Make review changes to logstash input (#6299)

.gitignore

@@ -1,10 +1,5 @@
-# Build and binaries
 /build
 /telegraf
 /telegraf.exe
 /telegraf.gz
 /vendor
-
-# Editor files
-*~
-.idea

internal/choice/choice.go

@@ -0,0 +1,36 @@
+// Package choice provides basic functions for working with
+// plugin options that must be one of several values.
+package choice
+
+import "fmt"
+
+// Contains return true if the choice in the list of choices.
+func Contains(choice string, choices []string) bool {
+	for _, item := range choices {
+		if item == choice {
+			return true
+		}
+	}
+	return false
+}
+
+// CheckSContains returns an error if a choice is not one of
+// the available choices.
+func Check(choice string, available []string) error {
+	if !Contains(choice, available) {
+		return fmt.Errorf("unknown choice %s", choice)
+	}
+	return nil
+}
+
+// CheckSliceContains returns an error if the choices is not a subset of
+// available.
+func CheckSlice(choices, available []string) error {
+	for _, choice := range choices {
+		err := Check(choice, available)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

plugins/inputs/logstash/README.md

@@ -3,62 +3,52 @@
 This plugin reads metrics exposed by
 [Logstash Monitoring API](https://www.elastic.co/guide/en/logstash/current/monitoring-logstash.html).
 
-### Configuration:
+Logstash 5 and later is supported.
+
+### Configuration
 
 ```toml
-  ## This plugin reads metrics exposed by Logstash Monitoring API.
+[[inputs.logstash]]
-  ## https://www.elastic.co/guide/en/logstash/current/monitoring.html
+  ## The URL of the exposed Logstash API endpoint.
-
-  ## The URL of the exposed Logstash API endpoint
   url = "http://127.0.0.1:9600"
 
-  ## Enable Logstash 6+ multi-pipeline statistics support
+  ## Use Logstash 5 single pipeline API, set to true when monitoring
-  multi_pipeline = true
+  ## Logstash 5.
+  # single_pipeline = false
 
-  ## Should the general process statistics be gathered
+  ## Enable optional collection components.  Can contain
-  collect_process_stats = true
+  ## "pipelines", "process", and "jvm".
+  # collect = ["pipelines", "process", "jvm"]
 
-  ## Should the JVM specific statistics be gathered
+  ## Timeout for HTTP requests.
-  collect_jvm_stats = true
+  # timeout = "5s"
 
-  ## Should the event pipelines statistics be gathered
+  ## Optional HTTP Basic Auth credentials.
-  collect_pipelines_stats = true
-
-  ## Should the plugin statistics be gathered
-  collect_plugins_stats = true
-
-  ## Should the queue statistics be gathered
-  collect_queue_stats = true
-
-  ## HTTP method
-  # method = "GET"
-
-  ## Optional HTTP headers
-  # headers = {"X-Special-Header" = "Special-Value"}
-
-  ## Override HTTP "Host" header
-  # host_header = "logstash.example.com"
-
-  ## Timeout for HTTP requests
-  timeout = "5s"
-
-  ## Optional HTTP Basic Auth credentials
   # username = "username"
   # password = "pa$$word"
 
-  ## Optional TLS Config
+  ## Optional TLS Config.
   # tls_ca = "/etc/telegraf/ca.pem"
   # tls_cert = "/etc/telegraf/cert.pem"
   # tls_key = "/etc/telegraf/key.pem"
 
-  ## Use TLS but skip chain & host verification
+  ## Use TLS but skip chain & host verification.
   # insecure_skip_verify = false
+
+  ## Optional HTTP headers.
+  # [inputs.logstash.headers]
+  #   "X-Special-Header" = "Special-Value"
 ```
 
-### Measurements & Fields:
+### Metrics
 
-- **logstash_jvm**
+- logstash_jvm
-  * Fields:
+  - tags:
+    - node_id
+    - node_name
+    - node_host
+    - node_version
+  - fields:
     - threads_peak_count
     - mem_pools_survivor_peak_max_in_bytes
     - mem_pools_survivor_max_in_bytes
@@ -87,14 +77,14 @@ This plugin reads metrics exposed by
     - mem_heap_used_in_bytes
     - gc_collectors_young_collection_count
     - uptime_in_millis
-  * Tags:
+
++ logstash_process
+  - tags:
     - node_id
     - node_name
-    - node_host
+    - source
     - node_version
-
+  - fields:
-- **logstash_process**
-  * Fields:
     - open_file_descriptors
     - cpu_load_average_1m
     - cpu_load_average_5m
@@ -105,85 +95,60 @@ This plugin reads metrics exposed by
     - max_file_descriptors
     - mem_total_virtual_in_bytes
     - mem_total_virtual_in_bytes
-  * Tags:
+
+- logstash_events
+  - tags:
     - node_id
     - node_name
-    - node_host
+    - source
     - node_version
-
+    - pipeline (for Logstash 6+)
-- **logstash_events**
+  - fields:
-  * Fields:
     - queue_push_duration_in_millis
     - duration_in_millis
     - in
     - filtered
     - out
-  * Tags:
+
++ logstash_plugins
+  - tags:
     - node_id
     - node_name
-    - node_host
+    - source
     - node_version
-  	- pipeline (for Logstash 6 only)
+    - pipeline (for Logstash 6+)
-
+    - plugin_id
-- **logstash_plugins**
+    - plugin_name
-  * Fields:
+    - plugin_type
+  - fields:
     - queue_push_duration_in_millis (for input plugins only)
     - duration_in_millis
     - in
     - out
-  * Tags:
+
+- logstash_queue
+  - tags:
     - node_id
     - node_name
-    - node_host
+    - source
     - node_version
-  	- pipeline (for Logstash 6 only)
+    - pipeline (for Logstash 6+)
-  	- plugin_id
+    - queue_type
-  	- plugin_name
+  - fields:
-  	- plugin_type
-
-- **logstash_queue**
-  * Fields:
     - events
     - free_space_in_bytes
     - max_queue_size_in_bytes
     - max_unread_events
     - page_capacity_in_bytes
     - queue_size_in_bytes
-  * Tags:
-    - node_id
-    - node_name
-    - node_host
-    - node_version
-    - pipeline (for Logstash 6 only)
-    - queue_type  
 
-### Tags description
+### Example Output
-
-- node_id - The uuid of the logstash node. Randomly generated.
-- node_name - The name of the logstash node. Can be defined in the *logstash.yml* or defaults to the hostname.
-  Can be used to break apart metrics from different logstash instances of the same host.
-- node_host - The hostname of the logstash node.
-  Can be different from the telegraf's host if a remote connection to logstash instance is used.
-- node_version - The version of logstash service running on this node.
-- pipeline (for Logstash 6 only) - The name of a pipeline if multi-pipeline is configured.
-  Will defaults to "main" if there is only one pipeline and will be missing for logstash 5.
-- plugin_id - The unique id of this plugin.
-  It will be a randomly generated string unless it's defined in the logstash pipeline config file.
-- plugin_name - The name of this plugin. i.e. file, elasticsearch, date, mangle. 
-- plugin_type - The type of this plugin i.e. input/filter/output.
-- queue_type - The type of the event queue (memory/persisted).
-
-### Example Output:
 
 ```
-$ ./telegraf -config telegraf.conf -input-filter logstash -test
+logstash_jvm,node_id=3da53ed0-a946-4a33-9cdb-33013f2273f6,node_name=debian-stretch-logstash6.virt,node_version=6.8.1,source=debian-stretch-logstash6.virt gc_collectors_old_collection_count=2,gc_collectors_old_collection_time_in_millis=100,gc_collectors_young_collection_count=26,gc_collectors_young_collection_time_in_millis=1028,mem_heap_committed_in_bytes=1056309248,mem_heap_max_in_bytes=1056309248,mem_heap_used_in_bytes=207216328,mem_heap_used_percent=19,mem_non_heap_committed_in_bytes=160878592,mem_non_heap_used_in_bytes=140838184,mem_pools_old_committed_in_bytes=899284992,mem_pools_old_max_in_bytes=899284992,mem_pools_old_peak_max_in_bytes=899284992,mem_pools_old_peak_used_in_bytes=189468088,mem_pools_old_used_in_bytes=189468088,mem_pools_survivor_committed_in_bytes=17432576,mem_pools_survivor_max_in_bytes=17432576,mem_pools_survivor_peak_max_in_bytes=17432576,mem_pools_survivor_peak_used_in_bytes=17432576,mem_pools_survivor_used_in_bytes=12572640,mem_pools_young_committed_in_bytes=139591680,mem_pools_young_max_in_bytes=139591680,mem_pools_young_peak_max_in_bytes=139591680,mem_pools_young_peak_used_in_bytes=139591680,mem_pools_young_used_in_bytes=5175600,threads_count=20,threads_peak_count=24,uptime_in_millis=739089 1566425244000000000
-
+logstash_process,node_id=3da53ed0-a946-4a33-9cdb-33013f2273f6,node_name=debian-stretch-logstash6.virt,node_version=6.8.1,source=debian-stretch-logstash6.virt cpu_load_average_15m=0.03,cpu_load_average_1m=0.01,cpu_load_average_5m=0.04,cpu_percent=0,cpu_total_in_millis=83230,max_file_descriptors=16384,mem_total_virtual_in_bytes=3689132032,open_file_descriptors=118,peak_open_file_descriptors=118 1566425244000000000
-> logstash_jvm,host=node-6,node_host=node-6,node_id=3044f675-21ce-4335-898a-8408aa678245,node_name=node-6-test,node_version=6.4.2
+logstash_events,node_id=3da53ed0-a946-4a33-9cdb-33013f2273f6,node_name=debian-stretch-logstash6.virt,node_version=6.8.1,pipeline=main,source=debian-stretch-logstash6.virt duration_in_millis=0,filtered=0,in=0,out=0,queue_push_duration_in_millis=0 1566425244000000000
-  gc_collectors_old_collection_count=5,gc_collectors_old_collection_time_in_millis=702,gc_collectors_young_collection_count=95,gc_collectors_young_collection_time_in_millis=4772,mem_heap_committed_in_bytes=360804352,mem_heap_max_in_bytes=8389328896,mem_heap_used_in_bytes=252629768,mem_heap_used_percent=3,mem_non_heap_committed_in_bytes=212144128,mem_non_heap_used_in_bytes=188726024,mem_pools_old_committed_in_bytes=280260608,mem_pools_old_max_in_bytes=6583418880,mem_pools_old_peak_max_in_bytes=6583418880,mem_pools_old_peak_used_in_bytes=235352976,mem_pools_old_used_in_bytes=194754608,mem_pools_survivor_committed_in_bytes=8912896,mem_pools_survivor_max_in_bytes=200605696,mem_pools_survivor_peak_max_in_bytes=200605696,mem_pools_survivor_peak_used_in_bytes=8912896,mem_pools_survivor_used_in_bytes=4476680,mem_pools_young_committed_in_bytes=71630848,mem_pools_young_max_in_bytes=1605304320,mem_pools_young_peak_max_in_bytes=1605304320,mem_pools_young_peak_used_in_bytes=71630848,mem_pools_young_used_in_bytes=53398480,threads_count=60,threads_peak_count=62,uptime_in_millis=10469014 1540289864000000000
+logstash_plugins,node_id=3da53ed0-a946-4a33-9cdb-33013f2273f6,node_name=debian-stretch-logstash6.virt,node_version=6.8.1,pipeline=main,plugin_id=2807cb8610ba7854efa9159814fcf44c3dda762b43bd088403b30d42c88e69ab,plugin_name=beats,plugin_type=input,source=debian-stretch-logstash6.virt out=0,queue_push_duration_in_millis=0 1566425244000000000
-> logstash_process,host=node-6,node_host=node-6,node_id=3044f675-21ce-4335-898a-8408aa678245,node_name=node-6-test,node_version=6.4.2
+logstash_plugins,node_id=3da53ed0-a946-4a33-9cdb-33013f2273f6,node_name=debian-stretch-logstash6.virt,node_version=6.8.1,pipeline=main,plugin_id=7a6c973366186a695727c73935634a00bccd52fceedf30d0746983fce572d50c,plugin_name=file,plugin_type=output,source=debian-stretch-logstash6.virt duration_in_millis=0,in=0,out=0 1566425244000000000
-  cpu_load_average_15m=39.84,cpu_load_average_1m=32.87,cpu_load_average_5m=39.23,cpu_percent=0,cpu_total_in_millis=389920,max_file_descriptors=262144,mem_total_virtual_in_bytes=17921355776,open_file_descriptors=132,peak_open_file_descriptors=140 1540289864000000000
+logstash_queue,node_id=3da53ed0-a946-4a33-9cdb-33013f2273f6,node_name=debian-stretch-logstash6.virt,node_version=6.8.1,pipeline=main,queue_type=memory,source=debian-stretch-logstash6.virt events=0 1566425244000000000
-> logstash_events,host=node-6,node_host=node-6,node_id=3044f675-21ce-4335-898a-8408aa678245,node_name=node-6-test,node_version=6.4.2,pipeline=main
-  duration_in_millis=175144,filtered=4543,in=4543,out=4543,queue_push_duration_in_millis=19 1540289864000000000
-> logstash_plugins,host=node-6,node_host=node-6,node_id=3044f675-21ce-4335-898a-8408aa678245,node_name=node-6-test,node_version=6.4.2,pipeline=main,plugin_id=input-kafka,plugin_name=kafka,plugin_type=input
-  duration_in_millis=0,in=0,out=4543,queue_push_duration_in_millis=19 1540289864000000000
 ```

plugins/inputs/logstash/logstash.go

@@ -2,87 +2,64 @@ package logstash
 
 import (
 	"encoding/json"
-	"github.com/influxdata/telegraf"
+	"fmt"
-	"github.com/influxdata/telegraf/internal"
-	"github.com/influxdata/telegraf/internal/tls"
-	"github.com/influxdata/telegraf/plugins/inputs"
 	"net/http"
 	"net/url"
+	"strings"
 	"time"
 
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/internal"
+	"github.com/influxdata/telegraf/internal/choice"
+	"github.com/influxdata/telegraf/internal/tls"
+	"github.com/influxdata/telegraf/plugins/inputs"
 	jsonParser "github.com/influxdata/telegraf/plugins/parsers/json"
 )
 
-// ##### Interface #####
-
 const sampleConfig = `
-  ## This plugin reads metrics exposed by Logstash Monitoring API.
+  ## The URL of the exposed Logstash API endpoint.
-  ## https://www.elastic.co/guide/en/logstash/current/monitoring.html
-
-  ## The URL of the exposed Logstash API endpoint
   url = "http://127.0.0.1:9600"
 
-  ## Enable Logstash 6+ multi-pipeline statistics support
+  ## Use Logstash 5 single pipeline API, set to true when monitoring
-  multi_pipeline = true
+  ## Logstash 5.
+  # single_pipeline = false
 
-  ## Should the general process statistics be gathered
+  ## Enable optional collection components.  Can contain
-  collect_process_stats = true
+  ## "pipelines", "process", and "jvm".
+  # collect = ["pipelines", "process", "jvm"]
 
-  ## Should the JVM specific statistics be gathered
+  ## Timeout for HTTP requests.
-  collect_jvm_stats = true
+  # timeout = "5s"
 
-  ## Should the event pipelines statistics be gathered
+  ## Optional HTTP Basic Auth credentials.
-  collect_pipelines_stats = true
-
-  ## Should the plugin statistics be gathered
-  collect_plugins_stats = true
-
-  ## Should the queue statistics be gathered
-  collect_queue_stats = true
-
-  ## HTTP method
-  # method = "GET"
-
-  ## Optional HTTP headers
-  # headers = {"X-Special-Header" = "Special-Value"}
-
-  ## Override HTTP "Host" header
-  # host_header = "logstash.example.com"
-
-  ## Timeout for HTTP requests
-  timeout = "5s"
-
-  ## Optional HTTP Basic Auth credentials
   # username = "username"
   # password = "pa$$word"
 
-  ## Optional TLS Config
+  ## Optional TLS Config.
   # tls_ca = "/etc/telegraf/ca.pem"
   # tls_cert = "/etc/telegraf/cert.pem"
   # tls_key = "/etc/telegraf/key.pem"
 
-  ## Use TLS but skip chain & host verification
+  ## Use TLS but skip chain & host verification.
   # insecure_skip_verify = false
+
+  ## Optional HTTP headers.
+  # [inputs.logstash.headers]
+  #   "X-Special-Header" = "Special-Value"
 `
 
 type Logstash struct {
 	URL string `toml:"url"`
 
-	MultiPipeline         bool `toml:"multi_pipeline"`
+	SinglePipeline bool     `toml:"single_pipeline"`
-	CollectProcessStats   bool `toml:"collect_process_stats"`
+	Collect        []string `toml:"collect"`
-	CollectJVMStats       bool `toml:"collect_jvm_stats"`
-	CollectPipelinesStats bool `toml:"collect_pipelines_stats"`
-	CollectPluginsStats   bool `toml:"collect_plugins_stats"`
-	CollectQueueStats     bool `toml:"collect_queue_stats"`
 
 	Username string            `toml:"username"`
 	Password string            `toml:"password"`
-	Method     string            `toml:"method"`
 	Headers  map[string]string `toml:"headers"`
-	HostHeader string            `toml:"host_header"`
 	Timeout  internal.Duration `toml:"timeout"`
-
 	tls.ClientConfig
+
 	client *http.Client
 }
 
@@ -90,26 +67,13 @@ type Logstash struct {
 func NewLogstash() *Logstash {
 	return &Logstash{
 		URL:            "http://127.0.0.1:9600",
-		MultiPipeline:         true,
+		SinglePipeline: false,
-		CollectProcessStats:   true,
+		Collect:        []string{"pipelines", "process", "jvm"},
-		CollectJVMStats:       true,
-		CollectPipelinesStats: true,
-		CollectPluginsStats:   true,
-		CollectQueueStats:     true,
-		Method:                "GET",
 		Headers:        make(map[string]string),
-		HostHeader:            "",
 		Timeout:        internal.Duration{Duration: time.Second * 5},
 	}
 }
 
-// init initialise this plugin instance
-func init() {
-	inputs.Add("logstash", func() telegraf.Input {
-		return NewLogstash()
-	})
-}
-
 // Description returns short info about plugin
 func (logstash *Logstash) Description() string {
 	return "Read metrics exposed by Logstash"
@@ -183,6 +147,14 @@ const processStats = "/_node/stats/process"
 const pipelinesStats = "/_node/stats/pipelines"
 const pipelineStats = "/_node/stats/pipeline"
 
+func (i *Logstash) Init() error {
+	err := choice.CheckSlice(i.Collect, []string{"pipelines", "process", "jvm"})
+	if err != nil {
+		return fmt.Errorf(`cannot verify "collect" setting: %v`, err)
+	}
+	return nil
+}
+
 // createHttpClient create a clients to access API
 func (logstash *Logstash) createHttpClient() (*http.Client, error) {
 	tlsConfig, err := logstash.ClientConfig.TLSConfig()
@@ -202,15 +174,7 @@ func (logstash *Logstash) createHttpClient() (*http.Client, error) {
 
 // gatherJsonData query the data source and parse the response JSON
 func (logstash *Logstash) gatherJsonData(url string, value interface{}) error {
-
+	request, err := http.NewRequest("GET", url, nil)
-	var method string
-	if logstash.Method != "" {
-		method = logstash.Method
-	} else {
-		method = "GET"
-	}
-
-	request, err := http.NewRequest(method, url, nil)
 	if err != nil {
 		return err
 	}
@@ -218,11 +182,13 @@ func (logstash *Logstash) gatherJsonData(url string, value interface{}) error {
 	if (logstash.Username != "") || (logstash.Password != "") {
 		request.SetBasicAuth(logstash.Username, logstash.Password)
 	}
+
 	for header, value := range logstash.Headers {
+		if strings.ToLower(header) == "host" {
+			request.Host = value
+		} else {
 			request.Header.Add(header, value)
 		}
-	if logstash.HostHeader != "" {
-		request.Host = logstash.HostHeader
 	}
 
 	response, err := logstash.client.Do(request)
@@ -252,8 +218,8 @@ func (logstash *Logstash) gatherJVMStats(url string, accumulator telegraf.Accumu
 	tags := map[string]string{
 		"node_id":      jvmStats.ID,
 		"node_name":    jvmStats.Name,
-		"node_host":    jvmStats.Host,
 		"node_version": jvmStats.Version,
+		"source":       jvmStats.Host,
 	}
 
 	flattener := jsonParser.JSONFlattener{}
@@ -278,8 +244,8 @@ func (logstash *Logstash) gatherProcessStats(url string, accumulator telegraf.Ac
 	tags := map[string]string{
 		"node_id":      processStats.ID,
 		"node_name":    processStats.Name,
-		"node_host":    processStats.Host,
 		"node_version": processStats.Version,
+		"source":       processStats.Host,
 	}
 
 	flattener := jsonParser.JSONFlattener{}
@@ -368,8 +334,8 @@ func (logstash *Logstash) gatherPipelineStats(url string, accumulator telegraf.A
 	tags := map[string]string{
 		"node_id":      pipelineStats.ID,
 		"node_name":    pipelineStats.Name,
-		"node_host":    pipelineStats.Host,
 		"node_version": pipelineStats.Version,
+		"source":       pipelineStats.Host,
 	}
 
 	flattener := jsonParser.JSONFlattener{}
@@ -379,7 +345,6 @@ func (logstash *Logstash) gatherPipelineStats(url string, accumulator telegraf.A
 	}
 	accumulator.AddFields("logstash_events", flattener.Fields, tags)
 
-	if logstash.CollectPluginsStats {
 	err = logstash.gatherPluginsStats(pipelineStats.Pipeline.Plugins.Inputs, "input", tags, accumulator)
 	if err != nil {
 		return err
@@ -392,10 +357,10 @@ func (logstash *Logstash) gatherPipelineStats(url string, accumulator telegraf.A
 	if err != nil {
 		return err
 	}
-	}
 
-	if logstash.CollectQueueStats {
 	err = logstash.gatherQueueStats(&pipelineStats.Pipeline.Queue, tags, accumulator)
+	if err != nil {
+		return err
 	}
 
 	return nil
@@ -414,9 +379,9 @@ func (logstash *Logstash) gatherPipelinesStats(url string, accumulator telegraf.
 		tags := map[string]string{
 			"node_id":      pipelinesStats.ID,
 			"node_name":    pipelinesStats.Name,
-			"node_host":    pipelinesStats.Host,
 			"node_version": pipelinesStats.Version,
 			"pipeline":     pipelineName,
+			"source":       pipelinesStats.Host,
 		}
 
 		flattener := jsonParser.JSONFlattener{}
@@ -426,7 +391,6 @@ func (logstash *Logstash) gatherPipelinesStats(url string, accumulator telegraf.
 		}
 		accumulator.AddFields("logstash_events", flattener.Fields, tags)
 
-		if logstash.CollectPluginsStats {
 		err = logstash.gatherPluginsStats(pipeline.Plugins.Inputs, "input", tags, accumulator)
 		if err != nil {
 			return err
@@ -439,12 +403,11 @@ func (logstash *Logstash) gatherPipelinesStats(url string, accumulator telegraf.
 		if err != nil {
 			return err
 		}
-		}
 
-		if logstash.CollectQueueStats {
 		err = logstash.gatherQueueStats(&pipeline.Queue, tags, accumulator)
+		if err != nil {
+			return err
 		}
-
 	}
 
 	return nil
@@ -452,7 +415,6 @@ func (logstash *Logstash) gatherPipelinesStats(url string, accumulator telegraf.
 
 // Gather ask this plugin to start gathering metrics
 func (logstash *Logstash) Gather(accumulator telegraf.Accumulator) error {
-
 	if logstash.client == nil {
 		client, err := logstash.createHttpClient()
 
@@ -462,7 +424,7 @@ func (logstash *Logstash) Gather(accumulator telegraf.Accumulator) error {
 		logstash.client = client
 	}
 
-	if logstash.CollectJVMStats {
+	if choice.Contains("jvm", logstash.Collect) {
 		jvmUrl, err := url.Parse(logstash.URL + jvmStats)
 		if err != nil {
 			return err
@@ -472,7 +434,7 @@ func (logstash *Logstash) Gather(accumulator telegraf.Accumulator) error {
 		}
 	}
 
-	if logstash.CollectProcessStats {
+	if choice.Contains("process", logstash.Collect) {
 		processUrl, err := url.Parse(logstash.URL + processStats)
 		if err != nil {
 			return err
@@ -482,16 +444,8 @@ func (logstash *Logstash) Gather(accumulator telegraf.Accumulator) error {
 		}
 	}
 
-	if logstash.CollectPipelinesStats {
+	if choice.Contains("pipelines", logstash.Collect) {
-		if logstash.MultiPipeline {
+		if logstash.SinglePipeline {
-			pipelinesUrl, err := url.Parse(logstash.URL + pipelinesStats)
-			if err != nil {
-				return err
-			}
-			if err := logstash.gatherPipelinesStats(pipelinesUrl.String(), accumulator); err != nil {
-				return err
-			}
-		} else {
 			pipelineUrl, err := url.Parse(logstash.URL + pipelineStats)
 			if err != nil {
 				return err
@@ -499,8 +453,23 @@ func (logstash *Logstash) Gather(accumulator telegraf.Accumulator) error {
 			if err := logstash.gatherPipelineStats(pipelineUrl.String(), accumulator); err != nil {
 				return err
 			}
+		} else {
+			pipelinesUrl, err := url.Parse(logstash.URL + pipelinesStats)
+			if err != nil {
+				return err
+			}
+			if err := logstash.gatherPipelinesStats(pipelinesUrl.String(), accumulator); err != nil {
+				return err
+			}
 		}
 	}
 
 	return nil
 }
+
+// init registers this plugin instance
+func init() {
+	inputs.Add("logstash", func() telegraf.Input {
+		return NewLogstash()
+	})
+}

plugins/inputs/logstash/logstash_test.go

@@ -9,7 +9,6 @@ import (
 	"testing"
 
 	"github.com/influxdata/telegraf/testutil"
-	"github.com/stretchr/testify/assert"
 )
 
 var logstashTest = NewLogstash()
@@ -66,7 +65,7 @@ func Test_Logstash5GatherProcessStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("a360d8cf-6289-429d-8419-6145e324b574"),
 			"node_name":    string("node-5-test"),
-			"node_host":    string("node-5"),
+			"source":       string("node-5"),
 			"node_version": string("5.3.0"),
 		},
 	)
@@ -115,7 +114,7 @@ func Test_Logstash6GatherProcessStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 		},
 	)
@@ -160,7 +159,7 @@ func Test_Logstash5GatherPipelineStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("a360d8cf-6289-429d-8419-6145e324b574"),
 			"node_name":    string("node-5-test"),
-			"node_host":    string("node-5"),
+			"source":       string("node-5"),
 			"node_version": string("5.3.0"),
 		},
 	)
@@ -176,7 +175,7 @@ func Test_Logstash5GatherPipelineStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("a360d8cf-6289-429d-8419-6145e324b574"),
 			"node_name":    string("node-5-test"),
-			"node_host":    string("node-5"),
+			"source":       string("node-5"),
 			"node_version": string("5.3.0"),
 			"plugin_name":  string("beats"),
 			"plugin_id":    string("a35197a509596954e905e38521bae12b1498b17d-1"),
@@ -195,7 +194,7 @@ func Test_Logstash5GatherPipelineStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("a360d8cf-6289-429d-8419-6145e324b574"),
 			"node_name":    string("node-5-test"),
-			"node_host":    string("node-5"),
+			"source":       string("node-5"),
 			"node_version": string("5.3.0"),
 			"plugin_name":  string("stdout"),
 			"plugin_id":    string("582d5c2becb582a053e1e9a6bcc11d49b69a6dfd-2"),
@@ -214,7 +213,7 @@ func Test_Logstash5GatherPipelineStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("a360d8cf-6289-429d-8419-6145e324b574"),
 			"node_name":    string("node-5-test"),
-			"node_host":    string("node-5"),
+			"source":       string("node-5"),
 			"node_version": string("5.3.0"),
 			"plugin_name":  string("s3"),
 			"plugin_id":    string("582d5c2becb582a053e1e9a6bcc11d49b69a6dfd-3"),
@@ -264,7 +263,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 		},
@@ -281,7 +280,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("kafka"),
@@ -301,7 +300,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("mutate"),
@@ -321,7 +320,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("mutate"),
@@ -341,7 +340,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("date"),
@@ -361,7 +360,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("mutate"),
@@ -381,7 +380,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("mutate"),
@@ -401,7 +400,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("drop"),
@@ -421,7 +420,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("mutate"),
@@ -441,7 +440,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("csv"),
@@ -461,7 +460,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("mutate"),
@@ -481,7 +480,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("elasticsearch"),
@@ -501,7 +500,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("kafka"),
@@ -521,7 +520,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"plugin_name":  string("kafka"),
@@ -544,7 +543,7 @@ func Test_Logstash6GatherPipelinesStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 			"pipeline":     string("main"),
 			"queue_type":   string("persisted"),
@@ -615,7 +614,7 @@ func Test_Logstash5GatherJVMStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("a360d8cf-6289-429d-8419-6145e324b574"),
 			"node_name":    string("node-5-test"),
-			"node_host":    string("node-5"),
+			"source":       string("node-5"),
 			"node_version": string("5.3.0"),
 		},
 	)
@@ -684,43 +683,9 @@ func Test_Logstash6GatherJVMStats(test *testing.T) {
 		map[string]string{
 			"node_id":      string("3044f675-21ce-4335-898a-8408aa678245"),
 			"node_name":    string("node-6-test"),
-			"node_host":    string("node-6"),
+			"source":       string("node-6"),
 			"node_version": string("6.4.2"),
 		},
 	)
 
 }
-
-func Test_LogstashRequests(test *testing.T) {
-	fakeServer := httptest.NewUnstartedServer(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
-		writer.Header().Set("Content-Type", "application/json")
-		fmt.Fprintf(writer, "%s", string(logstash6JvmJSON))
-		assert.Equal(test, request.Host, "logstash.test.local")
-		assert.Equal(test, request.Method, "POST")
-		assert.Equal(test, request.Header.Get("X-Test"), "test-header")
-	}))
-	requestURL, err := url.Parse(logstashTest.URL)
-	if err != nil {
-		test.Logf("Can't connect to: %s", logstashTest.URL)
-	}
-	fakeServer.Listener, _ = net.Listen("tcp", fmt.Sprintf("%s:%s", requestURL.Hostname(), requestURL.Port()))
-	fakeServer.Start()
-	defer fakeServer.Close()
-
-	if logstashTest.client == nil {
-		client, err := logstashTest.createHttpClient()
-
-		if err != nil {
-			test.Logf("Can't createHttpClient")
-		}
-		logstashTest.client = client
-	}
-
-	logstashTest.Method = "POST"
-	logstashTest.Headers["X-Test"] = "test-header"
-	logstashTest.HostHeader = "logstash.test.local"
-
-	if err := logstashTest.gatherJsonData(logstashTest.URL+jvmStats, &logstash6accJVMStats); err != nil {
-		test.Logf("Can't gather JVM stats")
-	}
-}