Scaffold project and generate alertmanager dashboard

.gitignore

@@ -23,3 +23,33 @@ go.work.sum
 
 # env file
 .env
+### Go template
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+go.work.sum
+
+# env file
+.env
+
+
+vendor/
+vendor_jsonnet/

dashboards/alertmanager.jsonnet

@@ -0,0 +1,25 @@
+local alertmanager = (import 'github.com/prometheus/alertmanager/doc/alertmanager-mixin/dashboards/overview.libsonnet');
+local defaultConfig = (import 'github.com/prometheus/alertmanager/doc/alertmanager-mixin/config.libsonnet');
+local mixin = alertmanager {
+  _config+:: defaultConfig._config {
+    alertmanagerClusterLabels: 'namespace,job',
+    alertmanagerNameLabels: 'pod',
+    alertmanagerCriticalIntegrationsRegEx: 'slack|pagerduty|email|webhook',
+    alertmanagerSelector: 'job="alertmanager"',
+  },
+};
+
+{
+  apiVersion: 'v1',
+  kind: 'ConfigMap',
+  metadata: {
+    name: 'grafana-dashboard-observatorium-alertmanager-overview',
+    labels+: { grafana_dashboard: 'true' },
+    annotations+: {
+      'grafana-folder': '/grafana-dashboard-definitions/Observatorium',
+    },
+  },
+  data: {
+    'alertmanager-overview.json': std.manifestJsonEx(mixin.grafanaDashboards['alertmanager-overview.json'], '  '),
+  },
+}

go.mod

@@ -0,0 +1,14 @@
+module github.com/rhobs/monitoring
+
+go 1.23.3
+
+require (
+	github.com/ghodss/yaml v1.0.0
+	github.com/google/go-jsonnet v0.20.0
+	github.com/magefile/mage v1.15.0
+)
+
+require (
+	gopkg.in/yaml.v2 v2.2.7 // indirect
+	sigs.k8s.io/yaml v1.1.0 // indirect
+)

go.sum

@@ -0,0 +1,14 @@
+github.com/ghodss/yaml v1.0.0 h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/google/go-jsonnet v0.20.0 h1:WG4TTSARuV7bSm4PMB4ohjxe33IHT5WVTrJSU33uT4g=
+github.com/google/go-jsonnet v0.20.0/go.mod h1:VbgWF9JX7ztlv770x/TolZNGGFfiHEVx9G6ca2eUmeA=
+github.com/magefile/mage v1.15.0 h1:BvGheCMAsG3bWUDbZ8AyXXpCNwU9u5CB6sM+HNb9HYg=
+github.com/magefile/mage v1.15.0/go.mod h1:z5UZb/iS3GoOSn0JgWuiw7dxlurVYTu+/jHXqQg881A=
+github.com/sergi/go-diff v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
+github.com/sergi/go-diff v1.1.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+sigs.k8s.io/yaml v1.1.0 h1:4A07+ZFc2wgJwo8YNlQpr1rVlgUDlxXHhPJciaPY5gs=
+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=

jsonnetfile.json

@@ -0,0 +1,15 @@
+{
+  "version": 1,
+  "dependencies": [
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/prometheus/alertmanager.git",
+          "subdir": "doc/alertmanager-mixin"
+        }
+      },
+      "version": "main"
+    }
+  ],
+  "legacyImports": true
+}

jsonnetfile.lock.json

@@ -0,0 +1,56 @@
+{
+  "version": 1,
+  "dependencies": [
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/grafana/grafonnet.git",
+          "subdir": "gen/grafonnet-latest"
+        }
+      },
+      "version": "d20e609202733790caf5b554c9945d049f243ae3",
+      "sum": "V9vAj21qJOc2DlMPDgB1eEjSQU4A+sAA4AXuJ6bd4xc="
+    },
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/grafana/grafonnet.git",
+          "subdir": "gen/grafonnet-v11.4.0"
+        }
+      },
+      "version": "d20e609202733790caf5b554c9945d049f243ae3",
+      "sum": "aVAX09paQYNOoCSKVpuk1exVIyBoMt/C50QJI+Q/3nA="
+    },
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/jsonnet-libs/docsonnet.git",
+          "subdir": "doc-util"
+        }
+      },
+      "version": "6ac6c69685b8c29c54515448eaca583da2d88150",
+      "sum": "BrAL/k23jq+xy9oA7TWIhUx07dsA/QLm3g7ktCwe//U="
+    },
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/jsonnet-libs/xtd.git",
+          "subdir": ""
+        }
+      },
+      "version": "1199b50e9d2ff53d4bb5fb2304ad1fb69d38e609",
+      "sum": "LfbgcJbilu4uBdKYZSvmkoOTPwEAzg10L3/VqKAIWtA="
+    },
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/prometheus/alertmanager.git",
+          "subdir": "doc/alertmanager-mixin"
+        }
+      },
+      "version": "d0eaa9fcd116fd2ef87390cd0f6966b2dfaee6f5",
+      "sum": "Mf4h1BYLle2nrgjf/HXrBbl0Zk8N+xaoEM017o0BC+k="
+    }
+  ],
+  "legacyImports": false
+}

magefiles/dashboards.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/ghodss/yaml"
+	"github.com/google/go-jsonnet"
+	"github.com/magefile/mage/mg"
+	"github.com/magefile/mage/sh"
+)
+
+const (
+	vendorPath = "./vendor_jsonnet"
+
+	dashboardSource = "./dashboards/"
+	dashboardPath   = "./resources/dashboards/"
+)
+
+type (
+	Dashboards mg.Namespace
+)
+
+// Alertmanager Generates the Alertmanager dashboard
+func (d Dashboards) Alertmanager() error {
+	err := sh.Run("jb", "update", "github.com/prometheus/alertmanager/doc/alertmanager-mixin@main", `--jsonnetpkg-home=vendor_jsonnet`)
+
+	const (
+		filename = "alertmanager.jsonnet"
+		fileOut  = "alertmanager.yaml"
+	)
+
+	vm := getVM()
+	j, err := vm.EvaluateFile(getDashboardFile(filename))
+	if err != nil {
+		panic(err)
+	}
+
+	err = writeDashboardFile(fileOut, j)
+	if err != nil {
+		return fmt.Errorf("failed to write dashboard file: %w", err)
+	}
+	return nil
+}
+
+func getVM() *jsonnet.VM {
+	vm := jsonnet.MakeVM()
+	vm.Importer(&jsonnet.FileImporter{
+		JPaths: []string{
+			vendorPath,
+		},
+	})
+	return vm
+}
+
+func getDashboardFile(filename string) string {
+	return fmt.Sprint(dashboardSource, filename)
+}
+
+func writeDashboardFile(filename string, jsonContent string) error {
+	b, err := yaml.JSONToYAML([]byte(jsonContent))
+	if err != nil {
+		return fmt.Errorf("failed to convert json to yaml: %w", err)
+	}
+
+	err = os.WriteFile(fmt.Sprint(dashboardPath, filename), b, 0644)
+	if err != nil {
+		return fmt.Errorf("failed to write file: %w", err)
+	}
+	return nil
+}