fix tail input seeking when used with pipe (#2090)

This commit is contained in:
Patrick Hemmer 2016-12-16 09:01:49 -05:00 committed by Cameron Sparr
parent 90cec20d1d
commit ecbc634221
3 changed files with 19 additions and 5 deletions

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@ -31,6 +31,7 @@ in their config file.
- [#2049](https://github.com/influxdata/telegraf/pull/2049): Fix the Value data format not trimming null characters from input.
- [#1949](https://github.com/influxdata/telegraf/issues/1949): Fix windows `net` plugin.
- [#1775](https://github.com/influxdata/telegraf/issues/1775): Cache & expire metrics for delivery to prometheus
- [#1775](https://github.com/influxdata/telegraf/issues/1775): Cache & expire metrics for delivery to prometheus.
- [#2146](https://github.com/influxdata/telegraf/issues/2146): Fix potential panic in aggregator plugin metric maker.
- [#1843](https://github.com/influxdata/telegraf/pull/1843) & [#1668](https://github.com/influxdata/telegraf/issues/1668): Add optional ability to define PID as a tag.
@ -41,6 +42,7 @@ in their config file.
- [#1693](https://github.com/influxdata/telegraf/issues/1693): Properly collect nested jolokia struct data.
- [#1917](https://github.com/influxdata/telegraf/pull/1917): fix puppetagent inputs plugin to support string for config variable.
- [#1987](https://github.com/influxdata/telegraf/issues/1987): fix docker input plugin tags when registry has port.
- [#2089](https://github.com/influxdata/telegraf/issues/2089): Fix tail input when reading from a pipe.
## v1.1.2 [2016-12-12]

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@ -36,6 +36,8 @@ The plugin expects messages in one of the
files = ["/var/mymetrics.out"]
## Read file from beginning.
from_beginning = false
## Whether file is a named pipe
pipe = false
## Data format to consume.
## Each data format has it's own unique set of configuration options, read

View File

@ -16,6 +16,7 @@ import (
type Tail struct {
Files []string
FromBeginning bool
Pipe bool
tailers []*tail.Tail
parser parsers.Parser
@ -44,6 +45,8 @@ const sampleConfig = `
files = ["/var/mymetrics.out"]
## Read file from beginning.
from_beginning = false
## Whether file is a named pipe
pipe = false
## Data format to consume.
## Each data format has it's own unique set of configuration options, read
@ -70,10 +73,12 @@ func (t *Tail) Start(acc telegraf.Accumulator) error {
t.acc = acc
var seek tail.SeekInfo
if !t.FromBeginning {
seek.Whence = 2
seek.Offset = 0
var seek *tail.SeekInfo
if !t.Pipe && !t.FromBeginning {
seek = &tail.SeekInfo{
Whence: 2,
Offset: 0,
}
}
var errS string
@ -88,8 +93,9 @@ func (t *Tail) Start(acc telegraf.Accumulator) error {
tail.Config{
ReOpen: true,
Follow: true,
Location: &seek,
Location: seek,
MustExist: true,
Pipe: t.Pipe,
})
if err != nil {
errS += err.Error() + " "
@ -130,6 +136,10 @@ func (t *Tail) receiver(tailer *tail.Tail) {
tailer.Filename, line.Text, err)
}
}
if err := tailer.Err(); err != nil {
log.Printf("E! Error tailing file %s, Error: %s\n",
tailer.Filename, err)
}
}
func (t *Tail) Stop() {