140 lines
4 KiB
Nix
140 lines
4 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.caddy;
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configFile = pkgs.writeText "Caddyfile" cfg.config;
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tlsConfig = {
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apps.tls.automation.policies = [{
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issuer = {
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inherit (cfg) ca email;
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module = "acme";
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};
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}];
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};
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adaptedConfig = pkgs.runCommand "caddy-config-adapted.json" { } ''
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${cfg.package}/bin/caddy adapt \
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--config ${configFile} --adapter ${cfg.adapter} > $out
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'';
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tlsJSON = pkgs.writeText "tls.json" (builtins.toJSON tlsConfig);
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configJSON = pkgs.runCommand "caddy-config.json" { } ''
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${pkgs.jq}/bin/jq -s '.[0] * .[1]' ${adaptedConfig} ${tlsJSON} > $out
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'';
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in {
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options.services.caddy = {
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enable = mkEnableOption "Caddy web server";
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config = mkOption {
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default = "";
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example = ''
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example.com {
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encode gzip
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log
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root /srv/http
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}
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'';
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type = types.lines;
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description = ''
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Verbatim Caddyfile to use.
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Caddy v2 supports multiple config formats via adapters (see <option>services.caddy.adapter</option>).
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'';
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};
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adapter = mkOption {
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default = "caddyfile";
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example = "nginx";
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type = types.str;
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description = ''
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Name of the config adapter to use.
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See https://caddyserver.com/docs/config-adapters for the full list.
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'';
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};
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ca = mkOption {
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default = "https://acme-v02.api.letsencrypt.org/directory";
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example = "https://acme-staging-v02.api.letsencrypt.org/directory";
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type = types.str;
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description = "Certificate authority ACME server. The default (Let's Encrypt production server) should be fine for most people.";
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};
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email = mkOption {
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default = "";
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type = types.str;
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description = "Email address (for Let's Encrypt certificate)";
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};
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agree = mkOption {
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default = false;
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type = types.bool;
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description = "Agree to Let's Encrypt Subscriber Agreement";
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};
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dataDir = mkOption {
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default = "/var/lib/caddy";
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type = types.path;
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description = ''
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The data directory, for storing certificates. Before 17.09, this
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would create a .caddy directory. With 17.09 the contents of the
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.caddy directory are in the specified data directory instead.
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Caddy v2 replaced CADDYPATH with XDG directories.
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See https://caddyserver.com/docs/conventions#file-locations.
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'';
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};
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package = mkOption {
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default = pkgs.caddy;
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defaultText = "pkgs.caddy";
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example = "pkgs.caddy";
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type = types.package;
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description = ''
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Caddy package to use.
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'';
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};
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};
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config = mkIf cfg.enable {
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systemd.services.caddy = {
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description = "Caddy web server";
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# upstream unit: https://github.com/caddyserver/dist/blob/master/init/caddy.service
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after = [ "network-online.target" ];
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wants = [ "network-online.target" ]; # systemd-networkd-wait-online.service
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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ExecStart = "${cfg.package}/bin/caddy run --config ${configJSON}";
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ExecReload = "${cfg.package}/bin/caddy reload --config ${configJSON}";
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Type = "simple";
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User = "caddy";
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Group = "caddy";
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Restart = "on-abnormal";
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StartLimitIntervalSec = 14400;
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StartLimitBurst = 10;
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AmbientCapabilities = "cap_net_bind_service";
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CapabilityBoundingSet = "cap_net_bind_service";
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NoNewPrivileges = true;
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LimitNPROC = 512;
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LimitNOFILE = 1048576;
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PrivateTmp = true;
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PrivateDevices = true;
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ProtectHome = true;
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ProtectSystem = "full";
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ReadWriteDirectories = cfg.dataDir;
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KillMode = "mixed";
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KillSignal = "SIGQUIT";
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TimeoutStopSec = "5s";
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};
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};
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users.users.caddy = {
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group = "caddy";
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uid = config.ids.uids.caddy;
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home = cfg.dataDir;
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createHome = true;
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};
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users.groups.caddy.gid = config.ids.uids.caddy;
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};
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}
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