inputs: { config, pkgs, lib, ... } :
let
# add nginx reverse proxy and ACME web certificate
add_nginx = true;
nginx_ports = [ 80 443 ];
lemmy = {
upstreamName = "lemmy";
dataDir = "/var/lib/lemmy";
ip = "127.0.0.1";
port = 1234;
domain = "lemmy.gra.phi.te";
};
lemmy-ui = {
upstreamName = "lemmy-ui";
ip = "127.0.0.1";
port = 8536;
};
pict-rs = {
ip = "127.0.0.1";
port = 8080;
};
acmeDomain = lemmy.domain;
nginxVhost = lemmy.domain;
in {
security.acme = lib.mkIf add_nginx {
acceptTerms = true;
defaults = {
email = "ultra980@proton.me";
dnsProvider = "cloudflare";
credentialsFile = ./lemmy_credentials.txt;
};
certs."${acmeDomain}" = {
domain = "${acmeDomain}";
};
};
networking.firewall.allowedTCPPorts = lib.mkIf add_nginx nginx_ports;
# is needed because of certificate file permissions
users.users.nginx.extraGroups = lib.mkIf add_nginx ["acme"];
services.nginx = lib.mkIf add_nginx {
upstreams."${lemmy.upstreamName}".servers."${lemmy.ip}:${builtins.toString lemmy.port}" = {};
upstreams."${lemmy-ui.upstreamName}".servers."${lemmy-ui.ip}:${builtins.toString lemmy-ui.port}" = {};
virtualHosts."${nginxVhost}" = {
useACMEHost = "${acmeDomain}";
# inherit from config.security.acme.acmeRoot;
acmeRoot = null;
# add redirects from http to https
forceSSL = true;
# this whole block was lifted from https://github.com/LemmyNet/lemmy/blob/ef1aa18fd20cc03d492a81cb70cc75cf3281649f/docker/nginx.conf#L21 lines 21-32
extraConfig = ''
# disables emitting nginx version on error pages and in the “Server” response header field
server_tokens off;
gzip on;
gzip_types text/css application/javascript image/svg+xml;
gzip_vary on;
# Upload limit, relevant for pictrs
client_max_body_size 20M;
add_header X-Frame-Options SAMEORIGIN;
add_header X-Content-Type-Options nosniff;
add_header X-XSS-Protection "1; mode=block";
'';
locations = {
"/" = {
# we do not use the nixos "locations.<name>.proxyPass" option because the nginx config needs to do something fancy.
# again, lifted wholesale from https://github.com/LemmyNet/lemmy/blob/ef1aa18fd20cc03d492a81cb70cc75cf3281649f/docker/nginx.conf#L36 lines 36-55
extraConfig = ''
# distinguish between ui requests and backend
# don't change lemmy-ui or lemmy here, they refer to the upstream definitions on top
set $proxpass "http://${lemmy-ui.upstreamName}";
if ($http_accept = "application/activity+json") {
set $proxpass "http://${lemmy.upstreamName}";
}
if ($http_accept = "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"") {
set $proxpass "http://${lemmy.upstreamName}";
}
if ($request_method = POST) {
set $proxpass "http://${lemmy.upstreamName}";
}
proxy_pass $proxpass;
# Cuts off the trailing slash on URLs to make them valid
rewrite ^(.+)/+$ $1 permanent;
# Send actual client IP upstream
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
'';
};
# again, lifted wholesale from https://github.com/LemmyNet/lemmy/blob/ef1aa18fd20cc03d492a81cb70cc75cf3281649f/docker/nginx.conf#L60 lines 60-69 (nice!)
"~ ^/(api|pictrs|feeds|nodeinfo|.well-known)" = {
proxyPass = "http://${lemmy.upstreamName}";
extraConfig = ''
# proxy common stuff
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
## Send actual client IP upstream
#proxy_set_header X-Real-IP $remote_addr;
#proxy_set_header Host $host;
#proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
'';
};
};
};
};
systemd.services.lemmy-ui = {
environment = {
LEMMY_UI_HOST = lib.mkForce "${lemmy-ui.ip}:${toString lemmy-ui.port}";
LEMMY_UI_LEMMY_INTERNAL_HOST = lib.mkForce "${lemmy.ip}:${toString lemmy.port}";
LEMMY_UI_LEMMY_EXTERNAL_HOST = lib.mkForce lemmy.domain ;
LEMMY_UI_HTTPS="true";
};
};
services.pict-rs = {
enable = true;
port = pict-rs.port;
dataDir = "${dataDir}/pict-rs";
address = pict-rs.ip;
};
systemd.services.lemmy = {
requires = ["postgresql.service"];
after = ["postgresql.service"];
environment = {
LEMMY_DATABASE_URL = lib.mkForce "postgresql://lemmy@127.0.0.1:${toString config.services.postgresql.port}/lemmy";
};
};
services.lemmy = {
enable = true;
ui.port = lemmy-ui.port;
database.createLocally = true;
settings = {
# TODO: Enable this much later when you tested everything.
# N.B. you can't change your domain name after enabling this.
federation.enabled = false;
# settings related to the postgresql database
database = {
user = "lemmy";
password = "secretlemmypassword";
host = "127.0.0.1";
port = ${config.services.postgresql.port};
database = "lemmy";
pool_size = 5;
};
/*
# Pictrs image server configuration.
pictrs = {
# Address where pictrs is available (for image hosting)
url = "http://${pict-rs.ip}:${toString pict-rs.port}/";
# TODO: Set a custom pictrs API key. ( Required for deleting images )
api_key = "";
};
*/
# TODO: Email sending configuration. All options except login/password are mandatory
email = {
# Hostname and port of the smtp server
smtp_server = "";
# Login name for smtp server
smtp_login = "";
# Password to login to the smtp server
smtp_password = "";
# Address to send emails from, eg "noreply@your-instance.com";
smtp_from_address = "noreply@${lemmy.domain}";
# Whether or not smtp connections should use tls. Can be none, tls, or starttls
tls_type = "none";
};
# TODO: Parameters for automatic configuration of new instance (only used at first start)
setup = {
# Username for the admin user
admin_username = "superawesomeadmin";
# Password for the admin user. It must be at least 10 characters.
admin_password = "";
# Name of the site (can be changed later)
site_name = "Lemmy at ${lemmy.domain}";
# Email for the admin user (optional, can be omitted and set later through the website)
admin_email = "admin@${lemmy.domain}";
};
# the domain name of your instance (mandatory)
hostname = lemmy.domain;
# Address where lemmy should listen for incoming requests
bind = lemmy.ip;
# Port where lemmy should listen for incoming requests
port = lemmy.port;
# Whether the site is available over TLS. Needs to be true for federation to work.
tls_enabled = true;
};
};
# needed for now
nixpkgs.config.permittedInsecurePackages = [
"nodejs-14.21.3"
"openssl-1.1.1t"
];
system.activationScripts."make_sure_lemmy_user_owns_files" = ''
uid='${config.users.users.lemmy.uid}';
gid='${config.users.groups.lemmy.gid}';
dir='${lemmy.dataDir}'
mkdir -p "''${dir}"
if [[ "$(${pkgs.toybox}/bin/stat "''${dir}" -c '%u:%g' | tee /dev/stderr )" != "''${uid}:''${gid}" ]]; then
chown -R "''${uid}:''${gid}" "''${dir}"
fi
'';
};
};
}