76 lines
2.3 KiB
Markdown
76 lines
2.3 KiB
Markdown
# Prometheus Input Plugin
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The prometheus input plugin gathers metrics from any webpage
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exposing metrics with Prometheus format
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### Configuration:
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Example for Kubernetes apiserver
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```toml
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# Get all metrics from Kube-apiserver
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[[inputs.prometheus]]
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# An array of urls to scrape metrics from.
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urls = ["http://my-kube-apiserver:8080/metrics"]
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```
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You can use more complex configuration
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to filter and some tags
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```toml
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# Get all metrics from Kube-apiserver
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[[inputs.prometheus]]
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# An array of urls to scrape metrics from.
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urls = ["http://my-kube-apiserver:8080/metrics"]
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# Get only metrics with "apiserver_" string is in metric name
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namepass = ["apiserver_*"]
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# Add a metric name prefix
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name_prefix = "k8s_"
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# Add tags to be able to make beautiful dashboards
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[inputs.prometheus.tags]
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kubeservice = "kube-apiserver"
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```
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### Measurements & Fields & Tags:
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Measurements and fields could be any thing.
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It just depends of what you're quering.
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Example:
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```
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# HELP go_gc_duration_seconds A summary of the GC invocation durations.
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# TYPE go_gc_duration_seconds summary
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go_gc_duration_seconds{quantile="0"} 0.00010425500000000001
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go_gc_duration_seconds{quantile="0.25"} 0.000139108
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go_gc_duration_seconds{quantile="0.5"} 0.00015749400000000002
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go_gc_duration_seconds{quantile="0.75"} 0.000331463
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go_gc_duration_seconds{quantile="1"} 0.000667154
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go_gc_duration_seconds_sum 0.0018183950000000002
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go_gc_duration_seconds_count 7
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# HELP go_goroutines Number of goroutines that currently exist.
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# TYPE go_goroutines gauge
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go_goroutines 15
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```
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- go_goroutines,
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- gauge (integer, unit)
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- go_gc_duration_seconds
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- field3 (integer, bytes)
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- All measurements have the following tags:
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- url=http://my-kube-apiserver:8080/metrics
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- go_goroutines has the following tags:
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- kubeservice=kube-apiserver
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- go_gc_duration_seconds has the following tags:
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- kubeservice=kube-apiserver
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### Example Output:
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Example of output with configuration given above:
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```
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$ ./telegraf -config telegraf.conf -test
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k8s_go_goroutines,kubeservice=kube-apiserver,url=http://my-kube-apiserver:8080/metrics gauge=536 1456857329391929813
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k8s_go_gc_duration_seconds,kubeservice=kube-apiserver,url=http://my-kube-apiserver:8080/metrics 0=0.038002142,0.25=0.041732467,0.5=0.04336492,0.75=0.047271799,1=0.058295811,count=0,sum=208.334617406 1456857329391929813
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```
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