69 lines
2.5 KiB
Markdown
69 lines
2.5 KiB
Markdown
# Multifile Input Plugin
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The multifile input plugin allows Telegraf to combine data from multiple files
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into a single metric, creating one field or tag per file. This is often
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useful creating custom metrics from the `/sys` or `/proc` filesystems.
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> Note: If you wish to parse metrics from a single file formatted in one of the supported
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> [input data formats][], you should use the [file][] input plugin instead.
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### Configuration
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```toml
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[[inputs.multifile]]
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## Base directory where telegraf will look for files.
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## Omit this option to use absolute paths.
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base_dir = "/sys/bus/i2c/devices/1-0076/iio:device0"
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## If true discard all data when a single file can't be read.
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## Else, Telegraf omits the field generated from this file.
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# fail_early = true
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## Files to parse each interval.
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[[inputs.multifile.file]]
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file = "in_pressure_input"
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dest = "pressure"
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conversion = "float"
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[[inputs.multifile.file]]
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file = "in_temp_input"
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dest = "temperature"
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conversion = "float(3)"
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[[inputs.multifile.file]]
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file = "in_humidityrelative_input"
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dest = "humidityrelative"
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conversion = "float(3)"
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```
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Each file table can contain the following options:
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* `file`:
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Path of the file to be parsed, relative to the `base_dir`.
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* `dest`:
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Name of the field/tag key, defaults to `$(basename file)`.
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* `conversion`:
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Data format used to parse the file contents:
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* `float(X)`: Converts the input value into a float and divides by the Xth power of 10. Efficively just moves the decimal left X places. For example a value of `123` with `float(2)` will result in `1.23`.
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* `float`: Converts the value into a float with no adjustment. Same as `float(0)`.
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* `int`: Convertes the value into an integer.
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* `string`, `""`: No conversion.
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* `bool`: Convertes the value into a boolean.
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* `tag`: File content is used as a tag.
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### Example Output
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This example shows a BME280 connected to a Raspberry Pi, using the sample config.
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```
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multifile pressure=101.343285156,temperature=20.4,humidityrelative=48.9 1547202076000000000
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```
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To reproduce this, connect a BMP280 to the board's GPIO pins and register the BME280 device driver
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```
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cd /sys/bus/i2c/devices/i2c-1
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echo bme280 0x76 > new_device
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```
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The kernel driver provides the following files in `/sys/bus/i2c/devices/1-0076/iio:device0`:
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* `in_humidityrelative_input`: `48900`
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* `in_pressure_input`: `101.343285156`
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* `in_temp_input`: `20400`
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[input data formats]: /docs/DATA_FORMATS_INPUT.md
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[file]: /plugins/inputs/file/README.md
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