Plugin/reader each interval

Makefile

@@ -92,4 +92,16 @@ docker-image:
 plugins/parsers/influx/machine.go: plugins/parsers/influx/machine.go.rl
 	ragel -Z -G2 $^ -o $@
 
-.PHONY: deps telegraf install test test-windows lint vet test-all package clean docker-image fmtcheck uint64
+static:
+	@echo "Building static linux binary..."
+	@CGO_ENABLED=0 \
+	GOOS=linux \
+	GOARCH=amd64 \
+	go build -ldflags "$(LDFLAGS)" ./cmd/telegraf
+
+plugin-%:
+	@echo "Starting dev environment for $${$(@)} input plugin..."
+	@docker-compose -f plugins/inputs/$${$(@)}/dev/docker-compose.yml up
+
+.PHONY: deps telegraf install test test-windows lint vet test-all package clean docker-image fmtcheck uint64 static
+

docs/DATA_FORMATS_INPUT.md

@@ -9,6 +9,7 @@ Telegraf is able to parse the following input data formats into metrics:
 1. [Nagios](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#nagios) (exec input only)
 1. [Collectd](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#collectd)
 1. [Dropwizard](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#dropwizard)
+1. [Grok](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md#grok)
 
 Telegraf metrics, like InfluxDB
 [points](https://docs.influxdata.com/influxdb/v0.10/write_protocols/line/),
@@ -651,5 +652,37 @@ For more information about the dropwizard json format see
   # [inputs.exec.dropwizard_tag_paths]
   #   tag1 = "tags.tag1"
   #   tag2 = "tags.tag2"
+```
 
-```
+#### Grok
+Parse logstash-style "grok" patterns:
+```toml
+  [inputs.reader]
+    ## 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.
+    name_override = "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"
+    ```

internal/config/config.go

@@ -1338,6 +1338,59 @@ func buildParser(name string, tbl *ast.Table) (parsers.Parser, error) {
 		}
 	}
 
+	//for grok data_format
+	if node, ok := tbl.Fields["named_patterns"]; ok {
+		if kv, ok := node.(*ast.KeyValue); ok {
+			if ary, ok := kv.Value.(*ast.Array); ok {
+				for _, elem := range ary.Value {
+					if str, ok := elem.(*ast.String); ok {
+						c.NamedPatterns = append(c.NamedPatterns, str.Value)
+					}
+				}
+			}
+		}
+	}
+
+	if node, ok := tbl.Fields["patterns"]; ok {
+		if kv, ok := node.(*ast.KeyValue); ok {
+			if ary, ok := kv.Value.(*ast.Array); ok {
+				for _, elem := range ary.Value {
+					if str, ok := elem.(*ast.String); ok {
+						c.Patterns = append(c.Patterns, str.Value)
+					}
+				}
+			}
+		}
+	}
+
+	if node, ok := tbl.Fields["custom_patterns"]; ok {
+		if kv, ok := node.(*ast.KeyValue); ok {
+			if str, ok := kv.Value.(*ast.String); ok {
+				c.CustomPatterns = str.Value
+			}
+		}
+	}
+
+	if node, ok := tbl.Fields["custom_pattern_files"]; ok {
+		if kv, ok := node.(*ast.KeyValue); ok {
+			if ary, ok := kv.Value.(*ast.Array); ok {
+				for _, elem := range ary.Value {
+					if str, ok := elem.(*ast.String); ok {
+						c.CustomPatternFiles = append(c.CustomPatternFiles, str.Value)
+					}
+				}
+			}
+		}
+	}
+
+	if node, ok := tbl.Fields["timezone"]; ok {
+		if kv, ok := node.(*ast.KeyValue); ok {
+			if str, ok := kv.Value.(*ast.String); ok {
+				c.TimeZone = str.Value
+			}
+		}
+	}
+
 	c.MetricName = name
 
 	delete(tbl.Fields, "data_format")
@@ -1353,6 +1406,11 @@ func buildParser(name string, tbl *ast.Table) (parsers.Parser, error) {
 	delete(tbl.Fields, "dropwizard_time_format")
 	delete(tbl.Fields, "dropwizard_tags_path")
 	delete(tbl.Fields, "dropwizard_tag_paths")
+	delete(tbl.Fields, "named_patterns")
+	delete(tbl.Fields, "patterns")
+	delete(tbl.Fields, "custom_patterns")
+	delete(tbl.Fields, "custom_pattern_files")
+	delete(tbl.Fields, "timezone")
 
 	return parsers.NewParser(c)
 }

plugins/inputs/all/all.go

@@ -85,6 +85,7 @@ import (
 	_ "github.com/influxdata/telegraf/plugins/inputs/puppetagent"
 	_ "github.com/influxdata/telegraf/plugins/inputs/rabbitmq"
 	_ "github.com/influxdata/telegraf/plugins/inputs/raindrops"
+	_ "github.com/influxdata/telegraf/plugins/inputs/reader"
 	_ "github.com/influxdata/telegraf/plugins/inputs/redis"
 	_ "github.com/influxdata/telegraf/plugins/inputs/rethinkdb"
 	_ "github.com/influxdata/telegraf/plugins/inputs/riak"

plugins/inputs/reader/dev/docker-compose.yml

@@ -0,0 +1,13 @@
+version: '3'
+
+services:
+  telegraf:
+      image: glinton/scratch
+      volumes:
+        - ./telegraf.conf:/telegraf.conf
+        - ../../../../telegraf:/telegraf
+        - ./json_a.log:/var/log/test.log
+      entrypoint:
+        - /telegraf
+        - --config
+        - /telegraf.conf

plugins/inputs/reader/dev/json_a.log

@@ -0,0 +1,14 @@
+{
+		"parent": {
+			"child": 3.0,
+			"ignored_child": "hi"
+		},
+		"ignored_null": null,
+		"integer": 4,
+		"list": [3, 4],
+		"ignored_parent": {
+			"another_ignored_null": null,
+			"ignored_string": "hello, world!"
+		},
+		"another_list": [4]
+	}

plugins/inputs/reader/dev/telegraf.conf

@@ -0,0 +1,106 @@
+
+# Global tags can be specified here in key="value" format.
+[global_tags]
+  # dc = "us-east-1" # will tag all metrics with dc=us-east-1
+  # rack = "1a"
+  ## Environment variables can be used as tags, and throughout the config file
+  # user = "$USER"
+
+
+# Configuration for telegraf agent
+[agent]
+  ## Default data collection interval for all inputs
+  interval = "15s"
+  ## Rounds collection interval to 'interval'
+  ## ie, if interval="10s" then always collect on :00, :10, :20, etc.
+  round_interval = true
+
+  ## Telegraf will send metrics to outputs in batches of at most
+  ## metric_batch_size metrics.
+  ## This controls the size of writes that Telegraf sends to output plugins.
+  metric_batch_size = 1000
+
+  ## For failed writes, telegraf will cache metric_buffer_limit metrics for each
+  ## output, and will flush this buffer on a successful write. Oldest metrics
+  ## are dropped first when this buffer fills.
+  ## This buffer only fills when writes fail to output plugin(s).
+  metric_buffer_limit = 10000
+
+  ## Collection jitter is used to jitter the collection by a random amount.
+  ## Each plugin will sleep for a random time within jitter before collecting.
+  ## This can be used to avoid many plugins querying things like sysfs at the
+  ## same time, which can have a measurable effect on the system.
+  collection_jitter = "0s"
+
+  ## Default flushing interval for all outputs. You shouldn't set this below
+  ## interval. Maximum flush_interval will be flush_interval + flush_jitter
+  flush_interval = "10s"
+  ## Jitter the flush interval by a random amount. This is primarily to avoid
+  ## large write spikes for users running a large number of telegraf instances.
+  ## ie, a jitter of 5s and interval 10s means flushes will happen every 10-15s
+  flush_jitter = "0s"
+
+  ## By default or when set to "0s", precision will be set to the same
+  ## timestamp order as the collection interval, with the maximum being 1s.
+  ##   ie, when interval = "10s", precision will be "1s"
+  ##       when interval = "250ms", precision will be "1ms"
+  ## Precision will NOT be used for service inputs. It is up to each individual
+  ## service input to set the timestamp at the appropriate precision.
+  ## Valid time units are "ns", "us" (or "µs"), "ms", "s".
+  precision = ""
+
+  ## Logging configuration:
+  ## Run telegraf with debug log messages.
+  debug = false
+  ## Run telegraf in quiet mode (error log messages only).
+  quiet = false
+  ## Specify the log file name. The empty string means to log to stderr.
+  logfile = ""
+
+  ## Override default hostname, if empty use os.Hostname()
+  hostname = ""
+  ## If set to true, do no set the "host" tag in the telegraf agent.
+  omit_hostname = false
+
+# # reload and gather from file[s] on telegraf's interval
+[[inputs.reader]]
+# ## These accept standard unix glob matching rules, but with the addition of
+# ## ** as a "super asterisk". ie:
+# ##   /var/log/**.log     -> recursively find all .log files in /var/log
+# ##   /var/log/*/*.log    -> find all .log files with a parent dir in /var/log
+# ##   /var/log/apache.log -> only tail the apache log file
+files = ["/var/log/test.log"]
+#
+# ## The dataformat to be read from files
+# ## Each data format has its own unique set of configuration options, read
+# ## more about them here:
+# ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+data_format = "json"
+#
+
+#patterns = ["%{TEST_LOG_B}","%{TEST_LOG_A}"]
+#
+#   ## Name of the outputted measurement name.
+#name_override = "grok_reader"
+#
+#   ## Full path(s) to custom pattern files.
+#custom_pattern_files = ["/Users/maxu/go/src/github.com/influxdata/telegraf/plugins/inputs/logparser/grok/testdata/test-patterns"]
+#
+#   ## 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"
+
+
+[[outputs.file]]
+  files = ["stdout"]

plugins/inputs/reader/reader.go

@@ -0,0 +1,102 @@
+package reader
+
+import (
+	"io/ioutil"
+	"log"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/internal/globpath"
+	"github.com/influxdata/telegraf/plugins/inputs"
+	"github.com/influxdata/telegraf/plugins/parsers"
+)
+
+type Reader struct {
+	Filepaths     []string `toml:"files"`
+	FromBeginning bool
+	parser        parsers.Parser
+
+	Filenames []string
+}
+
+const sampleConfig = `## Files to parse each interval.
+## These accept standard unix glob matching rules, but with the addition of
+## ** as a "super asterisk". ie:
+##   /var/log/**.log     -> recursively find all .log files in /var/log
+##   /var/log/*/*.log    -> find all .log files with a parent dir in /var/log
+##   /var/log/apache.log -> only tail the apache log file
+files = ["/var/log/apache/access.log"]
+
+## The dataformat to be read from files
+## Each data format has its own unique set of configuration options, read
+## more about them here:
+## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
+data_format = ""
+`
+
+// SampleConfig returns the default configuration of the Input
+func (r *Reader) SampleConfig() string {
+	return sampleConfig
+}
+
+func (r *Reader) Description() string {
+	return "reload and gather from file[s] on telegraf's interval"
+}
+
+func (r *Reader) Gather(acc telegraf.Accumulator) error {
+	r.refreshFilePaths()
+	for _, k := range r.Filenames {
+		metrics, err := r.readMetric(k)
+		if err != nil {
+			return err
+		}
+
+		for i, m := range metrics {
+
+			//error if m is nil
+			if m == nil {
+				log.Printf("E! Metric could not be parsed from: %v, on line %v", k, i)
+				continue
+			}
+			acc.AddFields(m.Name(), m.Fields(), m.Tags())
+		}
+	}
+	return nil
+}
+
+func (r *Reader) SetParser(p parsers.Parser) {
+	r.parser = p
+}
+
+func (r *Reader) refreshFilePaths() {
+	var allFiles []string
+	for _, filepath := range r.Filepaths {
+		g, err := globpath.Compile(filepath)
+		if err != nil {
+			log.Printf("E! Error Glob %s failed to compile, %s", filepath, err)
+			continue
+		}
+		files := g.Match()
+
+		for k := range files {
+			allFiles = append(allFiles, k)
+		}
+	}
+
+	r.Filenames = allFiles
+}
+
+//requires that Parser has been compiled
+func (r *Reader) readMetric(filename string) ([]telegraf.Metric, error) {
+	fileContents, err := ioutil.ReadFile(filename)
+	if err != nil {
+		log.Printf("E! File could not be opened: %v", filename)
+	}
+	return r.parser.Parse(fileContents)
+
+}
+
+func init() {
+	inputs.Add("reader", func() telegraf.Input {
+		return &Reader{}
+	})
+}