add grok as a top level parser, still need README

plugins/inputs/reader/reader.go

@@ -13,19 +13,9 @@ import (
 type Reader struct {
 	Filepaths     []string `toml:"files"`
 	FromBeginning bool
-	DataFormat    string `toml:"data_format"`
-	ParserConfig  parsers.Config
-	Parser        parsers.Parser
-	Tags          []string
+	parser        parsers.Parser
 
 	Filenames []string
-
-	//for grok parser
-	Patterns           []string
-	namedPatterns      []string
-	CustomPatterns     string
-	CustomPatternFiles []string
-	TZone              string
 }
 
 const sampleConfig = `## Files to parse.
@@ -41,38 +31,6 @@ files = ["/var/log/apache/access.log"]
 ## more about them here:
 ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
 data_format = ""
-
-## Parse logstash-style "grok" patterns:
-##   Telegraf built-in parsing patterns: https://goo.gl/dkay10
-[inputs.logparser.grok]
-  ## This is a list of patterns to check the given log file(s) for.
-  ## Note that adding patterns here increases processing time. The most
-  ## efficient configuration is to have one pattern per logparser.
-  ## Other common built-in patterns are:
-  ##   %{COMMON_LOG_FORMAT}   (plain apache & nginx access logs)
-  ##   %{COMBINED_LOG_FORMAT} (access logs + referrer & agent)
-  patterns = ["%{COMBINED_LOG_FORMAT}"]
-
-  ## Name of the outputted measurement name.
-  measurement = "apache_access_log"
-
-  ## Full path(s) to custom pattern files.
-  custom_pattern_files = []
-
-  ## Custom patterns can also be defined here. Put one pattern per line.
-  custom_patterns = '''
-  '''
-
-  ## Timezone allows you to provide an override for timestamps that
-  ## don't already include an offset
-  ## e.g. 04/06/2016 12:41:45 data one two 5.43µs
-  ##
-  ## Default: "" which renders UTC
-  ## Options are as follows:
-  ##   1. Local             -- interpret based on machine localtime
-  ##   2. "Canada/Eastern"  -- Unix TZ values like those found in https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
-  ##   3. UTC               -- or blank/unspecified, will return timestamp in UTC
-  timezone = "Canada/Eastern"
 `
 
 // SampleConfig returns the default configuration of the Input
@@ -100,31 +58,7 @@ func (r *Reader) Gather(acc telegraf.Accumulator) error {
 }
 
 func (r *Reader) SetParser(p parsers.Parser) {
-	r.Parser = p
-}
-
-func (r *Reader) compileParser() {
-	if r.DataFormat == "" {
-		log.Printf("E! No data_format specified")
-		return
-	}
-	r.ParserConfig = parsers.Config{
-		DataFormat: r.DataFormat,
-		TagKeys:    r.Tags,
-
-		//grok settings
-		Patterns:           r.Patterns,
-		NamedPatterns:      r.namedPatterns,
-		CustomPatterns:     r.CustomPatterns,
-		CustomPatternFiles: r.CustomPatternFiles,
-		TimeZone:           r.TZone,
-	}
-	nParser, err := parsers.NewParser(&r.ParserConfig)
-	if err != nil {
-		log.Printf("E! Error building parser: %v", err)
-	}
-
-	r.Parser = nParser
+	r.parser = p
 }
 
 func (r *Reader) refreshFilePaths() {
@@ -151,8 +85,7 @@ func (r *Reader) readMetric(filename string) ([]telegraf.Metric, error) {
 	if err != nil {
 		log.Printf("E! File could not be opened: %v", filename)
 	}
-
-	return r.Parser.Parse(fileContents)
+	return r.parser.Parse(fileContents)
 
 }