nix-config/modules/nixos-modules/server/reverse_proxy.nix

129 lines
3.9 KiB
Nix

{
lib,
config,
...
}: let
dataDir = "/var/lib/acme";
httpPort = 80;
httpsPort = 443;
in {
options.host.reverse_proxy = {
enable = lib.mkEnableOption "turn on the reverse proxy";
hostname = lib.mkOption {
type = lib.types.str;
description = "what host name are we going to be proxying from";
};
forceSSL = lib.mkOption {
type = lib.types.bool;
description = "force connections to use https";
default = config.host.reverse_proxy.enableACME;
};
enableACME = lib.mkOption {
type = lib.types.bool;
description = "auto renew certificates";
default = true;
};
subdomains = lib.mkOption {
type = lib.types.attrsOf (lib.types.submodule ({name, ...}: {
options = {
subdomain = lib.mkOption {
type = lib.types.str;
description = "what is the default subdomain to be used for this application to be used for";
default = name;
};
extraSubdomains = lib.mkOption {
type = lib.types.listOf lib.types.str;
description = "extra domains that should be configured for this domain";
default = [];
};
target = lib.mkOption {
type = lib.types.str;
description = "what url will all traffic to this application be forwarded to";
};
websockets.enable = lib.mkEnableOption "should the default config proxy websockets";
forwardHeaders.enable = lib.mkEnableOption "should the default config contain forward headers";
extraConfig = lib.mkOption {
type = lib.types.lines;
default = "";
description = ''
These lines go to the end of the upstream verbatim.
'';
};
};
}));
};
};
config = lib.mkIf config.host.reverse_proxy.enable (lib.mkMerge [
{
security.acme = lib.mkIf config.host.reverse_proxy.enableACME {
acceptTerms = true;
defaults.email = "jan-leila@protonmail.com";
};
services.nginx = {
enable = true;
virtualHosts = lib.mkMerge (
lib.lists.flatten (
lib.attrsets.mapAttrsToList (
name: value: let
hostConfig = {
forceSSL = config.host.reverse_proxy.forceSSL;
enableACME = config.host.reverse_proxy.enableACME;
locations = {
"/" = {
proxyPass = value.target;
proxyWebsockets = value.websockets.enable;
recommendedProxySettings = value.forwardHeaders.enable;
extraConfig =
value.extraConfig;
};
};
};
in (
[
{
${"${value.subdomain}.${config.host.reverse_proxy.hostname}"} = hostConfig;
}
]
++ builtins.map (subdomain: {${"${subdomain}.${config.host.reverse_proxy.hostname}"} = hostConfig;})
value.extraSubdomains
)
)
config.host.reverse_proxy.subdomains
)
);
};
networking.firewall.allowedTCPPorts = [
httpPort
httpsPort
];
}
(lib.mkIf config.host.impermanence.enable {
# TODO: figure out how to write an assertion for this
# assertions = [
# {
# assertion = security.acme.certs.<name>.directory == dataDir;
# message = "postgres data directory does not match persistence";
# }
# ];
environment.persistence."/persist/system/root" = {
enable = true;
hideMounts = true;
directories = [
{
directory = dataDir;
user = "acme";
group = "acme";
}
];
};
})
]);
}