Beginnings of a Prometheus status page.

appstate/appstate.go

@@ -0,0 +1,28 @@
+// Copyright 2013 Prometheus Team
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package appstate
+
+import (
+	"github.com/prometheus/prometheus/config"
+	"github.com/prometheus/prometheus/retrieval"
+	"github.com/prometheus/prometheus/rules"
+	"github.com/prometheus/prometheus/storage/metric"
+)
+
+type ApplicationState struct {
+	Config        *config.Config
+	RuleManager   rules.RuleManager
+	Persistence   metric.MetricPersistence
+	TargetManager retrieval.TargetManager
+}

main.go

@@ -15,6 +15,7 @@ package main
 
 import (
 	"flag"
+	"github.com/prometheus/prometheus/appstate"
 	"github.com/prometheus/prometheus/config"
 	"github.com/prometheus/prometheus/retrieval"
 	"github.com/prometheus/prometheus/retrieval/format"
@@ -73,7 +74,14 @@ func main() {
 		log.Fatalf("Error loading rule files: %v", err)
 	}
 
-	web.StartServing(persistence)
+	appState := &appstate.ApplicationState{
+		Config:        conf,
+		RuleManager:   ruleManager,
+		Persistence:   persistence,
+		TargetManager: targetManager,
+	}
+
+	web.StartServing(appState)
 
 	for {
 		select {

web/api/api.go

@@ -17,8 +17,8 @@ type MetricsService struct {
 	time        utility.Time
 }
 
-func NewMetricsService(p metric.MetricPersistence) *MetricsService {
+func NewMetricsService(persistence metric.MetricPersistence) *MetricsService {
 	return &MetricsService{
-		persistence: p,
+		persistence: persistence,
 	}
 }

web/static/css/graph.css

@@ -0,0 +1,23 @@
+body {
+  margin: 0;
+}
+
+.graph_container {
+        font-family: Arial, Helvetica, sans-serif;
+}
+
+.graph {
+        position: relative;
+}
+
+svg {
+  border: 1px solid #aaa;
+  margin-bottom: 5px;
+}
+
+.legend {
+        display: inline-block;
+        vertical-align: top;
+        margin: 0 0 0 0px;
+        background-
+}

web/static/css/prometheus.css

@@ -1,5 +1,4 @@
 body {
-  margin: 0;
   font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
   font-size: 14px;
   line-height: 20px;
@@ -7,26 +6,6 @@ body {
   background-color: #eee;
 }
 
-.graph_container {
-        font-family: Arial, Helvetica, sans-serif;
-}
-
-.graph {
-        position: relative;
-}
-
-svg {
-  border: 1px solid #aaa;
-  margin-bottom: 5px;
-}
-
-.legend {
-        display: inline-block;
-        vertical-align: top;
-        margin: 0 0 0 0px;
-        background-
-}
-
 input:not([type=submit]):not([type=file]):not([type=button]) {
   border: 1px solid #aaa;
   -webkit-border-radius: 3px;

web/static/graph.html

@@ -6,6 +6,7 @@
     <script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
     <script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.8.15/jquery-ui.min.js"></script>
     <link type="text/css" rel="stylesheet" href="css/prometheus.css">
+    <link type="text/css" rel="stylesheet" href="css/graph.css">
 
     <!-- copy all these CSSen/JSen to our own location -->
     <link type="text/css" rel="stylesheet" href="http://code.shutterstock.com/rickshaw/rickshaw.min.css">

web/static/index.html

@@ -4,6 +4,7 @@
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
     <title>Prometheus Expression Browser</title>
     <link type="text/css" rel="stylesheet" href="css/prometheus.css">
+    <link type="text/css" rel="stylesheet" href="css/graph.css">
     <script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
     <script src="js/exprBrowser.js"></script>
   </head>

web/status.go

@@ -0,0 +1,42 @@
+// Copyright 2013 Prometheus Team
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package web
+
+import (
+	"github.com/prometheus/prometheus/appstate"
+	"html/template"
+	"net/http"
+)
+
+type PrometheusStatus struct {
+	Status  string
+	Config  string
+	Rules   string
+	Targets string
+}
+
+type StatusHandler struct {
+	appState *appstate.ApplicationState
+}
+
+func (h *StatusHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	status := &PrometheusStatus{
+		Status:  "TODO: add status information here",
+		Config:  h.appState.Config.ToString(0),
+		Rules:   "TODO: list rules here",
+		Targets: "TODO: list targets here",
+	}
+	t, _ := template.ParseFiles("web/templates/status.html")
+	t.Execute(w, status)
+}

web/templates/status.html

@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <title>Prometheus Status</title>
+    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
+    <link type="text/css" rel="stylesheet" href="static/css/prometheus.css">
+  </head>
+
+  <body>
+		<h2>Status</h2>
+		<div class="grouping_box">
+{{.Status}}
+		</div>
+
+		<h2>Configuration</h2>
+		<div class="grouping_box">
+		<pre>
+{{.Config}}
+		</pre>
+		</div>
+
+    <h2>Rules</h2>
+		<div class="grouping_box">
+{{.Rules}}
+		</div>
+
+		<h2>Targets</h2>
+		<div class="grouping_box">
+{{.Targets}}
+		</div>
+  </body>
+</html>

web/web.go

@@ -17,7 +17,7 @@ import (
 	"code.google.com/p/gorest"
 	"flag"
 	"github.com/prometheus/client_golang"
-	"github.com/prometheus/prometheus/storage/metric"
+	"github.com/prometheus/prometheus/appstate"
 	"github.com/prometheus/prometheus/web/api"
 	"net/http"
 	_ "net/http/pprof"
@@ -28,11 +28,13 @@ var (
 	listenAddress = flag.String("listenAddress", ":9090", "Address to listen on for web interface.")
 )
 
-func StartServing(persistence metric.MetricPersistence) {
-	gorest.RegisterService(api.NewMetricsService(persistence))
+func StartServing(appState *appstate.ApplicationState) {
+	gorest.RegisterService(api.NewMetricsService(appState.Persistence))
+	exporter := registry.DefaultRegistry.YieldExporter()
 
-	http.Handle("/", gorest.Handle())
-	http.Handle("/metrics.json", registry.DefaultHandler)
+	http.Handle("/status", &StatusHandler{appState: appState})
+	http.Handle("/api/", gorest.Handle())
+	http.Handle("/metrics.json", exporter)
 	http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("web/static"))))
 
 	go http.ListenAndServe(*listenAddress, nil)