# Lookup a key derived from metrics in a static file
[[processors.lookup]]
  ## List of files containing the lookup-table
  files = ["path/to/lut.json", "path/to/another_lut.json"]

  ## Format of the lookup file(s)
  ## Available formats are:
  ##    json               -- JSON file with 'key: {tag-key: tag-value, ...}' mapping
  ##    csv_key_name_value -- CSV file with 'key,tag-key,tag-value,...,tag-key,tag-value' mapping
  ##    csv_key_values     -- CSV file with a header containing tag-names and
  ##                          rows with 'key,tag-value,...,tag-value' mappings
  # format = "json"

  ## Template for generating the lookup-key from the metric.
  ## This is a Golang template (see https://pkg.go.dev/text/template) to
  ## access the metric name (`{{.Name}}`), a tag value (`{{.Tag "name"}}`) or
  ## a field value (`{{.Field "name"}}`).
  key = '{{.Tag "host"}}'