114 lines
3 KiB
Nix
114 lines
3 KiB
Nix
{ config, lib, pkgs, ...}:
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with lib;
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let
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cfg = config.services.varnish;
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commandLine = "-f ${pkgs.writeText "default.vcl" cfg.config}" +
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optionalString (cfg.extraModules != []) " -p vmod_path='${makeSearchPathOutput "lib" "lib/varnish/vmods" ([cfg.package] ++ cfg.extraModules)}' -r vmod_path";
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in
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{
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options = {
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services.varnish = {
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enable = mkEnableOption "Varnish Server";
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enableConfigCheck = mkEnableOption "checking the config during build time" // { default = true; };
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package = mkOption {
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type = types.package;
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default = pkgs.varnish;
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defaultText = literalExpression "pkgs.varnish";
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description = ''
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The package to use
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'';
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};
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http_address = mkOption {
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type = types.str;
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default = "*:6081";
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description = "
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HTTP listen address and port.
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";
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};
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config = mkOption {
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type = types.lines;
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description = "
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Verbatim default.vcl configuration.
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";
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};
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stateDir = mkOption {
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type = types.path;
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default = "/var/spool/varnish/${config.networking.hostName}";
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description = "
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Directory holding all state for Varnish to run.
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";
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};
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extraModules = mkOption {
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type = types.listOf types.package;
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default = [];
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example = literalExpression "[ pkgs.varnishPackages.geoip ]";
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description = "
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Varnish modules (except 'std').
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";
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};
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extraCommandLine = mkOption {
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type = types.str;
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default = "";
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example = "-s malloc,256M";
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description = "
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Command line switches for varnishd (run 'varnishd -?' to get list of options)
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";
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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.varnish = {
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description = "Varnish";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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preStart = ''
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mkdir -p ${cfg.stateDir}
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chown -R varnish:varnish ${cfg.stateDir}
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'';
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postStop = ''
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rm -rf ${cfg.stateDir}
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'';
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serviceConfig = {
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Type = "simple";
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PermissionsStartOnly = true;
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ExecStart = "${cfg.package}/sbin/varnishd -a ${cfg.http_address} -n ${cfg.stateDir} -F ${cfg.extraCommandLine} ${commandLine}";
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Restart = "always";
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RestartSec = "5s";
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User = "varnish";
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Group = "varnish";
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AmbientCapabilities = "cap_net_bind_service";
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NoNewPrivileges = true;
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LimitNOFILE = 131072;
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};
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};
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environment.systemPackages = [ cfg.package ];
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# check .vcl syntax at compile time (e.g. before nixops deployment)
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system.extraDependencies = mkIf cfg.enableConfigCheck [
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(pkgs.runCommand "check-varnish-syntax" {} ''
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${cfg.package}/bin/varnishd -C ${commandLine} 2> $out || (cat $out; exit 1)
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'')
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];
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users.users.varnish = {
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group = "varnish";
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uid = config.ids.uids.varnish;
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};
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users.groups.varnish.gid = config.ids.uids.varnish;
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};
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}
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