Template Processor Plugin
This plugin applies templates to metrics for generating a new tag. The primary use case of this plugin is to create a tag that can be used for dynamic routing to multiple output plugins or using an output specific routing option.
The template has access to each metric’s measurement name, tags, fields, and timestamp. Templates follow the Go Template syntax and may contain Sprig functions.
Introduced in: Telegraf v1.14.0 Tags: transformation OS support: all
Global configuration options
Plugins support additional global and plugin configuration settings for tasks such as modifying metrics, tags, and fields, creating aliases, and configuring plugin ordering. See CONFIGURATION.md for more details.
Configuration
# Uses a Go template to create a new tag
[[processors.template]]
## Go template used to create the tag name of the output. In order to
## ease TOML escaping requirements, you should use single quotes around
## the template string.
tag = "topic"
## Go template used to create the tag value of the output. In order to
## ease TOML escaping requirements, you should use single quotes around
## the template string.
template = '{{ .Tag "hostname" }}.{{ .Tag "level" }}'Examples
Combine multiple tags to create a single tag
[[processors.template]]
tag = "topic"
template = '{{ .Tag "hostname" }}.{{ .Tag "level" }}'- cpu,level=debug,hostname=localhost time_idle=42
+ cpu,level=debug,hostname=localhost,topic=localhost.debug time_idle=42
Use a field value as tag name
[[processors.template]]
tag = '{{ .Field "type" }}'
template = '{{ .Name }}'- cpu,level=debug,hostname=localhost time_idle=42,type=sensor
+ cpu,level=debug,hostname=localhost,sensor=cpu time_idle=42,type=sensor
Add measurement name as a tag
[[processors.template]]
tag = "measurement"
template = '{{ .Name }}'- cpu,hostname=localhost time_idle=42
+ cpu,hostname=localhost,measurement=cpu time_idle=42
Add the year as a tag, similar to the date processor
[[processors.template]]
tag = "year"
template = '{{.Time.UTC.Year}}'Add all fields as a tag
Sometimes it is useful to pass all fields with their values into a single
message for sending it to a monitoring system (e.g. Syslog, GroundWork), then
you can use .Fields or .Tags:
[[processors.template]]
tag = "message"
template = 'Message about {{.Name}} fields: {{.Fields}}'- cpu,hostname=localhost time_idle=42
+ cpu,hostname=localhost,message=Message\ about\ cpu\ fields:\ map[time_idle:42] time_idle=42
More advanced example, which might make more sense:
[[processors.template]]
tag = "message"
template = '''Message about {{.Name}} fields:
{{ range $field, $value := .Fields -}}
{{$field}}:{{$value}}
{{ end }}'''- cpu,hostname=localhost time_idle=42
+ cpu,hostname=localhost,message=Message\ about\ cpu\ fields:\ntime_idle:42\n time_idle=42
Just add the current metric as a tag
[[processors.template]]
tag = "metric"
template = '{{.}}'- cpu,hostname=localhost time_idle=42
+ cpu,hostname=localhost,metric=cpu\ map[hostname:localhost]\ map[time_idle:42]\ 1257894000000000000 time_idle=42
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