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gatus: Refactor

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SebastianStork 2025-09-02 22:54:00 +02:00
parent 02296be975
commit 6f53e67250
2 changed files with 86 additions and 77 deletions
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150
modules/system/services/gatus.nix
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@ -1,13 +1,27 @@
{ config, lib, ... }:
let
cfg = config.custom.services.gatus;
tailscaleCfg = config.custom.services.tailscale;
in
{
options.custom.services.gatus =
let
endpointType = lib.types.attrsOf (
options.custom.services.gatus = {
enable = lib.mkEnableOption "";
domain = lib.mkOption {
type = lib.types.nonEmptyStr;
default = "";
};
port = lib.mkOption {
type = lib.types.port;
default = 8080;
};
domainsToMonitor = lib.mkOption {
type = lib.types.listOf lib.types.nonEmptyStr;
default = [ ];
};
endpoints = lib.mkOption {
type = lib.types.attrsOf (
lib.types.submodule (
{ name, ... }:
{ name, config, ... }:
{
options = {
name = lib.mkOption {
@ -15,11 +29,23 @@ in
default = name;
};
group = lib.mkOption {
type = lib.types.nullOr lib.types.nonEmptyStr;
default = null;
};
url = lib.mkOption {
type = lib.types.nonEmptyStr;
default =
let
isTailscale = config.domain |> lib.hasSuffix tailscaleCfg.domain;
in
if isTailscale then "Private" else "Public";
};
protocol = lib.mkOption {
type = lib.types.nonEmptyStr;
default = "https";
};
domain = lib.mkOption {
type = lib.types.nonEmptyStr;
default = "";
};
path = lib.mkOption {
type = lib.types.str;
default = "";
};
interval = lib.mkOption {
@ -37,40 +63,9 @@ in
}
)
);
defaultEndpoints =
let
getSubdomain = domain: domain |> lib.splitString "." |> lib.head;
in
cfg.domainsToMonitor
|> lib.filter (domain: domain != cfg.domain)
|> lib.map (domain: lib.nameValuePair (getSubdomain domain) { url = "https://${domain}"; })
|> lib.listToAttrs;
in
{
enable = lib.mkEnableOption "";
domain = lib.mkOption {
type = lib.types.nonEmptyStr;
default = "";
};
port = lib.mkOption {
type = lib.types.port;
default = 8080;
};
domainsToMonitor = lib.mkOption {
type = lib.types.listOf lib.types.nonEmptyStr;
default = [ ];
};
customEndpoints = lib.mkOption {
type = endpointType;
default = { };
};
finalEndpoints = lib.mkOption {
type = endpointType;
default = defaultEndpoints // cfg.customEndpoints;
readOnly = true;
};
default = { };
};
};
config = lib.mkIf cfg.enable {
meta = {
@ -85,11 +80,26 @@ in
'';
};
custom.services.gatus.customEndpoints."healthchecks.io" = {
group = "Monitoring";
url = "https://hc-ping.com/\${HEALTHCHECKS_PING_KEY}/${config.networking.hostName}-gatus-uptime?create=1";
interval = "2h";
};
custom.services.gatus.endpoints =
let
getSubdomain = domain: domain |> lib.splitString "." |> lib.head;
defaultEndpoints =
cfg.domainsToMonitor
|> lib.filter (domain: domain != cfg.domain)
|> lib.map (domain: lib.nameValuePair (getSubdomain domain) { domain = lib.mkDefault domain; })
|> lib.listToAttrs;
in
{
"healthchecks.io" = {
group = "Monitoring";
protocol = "https";
domain = "hc-ping.com";
path = "/\${HEALTHCHECKS_PING_KEY}/${config.networking.hostName}-gatus-uptime?create=1";
interval = "2h";
};
}
// defaultEndpoints;
services.gatus = {
enable = true;
@ -100,14 +110,11 @@ in
address = "localhost";
port = cfg.port;
};
storage = {
type = "sqlite";
path = "/var/lib/gatus/data.db";
};
connectivity.checker.target = "1.1.1.1:53"; # Cloudflare DNS
alerting.ntfy = {
topic = "uptime";
url = "https://alerts.${config.custom.services.tailscale.domain}";
@ -130,7 +137,6 @@ in
}
];
};
maintenance = {
start = "03:00";
duration = "1h";
@ -139,31 +145,29 @@ in
endpoints =
let
mkEndpoint =
value:
let
isPrivate = value.url |> lib.hasInfix config.custom.services.tailscale.domain;
deducedGroup = if isPrivate then "Private" else "Public";
in
{
inherit (value) name url interval;
group = if value.group != null then value.group else deducedGroup;
alerts = lib.mkIf value.enableAlerts [ { type = "ntfy"; } ];
ssh = lib.mkIf (lib.hasPrefix "ssh" value.url) {
username = "";
password = "";
};
conditions = lib.concatLists [
value.extraConditions
(lib.optional (lib.hasPrefix "http" value.url) "[STATUS] == 200")
(lib.optional (lib.hasPrefix "tcp" value.url) "[CONNECTED] == true")
(lib.optional (lib.hasPrefix "ssh" value.url) "[CONNECTED] == true")
(lib.optional (lib.hasPrefix "icmp" value.url) "[CONNECTED] == true")
];
mkEndpoint = value: {
inherit (value) name group interval;
url = "${value.protocol}://${value.domain}${value.path}";
alerts = lib.mkIf value.enableAlerts [ { type = "ntfy"; } ];
ssh = lib.mkIf (value.protocol == "ssh") {
username = "";
password = "";
};
conditions = lib.concatLists [
value.extraConditions
(lib.optional (lib.elem value.protocol [
"http"
"https"
]) "[STATUS] == 200")
(lib.optional (lib.elem value.protocol [
"tcp"
"ssh"
"icmp"
]) "[CONNECTED] == true")
];
};
in
cfg.finalEndpoints |> lib.attrValues |> lib.map (entry: mkEndpoint entry);
cfg.endpoints |> lib.attrValues |> lib.map (entry: mkEndpoint entry);
};
};
};