How to make grafana on nixos available in local network - nginx

Question

My laptop and my nixos-server (hostname=nixos) are both conected to my router (fritz.box). I can access the rooter via ping (ping nixos.fritz.box) and ssh (ssh username#nixos.fritz.box).
What I want is to follow the first part of this guide to set up grafana on nixos. I then want to be able to access grafana from my laptop.
On the server I have configured nixos to run both grafana and a reverse proxy (nginx):
services.grafana = {
enable = true;
domain = "grafana.nixos.fritz.box";
port = 2342;
addr = "127.0.0.1";
};
# nginx reverse proxy for grafana
services.nginx.virtualHosts.${config.services.grafana.domain} = {
locations."/" = {
proxyPass = "http://127.0.0.1:${toString config.services.grafana.port}";
proxyWebsockets = true;
};
};
# Open ports for http and https
networking.firewall.allowedTCPPorts = [ 80 443 ];
system.stateVersion = "21.03";
Unfortunatelly I can't access the grafana webinterface from my laptop.
I tried changing around the value of services.grafana.domain and what I type into my browser (firefox/curl), here is what I got:
services.grafana.domain
argument of curl
output of curl
grafana.nixos.fritz.box
http://grafana.nixos.fritz.box/
curl: (6) Could not resolve host: grafana.nixos.fritz.box
grafana.nixos.fritz.box
https://grafana.nixos.fritz.box/
curl: (6) Could not resolve host: grafana.nixos.fritz.box
grafana.nixos.fritz.box
http://nixos.fritz.box/
curl: (52) Empty reply from server
grafana.nixos.fritz.box
https://nixos.fritz.box/
curl: (35) LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to nixos.fritz.box:443
nixos.fritz.box
http://nixos.fritz.box/
curl: (52) Empty reply from server
nixos.fritz.box
https://nixos.fritz.box/
curl: (35) LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to nixos.fritz.box:443
grafana.localhost
(on the server) http://grafana.localhost
curl: (7) Failed to connect to grafana.localhost port 80: Connection refused
grafana.localhost
(on the server) https://grafana.localhost
curl: (7) Failed to connect to grafana.localhost port 443: Connection refused
Especially the last 2 lines leave me perplexed.
netstat -an | grep LISTEN on the server gives me this:
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:2342 0.0.0.0:* LISTEN
tcp6 0 0 :::22 :::* LISTEN
unix 2 [ ACC ] STREAM LISTENING 1837 /run/systemd/private
unix 2 [ ACC ] STREAM LISTENING 1841 /run/systemd/userdb/io.systemd.DynamicUser
unix 2 [ ACC ] SEQPACKET LISTENING 1853 /run/systemd/coredump
unix 2 [ ACC ] STREAM LISTENING 1862 /run/systemd/journal/stdout
unix 2 [ ACC ] SEQPACKET LISTENING 1868 /run/udev/control
unix 2 [ ACC ] STREAM LISTENING 26958 /var/run/nscd/socket
unix 2 [ ACC ] STREAM LISTENING 1905 /run/systemd/journal/io.systemd.journal
unix 2 [ ACC ] STREAM LISTENING 12193659 /run/user/1001/bus
unix 2 [ ACC ] STREAM LISTENING 12205464 /run/user/1001/systemd/private
unix 2 [ ACC ] STREAM LISTENING 13312 /nix/var/nix/daemon-socket/socket
unix 2 [ ACC ] STREAM LISTENING 18416 /var/run/dhcpcd.sock
unix 2 [ ACC ] STREAM LISTENING 18418 /var/run/dhcpcd.unpriv.sock
unix 2 [ ACC ] STREAM LISTENING 13308 /run/dbus/system_bus_socket
I don't know how to make grafana available in the local network. Can someone help me with that, please?
(I know this question is somewhat similar to this one, but the solution there doesn't help me)

Answer 1

Adding the following line solved my problem (thanks to #Tch):
services.nginx.enable = true;