-
Notifications
You must be signed in to change notification settings - Fork 0
/
rollingfile.go
179 lines (149 loc) · 3.5 KB
/
rollingfile.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
package rollingfile
import (
"bufio"
"compress/gzip"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"strings"
"time"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/plugins/outputs"
"github.com/influxdata/telegraf/plugins/serializers"
)
type RollingFile struct {
Header string
MaxFileSize int
MaxFileTime int
OpenDirectory string
OpenExtension string
CloseDirectory string
CloseExtension string
HostName string
FileName string
fullName string
closeName string
numBytes int
startTime time.Time
writer io.Writer
closer io.Closer
serializer serializers.Serializer
}
var sampleConfig = `
## Files to write to, "stdout" is a specially handled file.
files = ["stdout", "/tmp/metrics.out"]
## Data format to output.
## 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_OUTPUT.md
data_format = "influx"
`
func (f *RollingFile) SetSerializer(serializer serializers.Serializer) {
f.serializer = serializer
}
func (f *RollingFile) Connect() error {
return f.Open()
}
func (f *RollingFile) Open() error {
f.startTime = time.Now()
var of *os.File
var err error
filename := fmt.Sprintf("%s_%03d_%03d_%s_%s",
f.startTime.Format("20060102_150405"),
f.startTime.Nanosecond()/1000000,
(f.startTime.Nanosecond()/1000)%1000,
f.HostName,
f.FileName)
f.fullName = f.OpenDirectory + "/" + filename + "." + f.OpenExtension
f.closeName = f.CloseDirectory + "/" + filename + "." + f.CloseExtension
if _, err := os.Stat(f.fullName); os.IsNotExist(err) {
of, err = os.Create(f.fullName)
} else {
of, err = os.OpenFile(f.fullName, os.O_APPEND|os.O_WRONLY, os.ModeAppend)
}
if err != nil {
return err
}
f.writer = of
f.closer = of
f.numBytes = 0
if f.Header != "" {
f.writer.Write([]byte(f.Header))
}
return nil
}
func (f *RollingFile) Close() error {
err := f.closer.Close()
if err != nil {
return err
}
filein, err := os.Open(f.fullName)
if err != nil {
return err
}
reader := bufio.NewReader(filein)
content, err := ioutil.ReadAll(reader)
if err != nil {
return err
}
filein.Close()
// Delete the original file
err = os.Remove(f.fullName)
if err != nil {
return err
}
// Open file for writing.
fileout, _ := os.OpenFile(f.closeName, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0660)
// Write compressed data.
if strings.HasSuffix(f.closeName, ".gz") {
w := gzip.NewWriter(fileout)
w.Write(content)
w.Flush()
w.Close()
} else {
w := bufio.NewWriter(fileout)
w.Write(content)
w.Flush()
}
fileout.Close()
return nil
}
func (f *RollingFile) SampleConfig() string {
return sampleConfig
}
func (f *RollingFile) Description() string {
return "Send telegraf metrics to file(s)"
}
func (f *RollingFile) Write(metrics []telegraf.Metric) error {
if len(metrics) == 0 {
return nil
}
for _, metric := range metrics {
b, err := f.serializer.Serialize(metric)
if err != nil {
return fmt.Errorf("failed to serialize message: %s", err)
}
_, err = f.writer.Write(b)
if err != nil {
return fmt.Errorf("failed to write message: %s, %s", b, err)
}
f.numBytes += len(b)
}
now := time.Now()
dur := now.Sub(f.startTime)
if (f.numBytes >= f.MaxFileSize) || (dur.Seconds() >= float64(f.MaxFileTime)) {
err := f.Close()
if err != nil {
log.Printf("[On close]: %s", err)
}
f.Open()
}
return nil
}
func init() {
outputs.Add("rollingfile", func() telegraf.Output {
return &RollingFile{}
})
}