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
180
181
182
|
package processing
// DCSO FEVER
// Copyright (c) 2018, DCSO GmbH
import (
"bytes"
"fmt"
"os"
"os/exec"
"sync"
"time"
"github.com/DCSO/fever/types"
"github.com/DCSO/fever/util"
log "github.com/sirupsen/logrus"
)
// EventProfile contains counts per event_type such as occurrences and
// JSON size.
type EventProfile struct {
CountMap map[string]uint64
SizeMap map[string]uint64
}
// EventProfiler counts EVE event type statistics, such as number and size
// of JSON data received from the input.
type EventProfiler struct {
SensorID string
Host string
Profile EventProfile
FlushPeriod time.Duration
ProfileMutex sync.Mutex
CloseChan chan bool
ClosedChan chan bool
Logger *log.Entry
Submitter util.StatsSubmitter
SubmitChannel chan []byte
}
func getFQDN() (fqdn string) {
cmd := exec.Command("/bin/hostname", "-f")
var out bytes.Buffer
cmd.Stdout = &out
err := cmd.Run()
if err != nil {
log.Warn(err)
host, err := os.Hostname()
if err != nil {
return "unknown"
}
return host
}
fqdn = out.String()
if len(fqdn) > 1 {
fqdn = fqdn[:len(fqdn)-1]
} else {
fqdn = "unknown"
}
return fqdn
}
// MakeEventProfiler creates a new EventProfiler.
func MakeEventProfiler(flushPeriod time.Duration, submitter util.StatsSubmitter) (*EventProfiler, error) {
sensorID, err := util.GetSensorID()
if err != nil {
return nil, err
}
a := &EventProfiler{
FlushPeriod: flushPeriod,
Logger: log.WithFields(log.Fields{
"domain": "eventprofiler",
}),
Profile: EventProfile{
CountMap: make(map[string]uint64),
SizeMap: make(map[string]uint64),
},
CloseChan: make(chan bool),
ClosedChan: make(chan bool),
SubmitChannel: make(chan []byte, 60),
Submitter: submitter,
SensorID: sensorID,
}
a.SensorID, _ = os.Hostname()
a.Host = getFQDN()
return a, nil
}
func (a *EventProfiler) formatLineProtocol() string {
out := ""
a.ProfileMutex.Lock()
myProfile := a.Profile
first := true
for k, v := range myProfile.SizeMap {
if !first {
out += ","
} else {
first = false
}
out += fmt.Sprintf("size.%s=%d", k, v)
}
for k, v := range myProfile.CountMap {
out += fmt.Sprintf(",count.%s=%d", k, v)
}
a.ProfileMutex.Unlock()
if out == "" {
return ""
}
return fmt.Sprintf("%s,host=%s %s %d", util.ToolName, a.Host, out, uint64(time.Now().UnixNano()))
}
func (a *EventProfiler) flush() {
lineString := a.formatLineProtocol()
if lineString == "" {
return
}
select {
case a.SubmitChannel <- []byte(lineString):
break
default:
log.Warning("channel is full, cannot submit message...")
}
}
// Consume processes an Entry, adding the data within to the internal
// aggregated state
func (a *EventProfiler) Consume(e *types.Entry) error {
etype := e.EventType
a.ProfileMutex.Lock()
a.Profile.CountMap[etype]++
a.Profile.SizeMap[etype] += uint64(len(e.JSONLine))
a.ProfileMutex.Unlock()
return nil
}
// Run starts the background aggregation service for this handler
func (a *EventProfiler) Run() {
go func() {
for message := range a.SubmitChannel {
a.Submitter.SubmitWithHeaders(message, "", "text/plain", map[string]string{
"database": "telegraf",
"retention_policy": "default",
})
}
}()
go func() {
i := 0 * time.Second
for {
select {
case <-a.CloseChan:
close(a.SubmitChannel)
close(a.ClosedChan)
return
default:
if i >= a.FlushPeriod {
a.flush()
i = 0 * time.Second
}
time.Sleep(1 * time.Second)
i += 1 * time.Second
}
}
}()
}
// Stop causes the aggregator to cease aggregating and submitting data
func (a *EventProfiler) Stop(stopChan chan bool) {
close(a.CloseChan)
<-a.ClosedChan
close(stopChan)
}
// GetName returns the name of the handler
func (a *EventProfiler) GetName() string {
return "Event profiler"
}
// GetEventTypes returns a slice of event type strings that this handler
// should be applied to
func (a *EventProfiler) GetEventTypes() []string {
return []string{"*"}
}
|
