# Customization

You can build customized versions of Telegraf with a specific plugin set
using [build-tags](https://pkg.go.dev/cmd/go#hdr-Build_constraints).
The plugins can be selected either category-wise, i.e. `inputs`, `outputs`,
`processors`, `aggregators` and `parsers` or individually, e.g. `inputs.modbus`
or `outputs.influxdb`.

Usually the build tags correspond to the plugin names used in the Telegraf
configuration. To be sure, check the files in the corresponding
`plugin/<category>/all` directory. Make sure to include all parsers you intend
to use.

__Note:__ You _always_ need to include the `custom` tag when customizing the
build as otherwise _all_ plugins will be selected regardless of other tags.

## Via make

When using the project's makefile, the build can be customized via the
`BUILDTAGS` environment variable containing a __space-separated__ list of the
selected plugins (or categories) __and__ the `custom` tag.

For example

```shell
BUILDTAGS="custom inputs outputs.influxdb_v2 parsers.json" make
```

will build a customized Telegraf including _all_ `inputs`, the InfluxDB v2
`output` and the `json` parser.

## Via `go build`

If you wish to build Telegraf using native go tools, you can use the `go build`
command with the `-tags` option. Specify  a __space-separated__ list of the
selected plugins (or categories) __and__ the `custom` tag as argument.

For example

```shell
go build -tags "custom inputs outputs.influxdb_v2 parsers.json" ./cmd/telegraf
```

will build a customized Telegraf including _all_ `inputs`, the InfluxDB v2
`output` and the `json` parser.