Merge pull request #1 from patrickjahns/initial_version

Initial version

Author: patrickjahns

Makefile

@@ -28,8 +28,8 @@ ifndef REVISION
 endif
 
 LDFLAGS += -s -w
-LDFLAGS += -X "$(IMPORT)/pkg/version.String=$(VERSION)"
-LDFLAGS += -X "$(IMPORT)/pkg/version.Date=$(DATE)"
+LDFLAGS += -X "$(IMPORT)/pkg/version.Version=$(VERSION)"
+LDFLAGS += -X "$(IMPORT)/pkg/version.BuildDate=$(DATE)"
 LDFLAGS += -X "$(IMPORT)/pkg/version.Revision=$(REVISION)"
 
 .PHONY: all
@@ -38,6 +38,7 @@ all: build
 .PHONY: clean
 clean:
 	$(GO) clean -i ./...
+	rm -rf $(BIN)/
 	rm -rf $(DIST)/
 
 .PHONY: sync

example/version1.status

@@ -0,0 +1,16 @@
+OpenVPN CLIENT LIST
+Updated,Thu Apr 23 20:14:31 2020
+Common Name,Real Address,Bytes Received,Bytes Sent,Connected Since
+user1,1.2.3.4:60102,7883858,7762340,Wed Apr 22 12:36:42 2020
+user2,1.2.3.5:50976,1673200,2065632,Wed Apr 22 12:36:52 2020
+[email protected],1.2.3.6:57688,19602844,23599532,Wed Apr 22 12:42:45 2020
+user4,1.2.3.7:40832,582207,575193,Wed Apr 22 12:36:54 2020
+ROUTING TABLE
+Virtual Address,Common Name,Real Address,Last Ref
+10.240.1.222,user4,1.2.3.7:40832,Wed Apr 22 12:36:56 2020
+10.240.10.126,user1,1.2.3.4:50976,Thu Apr 23 18:44:56 2020
+10.240.79.134,user2,1.2.3.5:60102,Thu Apr 23 20:14:30 2020
+10.240.37.214,[email protected],1.2.3.6:57688,Thu Apr 23 20:14:16 2020
+GLOBAL STATS
+Max bcast/mcast queue length,5
+END

go.mod

@@ -3,7 +3,7 @@ module github.com/patrickjahns/openvpn_exporter
 go 1.14
 
 require (
-	github.com/hashicorp/go-version v1.2.0 // indirect
-	github.com/mitchellh/gox v1.0.1 // indirect
+	github.com/go-kit/kit v0.9.0
+	github.com/prometheus/client_golang v1.5.1
 	github.com/urfave/cli/v2 v2.2.0
 )

go.sum

@@ -1,21 +1,103 @@
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pkg/collector/exporter.go

@@ -0,0 +1,86 @@
+package collector
+
+import (
+	"time"
+
+	"github.com/go-kit/kit/log"
+	"github.com/go-kit/kit/log/level"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+const (
+	// namespace defines the namespace for the exporter.
+	namespace = "openvpn"
+)
+
+// GeneralCollector collects metrics, mostly runtime, about this exporter in general.
+type GeneralCollector struct {
+	logger    log.Logger
+	version   string
+	revision  string
+	buildDate string
+	goVersion string
+	started   time.Time
+
+	StartTime *prometheus.Desc
+	BuildInfo *prometheus.Desc
+}
+
+// NewGeneralCollector returns a new GeneralCollector.
+func NewGeneralCollector(logger log.Logger, version string, revision string, buildDate string, goVersion string, started time.Time) *GeneralCollector {
+	return &GeneralCollector{
+		logger:    logger,
+		version:   version,
+		revision:  revision,
+		buildDate: buildDate,
+		goVersion: goVersion,
+		started:   started,
+
+		StartTime: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, "", "start_time"),
+			"Unix timestamp of the start time",
+			nil,
+			nil,
+		),
+
+		BuildInfo: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, "", "build_info"),
+			"A metric with a constant '1' value labeled by version information",
+			[]string{"version", "revision", "date", "go"},
+			nil,
+		),
+	}
+}
+
+// Describe sends the super-set of all possible descriptors of metrics collected by this Collector.
+func (c *GeneralCollector) Describe(ch chan<- *prometheus.Desc) {
+	ch <- c.StartTime
+	ch <- c.BuildInfo
+}
+
+// Collect is called by the Prometheus registry when collecting metrics.
+func (c *GeneralCollector) Collect(ch chan<- prometheus.Metric) {
+	level.Debug(c.logger).Log(
+		"started", c.started.Unix(),
+		"version", c.version,
+		"revision", c.revision,
+		"buildDate", c.buildDate,
+		"goVersion", c.goVersion,
+		"started", c.started,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.StartTime,
+		prometheus.GaugeValue,
+		float64(c.started.Unix()),
+	)
+
+	ch <- prometheus.MustNewConstMetric(
+		c.BuildInfo,
+		prometheus.GaugeValue,
+		1.0,
+		c.version,
+		c.revision,
+		c.buildDate,
+		c.goVersion,
+	)
+}

pkg/collector/openvpn.go

@@ -0,0 +1,145 @@
+package collector
+
+import (
+	"github.com/go-kit/kit/log"
+	"github.com/go-kit/kit/log/level"
+	"github.com/patrickjahns/openvpn_exporter/pkg/openvpn"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+// OpenVPNCollector collects metrics from openvpn status files
+type OpenVPNCollector struct {
+	logger                log.Logger
+	name                  string
+	statusFile            string
+	LastUpdated           *prometheus.Desc
+	ConnectedClients      *prometheus.Desc
+	BytesReceived         *prometheus.Desc
+	BytesSent             *prometheus.Desc
+	ConnectedSince        *prometheus.Desc
+	MaxBcastMcastQueueLen *prometheus.Desc
+}
+
+// NewOpenVPNCollector returns a new OpenVPNCollector
+func NewOpenVPNCollector(logger log.Logger, name string, statusFile string) *OpenVPNCollector {
+	return &OpenVPNCollector{
+		logger:     logger,
+		statusFile: statusFile,
+		name:       name,
+
+		LastUpdated: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, "", "last_updated"),
+			"Unix timestamp when the last time the status was updated",
+			[]string{"server"},
+			nil,
+		),
+		ConnectedClients: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, "", "connections"),
+			"Amount of currently connected clients",
+			[]string{"server"},
+			nil,
+		),
+		MaxBcastMcastQueueLen: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, "", "max_bcast_mcast_queue_len"),
+			"MaxBcastMcastQueueLen of the server",
+			[]string{"server"},
+			nil,
+		),
+		BytesReceived: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, "", "bytes_received"),
+			"Amount of data received via the connection",
+			[]string{"server", "common_name"},
+			nil,
+		),
+		BytesSent: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, "", "bytes_sent"),
+			"Amount of data sent via the connection",
+			[]string{"server", "common_name"},
+			nil,
+		),
+		ConnectedSince: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, "", "connected_since"),
+			"Unixtimestamp when the connection was established",
+			[]string{"server", "common_name"},
+			nil,
+		),
+	}
+}
+
+// Describe sends the super-set of all possible descriptors of metrics collected by this Collector.
+func (c *OpenVPNCollector) Describe(ch chan<- *prometheus.Desc) {
+	ch <- c.LastUpdated
+	ch <- c.ConnectedClients
+	ch <- c.BytesSent
+	ch <- c.BytesReceived
+	ch <- c.ConnectedSince
+	ch <- c.MaxBcastMcastQueueLen
+}
+
+// Collect is called by the Prometheus registry when collecting metrics.
+func (c *OpenVPNCollector) Collect(ch chan<- prometheus.Metric) {
+	level.Debug(c.logger).Log(
+		"statusFile", c.statusFile,
+		"name", c.name,
+	)
+	status, err := openvpn.ParseFile(c.statusFile)
+	if err != nil {
+		level.Warn(c.logger).Log(
+			"msg", "error parsing statusfile",
+			"err", err,
+		)
+		return
+	}
+
+	connectedClients := 0
+	for _, client := range status.ClientList {
+		connectedClients++
+		level.Debug(c.logger).Log(
+			"commonName", client.CommonName,
+			"connectedSince", client.ConnectedSince.Unix(),
+			"bytesReceived", client.BytesReceived,
+			"bytesSent", client.BytesSent,
+		)
+		ch <- prometheus.MustNewConstMetric(
+			c.BytesReceived,
+			prometheus.GaugeValue,
+			client.BytesReceived,
+			c.name, client.CommonName,
+		)
+		ch <- prometheus.MustNewConstMetric(
+			c.BytesSent,
+			prometheus.GaugeValue,
+			client.BytesSent,
+			c.name, client.CommonName,
+		)
+		ch <- prometheus.MustNewConstMetric(
+			c.ConnectedSince,
+			prometheus.GaugeValue,
+			float64(client.ConnectedSince.Unix()),
+			c.name, client.CommonName,
+		)
+	}
+	level.Debug(c.logger).Log(
+		"updatedAt", status.UpdatedAt,
+		"connectedClients", connectedClients,
+		"maxBcastMcastQueueLen", status.GlobalStats.MaxBcastMcastQueueLen,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.ConnectedClients,
+		prometheus.GaugeValue,
+		float64(connectedClients),
+		c.name,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.LastUpdated,
+		prometheus.GaugeValue,
+		float64(status.UpdatedAt.Unix()),
+		c.name,
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.MaxBcastMcastQueueLen,
+		prometheus.GaugeValue,
+		float64(status.GlobalStats.MaxBcastMcastQueueLen),
+		c.name,
+	)
+}