This repository has been archived by the owner on Jun 20, 2024. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 22
/
main.go
242 lines (200 loc) · 8.19 KB
/
main.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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
package main
import (
"context"
"crypto/tls"
"crypto/x509"
"encoding/json"
"flag"
"fmt"
"os"
"time"
"github.com/sirupsen/logrus"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/protobuf/reflect/protoreflect"
"github.com/cilium/hubble-otel/common"
"github.com/cilium/hubble-otel/logs"
"github.com/cilium/hubble-otel/trace"
)
type flags struct {
address *string
tls *flagsTLS
}
type flagsTLS struct {
enable, insecureSkipVerify *bool
clientCertificate, clientKey, certificateAuthority *string
}
// TODO: add prometheus metircs for buffer size, throughput, errors, badger ops etc
func main() {
flagsHubble := flags{
address: flag.String("hubble.address", "localhost:4245", "connect to Hubble on this address"),
tls: &flagsTLS{
enable: flag.Bool("hubble.tls.enable", false, "connect to Hubble using TLS"),
insecureSkipVerify: flag.Bool("hubble.tls.insecureSkipVerify", false, "disable TLS verification for Hubble"),
clientCertificate: flag.String("hubble.tls.clientCertificate", "", ""),
clientKey: flag.String("hubble.tls.clientKey", "", ""),
certificateAuthority: flag.String("hubble.tls.certificateAuthority", "", ""),
},
}
flagsOTLP := flags{
address: flag.String("otlp.address", "", "connect to OTLP receiver on this address"),
tls: &flagsTLS{
enable: flag.Bool("otlp.tls.enable", false, "connect to OTLP receiver using TLS"),
insecureSkipVerify: flag.Bool("otlp.tls.insecureSkipVerify", false, "disable TLS verification for OTLP receiver"),
clientCertificate: flag.String("otlp.tls.clientCertificate", "", ""),
clientKey: flag.String("otlp.tls.clientKey", "", ""),
certificateAuthority: flag.String("otlp.tls.certificateAuthority", "", ""),
},
}
otlpHeaders := flag.String("otlp.headers", "", "specify OTLP headers to use as a JSON object")
bufferSize := flag.Int("bufferSize", 2048, "number of logs/spans to buffer before exporting")
fallbackServiceNamePrefix := flag.String("fallbackServiceNamePrefix", common.OTelAttrServiceNameDefaultPrefix, "fallback value to use for unknown 'service.name'")
exportLogs := flag.Bool("logs.export", true, "export flows as logs")
logsEncodingOptions := &common.EncodingOptions{
Encoding: flag.String("logs.format", common.DefaultLogEncoding, fmt.Sprintf("encoding format (valid options: %v)", common.EncodingFormatsForLogs())),
LogPayloadAsBody: flag.Bool("logs.payloadAsBody", false, "use log body to store flow data instead of attributes"),
TopLevelKeys: flag.Bool("logs.useTopLevelKeys", false, "reduce nesting when storing flows as attributes"),
LabelsAsMaps: flag.Bool("logs.labelsAsMaps", false, "convert source/destination labels from arrays to maps"),
HeadersAsMaps: flag.Bool("logs.headersAsMaps", false, "convert HTTP headers from arrays to maps"),
}
exportTraces := flag.Bool("trace.export", true, "export flows as traces")
traceEncodingOptions := &common.EncodingOptions{
Encoding: flag.String("trace.format", common.DefaultTraceEncoding, fmt.Sprintf("encoding format (valid options: %v)", common.EncodingFormatsForTraces())),
TopLevelKeys: flag.Bool("trace.useTopLevelKeys", false, "reduce nesting when storing flows as attributes"),
LabelsAsMaps: flag.Bool("trace.labelsAsMaps", false, "convert source/destination labels from arrays to maps"),
HeadersAsMaps: flag.Bool("trace.headersAsMaps", false, "convert HTTP headers from arrays to maps"),
}
traceCacheWindow := flag.Duration("trace.cacheWindow", trace.DefaultTraceCacheWindow, "max lenght of cache window for trace IDs")
parseTraceHeaders := flag.Bool("trace.parseHeaders", true, "weather to parse common HTTP trace headers")
debug := flag.Bool("debug", false, "enable debug logs")
flag.Parse()
log := logrus.New()
log.Formatter = &logrus.JSONFormatter{}
if *debug {
log.SetLevel(logrus.DebugLevel)
} else {
log.SetLevel(logrus.InfoLevel)
}
otlpHeadersObj := map[string]string{}
if *otlpHeaders != "" {
if err := json.Unmarshal([]byte(*otlpHeaders), &otlpHeadersObj); err != nil {
log.Errorf("cannot parse OTLP headers: %s\n", err)
os.Exit(2)
}
}
if err := logsEncodingOptions.ValidForLogs(); err != nil {
log.Errorf("logs encoding options are invalid: %s\n", err)
os.Exit(2)
}
if err := traceEncodingOptions.ValidForTraces(); err != nil {
log.Errorf("trace encoding options are invalid: %s\n", err)
os.Exit(2)
}
if err := run(
log,
flagsHubble, flagsOTLP,
otlpHeadersObj,
*exportLogs, *exportTraces,
*bufferSize,
*fallbackServiceNamePrefix,
logsEncodingOptions, traceEncodingOptions,
*traceCacheWindow,
*parseTraceHeaders,
); err != nil {
log.Error(err)
os.Exit(1)
}
}
func (f *flagsTLS) loadCredentials(log *logrus.Logger) (credentials.TransportCredentials, error) {
config := &tls.Config{
InsecureSkipVerify: *f.insecureSkipVerify,
}
if *f.clientCertificate != "" && *f.clientKey != "" {
keyPair, err := tls.LoadX509KeyPair(*f.clientCertificate, *f.clientKey)
if err != nil {
return nil, fmt.Errorf("cannot parse client certificate/key pair: %w", err)
}
config.Certificates = []tls.Certificate{keyPair}
} else {
log.Warn("TLS authentication is disabled as client certificate/key pair wasn't specified")
}
if *f.certificateAuthority != "" {
config.RootCAs = x509.NewCertPool()
data, err := os.ReadFile(*f.certificateAuthority)
if err != nil {
return nil, fmt.Errorf("cannot open CA certificate %q: %w", *f.certificateAuthority, err)
}
if ok := config.RootCAs.AppendCertsFromPEM(data); !ok {
return nil, fmt.Errorf("cannot parse CA certificate %q: invalid PEM", *f.certificateAuthority)
}
} else if !*f.insecureSkipVerify {
return nil, fmt.Errorf("when verification is required CA certificate must be specified")
}
return credentials.NewTLS(config), nil
}
func dialContext(ctx context.Context, log *logrus.Logger, f *flags) (*grpc.ClientConn, error) {
if !*f.tls.enable {
return grpc.DialContext(ctx, *f.address, grpc.WithInsecure())
}
creds, err := f.tls.loadCredentials(log)
if err != nil {
return nil, err
}
return grpc.DialContext(ctx, *f.address, grpc.WithTransportCredentials(creds))
}
func run(
log *logrus.Logger,
hubbleFlags, otlpFlags flags,
otlpHeaders map[string]string,
exportLogs, exportTraces bool,
bufferSize int,
fallbackServiceNamePrefix string,
logsEncodingOptions, traceEncodingOptions *common.EncodingOptions,
traceCacheWindow time.Duration,
parseTraceHeaders bool,
) error {
ctx := context.Background()
hubbleConn, err := dialContext(ctx, log, &hubbleFlags)
if err != nil {
return fmt.Errorf("failed to connect to Hubble server: %w", err)
}
defer hubbleConn.Close()
otlpConn, err := dialContext(ctx, log, &otlpFlags)
if err != nil {
return fmt.Errorf("failed to connect to OTLP receiver: %w", err)
}
defer otlpConn.Close()
errs := make(chan error)
if exportLogs {
flowsToLogs := make(chan protoreflect.Message, bufferSize)
converter := logs.NewFlowConverter(log, logsEncodingOptions, &common.IncludeFlowTypes{}, fallbackServiceNamePrefix)
go common.RunConverter(ctx, hubbleConn, converter, flowsToLogs, errs)
exporter := logs.NewBufferedLogExporter(otlpConn, bufferSize, otlpHeaders)
go common.RunExporter(ctx, log, exporter, flowsToLogs, errs)
}
if exportTraces {
spanDB, err := os.MkdirTemp("", "hubble-otel-trace-cache-") // TODO: allow user to pass dir name for persistence
if err != nil {
return fmt.Errorf("failed to create temporary directory for span database: %w", err)
}
flowsToTraces := make(chan protoreflect.Message, bufferSize)
converter, err := trace.NewFlowConverter(log, spanDB, traceEncodingOptions, &common.IncludeFlowTypes{}, fallbackServiceNamePrefix, traceCacheWindow, parseTraceHeaders)
if err != nil {
return fmt.Errorf("failed to create trace converter: %w", err)
}
// defer converter.DeleteCache() // TODO: make this optional when persistence is enabled
go common.RunConverter(ctx, hubbleConn, converter, flowsToTraces, errs)
exporter := trace.NewBufferedTraceExporter(otlpConn, bufferSize, otlpHeaders)
go common.RunExporter(ctx, log, exporter, flowsToTraces, errs)
}
for {
select {
case <-ctx.Done():
return nil
case err := <-errs:
if err != nil {
return err
}
}
}
}