089da1c14d
The fix for #62874 introduced a race condition on startup: the postStart commands that configure the firewall run concurrently with sshguard's creation of the ipsets that the rules depend on. Unfortunately iptables fails hard when referencing an ipset that doesn't exist, so this causes non-deterministic crashlooping until sshguard wins the race. This change fixes that race condition by always creating the ipset and reconfiguring the firewall before starting sshguard, so that the order of operations is always deterministic. This change also cleans up the ipsets on sshguard shutdown, so that removing sshguard from a running system doesn't leave state behind. Fixes #65985.
Nixpkgs is a collection of packages for the Nix package manager. It is periodically built and tested by the Hydra build daemon as so-called channels. To get channel information via git, add nixpkgs-channels as a remote:
% git remote add channels https://github.com/NixOS/nixpkgs-channels.git
For stability and maximum binary package support, it is recommended to maintain
custom changes on top of one of the channels, e.g. nixos-19.03 for the latest
release and nixos-unstable for the latest successful build of master:
% git remote update channels
% git rebase channels/nixos-19.03
For pull requests, please rebase onto nixpkgs master.
NixOS Linux distribution source code is located inside
nixos/ folder.
- NixOS installation instructions
- Documentation (Nix Expression Language chapter)
- Manual (How to write packages for Nix)
- Manual (NixOS)
- Community maintained wiki
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Note: MIT license does not apply to the packages built by Nixpkgs, merely to the package descriptions (Nix expressions, build scripts, and so on). 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.