gistfile1.txt

# ConfigMap here with both files
#################################
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: fluentbit-dedot-lua
data:
  dedot.conf: |2

    [FILTER]
        Name    lua
        Match   kube.*
        script  /dedot-lua/dedot.lua
        call    dedot
  dedot.lua: |2

    function dedot(tag, timestamp, record)
        if record["kubernetes"] == nil then
            return 0, 0, 0
        end
        dedot_keys(record["kubernetes"]["annotations"])
        dedot_keys(record["kubernetes"]["labels"])
        return 1, timestamp, record
    end

    function dedot_keys(map)
        if map == nil then
            return
        end
        local new_map = {}
        local changed_keys = {}
        for k, v in pairs(map) do
            local deslashed = string.gsub(k, "%/", "_")
            local dedotted = string.gsub(deslashed, "%.", "_")
            if dedotted ~= k then
                new_map[dedotted] = v
                changed_keys[k] = true
            end
        end
        for k in pairs(changed_keys) do
            map[k] = nil
        end
        for k, v in pairs(new_map) do
            map[k] = v
        end
    end


# Important fluent-bit chart values not to miss
################################################

    extraVolumes:
      - name: dedot-lua
        configMap:
          name: fluentbit-dedot-lua

    extraVolumeMounts:
      - name: dedot-lua
        mountPath: /dedot-lua
        
    rawConfig: |-
      @INCLUDE fluent-bit-service.conf
      @INCLUDE fluent-bit-input.conf
      @INCLUDE fluent-bit-filter.conf
      @INCLUDE /dedot-lua/dedot.conf  # this one was added
      @INCLUDE fluent-bit-output.conf