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
|
#!/usr/bin/env node
/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import path from 'path';
import fs from 'fs';
import { spawn, execSync } from 'child_process';
import { fileURLToPath } from 'url';
import {
BIN_DIR,
OTEL_DIR,
ensureBinary,
fileExists,
manageTelemetrySettings,
registerCleanup,
waitForPort,
} from './telemetry_utils.js';
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const OTEL_CONFIG_FILE = path.join(OTEL_DIR, 'collector-local.yaml');
const OTEL_LOG_FILE = path.join(OTEL_DIR, 'collector.log');
const JAEGER_LOG_FILE = path.join(OTEL_DIR, 'jaeger.log');
const JAEGER_PORT = 16686;
// This configuration is for the primary otelcol-contrib instance.
// It receives from the CLI on 4317, exports traces to Jaeger on 14317,
// and sends metrics/logs to the debug log.
const OTEL_CONFIG_CONTENT = `
receivers:
otlp:
protocols:
grpc:
endpoint: "localhost:4317"
processors:
batch:
timeout: 1s
exporters:
otlp:
endpoint: "localhost:14317"
tls:
insecure: true
debug:
verbosity: detailed
service:
telemetry:
logs:
level: "debug"
metrics:
level: "none"
pipelines:
traces:
receivers: [otlp]
processors: [batch]
exporters: [otlp]
metrics:
receivers: [otlp]
processors: [batch]
exporters: [debug]
logs:
receivers: [otlp]
processors: [batch]
exporters: [debug]
`;
async function main() {
// 1. Ensure binaries are available, downloading if necessary.
// Binaries are stored in the project's .gemini/otel/bin directory
// to avoid modifying the user's system.
if (!fileExists(BIN_DIR)) fs.mkdirSync(BIN_DIR, { recursive: true });
const otelcolPath = await ensureBinary(
'otelcol-contrib',
'open-telemetry/opentelemetry-collector-releases',
(version, platform, arch, ext) =>
`otelcol-contrib_${version}_${platform}_${arch}.${ext}`,
'otelcol-contrib',
false, // isJaeger = false
).catch((e) => {
console.error(`๐ Error getting otelcol-contrib: ${e.message}`);
return null;
});
if (!otelcolPath) process.exit(1);
const jaegerPath = await ensureBinary(
'jaeger',
'jaegertracing/jaeger',
(version, platform, arch, ext) =>
`jaeger-${version}-${platform}-${arch}.${ext}`,
'jaeger',
true, // isJaeger = true
).catch((e) => {
console.error(`๐ Error getting jaeger: ${e.message}`);
return null;
});
if (!jaegerPath) process.exit(1);
// 2. Kill any existing processes to ensure a clean start.
console.log('๐งน Cleaning up old processes and logs...');
try {
execSync('pkill -f "otelcol-contrib"');
console.log('โ
Stopped existing otelcol-contrib process.');
} catch (_e) {} // eslint-disable-line no-empty
try {
execSync('pkill -f "jaeger"');
console.log('โ
Stopped existing jaeger process.');
} catch (_e) {} // eslint-disable-line no-empty
try {
if (fileExists(OTEL_LOG_FILE)) fs.unlinkSync(OTEL_LOG_FILE);
console.log('โ
Deleted old collector log.');
} catch (e) {
if (e.code !== 'ENOENT') console.error(e);
}
try {
if (fileExists(JAEGER_LOG_FILE)) fs.unlinkSync(JAEGER_LOG_FILE);
console.log('โ
Deleted old jaeger log.');
} catch (e) {
if (e.code !== 'ENOENT') console.error(e);
}
let jaegerProcess, collectorProcess;
let jaegerLogFd, collectorLogFd;
const originalSandboxSetting = manageTelemetrySettings(
true,
'http://localhost:4317',
'local',
);
registerCleanup(
() => [jaegerProcess, collectorProcess],
() => [jaegerLogFd, collectorLogFd],
originalSandboxSetting,
);
if (!fileExists(OTEL_DIR)) fs.mkdirSync(OTEL_DIR, { recursive: true });
fs.writeFileSync(OTEL_CONFIG_FILE, OTEL_CONFIG_CONTENT);
console.log('๐ Wrote OTEL collector config.');
// Start Jaeger
console.log(`๐ Starting Jaeger service... Logs: ${JAEGER_LOG_FILE}`);
jaegerLogFd = fs.openSync(JAEGER_LOG_FILE, 'a');
jaegerProcess = spawn(
jaegerPath,
['--set=receivers.otlp.protocols.grpc.endpoint=localhost:14317'],
{ stdio: ['ignore', jaegerLogFd, jaegerLogFd] },
);
console.log(`โณ Waiting for Jaeger to start (PID: ${jaegerProcess.pid})...`);
try {
await waitForPort(JAEGER_PORT);
console.log(`โ
Jaeger started successfully.`);
} catch (_) {
console.error(`๐ Error: Jaeger failed to start on port ${JAEGER_PORT}.`);
if (jaegerProcess && jaegerProcess.pid) {
process.kill(jaegerProcess.pid, 'SIGKILL');
}
if (fileExists(JAEGER_LOG_FILE)) {
console.error('๐ Jaeger Log Output:');
console.error(fs.readFileSync(JAEGER_LOG_FILE, 'utf-8'));
}
process.exit(1);
}
// Start the primary OTEL collector
console.log(`๐ Starting OTEL collector... Logs: ${OTEL_LOG_FILE}`);
collectorLogFd = fs.openSync(OTEL_LOG_FILE, 'a');
collectorProcess = spawn(otelcolPath, ['--config', OTEL_CONFIG_FILE], {
stdio: ['ignore', collectorLogFd, collectorLogFd],
});
console.log(
`โณ Waiting for OTEL collector to start (PID: ${collectorProcess.pid})...`,
);
try {
await waitForPort(4317);
console.log(`โ
OTEL collector started successfully.`);
} catch (_) {
console.error(`๐ Error: OTEL collector failed to start on port 4317.`);
if (collectorProcess && collectorProcess.pid) {
process.kill(collectorProcess.pid, 'SIGKILL');
}
if (fileExists(OTEL_LOG_FILE)) {
console.error('๐ OTEL Collector Log Output:');
console.error(fs.readFileSync(OTEL_LOG_FILE, 'utf-8'));
}
process.exit(1);
}
[jaegerProcess, collectorProcess].forEach((proc) => {
if (proc) {
proc.on('error', (err) => {
console.error(`${proc.spawnargs[0]} process error:`, err);
process.exit(1);
});
}
});
console.log(`
โจ Local telemetry environment is running.`);
console.log(
`
๐ View traces in the Jaeger UI: http://localhost:${JAEGER_PORT}`,
);
console.log(`๐ View metrics in the logs and metrics: ${OTEL_LOG_FILE}`);
console.log(
`
๐ Tail logs and metrics in another terminal: tail -f ${OTEL_LOG_FILE}`,
);
console.log(`
Press Ctrl+C to exit.`);
}
main();
|
