-
Notifications
You must be signed in to change notification settings - Fork 37
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
This feature was introduced in NixOS/nixpkgs#269551 and is mostly useful for servers. Saves around 80MiB of evaluation on x86_64 due to the extra i686 nixpkgs instance.
- Loading branch information
Showing
2 changed files
with
110 additions
and
98 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,89 +1,95 @@ | ||
| # A default configuration that applies to all servers. | ||
| # Common configuration accross *all* the machines | ||
| { pkgs, lib, ... }: | ||
| { options, pkgs, lib, ... }: | ||
| { | ||
|
|
||
| imports = [ | ||
| ../common | ||
| ]; | ||
|
|
||
| # List packages installed in system profile. | ||
| environment.systemPackages = map lib.lowPrio [ | ||
| pkgs.curl | ||
| pkgs.dnsutils | ||
| pkgs.gitMinimal | ||
| pkgs.htop | ||
| pkgs.jq | ||
| pkgs.tmux | ||
| ]; | ||
|
|
||
| # Notice this also disables --help for some commands such es nixos-rebuild | ||
| documentation.enable = lib.mkDefault false; | ||
| documentation.info.enable = lib.mkDefault false; | ||
| documentation.man.enable = lib.mkDefault false; | ||
| documentation.nixos.enable = lib.mkDefault false; | ||
|
|
||
| # No need for fonts on a server | ||
| fonts.fontconfig.enable = lib.mkDefault false; | ||
|
|
||
| programs.vim.defaultEditor = lib.mkDefault true; | ||
|
|
||
| # Print the URL instead on servers | ||
| environment.variables.BROWSER = "echo"; | ||
|
|
||
| # Make sure firewall is enabled | ||
| networking.firewall.enable = true; | ||
|
|
||
| # Delegate the hostname setting to dhcp/cloud-init by default | ||
| networking.hostName = lib.mkDefault ""; | ||
|
|
||
| # If the user is in @wheel they are trusted by default. | ||
| nix.settings.trusted-users = [ "root" "@wheel" ]; | ||
|
|
||
| security.sudo.wheelNeedsPassword = false; | ||
|
|
||
| # Enable SSH everywhere | ||
| services.openssh.enable = true; | ||
|
|
||
| # No need for sound on a server | ||
| sound.enable = false; | ||
|
|
||
| # UTC everywhere! | ||
| time.timeZone = lib.mkDefault "UTC"; | ||
|
|
||
| # No mutable users by default | ||
| users.mutableUsers = false; | ||
|
|
||
| systemd = { | ||
| # Given that our systems are headless, emergency mode is useless. | ||
| # We prefer the system to attempt to continue booting so | ||
| # that we can hopefully still access it remotely. | ||
| enableEmergencyMode = false; | ||
|
|
||
| # For more detail, see: | ||
| # https://0pointer.de/blog/projects/watchdog.html | ||
| watchdog = { | ||
| # systemd will send a signal to the hardware watchdog at half | ||
| # the interval defined here, so every 10s. | ||
| # If the hardware watchdog does not get a signal for 20s, | ||
| # it will forcefully reboot the system. | ||
| runtimeTime = "20s"; | ||
| # Forcefully reboot if the final stage of the reboot | ||
| # hangs without progress for more than 30s. | ||
| # For more info, see: | ||
| # https://utcc.utoronto.ca/~cks/space/blog/linux/SystemdShutdownWatchdog | ||
| rebootTime = "30s"; | ||
| config = { | ||
| # List packages installed in system profile. | ||
| environment.systemPackages = map lib.lowPrio [ | ||
| pkgs.curl | ||
| pkgs.dnsutils | ||
| pkgs.gitMinimal | ||
| pkgs.htop | ||
| pkgs.jq | ||
| pkgs.tmux | ||
| ]; | ||
|
|
||
| # Notice this also disables --help for some commands such es nixos-rebuild | ||
| documentation.enable = lib.mkDefault false; | ||
| documentation.info.enable = lib.mkDefault false; | ||
| documentation.man.enable = lib.mkDefault false; | ||
| documentation.nixos.enable = lib.mkDefault false; | ||
|
|
||
| # No need for fonts on a server | ||
| fonts.fontconfig.enable = lib.mkDefault false; | ||
|
|
||
| programs.vim.defaultEditor = lib.mkDefault true; | ||
|
|
||
| # Print the URL instead on servers | ||
| environment.variables.BROWSER = "echo"; | ||
|
|
||
| # Make sure firewall is enabled | ||
| networking.firewall.enable = true; | ||
|
|
||
| # Delegate the hostname setting to dhcp/cloud-init by default | ||
| networking.hostName = lib.mkDefault ""; | ||
|
|
||
| # If the user is in @wheel they are trusted by default. | ||
| nix.settings.trusted-users = [ "root" "@wheel" ]; | ||
|
|
||
| security.sudo.wheelNeedsPassword = false; | ||
|
|
||
| # Enable SSH everywhere | ||
| services.openssh.enable = true; | ||
|
|
||
| # No need for sound on a server | ||
| sound.enable = false; | ||
|
|
||
| # UTC everywhere! | ||
| time.timeZone = lib.mkDefault "UTC"; | ||
|
|
||
| # No mutable users by default | ||
| users.mutableUsers = false; | ||
|
|
||
| systemd = { | ||
| # Given that our systems are headless, emergency mode is useless. | ||
| # We prefer the system to attempt to continue booting so | ||
| # that we can hopefully still access it remotely. | ||
| enableEmergencyMode = false; | ||
|
|
||
| # For more detail, see: | ||
| # https://0pointer.de/blog/projects/watchdog.html | ||
| watchdog = { | ||
| # systemd will send a signal to the hardware watchdog at half | ||
| # the interval defined here, so every 10s. | ||
| # If the hardware watchdog does not get a signal for 20s, | ||
| # it will forcefully reboot the system. | ||
| runtimeTime = "20s"; | ||
| # Forcefully reboot if the final stage of the reboot | ||
| # hangs without progress for more than 30s. | ||
| # For more info, see: | ||
| # https://utcc.utoronto.ca/~cks/space/blog/linux/SystemdShutdownWatchdog | ||
| rebootTime = "30s"; | ||
| }; | ||
|
|
||
| sleep.extraConfig = '' | ||
| AllowSuspend=no | ||
| AllowHibernation=no | ||
| ''; | ||
| }; | ||
|
|
||
| sleep.extraConfig = '' | ||
| AllowSuspend=no | ||
| AllowHibernation=no | ||
| ''; | ||
| }; | ||
|
|
||
| # use TCP BBR has significantly increased throughput and reduced latency for connections | ||
| boot.kernel.sysctl = { | ||
| "net.core.default_qdisc" = "fq"; | ||
| "net.ipv4.tcp_congestion_control" = "bbr"; | ||
| # use TCP BBR has significantly increased throughput and reduced latency for connections | ||
| boot.kernel.sysctl = { | ||
| "net.core.default_qdisc" = "fq"; | ||
| "net.ipv4.tcp_congestion_control" = "bbr"; | ||
| }; | ||
| } // lib.optionalAttrs (options.environment ? stub-ld) { | ||
| # Don't install the /lib/ld-linux.so.2 and /lib64/ld-linux-x86-64.so.2 | ||
| # stubs. Server users should know what they are doing. | ||
| environment.stub-ld.enable = lib.mkDefault false; | ||
| }; | ||
| } |