Merge pull request 'prometheus' (#10) from prometheus into master

Reviewed-on: https://git.rz.ens.wtf/HackENS/hackens-org-configurations/pulls/10
This commit is contained in:
sinavir 2022-04-25 01:02:21 +02:00
commit 63ee851b2d
5 changed files with 120 additions and 0 deletions

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{ pkgs, lib, config, ... }:
let
cfg = config.services.mqtt2prometheus;
in
{
options.services.mqtt2prometheus = {
enable = lib.mkEnableOption "Enable mqtt2Prometheus";
package = lib.mkOption {
type = lib.types.package;
description = "Which mqtt2prometheus package to use";
};
listenAddress = lib.mkOption {
type = lib.types.str;
default = "127.0.0.1";
description = "listen address for HTTP server used to expose metrics";
};
listenPort = lib.mkOption {
type = lib.types.port;
default = 9641;
description = "HTTP port used to expose metrics";
};
config = lib.mkOption { # à nixifier
type = lib.types.path;
description = "Path to config file";
};
};
config = lib.mkIf cfg.enable {
systemd.services."mqtt2prometheus" = {
enable = true;
description = "MQTT client which exposes metrics for prometheus monitoring software";
after = [ "network.target" ];
serviceConfig = {
ExecStart = "${cfg.package}/bin/mqtt2prometheus -config ${cfg.config} -listen-address ${cfg.listenAddress} -listen-port ${toString cfg.listenPort}";
Restart = "always";
};
wantedBy = [ "multi-user.target" ];
};
};
}

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{ pkgs, ... }:
pkgs.buildGoModule rec {
pname = "mqtt2prometheus";
version = "0.1.6";
src = pkgs.fetchFromGitHub {
owner = "hikhvar";
repo = "mqtt2prometheus";
rev = "v${version}";
sha256 = "0dz5mrwm231g45i8rbmvaza8bm6cr4jg5vc87h41vnm7xsx815g7";
};
vendorSha256 = "1fyzij7cakhd6x2hf3rvvslvvxmfmlp881x5rz2qwm04spa18cp4";
postInstall = ''
mv $out/bin/cmd $out/bin/mqtt2prometheus
'';
}

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mqtt:
# The MQTT broker to connect to
server: tcp://new.hackens.org:1883
# The Topic path to subscribe to. Be aware that you have to specify the wildcard, if you want to follow topics for multiple sensors.
topic_path: kfet/open
# The MQTT QoS level
qos: 0
metric_per_topic_config:
metric_name_regex: "(?P<deviceid>.*)/(?P<metricname>.*)"
cache:
# Timeout. Each received metric will be presented for this time if no update is send via MQTT.
# Set the timeout to -1 to disable the deletion of metrics from the cache. The exporter presents the ingest timestamp
# to prometheus.
timeout: 24h
metrics:
# The name of the metric in prometheus
- prom_name: keft_open
# The name of the metric in a MQTT JSON message
mqtt_name: open
# The prometheus help text for this metric
help: K-Fêt opening state
# The prometheus type for this metric. Valid values are: "gauge" and "counter"
type: gauge

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{ pkgs, lib, config, ... }:
{
imports = [ ../modules/mqtt2prometheus ];
networking.firewall.allowedTCPPorts = [ 9090 ];
services = {
prometheus = {
enable = true;
scrapeConfigs = [
{
job_name = "mqtt_listener";
scrape_interval = "120s";
static_configs = [
{
targets = [
"localhost:9641"
];
}
];
}
];
};
mqtt2prometheus = {
enable = true;
package = pkgs.callPackage (import ./mqtt2prometheus.nix) { };
config = ./config.yaml;
};
};
}

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{ pkgs, ... }:
pkgs.buildGoModule rec {
pname = "mqtt2prometheus";
version = "0.1.6";
src = pkgs.fetchFromGitHub {
owner = "hikhvar";
repo = "mqtt2prometheus";
rev = "v${version}";
sha256 = "0dz5mrwm231g45i8rbmvaza8bm6cr4jg5vc87h41vnm7xsx815g7";
};
vendorSha256 = "1fyzij7cakhd6x2hf3rvvslvvxmfmlp881x5rz2qwm04spa18cp4";
postInstall = ''
mv $out/bin/cmd $out/bin/mqtt2prometheus
'';
}