7f08d0ebd8
Closes #236062 The PR #236062 was submitted because of the following problem: a synapse instance was running in a NixOS container attached to the host network and a postgresql instance on the host as database. In this setup, synapse connected to its DB via 127.0.0.1, but the DB wasn't locally set up and thus not configured in NixOS (i.e. `config.services.postgresql.enable` was `false`). This caused the assertion removed in this patch to fail. Over three years ago this assertion was introduced when this module stopped doing autoconfiguration of postgresql entirely[1] because a breaking change in synapse couldn't be managed via an auto-upgrade on our side. To make sure people don't deploy their DB away by accident, this assertion was introduced. Nowadays this doesn't serve any value anymore because people with existing instances should've upgraded by now (otherwise it's their job to carefully read the release notes when missing upgrades for several years) and people deploying fresh instances are instructed by the docs to also configure postgresql[2]. Instead, it only causes issues in corner cases like #236062, so after some discussion in that PR I think it's time to remove the assertion altogether. Also, there's no `Requires=` for `postgresql.service` in the systemd units which means that it's not strictly guaranteed that the DB is up when synapse starts up. This is fixed now by adding `requires`. To avoid being bitten by above mentioned cases again, this only happens if `config.services.postgresql.enable` is `true`. If somebody uses a non-local postgresql, but has also deployed a local postgresql instance on the synapse server (rather unlikely IMHO), it's their job to opt out of this behavior with `mkForce` (this is precisely one of the use-cases `mkForce` and friends were built for IMHO). [1] https://github.com/NixOS/nixpkgs/pull/80447 [2] https://nixos.org/manual/nixos/stable/#module-services-matrix-synapse |
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Nixpkgs is a collection of over 80,000 software packages that can be installed with the Nix package manager. It also implements NixOS, a purely-functional Linux distribution.
Manuals
- NixOS Manual - how to install, configure, and maintain a purely-functional Linux distribution
- Nixpkgs Manual - contributing to Nixpkgs and using programming-language-specific Nix expressions
- Nix Package Manager Manual - how to write Nix expressions (programs), and how to use Nix command line tools
Community
- Discourse Forum
- Matrix Chat
- NixOS Weekly
- Community-maintained wiki
- Community-maintained list of ways to get in touch (Discord, Telegram, IRC, etc.)
Other Project Repositories
The sources of all official Nix-related projects are in the NixOS organization on GitHub. Here are some of the main ones:
- Nix - the purely functional package manager
- NixOps - the tool to remotely deploy NixOS machines
- nixos-hardware - NixOS profiles to optimize settings for different hardware
- Nix RFCs - the formal process for making substantial changes to the community
- NixOS homepage - the NixOS.org website
- hydra - our continuous integration system
- NixOS Artwork - NixOS artwork
Continuous Integration and Distribution
Nixpkgs and NixOS are built and tested by our continuous integration system, Hydra.
- Continuous package builds for unstable/master
- Continuous package builds for the NixOS 23.05 release
- Tests for unstable/master
- Tests for the NixOS 23.05 release
Artifacts successfully built with Hydra are published to cache at https://cache.nixos.org/. When successful build and test criteria are met, the Nixpkgs expressions are distributed via Nix channels.
Contributing
Nixpkgs is among the most active projects on GitHub. While thousands of open issues and pull requests might seem a lot at first, it helps consider it in the context of the scope of the project. Nixpkgs describes how to build tens of thousands of pieces of software and implements a Linux distribution. The GitHub Insights page gives a sense of the project activity.
Community contributions are always welcome through GitHub Issues and Pull Requests.
For more information about contributing to the project, please visit the contributing page.
Donations
The infrastructure for NixOS and related projects is maintained by a nonprofit organization, the NixOS Foundation. To ensure the continuity and expansion of the NixOS infrastructure, we are looking for donations to our organization.
You can donate to the NixOS foundation through SEPA bank transfers or by using Open Collective:
License
Nixpkgs is licensed under the MIT License.
Note: MIT license does not apply to the packages built by Nixpkgs, merely to the files in this repository (the Nix expressions, build scripts, NixOS modules, etc.). It also might not apply to patches included in Nixpkgs, which may be derivative works of the packages to which they apply. The aforementioned artifacts are all covered by the licenses of the respective packages.