, it’s still about [0]. I’ve had a better experience with deploy-rs though [1] - or even just using nixos-rebuild to target the remote machine.

[0] - https://github.com/NixOS/nixops

For example Nix can already replace ansible, packer, cloudformation[1], dockerfiles.

Nix can also ship the nixpkgs as an oci image (e.g. docker image), vm image, iso, or if you're able to: as a nixos configuration. Tools like nixops can allow you to deploy many machines and have their behavior exactly specified, and the configuration can be version controlled. NixOS configuration can be thought of as congruent configuration management, where many other tools give you many less guarantees about configuration drift and reproducibility.

There are 4 tools I'm taking into consideration right now, but every suggestion is welcome: 1. deploy-rs - I don't know anything about it, heard about it like a day or two ago 2. NixOps - the official one, I don't know what to think, but I have concerns about Flakes compatibility 3. morph - I understand this as "NixOps, but better", no more toughs. 4. colmena - seems to be pretty straightforward with quite nice docs

I'm still relatively new to NixOS, having switched all my personal systems over to it this spring/summer. I don't have a detailed answer to your question, but I believe NixOPs is the canonical way to do what you're describing in production/at scale:

https://github.com/NixOS/nixops

https://nixos.org/nixops/manual/

Nixops is specifically made for purposes like yours.

Well, everyone of course! But especially devops, developers, power-users, and ricer folks. Due to the declarative and purity aspect of nixpkgs, all builds and configurations can be version controlled, cached and shared. NixOS can easily be extended to produce docker images, vm images, or even distributed deployments. You can also write reproducible multi-node integration tests. Tinkerers! Love playing around with the latest desktop manager or modifying builds? Nixpkgs allows you to modify any package you wish to, locally! Nixpkgs is actually a source distribution but its guarantees around purity and reproducibility are so strong that you can get a binary cache "for free".

You could use NixOps[0] for Nix but I'm not sure you can directly compare Terraform and Guix/Nix? My set up involves Terraform for infrastructure and Nix for provisioning, and it's working for me so far.

[0] https://github.com/NixOS/nixops

I'll have to read more about NixOps though, I had kind of forgotten that it existed!

Kind of off topic, but I would love to have NixOps (https://github.com/NixOS/nixops) as an abstraction layer for every type of cloud service, and not just virtual machines (e.g. queues, object storages, etc).

There is Terraform and Ansible, of course, but Nix seems like it could combine the strengths of both of them.

I mean, we don't have to hack the elf loader if we just rewrite every elf binary using patchelf: https://github.com/NixOS/patchelf

The parent commenter is already suggesting "just run a regex", so it seems like a trivial extension to their simple solution to "just run patchelf on every binary on your system"

Patching paths in text files typically used substituteInPlace (including in cowsay). For dynamic libraries, patchelf is typically used.

Install patchelf.

Thank you! I followed the instruction here, but it looks like I didn't actually install it, because my pacman -Q patchelf did not find anything. Maybe I was missing a dependency. Also, it was late so I didn't pay attention to warnings at the time.

How does an article on NixOS talk about the `rpath` issue without also mentioning the `patchelf` utility that NixOS developers created to solve this issue? It's a small tool that lets you modify ELF executables and binaries. It's also the recommended way for NixOS users to modify binaries to work properly.

https://github.com/NixOS/patchelf

So install it? https://github.com/NixOS/patchelf

NixOS doesn't have stable paths to shared libraries like macOS or other linux distributions (and this is the core feature) and always need to patch elf for current paths ( https://github.com/NixOS/patchelf ).