nixpkgs/nixos/tests/prometheus-exporters.nix

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{ system ? builtins.currentSystem
, config ? {}
, pkgs ? import ../.. { inherit system config; }
}:
with pkgs.lib;
with import ../lib/testing.nix { inherit system pkgs; };
let
escape' = str: replaceChars [''"'' "$" "\n"] [''\\\"'' "\\$" ""] str;
/*
* The attrset `exporterTests` contains one attribute
* for each exporter test. Each of these attributes
* is expected to be an attrset containing:
*
* `exporterConfig`:
* this attribute set contains config for the exporter itself
*
* `exporterTest`
* this attribute set contains test instructions
*
* `metricProvider` (optional)
* this attribute contains additional machine config
*
* Example:
* exporterTests.<exporterName> = {
* exporterConfig = {
* enable = true;
* };
* metricProvider = {
* services.<metricProvider>.enable = true;
* };
* exporterTest = ''
* waitForUnit("prometheus-<exporterName>-exporter.service");
* waitForOpenPort("1234");
* succeed("curl -sSf 'localhost:1234/metrics'");
* '';
* };
*
* # this would generate the following test config:
*
* nodes.<exporterName> = {
* services.prometheus.<exporterName> = {
* enable = true;
* };
* services.<metricProvider>.enable = true;
* };
*
* testScript = ''
* $<exporterName>->start();
* $<exporterName>->waitForUnit("prometheus-<exporterName>-exporter.service");
* $<exporterName>->waitForOpenPort("1234");
* $<exporterName>->succeed("curl -sSf 'localhost:1234/metrics'");
* $<exporterName>->shutdown();
* '';
*/
exporterTests = {
bind = {
exporterConfig = {
enable = true;
};
metricProvider = {
services.bind.enable = true;
services.bind.extraConfig = ''
statistics-channels {
inet 127.0.0.1 port 8053 allow { localhost; };
};
'';
};
exporterTest = ''
waitForUnit("prometheus-bind-exporter.service");
waitForOpenPort(9119);
succeed("curl -sSf http://localhost:9119/metrics" | grep -q 'bind_query_recursions_total 0');
'';
};
blackbox = {
exporterConfig = {
enable = true;
configFile = pkgs.writeText "config.yml" (builtins.toJSON {
modules.icmp_v6 = {
prober = "icmp";
icmp.preferred_ip_protocol = "ip6";
};
});
};
exporterTest = ''
waitForUnit("prometheus-blackbox-exporter.service");
waitForOpenPort(9115);
succeed("curl -sSf 'http://localhost:9115/probe?target=localhost&module=icmp_v6' | grep -q 'probe_success 1'");
'';
};
collectd = {
exporterConfig = {
enable = true;
extraFlags = [ "--web.collectd-push-path /collectd" ];
};
exporterTest =let postData = escape' ''
[{
"values":[23],
"dstypes":["gauge"],
"type":"gauge",
"interval":1000,
"host":"testhost",
"plugin":"testplugin",
"time":$(date +%s)
}]
''; in ''
waitForUnit("prometheus-collectd-exporter.service");
waitForOpenPort(9103);
succeed("curl -sSfH 'Content-Type: application/json' -X POST --data \"${postData}\" localhost:9103/collectd");
succeed("curl -sSf localhost:9103/metrics | grep -q 'collectd_testplugin_gauge{instance=\"testhost\"} 23'");
'';
};
dnsmasq = {
exporterConfig = {
enable = true;
leasesPath = "/var/lib/dnsmasq/dnsmasq.leases";
};
metricProvider = {
services.dnsmasq.enable = true;
};
exporterTest = ''
waitForUnit("prometheus-dnsmasq-exporter.service");
waitForOpenPort(9153);
succeed("curl -sSf http://localhost:9153/metrics | grep -q 'dnsmasq_leases 0'");
'';
};
dovecot = {
exporterConfig = {
enable = true;
scopes = [ "global" ];
socketPath = "/var/run/dovecot2/old-stats";
user = "root"; # <- don't use user root in production
};
metricProvider = {
services.dovecot2.enable = true;
};
exporterTest = ''
waitForUnit("prometheus-dovecot-exporter.service");
waitForOpenPort(9166);
succeed("curl -sSf http://localhost:9166/metrics | grep -q 'dovecot_up{scope=\"global\"} 1'");
'';
};
fritzbox = { # TODO add proper test case
exporterConfig = {
enable = true;
};
exporterTest = ''
waitForUnit("prometheus-fritzbox-exporter.service");
waitForOpenPort(9133);
succeed("curl -sSf http://localhost:9133/metrics | grep -q 'fritzbox_exporter_collect_errors 0'");
'';
};
json = {
exporterConfig = {
enable = true;
url = "http://localhost";
configFile = pkgs.writeText "json-exporter-conf.json" (builtins.toJSON [{
name = "json_test_metric";
path = "$.test";
}]);
};
metricProvider = {
systemd.services.prometheus-json-exporter.after = [ "nginx.service" ];
services.nginx = {
enable = true;
virtualHosts.localhost.locations."/".extraConfig = ''
return 200 "{\"test\":1}";
'';
};
};
exporterTest = ''
waitForUnit("nginx.service");
waitForOpenPort(80);
waitForUnit("prometheus-json-exporter.service");
waitForOpenPort(7979);
succeed("curl -sSf localhost:7979/metrics | grep -q 'json_test_metric 1'");
'';
};
nginx = {
exporterConfig = {
enable = true;
};
metricProvider = {
services.nginx = {
enable = true;
statusPage = true;
virtualHosts."/".extraConfig = "return 204;";
};
};
exporterTest = ''
waitForUnit("nginx.service")
waitForUnit("prometheus-nginx-exporter.service")
waitForOpenPort(9113)
succeed("curl -sSf http://localhost:9113/metrics | grep -q 'nginx_up 1'")
'';
};
node = {
exporterConfig = {
enable = true;
};
exporterTest = ''
waitForUnit("prometheus-node-exporter.service");
waitForOpenPort(9100);
succeed("curl -sSf http://localhost:9100/metrics | grep -q 'node_exporter_build_info{.\\+} 1'");
'';
};
postfix = {
exporterConfig = {
enable = true;
};
metricProvider = {
services.postfix.enable = true;
};
exporterTest = ''
waitForUnit("prometheus-postfix-exporter.service");
waitForOpenPort(9154);
succeed("curl -sSf http://localhost:9154/metrics | grep -q 'postfix_smtpd_connects_total 0'");
'';
};
snmp = {
exporterConfig = {
enable = true;
configuration.default = {
version = 2;
auth.community = "public";
};
};
exporterTest = ''
waitForUnit("prometheus-snmp-exporter.service");
waitForOpenPort(9116);
succeed("curl -sSf localhost:9116/metrics | grep -q 'snmp_request_errors_total 0'");
'';
};
surfboard = {
exporterConfig = {
enable = true;
modemAddress = "localhost";
};
metricProvider = {
systemd.services.prometheus-surfboard-exporter.after = [ "nginx.service" ];
services.nginx = {
enable = true;
virtualHosts.localhost.locations."/cgi-bin/status".extraConfig = ''
return 204;
'';
};
};
exporterTest = ''
waitForUnit("nginx.service");
waitForOpenPort(80);
waitForUnit("prometheus-surfboard-exporter.service");
waitForOpenPort(9239);
succeed("curl -sSf localhost:9239/metrics | grep -q 'surfboard_up 1'");
'';
};
tor = {
exporterConfig = {
enable = true;
};
metricProvider = {
# Note: this does not connect the test environment to the Tor network.
# Client, relay, bridge or exit connectivity are disabled by default.
services.tor.enable = true;
services.tor.controlPort = 9051;
};
exporterTest = ''
waitForUnit("tor.service");
waitForOpenPort(9051);
waitForUnit("prometheus-tor-exporter.service");
waitForOpenPort(9130);
succeed("curl -sSf localhost:9130/metrics | grep -q 'tor_version{.\\+} 1'");
'';
};
varnish = {
exporterConfig = {
enable = true;
instance = "/var/spool/varnish/varnish";
group = "varnish";
};
metricProvider = {
systemd.services.prometheus-varnish-exporter.after = [
"varnish.service"
];
services.varnish = {
enable = true;
config = ''
vcl 4.0;
backend default {
.host = "127.0.0.1";
.port = "80";
}
'';
};
};
exporterTest = ''
waitForUnit("prometheus-varnish-exporter.service");
waitForOpenPort(9131);
succeed("curl -sSf http://localhost:9131/metrics | grep -q 'varnish_up 1'");
'';
};
wireguard = let snakeoil = import ./wireguard/snakeoil-keys.nix; in {
exporterConfig.enable = true;
metricProvider = {
networking.wireguard.interfaces.wg0 = {
ips = [ "10.23.42.1/32" "fc00::1/128" ];
listenPort = 23542;
inherit (snakeoil.peer0) privateKey;
peers = singleton {
allowedIPs = [ "10.23.42.2/32" "fc00::2/128" ];
inherit (snakeoil.peer1) publicKey;
};
};
systemd.services.prometheus-wireguard-exporter.after = [ "wireguard-wg0.service" ];
};
exporterTest = ''
waitForUnit("prometheus-wireguard-exporter.service");
waitForOpenPort(9586);
waitUntilSucceeds("curl -sSf http://localhost:9586/metrics | grep '${snakeoil.peer1.publicKey}'");
'';
};
};
in
mapAttrs (exporter: testConfig: (makeTest {
name = "prometheus-${exporter}-exporter";
nodes.${exporter} = mkMerge [{
services.prometheus.exporters.${exporter} = testConfig.exporterConfig;
} testConfig.metricProvider or {}];
testScript = ''
${"$"+exporter}->start();
${concatStringsSep " " (map (line: ''
${"$"+exporter}->${line};
'') (splitString "\n" (removeSuffix "\n" testConfig.exporterTest)))}
${"$"+exporter}->shutdown();
'';
meta = with maintainers; {
maintainers = [ willibutz ];
};
})) exporterTests