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{ pkgs, config, ... }: {
# Log shipping via Alloy
services.alloy.enable = true;
environment.etc."alloy/config.alloy".text = ''
loki.source.journal "journal" {
forward_to = [loki.write.default.receiver]
relabel_rules = loki.relabel.journal.rules
max_age = "12h"
}
loki.relabel "journal" {
forward_to = []
rule {
source_labels = ["__journal__systemd_unit"]
target_label = "unit"
}
}
loki.write "default" {
endpoint {
url = "http://lgtm:3100/loki/api/v1/push"
}
}
'';
# Export prometheus data from host for container to access
services.prometheus.exporters.smartctl = {
enable = true;
port = 9633;
listenAddress = "0.0.0.0";
};
services.prometheus.exporters.node = {
enable = true;
port = 9100;
listenAddress = "0.0.0.0";
enabledCollectors = [ "systemd" "diskstats" "filesystem" "meminfo" "cpu" ];
# zfs + hwmon already on by default, no need to list them
};
# # Host config — zpool_influxdb needs real pool access
# services.telegraf = {
# enable = true;
# extraConfig = {
# agent.interval = "30s";
#
# inputs.execd = [{
# command = [ "${pkgs.zpool_influxdb}/bin/zpool_influxdb" "--execd" ];
# signal = "none";
# data_format = "influx";
# }];
#
# outputs.prometheus_client = [{
# listen = ":9273";
# metric_version = 2;
# }];
# };
# };
# Allow ports for prometheus
networking.firewall.allowedTCPPorts = [ 9100 9273 9633 ]; # at least reachable from container subnet
# Secret key for grafana
sops.secrets.grafana-secret-key = { sopsFile = ./resources/secrets/grafana.yaml; key = "secret_key"; }; # Office
# Container
containers.grafana = {
autoStart = true;
privateNetwork = true;
hostBridge = "br-lan0";
localMacAddress = "02:00:00:00:00:06";
# Bind wg0-router secret to container
bindMounts."/run/secrets/grafana-secret_key" = {
hostPath = config.sops.secrets.grafana-secret-key.path;
isReadOnly = true;
};
config = { lib, pkgs, config, ... }: {
# Network
networking.enableIPv6 = false;
networking.interfaces.eth0.useDHCP = true;
networking.firewall.allowedTCPPorts = [ 80 3100 9090 ]; # Caddy (grafana) + loki + prometheus
# Loki
services.loki = {
enable = true;
configuration = {
server = {
http_listen_port = 3100;
http_listen_address = "0.0.0.0"; # explicit, since the host's Alloy needs to reach it to push logs
};
auth_enabled = false;
common = {
path_prefix = "/var/lib/loki";
storage.filesystem = {
chunks_directory = "/var/lib/loki/chunks";
rules_directory = "/var/lib/loki/rules";
};
ring = {
instance_addr = "127.0.0.1";
kvstore.store = "inmemory";
};
replication_factor = 1;
};
schema_config.configs = [{
from = "2024-01-01";
store = "tsdb";
object_store = "filesystem";
schema = "v13";
index = { prefix = "index_"; period = "24h"; };
}];
};
};
# Prometheus
services.prometheus = {
enable = true;
scrapeConfigs = [
{
job_name = "smartctl";
static_configs = [{ targets = [ "poweredge:9633" ]; }];
}
{
job_name = "node";
static_configs = [{ targets = [ "poweredge:9100" ]; }];
}
{
job_name = "zpool";
static_configs = [{ targets = [ "poweredge:9273" ]; }];
}
];
};
# Grafana
# https://wiki.nixos.org/wiki/Grafana
services.grafana = {
enable = true;
settings.server = { http_addr = "0.0.0.0"; http_port = 3000; };
provision = {
enable = true;
# Creates a *mutable* dashboard provider, pulling from /etc/grafana-dashboards.
# With this, you can manually provision dashboards from JSON with `environment.etc` like below.
dashboards.settings.providers = [{
name = "my dashboards";
disableDeletion = true;
options = {
path = "/etc/grafana-dashboards";
foldersFromFilesStructure = true;
};
}];
datasources.settings.datasources = [
{ name = "Prometheus"; type = "prometheus"; url = "http://127.0.0.1:9090"; isDefault = true; }
{ name = "Loki"; type = "loki"; url = "http://127.0.0.1:3100"; }
];
};
};
# Grafana secret key
systemd.services.grafana.serviceConfig = {
LoadCredential = [
"secret_key:/run/secrets/grafana-secret_key"
];
};
services.grafana.settings.security.secret_key = "$__file{/run/credentials/grafana.service/secret_key}";
# Grafana dashboards
environment.etc = let
mkDashDl = id: rev: "https://grafana.com/api/dashboards/${toString id}/revisions/${toString rev}/download";
in {
"grafana-dashboards/node-exporter-full.json".source = pkgs.fetchurl {
url = mkDashDl 1860 45;
sha256 = "sha256-GExrdAnzBtp1Ul13cvcZRbEM6iOtFrXXjEaY6g6lGYY=";
};
"grafana-dashboards/smartctl-exporter.json".source = pkgs.fetchurl {
url = mkDashDl 22604 2;
sha256 = "sha256-ci8WE23fZ+ltEKFoUdNNVXsUIV0jqtas79ia2lYIo88=";
};
"grafana-dashboards/zfs-pool-metrics.json".source = pkgs.fetchurl {
url = mkDashDl 15362 1;
sha256 = "sha256-latX1gwRjdpIalT5kpm9MfDaaXFLZCJ0ZP8CZJo8guI=";
};
};
# Reverse proxy
services.caddy = {
enable = true;
virtualHosts.":80".extraConfig = ''
reverse_proxy localhost:3000
'';
};
system.stateVersion = "26.05";
};
};
}
|
