Changed daemon target from flag to url param. Build files.

Author: conr

.promu

@@ -0,0 +1,42 @@
+go:
+    cgo: false
+repository:
+    path: github.com/RobustPerception/nrpe_exporter
+build:
+    binaries:
+        - name: nrpe_exporter
+    flags: -a -tags netgo
+    ldflags: |
+        -X {{repoPath}}/version.Version={{.Version}}
+        -X {{repoPath}}/version.Revision={{.Revision}}
+        -X {{repoPath}}/version.Branch={{.Branch}}
+        -X {{repoPath}}/version.BuildUser={{user}}@{{host}}
+        -X {{repoPath}}/version.BuildDate={{date "20060102-15:04:05"}}
+tarball:
+    prefix: .
+    files:
+        - LICENSE
+crossbuild:
+    platforms:
+        - linux/amd64
+        - linux/386
+        - darwin/amd64
+        - darwin/386
+        - windows/amd64
+        - windows/386
+        - freebsd/amd64
+        - freebsd/386
+        - openbsd/amd64
+        - openbsd/386
+        - netbsd/amd64
+        - netbsd/386
+        - dragonfly/amd64
+        - linux/arm
+        - linux/arm64
+        - freebsd/arm
+        - openbsd/arm
+        - netbsd/arm
+        - linux/ppc64
+        - linux/ppc64le
+        - linux/mips64
+        - linux/mips64le

README.md

@@ -7,10 +7,10 @@ The NRPE exporter allows for the exposing of nrpe server command's metrics, name
 ### Local Build
 
     go build nrpe_exporter.go
-    ./nrpe_exporter --nrpe-server-address=<nrpe-server-address>
+    ./nrpe_exporter
 
-Visiting [http://localhost:9275/export?command=check_load](http://localhost:9275/export?command=check_load)
-will return metrics for the command 'check_load' agaisnt a locally running nrpe-server.
+Visiting [http://localhost:9275/export?command=check_load&target=127.0.0.1:5666](http://localhost:9275/export?command=check_load&target=127.0.0.1:5666)
+will return metrics for the command 'check_load' against a locally running NRPE server.
 
 ### Building with Docker
 
@@ -28,7 +28,7 @@ Note: The NRPE server you're connecting to must be configured with SSL disabled
 
 ## Prometheus Configuration
 
-The NRPE exporter needs to be passed a nrpe server command as a parameter, this can be
+The NRPE exporter needs to be passed a NRPE server command as a parameter, this can be
 done with relabelling.
 
 Example config:
@@ -39,6 +39,7 @@ scrape_configs:
   - job_name: nrpe
     metrics_path: /export
     params:
+      target: [127.0.0.1:5666]
       command: [check_load]
     static_configs:
       - targets:

VERSION

@@ -0,0 +1 @@
+0.1.0

nrpe_exporter.go

@@ -18,13 +18,13 @@ import (
 )
 
 var (
-	listenAddress     = kingpin.Flag("web.listen-address", "The address to listen on for HTTP requests.").Default(":9275").String()
-	nrpeServerAddress = kingpin.Flag("nrpe-server-address", "The address of the NRPE server.").Required().String()
+	listenAddress = kingpin.Flag("web.listen-address", "The address to listen on for HTTP requests.").Default(":9275").String()
 )
 
 // Collector type containing issued command and a logger
 type Collector struct {
 	command string
+	target  string
 	logger  log.Logger
 }
 
@@ -61,7 +61,7 @@ func collectCommandMetrics(cmd string, conn net.Conn, logger log.Logger) (Comman
 // Collect dials nrpe-server and issues given command, recording metrics based on the result.
 func (c *Collector) Collect(ch chan<- prometheus.Metric) {
 	// Connect to NRPE server
-	conn, err := net.Dial("tcp", *nrpeServerAddress)
+	conn, err := net.Dial("tcp", c.target)
 	if err != nil {
 		level.Error(c.logger).Log("msg", "Error dialing NRPE server", "err", err)
 		return
@@ -92,22 +92,28 @@ func (c *Collector) Collect(ch chan<- prometheus.Metric) {
 }
 
 // NewCollector returns new collector with logger and given command
-func NewCollector(command string, logger log.Logger) *Collector {
+func NewCollector(command, target string, logger log.Logger) *Collector {
 	return &Collector{
 		command: command,
+		target:  target,
 		logger:  logger,
 	}
 }
 
 func handler(w http.ResponseWriter, r *http.Request, logger log.Logger) {
 	params := r.URL.Query()
+	target := params.Get("target")
+	if target == "" {
+		http.Error(w, "Target parameter is missing", 400)
+		return
+	}
 	cmd := params.Get("command")
 	if cmd == "" {
 		http.Error(w, "Command parameter is missing", 400)
 		return
 	}
 	registry := prometheus.NewRegistry()
-	collector := NewCollector(cmd, logger)
+	collector := NewCollector(cmd, target, logger)
 	registry.MustRegister(collector)
 	h := promhttp.HandlerFor(registry, promhttp.HandlerOpts{})
 	h.ServeHTTP(w, r)
@@ -130,10 +136,7 @@ func main() {
             <body>
             <h1>NRPE Exporter</h1>
 						<p><a href="/metrics">Metrics</a></p>
-						<form action="/export">
-						<label>NRPE Command:</label> <input type="text" name="command" placeholder="check_load" value="check_load">
-						<input type="submit" value="Submit">
-						</form>
+						<p><a href="/export?command=check_load&target=127.0.0.1:5666">check_load against localhost:5666</a></p>
             </body>
             </html>`))
 	})