162 lines
5.4 KiB
Nix
162 lines
5.4 KiB
Nix
{ config, lib, ... }:
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let
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cfg = config.services.proxy;
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canonicalize = builtins.replaceStrings [ "*" "." ":" "[" "]" ] [ "all" "_" "_" "" "" ];
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in
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{
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options.services.proxy = {
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enable = lib.mkOption {
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default = false;
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description = "whether to enable proxy";
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type = lib.types.bool;
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};
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proxyHosts = lib.mkOption {
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type = lib.types.listOf (lib.types.submodule {
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options = {
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hostNames = lib.mkOption {
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type = with lib.types; listOf str;
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default = [ ];
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description = ''
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Proxy these hostNames.
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'';
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};
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proxyTo = lib.mkOption {
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type = lib.types.submodule {
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options = {
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host = lib.mkOption {
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type = with lib.types; nullOr string;
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default = null;
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description = ''
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Host to forward traffic to.
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Any hostname may only be used once
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'';
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};
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httpPort = lib.mkOption {
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type = lib.types.port;
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default = 80;
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description = ''
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Port to forward http to.
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'';
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};
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httpsPort = lib.mkOption {
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type = lib.types.port;
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default = 443;
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description = ''
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Port to forward http to.
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'';
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};
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proxyHttpPort = lib.mkOption {
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type = lib.types.port;
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default = 8080;
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description = ''
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Port to forward http to when using the proxy protocol.
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'';
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};
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proxyHttpsPort = lib.mkOption {
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type = lib.types.port;
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default = 8443;
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description = ''
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Port to forward http to when using the proxy protocol.
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'';
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};
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};
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};
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description = ''
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{ host = /* ip or fqdn */; httpPort = 80; httpsPort = 443; } to proxy to
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'';
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default = { };
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};
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proxyProtocol = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = "Whether to use proxy protocol to connect to the server.";
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};
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matchArg = lib.mkOption {
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type = lib.types.str;
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default = "";
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description = "Optional argument to HAProxy `req.ssl_sni -i`";
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};
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};
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});
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default = [ ];
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example = [{
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hostNames = [ "test.hq.c3d2.de" "test.c3d2.de" ];
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proxyTo = {
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host = "172.22.99.99";
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httpPort = 80;
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httpsPort = 443;
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};
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}];
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};
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};
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config = lib.mkIf cfg.enable {
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assertions = [{
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assertion = let
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proxyTo = lib.forEach cfg.proxyHosts (x: x.proxyTo.host);
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uniqueProxyTo = lib.unique proxyTo;
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in
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(builtins.length proxyTo) == (builtins.length uniqueProxyTo);
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message = "proxyTo must be unique across the list of proxyHosts. Insert your domain you want to proxy to the list of hostNames instead.";
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}];
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services.haproxy = {
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enable = true;
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config = ''
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defaults
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timeout client 30000
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timeout connect 5000
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timeout check 5000
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timeout server 30000
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frontend http-in
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bind :::80 v4v6
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option http-keep-alive
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default_backend proxy-backend-http
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backend proxy-backend-http
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mode http
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option http-server-close
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option forwardfor
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http-request set-header X-Forwarded-Proto http
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http-request set-header X-Forwarded-Port 80
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${lib.concatMapStrings ({ proxyTo, proxyProtocol, hostNames, matchArg }:
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lib.optionalString (hostNames != [ ] && proxyTo.host != null) (
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lib.concatMapStrings (hostname: ''
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use-server ${canonicalize hostname}-http if { req.hdr(host) -i ${matchArg} ${hostname} }
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server ${canonicalize hostname}-http ${proxyTo.host}:${toString proxyTo.httpPort} check ${lib.optionalString proxyProtocol "backup"}
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${lib.optionalString proxyProtocol "server ${canonicalize hostname}-proxy-http ${proxyTo.host}:${toString proxyTo.proxyHttpPort} check send-proxy-v2"}
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'') hostNames
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)
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) cfg.proxyHosts
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}
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frontend https-in
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bind :::443 v4v6
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tcp-request inspect-delay 5s
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tcp-request content accept if { req.ssl_hello_type 1 }
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${lib.concatMapStrings ({ proxyTo, hostNames, matchArg, ... }:
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lib.concatMapStrings (hostname: ''
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use_backend ${canonicalize proxyTo.host}-https if { req.ssl_sni -i ${matchArg} ${hostname} }
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'') hostNames
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) cfg.proxyHosts}
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${lib.concatMapStrings ({ proxyTo, proxyProtocol, ... }: ''
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backend ${canonicalize proxyTo.host}-https
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server ${canonicalize proxyTo.host}-https ${proxyTo.host}:${toString proxyTo.httpsPort} check ${lib.optionalString proxyProtocol "backup"}
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${lib.optionalString proxyProtocol "server ${canonicalize proxyTo.host}-proxy-https ${proxyTo.host}:${toString proxyTo.proxyHttpsPort} check send-proxy-v2"}
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'') cfg.proxyHosts}
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'';
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};
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};
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}
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