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Add Serializer plugins, and 'file' output plugin
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1 @@ | ||
| # file Output Plugin |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| package file | ||
|
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| import ( | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
|
|
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| "github.com/influxdata/telegraf" | ||
| "github.com/influxdata/telegraf/plugins/outputs" | ||
| "github.com/influxdata/telegraf/plugins/serializers" | ||
| ) | ||
|
|
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| type File struct { | ||
| Files []string | ||
|
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| writer io.Writer | ||
| closers []io.Closer | ||
|
|
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| serializer serializers.Serializer | ||
| } | ||
|
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| var sampleConfig = ` | ||
| ### Files to write to, "stdout" is a specially handled file. | ||
| files = ["stdout", "/tmp/metrics.out"] | ||
| ### Data format to output. This can be "influx" or "graphite" | ||
| ### Each data format has it's own unique set of configuration options, read | ||
| ### more about them here: | ||
| ### https://github.com/influxdata/telegraf/blob/master/DATA_FORMATS_OUTPUT.md | ||
| data_format = "influx" | ||
| ` | ||
|
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| func (f *File) SetSerializer(serializer serializers.Serializer) { | ||
| f.serializer = serializer | ||
| } | ||
|
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| func (f *File) Connect() error { | ||
| writers := []io.Writer{} | ||
| for _, file := range f.Files { | ||
| if file == "stdout" { | ||
| writers = append(writers, os.Stdout) | ||
| f.closers = append(f.closers, os.Stdout) | ||
| } else { | ||
| var of *os.File | ||
| var err error | ||
| if _, err := os.Stat(file); os.IsNotExist(err) { | ||
| of, err = os.Create(file) | ||
| } else { | ||
| of, err = os.OpenFile(file, os.O_APPEND|os.O_WRONLY, os.ModeAppend) | ||
| } | ||
|
|
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| if err != nil { | ||
| return err | ||
| } | ||
| writers = append(writers, of) | ||
| f.closers = append(f.closers, of) | ||
| } | ||
| } | ||
| f.writer = io.MultiWriter(writers...) | ||
| return nil | ||
| } | ||
|
|
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| func (f *File) Close() error { | ||
| var errS string | ||
| for _, c := range f.closers { | ||
| if err := c.Close(); err != nil { | ||
| errS += err.Error() + "\n" | ||
| } | ||
| } | ||
| if errS != "" { | ||
| return fmt.Errorf(errS) | ||
| } | ||
| return nil | ||
| } | ||
|
|
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| func (f *File) SampleConfig() string { | ||
| return sampleConfig | ||
| } | ||
|
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| func (f *File) Description() string { | ||
| return "Send telegraf metrics to file(s)" | ||
| } | ||
|
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| func (f *File) Write(metrics []telegraf.Metric) error { | ||
| if len(metrics) == 0 { | ||
| return nil | ||
| } | ||
|
|
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| for _, metric := range metrics { | ||
| values, err := f.serializer.Serialize(metric) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| for _, value := range values { | ||
| _, err = f.writer.Write([]byte(value + "\n")) | ||
| if err != nil { | ||
| return fmt.Errorf("FAILED to write message: %s, %s", value, err) | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
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| func init() { | ||
| outputs.Add("file", func() telegraf.Output { | ||
| return &File{} | ||
| }) | ||
| } |
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