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{ config, lib, pkgs, ... }:
with lib;
let
relabelHosts = [
{ source_labels = ["__address__"];
target_label = "instance";
regex = "(localhost|127\.[0-9]+\.[0-9]+\.[0-9]+)(:[0-9]+)?";
replacement = "surtr";
}
];
in {
config = {
services.prometheus = {
enable = true;
exporters = {
node = {
enable = true;
enabledCollectors = [];
};
unbound = {
enable = true;
controlInterface = "/run/unbound/unbound.ctl";
group = config.services.unbound.group;
};
wireguard = {
enable = true;
wireguardConfig =
let
keys = {
"sif" = ["yioRagUtRvalJLrTtLp8NPiym6a3RpIcqgVfNL1iyRA=" "zIgyMw5wSernKPmMfDZ+fqaYUjbIQUhsXe+7hIZgJho="];
"surtr" = ["YP/sWEUWw51czlGxvgrgyEZ+ssx/3C9siufgd0a8d3g=" "6V2EjwvZ07Pebc9g9TNqIlQu57MvqyUsCeIOzky4Txw="];
"vidhar" = ["IOuHpNQ2ff09HCPKtKY95lDXoRhd8FIBsbB8kaMeUUA=" "jdaF4sx+dhdkTNGxQI6g6JV4XwXgD9QQJQ4f0NYy1gY=" "moESFbO3qUTuoOv6lbzSLrNYSjHkM5hyvAs5XZtQzRA="];
};
in pkgs.writeText "wireguard-config" (concatMapStringsSep "\n" ({ name, value }: ''
[Peer]
# friendly_name = ${name}
PublicKey = ${value}
AllowedIPs = ::/0
'') (concatLists (mapAttrsToList (host: hostKeys: map (nameValuePair host) hostKeys) keys)));
};
blackbox = {
enable = true;
configFile = pkgs.writeText "blackbox-config.yaml" (builtins.toJSON {
modules = {
"dns_soa" = {
prober = "dns";
dns = {
query_name = ".";
query_type = "SOA";
};
};
};
});
};
};
globalConfig = {
evaluation_interval = "1s";
};
remoteWrite = [
{
url = "https://prometheus.vidhar.yggdrasil/api/v1/write";
name = "vidhar";
tls_config = {
ca_file = toString ../../vidhar/prometheus/ca/ca.crt;
cert_file = toString ./tls.crt;
key_file = "/run/credentials/prometheus.service/tls.key";
};
}
];
scrapeConfigs = [
{ job_name = "prometheus";
static_configs = [
{ targets = ["localhost:${toString config.services.prometheus.port}"]; }
];
relabel_configs = relabelHosts;
scrape_interval = "1s";
}
{ job_name = "node";
static_configs = [
{ targets = ["localhost:${toString config.services.prometheus.exporters.node.port}"]; }
];
relabel_configs = relabelHosts;
scrape_interval = "1s";
}
{ job_name = "unbound";
static_configs = [
{ targets = ["localhost:${toString config.services.prometheus.exporters.unbound.port}"]; }
];
relabel_configs = relabelHosts;
scrape_interval = "1s";
}
{ job_name = "wireguard";
static_configs = [
{ targets = ["localhost:${toString config.services.prometheus.exporters.wireguard.port}"]; }
];
relabel_configs = relabelHosts;
scrape_interval = "1s";
}
{ job_name = "nftables";
static_configs = [
{ targets = ["localhost:9901"]; }
];
relabel_configs = relabelHosts;
scrape_interval = "1s";
}
{ job_name = "blackbox";
metrics_path = "/probe";
params = { module = ["dns_soa"]; };
static_configs = [
{ targets = ["127.0.0.53:53" "127.0.0.1:5353"]; }
];
relabel_configs = [
{ source_labels = ["__address__"];
target_label = "__param_target";
}
] ++ relabelHosts ++
[ { source_labels = ["__param_target"];
target_label = "job";
regex = "127\.0\.0\.53:53";
replacement = "systemd-resolved.dns_soa";
}
{ source_labels = ["__param_target"];
target_label = "job";
regex = "127\.0\.0\.1:5353";
replacement = "unbound.dns_soa";
}
{ replacement = "localhost:${toString config.services.prometheus.exporters.blackbox.port}";
target_label = "__address__";
}
];
scrape_interval = "5s";
}
{ job_name = "synapse";
metrics_path = "/_synapse/metrics";
static_configs = [
{ targets = ["localhost:9092"]; }
];
relabel_configs = relabelHosts;
scrape_interval = "5s";
}
];
rules = [
(generators.toYAML {} {
groups = [
];
})
];
ruleFiles = [
./synapse-v2.rules
];
};
users.users.${config.services.prometheus.exporters.unbound.user} = {
description = "Prometheus unbound exporter service user";
isSystemUser = true;
group = config.services.unbound.group;
};
systemd.services."prometheus-unbound-exporter".serviceConfig = {
DynamicUser = false;
};
systemd.services."prometheus-nftables-exporter" = {
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
path = with pkgs; [ nftables ];
serviceConfig = {
Restart = "always";
PrivateTmp = true;
WorkingDirectory = "/tmp";
CapabilityBoundingSet = ["CAP_NET_ADMIN"];
DynamicUser = true;
DeviceAllow = [""];
LockPersonality = true;
MemoryDenyWriteExecute = true;
NoNewPrivileges = true;
PrivateDevices = true;
ProtectClock = true;
ProtectControlGroups = true;
ProtectHome = true;
ProtectHostname = true;
ProtectKernelLogs = true;
ProtectKernelModules = true;
ProtectKernelTunables = true;
ProtectSystem = "strict";
RemoveIPC = true;
RestrictNamespaces = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
SystemCallArchitectures = "native";
UMask = "0077";
AmbientCapabilities = [ "CAP_NET_ADMIN" ];
Type = "simple";
ExecStart = "${pkgs.nftables-prometheus-exporter}/bin/nftables-prometheus-exporter";
Environment = "NFT_HOSTNAME=localhost NFT_PORT=9901";
};
};
sops.secrets."prometheus.key" = {
format = "binary";
sopsFile = ./tls.key;
};
systemd.services.prometheus.serviceConfig.LoadCredential = [
"tls.key:${config.sops.secrets."prometheus.key".path}"
];
};
}
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