Add support for ES 7.x to elasticsearch output (#6053)
This commit is contained in:
Leandro Piccilli
Daniel Nelson
parent
234a946093
commit
5bad2c3a43
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@ -24,12 +24,13 @@ services:
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depends_on:
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- zookeeper
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elasticsearch:
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image: elasticsearch:5
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image: docker.elastic.co/elasticsearch/elasticsearch:7.2.0
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environment:
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- JAVA_OPTS="-Xms256m -Xmx256m"
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- "ES_JAVA_OPTS=-Xms256m -Xmx256m"
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- discovery.type=single-node
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- xpack.security.enabled=false
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ports:
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- "9200:9200"
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- "9300:9300"
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mysql:
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image: mysql
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environment:
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@ -1,8 +1,8 @@
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## Elasticsearch Output Plugin for Telegraf
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# Elasticsearch Output Plugin for Telegraf
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This plugin writes to [Elasticsearch](https://www.elastic.co) via HTTP using Elastic (http://olivere.github.io/elastic/).
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This plugin writes to [Elasticsearch](https://www.elastic.co) via HTTP using Elastic (<http://olivere.github.io/elastic/).>
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Currently it only supports Elasticsearch 5.x series.
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It supports Elasticsearch releases from 5.x up to 7.x.
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## Elasticsearch indexes and templates
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@ -22,7 +22,7 @@ For more information on how this works, see https://www.elastic.co/guide/en/elas
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This plugin can create a working template for use with telegraf metrics. It uses Elasticsearch dynamic templates feature to set proper types for the tags and metrics fields.
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If the template specified already exists, it will not overwrite unless you configure this plugin to do so. Thus you can customize this template after its creation if necessary.
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Example of an index template created by telegraf:
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Example of an index template created by telegraf on Elasticsearch 5.x:
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```json
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{
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@ -35,6 +35,8 @@ Example of an index template created by telegraf:
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"limit": "5000"
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}
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},
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"auto_expand_replicas" : "0-1",
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"codec" : "best_compression",
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"refresh_interval": "10s"
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}
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},
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@ -159,7 +161,7 @@ This plugin will format the events in the following way:
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## Set the interval to check if the Elasticsearch nodes are available
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## Setting to "0s" will disable the health check (not recommended in production)
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health_check_interval = "10s"
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## HTTP basic authentication details (eg. when using Shield)
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## HTTP basic authentication details
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# username = "telegraf"
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# password = "mypassword"
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@ -209,6 +211,7 @@ This plugin will format the events in the following way:
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%H - hour (00..23)
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%V - week of the year (ISO week) (01..53)
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```
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Additionally, you can specify dynamic index names by using tags with the notation ```{{tag_name}}```. This will store the metrics with different tag values in different indices. If the tag does not exist in a particular metric, the `default_tag_value` will be used instead.
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### Optional parameters:
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@ -1,12 +1,14 @@
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package elasticsearch
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import (
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"bytes"
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"context"
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"fmt"
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"log"
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"net/http"
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"strconv"
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"strings"
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"text/template"
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"time"
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"github.com/influxdata/telegraf"
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@ -29,6 +31,7 @@ type Elasticsearch struct {
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ManageTemplate bool
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TemplateName string
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OverwriteTemplate bool
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MajorReleaseNumber int
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tls.ClientConfig
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Client *elastic.Client
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@ -47,7 +50,7 @@ var sampleConfig = `
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## Set the interval to check if the Elasticsearch nodes are available
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## Setting to "0s" will disable the health check (not recommended in production)
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health_check_interval = "10s"
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## HTTP basic authentication details (eg. when using Shield)
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## HTTP basic authentication details
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# username = "telegraf"
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# password = "mypassword"
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@ -85,6 +88,81 @@ var sampleConfig = `
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overwrite_template = false
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`
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const telegrafTemplate = `
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{
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{{ if (lt .Version 6) }}
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"template": "{{.TemplatePattern}}",
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{{ else }}
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"index_patterns" : [ "{{.TemplatePattern}}" ],
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{{ end }}
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"settings": {
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"index": {
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"refresh_interval": "10s",
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"mapping.total_fields.limit": 5000,
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"auto_expand_replicas" : "0-1",
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"codec" : "best_compression"
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}
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},
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"mappings" : {
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{{ if (lt .Version 7) }}
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"metrics" : {
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{{ if (lt .Version 6) }}
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"_all": { "enabled": false },
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{{ end }}
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{{ end }}
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"properties" : {
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"@timestamp" : { "type" : "date" },
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"measurement_name" : { "type" : "keyword" }
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},
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"dynamic_templates": [
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{
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"tags": {
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"match_mapping_type": "string",
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"path_match": "tag.*",
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"mapping": {
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"ignore_above": 512,
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"type": "keyword"
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}
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}
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},
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{
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"metrics_long": {
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"match_mapping_type": "long",
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"mapping": {
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"type": "float",
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"index": false
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}
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}
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},
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{
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"metrics_double": {
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"match_mapping_type": "double",
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"mapping": {
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"type": "float",
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"index": false
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}
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}
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},
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{
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"text_fields": {
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"match": "*",
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"mapping": {
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"norms": false
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}
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}
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}
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]
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{{ if (lt .Version 7) }}
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}
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{{ end }}
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}
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}`
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type templatePart struct {
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TemplatePattern string
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Version int
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}
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func (a *Elasticsearch) Connect() error {
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if a.URLs == nil || a.IndexName == "" {
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return fmt.Errorf("Elasticsearch urls or index_name is not defined")
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@ -142,14 +220,15 @@ func (a *Elasticsearch) Connect() error {
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}
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// quit if ES version is not supported
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i, err := strconv.Atoi(strings.Split(esVersion, ".")[0])
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if err != nil || i < 5 {
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majorReleaseNumber, err := strconv.Atoi(strings.Split(esVersion, ".")[0])
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if err != nil || majorReleaseNumber < 5 {
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return fmt.Errorf("Elasticsearch version not supported: %s", esVersion)
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}
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log.Println("I! Elasticsearch version: " + esVersion)
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a.Client = client
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a.MajorReleaseNumber = majorReleaseNumber
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if a.ManageTemplate {
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err := a.manageTemplate(ctx)
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@ -184,10 +263,13 @@ func (a *Elasticsearch) Write(metrics []telegraf.Metric) error {
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m["tag"] = metric.Tags()
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m[name] = metric.Fields()
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bulkRequest.Add(elastic.NewBulkIndexRequest().
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Index(indexName).
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Type("metrics").
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Doc(m))
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br := elastic.NewBulkIndexRequest().Index(indexName).Doc(m)
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if a.MajorReleaseNumber <= 6 {
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br.Type("metrics")
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}
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bulkRequest.Add(br)
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}
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@ -237,65 +319,16 @@ func (a *Elasticsearch) manageTemplate(ctx context.Context) error {
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}
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if (a.OverwriteTemplate) || (!templateExists) || (templatePattern != "") {
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// Create or update the template
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tmpl := fmt.Sprintf(`
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{
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"template":"%s",
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"settings": {
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"index": {
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"refresh_interval": "10s",
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"mapping.total_fields.limit": 5000
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}
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},
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"mappings" : {
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"_default_" : {
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"_all": { "enabled": false },
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"properties" : {
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"@timestamp" : { "type" : "date" },
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"measurement_name" : { "type" : "keyword" }
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},
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"dynamic_templates": [
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{
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"tags": {
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"match_mapping_type": "string",
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"path_match": "tag.*",
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"mapping": {
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"ignore_above": 512,
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"type": "keyword"
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}
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}
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},
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{
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"metrics_long": {
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"match_mapping_type": "long",
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"mapping": {
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"type": "float",
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"index": false
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}
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}
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},
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{
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"metrics_double": {
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"match_mapping_type": "double",
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"mapping": {
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"type": "float",
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"index": false
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}
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}
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},
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{
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"text_fields": {
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"match": "*",
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"mapping": {
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"norms": false
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}
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}
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}
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]
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}
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}
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}`, templatePattern+"*")
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_, errCreateTemplate := a.Client.IndexPutTemplate(a.TemplateName).BodyString(tmpl).Do(ctx)
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tp := templatePart{
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TemplatePattern: templatePattern + "*",
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Version: a.MajorReleaseNumber,
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}
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t := template.Must(template.New("template").Parse(telegrafTemplate))
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var tmpl bytes.Buffer
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t.Execute(&tmpl, tp)
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_, errCreateTemplate := a.Client.IndexPutTemplate(a.TemplateName).BodyString(tmpl.String()).Do(ctx)
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if errCreateTemplate != nil {
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return fmt.Errorf("Elasticsearch failed to create index template %s : %s", a.TemplateName, errCreateTemplate)
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