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