Add statuspoller functionality

This first implementation intentionally ignores perfdata.

README.md

@@ -14,7 +14,7 @@ Example usage:
 * Create dashboards in Kibana with metrics collected by Icinga 2
 * Monitor notifications sent by Icinga 2
 
-**StatusPoller:** The Icinga 2 API exports lots of information about the state
+**Statuspoller:** The Icinga 2 API exports lots of information about the state
 of the Icinga daemon. These information can be polled periodically.
 
 Example usage:
@@ -110,8 +110,12 @@ Example for the CheckResult type with the service matching the string pattern
 filter: 'match("mysql*", event.service)'
 ```
 
-### StatusPoller
+### Statuspoller
-StatusPoller is not implemented yet.
+These settings are specific to the statuspoller mode.
+
+#### `interval`
+Interval at which the status API is called. Set to `0` to disable polling.
+Defaults to `60s`
 
 ## Run
 To run Icingabeat with debugging output enabled, run:

_meta/beat.yml

@@ -57,3 +57,7 @@ icingabeat:
     #
     # To disable filtering set an empty string or comment out the filter option
     filter: ""
+
+  statuspoller:
+    # Interval at which the status API is called. Set to 0 to disable polling.
+    interval: 60s

beater/icingabeat.go

@@ -34,16 +34,21 @@ func New(b *beat.Beat, cfg *common.Config) (beat.Beater, error) {
 
 // Run Icingabeat
 func (bt *Icingabeat) Run(b *beat.Beat) error {
-	var eventstream *Eventstream
-
 	logp.Info("icingabeat is running! Hit CTRL-C to stop it.")
 	bt.client = b.Publisher.Connect()
 
 	if len(bt.config.Eventstream.Types) > 0 {
+		var eventstream *Eventstream
 		eventstream = NewEventstream(bt, bt.config)
 		go eventstream.Run()
 	}
 
+	if bt.config.Statuspoller.Interval > 0 {
+		var statuspoller *Statuspoller
+		statuspoller = NewStatuspoller(bt, bt.config)
+		go statuspoller.Run()
+	}
+
 	for {
 		select {
 		case <-bt.done:

beater/statuspoller.go

@@ -0,0 +1,107 @@
+package beater
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/url"
+	"strconv"
+	"time"
+
+	"github.com/icinga/icingabeat/config"
+
+	"github.com/elastic/beats/libbeat/common"
+	"github.com/elastic/beats/libbeat/logp"
+)
+
+// Statuspoller type
+type Statuspoller struct {
+	icingabeat *Icingabeat
+	config     config.Config
+
+	done chan struct{}
+}
+
+// NewStatuspoller ...
+func NewStatuspoller(bt *Icingabeat, cfg config.Config) *Statuspoller {
+	statuspoller := &Statuspoller{
+		icingabeat: bt,
+		done:       make(chan struct{}),
+		config:     cfg,
+	}
+	return statuspoller
+}
+
+// Run evenstream receiver
+func (sp *Statuspoller) Run() error {
+	host := sp.config.Host + ":" + strconv.Itoa(sp.config.Port)
+	var URL *url.URL
+
+	URL, err := url.Parse("https://" + host)
+	if err != nil {
+		logp.Info("Invalid request URL")
+	}
+
+	URL.Path += "/v1/status"
+
+	for {
+		ticker := time.NewTicker(sp.config.Statuspoller.Interval)
+		response, responseErr := requestURL(sp.icingabeat, "GET", URL)
+		var event common.MapStr
+
+		if responseErr == nil {
+			body, err := ioutil.ReadAll(response.Body)
+			if err != nil {
+				logp.Warn("Response body invalid: %v", err)
+			}
+
+			if err := json.Unmarshal(body, &event); err != nil {
+				logp.Info("Unmarshal problem %v", err)
+
+				if err == io.ErrUnexpectedEOF || err == io.EOF {
+					break
+				}
+				continue
+			}
+
+			for _, result := range event {
+				switch statustype := result.(type) {
+				case []interface{}:
+
+					for _, status := range statustype {
+						fmt.Println(status)
+
+						statusevent := common.MapStr{
+							"@timestamp": common.Time(time.Now()),
+							"type":       "icingabeat.status",
+						}
+
+						for key, value := range status.(map[string]interface{}) {
+							if key != "perfdata" {
+								statusevent.Put(key, value)
+							}
+						}
+
+						sp.icingabeat.client.PublishEvent(statusevent)
+						logp.Info("Event sent")
+					}
+				}
+			}
+		} else {
+			logp.Info("Error connecting to API: %v", responseErr)
+		}
+
+		select {
+		case <-sp.done:
+			return nil
+		case <-ticker.C:
+		}
+	}
+	return nil
+}
+
+// Stop eventstream receiver
+func (sp *Statuspoller) Stop() {
+	close(sp.done)
+}

config/config.go

@@ -14,6 +14,7 @@ type Config struct {
 	RetryInterval time.Duration      `config:"retry_interval"`
 	SkipSSLVerify bool               `config:"skip_ssl_verify"`
 	Eventstream   EventstreamConfig  `config:"eventstream"`
+	Statuspoller  StatuspollerConfig `config:"statuspoller"`
 }
 
 // EventstreamConfig optoins
@@ -22,6 +23,11 @@ type EventstreamConfig struct {
 	Filter string   `config:"filter"`
 }
 
+// StatuspollerConfig options
+type StatuspollerConfig struct {
+	Interval time.Duration `config:"interval"`
+}
+
 // DefaultConfig values
 var DefaultConfig = Config{
 	RetryInterval: 1 * time.Second,

icingabeat.full.yml

@@ -58,6 +58,10 @@ icingabeat:
     # To disable filtering set an empty string or comment out the filter option
     filter: ""
 
+  statuspoller:
+    # Interval at which the status API is called. Set to 0 to disable polling.
+    interval: 60s
+
 #================================ General ======================================
 
 # The name of the shipper that publishes the network data. It can be used to group

icingabeat.yml

@@ -58,6 +58,10 @@ icingabeat:
     # To disable filtering set an empty string or comment out the filter option
     filter: ""
 
+  statuspoller:
+    # Interval at which the status API is called. Set to 0 to disable polling.
+    interval: 60s
+
 #================================ General =====================================
 
 # The name of the shipper that publishes the network data. It can be used to group