Allow input plugin to be run on start

[lucassardois]

Feature Request

Allow Telegraf inputs plugins to be run on start

Proposal:

Allow Telegraf inputs plugins to be run on start trough a new configuration attribute onstart which default to false, but when set to true would run the input plugin after Telegraf has started.

Current behavior:

Input plugins are run every interval or round_interval.

Desired behavior:

I want the input plugin to be run right after Telegraf start.

Use case:

I fetch an HTTP API every 3 hours thanks to the http plugin. This fetch then insert the resulting data in InfluxDB. I want to be able to run the first fetch right after Telegraf start so my database will directly have data and clients don't need to wait 3 hours before querying InfluxDB.

[Hipska]

Doesn't setting the round_interval to false already do that?

Otherwise, you could shedule this collection with a cron job every 3 hours with the --once parameter..

[sjwang90]

@lucassardois - if you set round_interval = false as hipska mentioned your Telegraf will run and collect right away and continue collecting every 3 hours from there.

[Hipska]

The #10545 might also interest you.