support multiple [outputs.influxdb] or multiple database names in one [outputs.influxdb]

[wei-hai]

Feature Request

Proposal:

support multiple [outputs.influxdb] or multiple databases in [outputs.influxdb] so that different input can write data to different database, for example, inputs.statsd can write data into statsd_db and inputs.docker can write data into database docker_db

Current behavior:

no way to do it unless you run multiple telegraf instances

Desired behavior:

one telegraf instance can inject data from different inputs into different databases in influxdb

Use case:

inputs.statsd supports template so user can name the measurement, if the measurement has the same name as other one created by different input then this measurement will be messy

[phemmer]

See #1778, which has a few suggestions of how you can accomplish this.

[sparrc]

@wei-hai if you put two brackets around it, multiple [[outputs.influxdb]] is already supported. see https://github.com/influxdata/telegraf/blob/master/docs/CONFIGURATION.md#output-configuration-examples