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flake.nix: Split nixos module to a separate file (#18)
- Split out nix/nixos-module.nix. This way it can theoretically be imported without using flakes, since some people prefer to do things that way. - Use a nixpkgs overlay to add tailscale-manager to pkgs, so it shows up when vm-text.nix imports the module - Move nixosModules to the system-independent outputs section where it belongs - Remove last references to `packageName` since we were not using it consistently Resources: https://vtimofeenko.com/posts/practical-nix-flake-anatomy-a-guided-tour-of-flake.nix/
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| { config, lib, pkgs, ... }: | ||
|
|
||
| with lib; | ||
| let | ||
| cfg = config.services.tailscale-manager; | ||
| configFile = pkgs.writeTextFile { | ||
| name = "tailscale-manager.json"; | ||
| text = generators.toJSON {} { | ||
| routes = cfg.routes; | ||
| hostRoutes = cfg.hostRoutes; | ||
| extraArgs = cfg.extraArgs; | ||
| awsManagedPrefixLists = cfg.awsManagedPrefixLists; | ||
| }; | ||
| }; | ||
| in { | ||
| options.services.tailscale-manager = { | ||
| enable = mkEnableOption "tailscale-manager"; | ||
| package = mkPackageOption pkgs "tailscale-manager" {}; | ||
| interval = mkOption { | ||
| type = types.int; | ||
| default = 300; | ||
| description = "Interval between runs, in seconds"; | ||
| }; | ||
| routes = mkOption { | ||
| type = types.listOf types.str; | ||
| default = []; | ||
| description = "List of CIDR prefix routes to advertise"; | ||
| }; | ||
| hostRoutes = mkOption { | ||
| type = types.listOf types.str; | ||
| default = []; | ||
| description = "List of hostnames and IP addresses to add as /32 routes"; | ||
| }; | ||
| awsManagedPrefixLists = mkOption { | ||
| type = types.listOf types.str; | ||
| default = []; | ||
| description = "AWS prefix list IDs for route discovery"; | ||
| }; | ||
| extraArgs = mkOption { | ||
| type = types.listOf types.str; | ||
| default = []; | ||
| description = "Extra arguments for `tailscale set`"; | ||
| }; | ||
| dryRun = mkOption { | ||
| type = types.bool; | ||
| default = false; | ||
| description = "Enable dry-run mode, don't actually apply changes."; | ||
| }; | ||
| maxShrinkRatio = mkOption { | ||
| type = types.float; | ||
| default = 0.5; | ||
| description = "How much route shrinkage is allowed between subsequent runs (between 0 and 1)"; | ||
| }; | ||
| socketPath = mkOption { | ||
| type = types.path; | ||
| default = "/var/run/tailscale/tailscaled.sock"; | ||
| description = "Path to the tailscaled socket"; | ||
| }; | ||
| }; | ||
| config = mkIf cfg.enable { | ||
| systemd.services.tailscale-manager = { | ||
| after = ["tailscaled.service"]; | ||
| wants = ["tailscaled.service"]; | ||
| wantedBy = ["multi-user.target"]; | ||
| # Never give up on trying to restart | ||
| startLimitIntervalSec = 0; | ||
| serviceConfig = { | ||
| Type = "exec"; | ||
| Restart = "always"; | ||
| # Restart at increasing intervals to avoid things like EC2 | ||
| # metadata service rate limits | ||
| RestartSec = 1; | ||
| RestartSteps = 30; | ||
| RestartMaxDelaySec = 60; | ||
| ExecStart = lib.escapeShellArgs ( | ||
| [ "${cfg.package}/bin/tailscale-manager" configFile | ||
| "--tailscale=${config.services.tailscale.package}/bin/tailscale" | ||
| "--socket=${cfg.socketPath}" | ||
| "--interval=${toString cfg.interval}" | ||
| "--max-shrink-ratio=${toString cfg.maxShrinkRatio}" | ||
| ] ++ lib.optional cfg.dryRun "--dryrun" | ||
| ); | ||
| }; | ||
| }; | ||
| }; | ||
| } |
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