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Added response_timeout property to prometheus input plugin #2006

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Added response_timeout property to prometheus input plugin #2006

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puckpuck
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@puckpuck puckpuck commented Nov 7, 2016

Required for all PRs:

  • CHANGELOG.md updated (we recommend not updating this until the PR has been approved by a maintainer)
  • Sign CLA (if not already signed)
  • README.md updated (if adding a new plugin)

While working with a customer to setup monitoring, leveraging their existing Prometheus endpoints to gather metrics, we were getting numerous timeout errors in the logs. Upon further investigation, the prometheus input plugin has a 3 second timeout hard coded. The issue is that some of the prometheus endpoints were taking much longer than 3 seconds to return all available metrics. We converted this to a configuration property, with a default value of 3 seconds, which ultimately solved the problem.

Since the default is still 3 seconds, this should be a non-breaking change.

@puckpuck puckpuck changed the title Added response_timeout property Added response_timeout property to prometheus input plugin Nov 7, 2016
@puckpuck puckpuck added this to the 1.2.0 milestone Nov 7, 2016
@@ -21,6 +21,8 @@ type Prometheus struct {
// Bearer Token authorization file path
BearerToken string `toml:"bearer_token"`

ResponseTimeout int `toml:"response_timeout"`
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make ResponseTimeout an internal.Duration type

@@ -38,6 +40,9 @@ var sampleConfig = `
## Use bearer token for authorization
# bearer_token = /path/to/bearer/token

## Specify timeout in seconds for slower prometheus clients (default is 3)
# response_timeout = 3
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once ResponseTimeout is an internal.Duration type, it can be written as response_timeout = "3s"

@sparrc sparrc closed this in f09c08d Dec 17, 2016
@puckpuck puckpuck deleted the prometheus-timeout branch December 21, 2016 18:50
njwhite pushed a commit to njwhite/telegraf that referenced this pull request Jan 31, 2017
maxunt pushed a commit that referenced this pull request Jun 26, 2018
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2 participants