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modules/prometheus: add blackbox exporter

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This commit is contained in:
xinyangli 2024-07-31 15:37:42 +08:00
parent 5fe7ff0434
commit daeeb211a2
Signed by: xin
SSH key fingerprint: SHA256:qZ/tzd8lYRtUFSrfBDBMcUqV4GHKxqeqRA3huItgvbk
6 changed files with 105 additions and 14 deletions
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83
modules/nixos/prometheus/blackbox.nix Normal file
View file

@ -0,0 +1,83 @@
{ config, lib, pkgs, ... }:
let
cfg = config.custom.prometheus;
in
{
config = lib.mkIf (cfg.enable && cfg.exporters.blackbox.enable) {
services.prometheus.exporters.blackbox = {
enable = true;
listenAddress = "127.0.0.1";
configFile = pkgs.writeText "blackbox.config.yaml" (
lib.generators.toYAML {} {
modules = {
tcp4_connect = {
prober = "tcp";
tcp = {
ip_protocol_fallback = false;
preferred_ip_protocol = "ip4";
tls = false;
};
timeout = "15s";
};
};
}
);
};
services.prometheus.scrapeConfigs = [
{
job_name = "blackbox";
scrape_interval = "1m";
metrics_path = "/probe";
params = {
module = [ "tcp4_connect" ];
};
static_configs = [
{
targets = [
"tok-00.namely.icu:8080"
"la-00.video.namely.icu:8080"
"auth.xinyang.life:443"
"home.xinyang.life:8000"
];
}
];
relabel_configs = [
{
source_labels = [ "__address__" ];
target_label = "__param_target";
}
{
source_labels = [ "__param_target" ];
target_label = "instance";
}
{
target_label = "__address__";
replacement = "127.0.0.1:${toString config.services.prometheus.exporters.blackbox.port}";
}
];
}
{
job_name = "blackbox_exporter";
static_configs = [
{ targets = [ "127.0.0.1:${toString config.services.prometheus.exporters.blackbox.port}" ]; }
];
}
];
custom.prometheus.ruleModules = [
{
name = "probe_alerts";
rules = [
{
alert = "HighProbeLatency";
expr = "probe_duration_seconds > 0.5";
for = "2m";
labels = { severity = "warning"; };
annotations = { summary = "High request latency on {{ $labels.instance }}"; description = "95th percentile of request latency is above 0.5 seconds for the last 2 minutes."; };
}
];
}
];
};
}

10
modules/nixos/prometheus/caddy.nix
View file

@ -3,7 +3,7 @@ let
cfg = config.custom.prometheus;
in
{
config = lib.mkIf cfg.enable {
config = lib.mkIf (cfg.enable && cfg.exporters.caddy.enable) {
services.caddy.globalConfig = lib.mkIf cfg.exporters.caddy.enable ''
servers {
metrics
@ -11,16 +11,16 @@ in
'';
services.prometheus.scrapeConfigs = [
(lib.mkIf cfg.exporters.caddy.enable {
{
job_name = "caddy";
static_configs = [
{ targets = [ "127.0.0.1:2019" ]; }
];
})
}
];
custom.prometheus.ruleModules = [
(lib.mkIf cfg.exporters.caddy.enable {
{
name = "caddy_alerts";
rules = [
{
@ -38,7 +38,7 @@ in
annotations = { summary = "High request latency on {{ $labels.instance }}"; description = "95th percentile of request latency is above 0.5 seconds for the last 2 minutes."; };
}
];
})
}
];
};

10
modules/nixos/prometheus/default.nix
View file

@ -4,7 +4,6 @@ with lib;
let
cfg = config.custom.prometheus;
exporterCfg = config.custom.prometheus.exporters;
mkExporterOption = enableOption: (mkOption {
type = types.bool;
default = enableOption;
@ -26,6 +25,7 @@ let
in
{
imports = [
./blackbox.nix
./caddy.nix
./gotosocial.nix
./ntfy-sh.nix
@ -43,6 +43,7 @@ in
};
restic.enable = mkExporterOption config.services.restic.server.enable;
blackbox.enable = mkExporterOption false;
caddy.enable = mkExporterOption config.services.caddy.enable;
gotosocial.enable = mkExporterOption config.services.gotosocial.enable;
ntfy-sh.enable = mkExporterOption config.services.gotosocial.enable;
@ -187,6 +188,13 @@ in
labels = { severity = "critical"; };
annotations = { summary = "Outbound network traffic exceed 300GB for last 30 day"; };
}
{
alert = "JobDown";
expr = "up == 0";
for = "1m";
labels = { severity = "critical"; };
annotations = { summary = "Job {{ $labels.job }} down for 1m."; };
}
];
}
];

4
modules/nixos/prometheus/gotosocial.nix
View file

@ -3,8 +3,8 @@ let
cfg = config.custom.prometheus;
in
{
config = lib.mkIf cfg.exporters.gotosocial.enable {
services.gotosocial.settings = lib.mkIf cfg.exporters.gotosocial.enable {
config = lib.mkIf (cfg.enable && cfg.exporters.gotosocial.enable) {
services.gotosocial.settings = {
metrics-enabled = true;
};
services.prometheus.scrapeConfigs = [

6
modules/nixos/prometheus/ntfy-sh.nix
View file

@ -3,15 +3,15 @@ let
cfg = config.custom.prometheus;
in
{
config = lib.mkIf cfg.enable {
config = lib.mkIf (cfg.enable && cfg.exporters.ntfy-sh.enable) {
services.ntfy-sh.settings.enable-metrics = true;
services.prometheus.scrapeConfigs = [
(lib.mkIf cfg.exporters.ntfy-sh.enable {
{
job_name = "ntfy-sh";
static_configs = [
{ targets = [ "ntfy.xinyang.life" ]; }
];
})
}
];
};
}

6
modules/nixos/prometheus/restic.nix
View file

@ -3,7 +3,7 @@ let
cfg = config.custom.prometheus;
in
{
config = lib.mkIf cfg.enable {
config = lib.mkIf (cfg.enable && cfg.exporters.restic.enable) {
services.restic.server.prometheus = true;
services.prometheus.scrapeConfigs = [
@ -16,7 +16,7 @@ in
];
custom.prometheus.ruleModules = [
(lib.mkIf cfg.exporters.restic.enable {
{
name = "restic_alerts";
rules = [
{
@ -34,7 +34,7 @@ in
annotations = { summary = "Restic {{ $labels.client_hostname }} / {{ $labels.client_username }} backup is outdated"; description = "Restic backup is outdated\\n VALUE = {{ $value }}\\n LABELS = {{ $labels }}"; };
}
];
})
}
];
};