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selfhostblocks/patches/prometheusnodecertexporter.nix
ibizaman 16f305b9f4 add alert when certs are close to expiring
2024-12-27 22:54:45 +01:00

219 lines
6.8 KiB
Nix
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index f805920c5b87a..b67f41c4fb12c 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters.nix
@@ -66,6 +66,7 @@ let
"nginx"
"nginxlog"
"node"
+ "node-cert"
"nut"
"nvidia-gpu"
"pgbouncer"
diff --git a/nixos/modules/services/monitoring/prometheus/exporters/node-cert.nix b/nixos/modules/services/monitoring/prometheus/exporters/node-cert.nix
new file mode 100644
index 0000000000000..d8b2004e8e857
--- /dev/null
+++ b/nixos/modules/services/monitoring/prometheus/exporters/node-cert.nix
@@ -0,0 +1,70 @@
+{
+ config,
+ lib,
+ pkgs,
+ ...
+}:
+
+let
+ cfg = config.services.prometheus.exporters.node-cert;
+ inherit (lib) mkOption types concatStringsSep;
+in
+{
+ port = 9141;
+
+ extraOpts = {
+ paths = mkOption {
+ type = types.listOf types.str;
+ description = ''
+ List of paths to search for SSL certificates.
+ '';
+ };
+
+ excludePaths = mkOption {
+ type = types.listOf types.str;
+ description = ''
+ List of paths to exclute from searching for SSL certificates.
+ '';
+ default = [ ];
+ };
+
+ includeGlobs = mkOption {
+ type = types.listOf types.str;
+ description = ''
+ List files matching a pattern to include. Uses Go blob pattern.
+ '';
+ default = [ ];
+ };
+
+ excludeGlobs = mkOption {
+ type = types.listOf types.str;
+ description = ''
+ List files matching a pattern to include. Uses Go blob pattern.
+ '';
+ default = [ ];
+ };
+
+ user = mkOption {
+ type = types.str;
+ description = ''
+ User owning the certs.
+ '';
+ default = "acme";
+ };
+ };
+
+ serviceOpts = {
+ serviceConfig = {
+ User = cfg.user;
+ ExecStart = ''
+ ${lib.getExe pkgs.prometheus-node-cert-exporter} \
+ --listen ${toString cfg.listenAddress}:${toString cfg.port} \
+ --path ${concatStringsSep "," cfg.paths} \
+ --exclude-path "${concatStringsSep "," cfg.excludePaths}" \
+ --include-glob "${concatStringsSep "," cfg.includeGlobs}" \
+ --exclude-glob "${concatStringsSep "," cfg.excludeGlobs}" \
+ ${concatStringsSep " \\\n " cfg.extraFlags}
+ '';
+ };
+ };
+}
diff --git a/nixos/tests/prometheus-exporters.nix b/nixos/tests/prometheus-exporters.nix
index c15a3fd20b021..f59d61e69b92e 100644
--- a/nixos/tests/prometheus-exporters.nix
+++ b/nixos/tests/prometheus-exporters.nix
@@ -1002,6 +1002,49 @@ let
'';
};
+ node-cert = {
+ nodeName = "node_cert";
+ exporterConfig = {
+ enable = true;
+ paths = ["/run/certs"];
+ };
+ exporterTest = ''
+ wait_for_unit("prometheus-node-cert-exporter.service")
+ wait_for_open_port(9141)
+ wait_until_succeeds(
+ "curl -sSf http://localhost:9141/metrics | grep 'ssl_certificate_expiry_seconds{.\\+path=\"/run/certs/node-cert\\.cert\".\\+}'"
+ )
+ '';
+
+ metricProvider = {
+ system.activationScripts.cert.text = ''
+ mkdir -p /run/certs
+ cd /run/certs
+
+ cat >ca.template <<EOF
+ organization = "prometheus-node-cert-exporter"
+ cn = "prometheus-node-cert-exporter"
+ expiration_days = 365
+ ca
+ cert_signing_key
+ crl_signing_key
+ EOF
+
+ ${pkgs.gnutls}/bin/certtool \
+ --generate-privkey \
+ --key-type rsa \
+ --sec-param High \
+ --outfile node-cert.key
+
+ ${pkgs.gnutls}/bin/certtool \
+ --generate-self-signed \
+ --load-privkey node-cert.key \
+ --template ca.template \
+ --outfile node-cert.cert
+ '';
+ };
+ };
+
pgbouncer = {
exporterConfig = {
enable = true;
diff --git a/pkgs/by-name/pr/prometheus-node-cert-exporter/gomod.patch b/pkgs/by-name/pr/prometheus-node-cert-exporter/gomod.patch
new file mode 100644
index 0000000000000..84626a7477628
--- /dev/null
+++ b/pkgs/by-name/pr/prometheus-node-cert-exporter/gomod.patch
@@ -0,0 +1,33 @@
+diff --git a/go.mod b/go.mod
+index 982eef4..bdb53ee 100644
+--- a/go.mod
++++ b/go.mod
+@@ -7,4 +7,15 @@ require (
+ github.com/spf13/pflag v1.0.3
+ )
+
+-go 1.16
++require (
++ github.com/beorn7/perks v1.0.1 // indirect
++ github.com/cespare/xxhash/v2 v2.1.1 // indirect
++ github.com/golang/protobuf v1.4.3 // indirect
++ github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
++ github.com/prometheus/client_model v0.2.0 // indirect
++ github.com/prometheus/procfs v0.6.0 // indirect
++ golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40 // indirect
++ google.golang.org/protobuf v1.26.0-rc.1 // indirect
++)
++
++go 1.18
+diff --git a/go.sum b/go.sum
+index 8bebbb3..75f756a 100644
+--- a/go.sum
++++ b/go.sum
+@@ -39,7 +39,6 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
+ github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+ github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+ github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+ github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
+ github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
diff --git a/pkgs/by-name/pr/prometheus-node-cert-exporter/package.nix b/pkgs/by-name/pr/prometheus-node-cert-exporter/package.nix
new file mode 100644
index 0000000000000..cde041771b296
--- /dev/null
+++ b/pkgs/by-name/pr/prometheus-node-cert-exporter/package.nix
@@ -0,0 +1,33 @@
+{
+ lib,
+ buildGo122Module,
+ fetchFromGitHub,
+ nixosTests,
+}:
+
+buildGo122Module {
+ pname = "node-cert-exporter";
+ version = "1.1.7-unstable-2024-12-26";
+
+ src = fetchFromGitHub {
+ owner = "amimof";
+ repo = "node-cert-exporter";
+ rev = "v1.1.7";
+ sha256 = "sha256-VYJPgNVsfEs/zh/SEdOrFn0FK6S+hNFGDhonj2syutQ=";
+ };
+
+ vendorHash = "sha256-31MHX3YntogvoJmbOytl0rXS6qtdBSBJe8ejKyu6gqM=";
+
+ # Required otherwise we get a few:
+ # vendor/github.com/golang/glog/internal/logsink/logsink.go:129:41:
+ # predeclared any requires go1.18 or later (-lang was set to go1.16; check go.mod)
+ patches = [ ./gomod.patch ];
+
+ meta = with lib; {
+ description = "Prometheus exporter for SSL certificate";
+ mainProgram = "node-cert-exporter";
+ homepage = "https://github.com/amimof/node-cert-exporter";
+ license = licenses.asl20;
+ maintainers = with maintainers; [ ibizaman ];
+ };
+}
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