main.rs 23.9 KB
Newer Older
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
1
use clap::Parser;
2
use serde::Deserialize;
Nicolas Patry's avatar
Nicolas Patry committed
3
use std::env;
4
use std::ffi::OsString;
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
5
6
7
8
9
10
11
12
13
14
15
use std::io::{BufRead, BufReader, Read};
use std::path::Path;
use std::process::ExitCode;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::mpsc::TryRecvError;
use std::sync::Arc;
use std::sync::{mpsc, Mutex};
use std::thread;
use std::thread::sleep;
use std::time::{Duration, Instant};
use std::{fs, io};
16
use subprocess::{ExitStatus, Popen, PopenConfig, PopenError, Redirection};
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
17
18
19
20
21
22

/// App Configuration
#[derive(Parser, Debug)]
#[clap(author, version, about, long_about = None)]
struct Args {
    #[clap(default_value = "bigscience/bloom-560m", long, env)]
23
    model_id: String,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
24
    #[clap(long, env)]
25
    revision: Option<String>,
26
27
28
29
    #[clap(long, env)]
    sharded: Option<bool>,
    #[clap(long, env)]
    num_shard: Option<usize>,
30
31
    #[clap(long, env)]
    quantize: bool,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
32
33
    #[clap(default_value = "128", long, env)]
    max_concurrent_requests: usize,
34
35
    #[clap(default_value = "2", long, env)]
    max_best_of: usize,
36
37
    #[clap(default_value = "4", long, env)]
    max_stop_sequences: usize,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
38
39
    #[clap(default_value = "1000", long, env)]
    max_input_length: usize,
40
41
    #[clap(default_value = "1512", long, env)]
    max_total_tokens: usize,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
42
43
    #[clap(default_value = "32", long, env)]
    max_batch_size: usize,
44
45
    #[clap(default_value = "20", long, env)]
    max_waiting_tokens: usize,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
46
47
48
49
    #[clap(default_value = "3000", long, short, env)]
    port: u16,
    #[clap(default_value = "/tmp/text-generation-server", long, env)]
    shard_uds_path: String,
50
    #[clap(default_value = "localhost", long, env)]
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
51
    master_addr: String,
52
    #[clap(default_value = "29500", long, env)]
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
53
    master_port: usize,
54
    #[clap(long, env)]
55
56
57
58
    huggingface_hub_cache: Option<String>,
    #[clap(long, env)]
    weights_cache_override: Option<String>,
    #[clap(long, env)]
59
60
    disable_custom_kernels: bool,
    #[clap(long, env)]
61
    json_output: bool,
62
63
    #[clap(long, env)]
    otlp_endpoint: Option<String>,
64
65
    #[clap(long, env)]
    cors_allow_origin: Vec<String>,
66
67
68
69
    #[clap(long, env)]
    watermark_gamma: Option<f32>,
    #[clap(long, env)]
    watermark_delta: Option<f32>,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
70
71
72
73
}

fn main() -> ExitCode {
    // Pattern match configuration
74
75
76
77
78
79
80
81
82
83
    let args = Args::parse();

    if args.json_output {
        tracing_subscriber::fmt().json().init();
    } else {
        tracing_subscriber::fmt().compact().init();
    }

    tracing::info!("{:?}", args);

Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
84
    let Args {
85
        model_id,
86
        revision,
87
        sharded,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
88
        num_shard,
89
        quantize,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
90
        max_concurrent_requests,
91
        max_best_of,
92
        max_stop_sequences,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
93
        max_input_length,
94
        max_total_tokens,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
95
        max_batch_size,
96
        max_waiting_tokens,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
97
98
99
100
        port,
        shard_uds_path,
        master_addr,
        master_port,
101
102
        huggingface_hub_cache,
        weights_cache_override,
103
        disable_custom_kernels,
104
        json_output,
105
        otlp_endpoint,
106
        cors_allow_origin,
107
108
        watermark_gamma,
        watermark_delta,
109
    } = args;
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
110

111
112
113
114
115
116
117
118
119
120
    // get the number of shards given `sharded` and `num_shard`
    let num_shard = if let Some(sharded) = sharded {
        // sharded is set
        match sharded {
            // sharded is set and true
            true => {
                match num_shard {
                    None => {
                        // try to default to the number of available GPUs
                        tracing::info!("Parsing num_shard from CUDA_VISIBLE_DEVICES");
121
                        let n_devices = num_cuda_devices()
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
                            .expect("--num-shard and CUDA_VISIBLE_DEVICES are not set");
                        if n_devices <= 1 {
                            panic!("`sharded` is true but only found {n_devices} CUDA devices");
                        }
                        n_devices
                    }
                    Some(num_shard) => {
                        // we can't have only one shard while sharded
                        if num_shard <= 1 {
                            panic!("`sharded` is true but `num_shard` <= 1");
                        }
                        num_shard
                    }
                }
            }
            // sharded is set and false
            false => {
                let num_shard = num_shard.unwrap_or(1);
                // we can't have more than one shard while not sharded
                if num_shard != 1 {
                    panic!("`sharded` is false but `num_shard` != 1");
                }
                num_shard
            }
        }
    } else {
148
149
150
151
152
        match num_shard {
            // get num_shard from CUDA_VISIBLE_DEVICES or default to a single shard
            None => num_cuda_devices().unwrap_or(1),
            Some(num_shard) => num_shard,
        }
153
    };
154
155
156
157
158
159
160
    if num_shard < 1 {
        panic!("`num_shard` cannot be < 1");
    }

    if num_shard > 1 {
        tracing::info!("Sharding model on {num_shard} processes");
    }
161

Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
162
163
164
165
166
167
168
169
    // Signal handler
    let running = Arc::new(AtomicBool::new(true));
    let r = running.clone();
    ctrlc::set_handler(move || {
        r.store(false, Ordering::SeqCst);
    })
    .expect("Error setting Ctrl-C handler");

170
171
172
173
    // Check if model_id is a local model
    let local_path = Path::new(&model_id);
    let is_local_model = local_path.exists() && local_path.is_dir();

174
    // Download weights for sharded models
175
    if !is_local_model && weights_cache_override.is_none() && num_shard > 1 {
176
177
178
179
        let mut download_argv = vec![
            "text-generation-server".to_string(),
            "download-weights".to_string(),
            model_id.clone(),
180
181
            "--extension".to_string(),
            ".safetensors".to_string(),
182
183
184
185
186
187
188
189
190
191
192
            "--logger-level".to_string(),
            "INFO".to_string(),
            "--json-output".to_string(),
        ];

        // Model optional revision
        if let Some(ref revision) = revision {
            download_argv.push("--revision".to_string());
            download_argv.push(revision.to_string())
        }

193
194
        // Copy current process env
        let mut env: Vec<(OsString, OsString)> = env::vars_os().collect();
195

196
        // If huggingface_hub_cache is set, pass it to the shard
197
198
199
200
201
        // Useful when running inside a docker container
        if let Some(ref huggingface_hub_cache) = huggingface_hub_cache {
            env.push(("HUGGINGFACE_HUB_CACHE".into(), huggingface_hub_cache.into()));
        };

202
        // Enable hf transfer for insane download speeds
203
204
205
206
207
208
209
210
211
212
        let enable_hf_transfer = env::var("HF_HUB_ENABLE_HF_TRANSFER").unwrap_or("1".to_string());
        env.push((
            "HF_HUB_ENABLE_HF_TRANSFER".into(),
            enable_hf_transfer.into(),
        ));

        // Parse Inference API token
        if let Ok(api_token) = env::var("HF_API_TOKEN") {
            env.push(("HUGGING_FACE_HUB_TOKEN".into(), api_token.into()))
        };
213

214
        // Start process
215
        tracing::info!("Starting download process.");
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
243
244
245
246
        let mut download_process = match Popen::create(
            &download_argv,
            PopenConfig {
                stdout: Redirection::Pipe,
                stderr: Redirection::Pipe,
                // Needed for the shutdown procedure
                setpgid: true,
                env: Some(env),
                ..Default::default()
            },
        ) {
            Ok(p) => p,
            Err(err) => {
                if let PopenError::IoError(ref err) = err {
                    if err.kind() == io::ErrorKind::NotFound {
                        tracing::error!("text-generation-server not found in PATH");
                        tracing::error!("Please install it with `make install-server`")
                    }
                }
                return ExitCode::FAILURE;
            }
        };

        // Redirect STDOUT to the console
        let download_stdout = download_process.stdout.take().unwrap();
        thread::spawn(move || {
            // Enter download tracing span
            let stdout = BufReader::new(download_stdout);
            let _span = tracing::span!(tracing::Level::INFO, "download").entered();
            for line in stdout.lines() {
                // Parse loguru logs
247
248
                if let Ok(log) = serde_json::from_str::<PythonLogMessage>(&line.unwrap()) {
                    log.trace();
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
                }
            }
        });

        loop {
            if let Some(status) = download_process.poll() {
                match status {
                    ExitStatus::Exited(exit_code) => {
                        if exit_code == 0 {
                            tracing::info!("Successfully downloaded weights.");
                            break;
                        } else {
                            let mut err = String::new();
                            download_process
                                .stderr
                                .take()
                                .unwrap()
                                .read_to_string(&mut err)
                                .unwrap();
                            tracing::error!("Download encountered an error: {err}");
                            return ExitCode::FAILURE;
                        }
                    }
                    _ => {
273
                        tracing::error!("Download process exited with an unknown status.");
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
                        return ExitCode::FAILURE;
                    }
                }
            }
            if !running.load(Ordering::SeqCst) {
                download_process.terminate().unwrap();
                tracing::info!("Waiting for download process to gracefully shutdown");
                download_process
                    .wait_timeout(Duration::from_secs(90))
                    .unwrap();
                tracing::info!("Download process terminated");
                return ExitCode::SUCCESS;
            }
            sleep(Duration::from_millis(100));
        }
    }

Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
291
292
293
294
295
296
297
298
299
300
301
    // Shared shutdown bool
    let shutdown = Arc::new(Mutex::new(false));
    // Shared shutdown channel
    // When shutting down, the main thread will wait for all senders to be dropped
    let (shutdown_sender, shutdown_receiver) = mpsc::channel();

    // Shared channel to track shard status
    let (status_sender, status_receiver) = mpsc::channel();

    // Start shard processes
    for rank in 0..num_shard {
302
        let model_id = model_id.clone();
303
        let revision = revision.clone();
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
304
305
        let uds_path = shard_uds_path.clone();
        let master_addr = master_addr.clone();
306
307
        let huggingface_hub_cache = huggingface_hub_cache.clone();
        let weights_cache_override = weights_cache_override.clone();
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
308
309
310
        let status_sender = status_sender.clone();
        let shutdown = shutdown.clone();
        let shutdown_sender = shutdown_sender.clone();
311
        let otlp_endpoint = otlp_endpoint.clone();
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
312
313
        thread::spawn(move || {
            shard_manager(
314
                model_id,
315
                revision,
316
                quantize,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
317
318
319
320
321
                uds_path,
                rank,
                num_shard,
                master_addr,
                master_port,
322
323
                huggingface_hub_cache,
                weights_cache_override,
324
                disable_custom_kernels,
325
326
                watermark_gamma,
                watermark_delta,
327
                otlp_endpoint,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
                status_sender,
                shutdown,
                shutdown_sender,
            )
        });
    }
    drop(shutdown_sender);

    // Wait for shard to start
    let mut shard_ready = 0;
    while running.load(Ordering::SeqCst) {
        match status_receiver.try_recv() {
            Ok(ShardStatus::Ready) => {
                shard_ready += 1;
                if shard_ready == num_shard {
                    break;
                }
            }
            Err(TryRecvError::Empty) => {
                sleep(Duration::from_millis(100));
            }
349
350
            Ok(ShardStatus::Failed((rank, err))) => {
                tracing::error!("Shard {} failed to start:\n{}", rank, err);
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
                shutdown_shards(shutdown, &shutdown_receiver);
                return ExitCode::FAILURE;
            }
            Err(TryRecvError::Disconnected) => {
                tracing::error!("Shard status channel disconnected");
                shutdown_shards(shutdown, &shutdown_receiver);
                return ExitCode::FAILURE;
            }
        }
    }

    // We might have received a termination signal
    if !running.load(Ordering::SeqCst) {
        shutdown_shards(shutdown, &shutdown_receiver);
        return ExitCode::SUCCESS;
    }

    // All shard started
    // Start webserver
    tracing::info!("Starting Webserver");
371
372
373
374
    let mut argv = vec![
        "text-generation-router".to_string(),
        "--max-concurrent-requests".to_string(),
        max_concurrent_requests.to_string(),
375
376
        "--max-best-of".to_string(),
        max_best_of.to_string(),
377
378
        "--max-stop-sequences".to_string(),
        max_stop_sequences.to_string(),
379
380
        "--max-input-length".to_string(),
        max_input_length.to_string(),
381
382
        "--max-total-tokens".to_string(),
        max_total_tokens.to_string(),
383
384
385
386
387
388
389
        "--max-batch-size".to_string(),
        max_batch_size.to_string(),
        "--max-waiting-tokens".to_string(),
        max_waiting_tokens.to_string(),
        "--port".to_string(),
        port.to_string(),
        "--master-shard-uds-path".to_string(),
390
        format!("{shard_uds_path}-0"),
391
        "--tokenizer-name".to_string(),
392
        model_id,
393
394
395
396
397
398
    ];

    if json_output {
        argv.push("--json-output".to_string());
    }

399
400
401
402
403
404
    // OpenTelemetry
    if let Some(otlp_endpoint) = otlp_endpoint {
        argv.push("--otlp-endpoint".to_string());
        argv.push(otlp_endpoint);
    }

405
406
407
408
409
410
    // CORS origins
    for origin in cors_allow_origin.into_iter() {
        argv.push("--cors-allow-origin".to_string());
        argv.push(origin);
    }

Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
411
    let mut webserver = match Popen::create(
412
        &argv,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
        PopenConfig {
            stdout: Redirection::Pipe,
            stderr: Redirection::Pipe,
            // Needed for the shutdown procedure
            setpgid: true,
            ..Default::default()
        },
    ) {
        Ok(p) => p,
        Err(err) => {
            tracing::error!("Failed to start webserver: {}", err);
            if let PopenError::IoError(err) = err {
                if err.kind() == io::ErrorKind::NotFound {
                    tracing::error!("text-generation-router not found in PATH");
                    tracing::error!("Please install it with `make install-router`")
                }
429
430
            } else {
                tracing::error!("{}", err);
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
            }

            shutdown_shards(shutdown, &shutdown_receiver);
            return ExitCode::FAILURE;
        }
    };

    // Redirect STDOUT and STDERR to the console
    let webserver_stdout = webserver.stdout.take().unwrap();
    let webserver_stderr = webserver.stderr.take().unwrap();

    thread::spawn(move || {
        let stdout = BufReader::new(webserver_stdout);
        let stderr = BufReader::new(webserver_stderr);
        for line in stdout.lines() {
            println!("{}", line.unwrap());
        }
        for line in stderr.lines() {
            println!("{}", line.unwrap());
        }
    });

    // Default exit code
    let mut exit_code = ExitCode::SUCCESS;

    while running.load(Ordering::SeqCst) {
457
458
        if let Ok(ShardStatus::Failed((rank, err))) = status_receiver.try_recv() {
            tracing::error!("Shard {rank} failed:\n{err}");
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
            exit_code = ExitCode::FAILURE;
            break;
        };

        match webserver.poll() {
            Some(_) => {
                tracing::error!("Webserver Crashed");
                shutdown_shards(shutdown, &shutdown_receiver);
                return ExitCode::FAILURE;
            }
            None => {
                sleep(Duration::from_millis(100));
            }
        };
    }

    // Graceful termination
    webserver.terminate().unwrap();
    tracing::info!("Waiting for webserver to gracefully shutdown");
    webserver.wait_timeout(Duration::from_secs(90)).unwrap();
    tracing::info!("Webserver terminated");
    shutdown_shards(shutdown, &shutdown_receiver);

    exit_code
}

#[derive(Debug)]
enum ShardStatus {
    Ready,
488
    Failed((usize, String)),
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
489
490
491
492
}

#[allow(clippy::too_many_arguments)]
fn shard_manager(
493
    model_id: String,
494
    revision: Option<String>,
495
    quantize: bool,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
496
497
498
499
500
    uds_path: String,
    rank: usize,
    world_size: usize,
    master_addr: String,
    master_port: usize,
501
502
    huggingface_hub_cache: Option<String>,
    weights_cache_override: Option<String>,
503
    disable_custom_kernels: bool,
504
505
    watermark_gamma: Option<f32>,
    watermark_delta: Option<f32>,
506
    otlp_endpoint: Option<String>,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
507
508
509
510
511
    status_sender: mpsc::Sender<ShardStatus>,
    shutdown: Arc<Mutex<bool>>,
    _shutdown_sender: mpsc::Sender<()>,
) {
    // Get UDS path
512
    let uds_string = format!("{uds_path}-{rank}");
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
513
514
515
516
517
518
    let uds = Path::new(&uds_string);
    // Clean previous runs
    fs::remove_file(uds).unwrap_or_default();

    // Process args
    let mut shard_argv = vec![
519
        "text-generation-server".to_string(),
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
520
        "serve".to_string(),
521
        model_id,
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
522
523
        "--uds-path".to_string(),
        uds_path,
524
        "--logger-level".to_string(),
525
        "INFO".to_string(),
526
        "--json-output".to_string(),
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
527
528
    ];

529
    // Activate tensor parallelism
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
530
531
532
533
    if world_size > 1 {
        shard_argv.push("--sharded".to_string());
    }

534
535
536
537
    if quantize {
        shard_argv.push("--quantize".to_string())
    }

538
    // Model optional revision
539
540
541
542
543
    if let Some(revision) = revision {
        shard_argv.push("--revision".to_string());
        shard_argv.push(revision)
    }

544
545
546
547
548
549
    // OpenTelemetry
    if let Some(otlp_endpoint) = otlp_endpoint {
        shard_argv.push("--otlp-endpoint".to_string());
        shard_argv.push(otlp_endpoint);
    }

550
551
552
553
554
555
556
557
558
559
560
561
    // Copy current process env
    let mut env: Vec<(OsString, OsString)> = env::vars_os().collect();

    // Torch Distributed Env vars
    env.push(("RANK".into(), rank.to_string().into()));
    env.push(("WORLD_SIZE".into(), world_size.to_string().into()));
    env.push(("MASTER_ADDR".into(), master_addr.into()));
    env.push(("MASTER_PORT".into(), master_port.to_string().into()));
    env.push(("NCCL_ASYNC_ERROR_HANDLING".into(), "1".into()));

    // Safetensors load fast
    env.push(("SAFETENSORS_FAST_GPU".into(), "1".into()));
Nicolas Patry's avatar
Nicolas Patry committed
562

563
    // Enable hf transfer for insane download speeds
564
565
566
567
568
569
570
571
572
573
    let enable_hf_transfer = env::var("HF_HUB_ENABLE_HF_TRANSFER").unwrap_or("1".to_string());
    env.push((
        "HF_HUB_ENABLE_HF_TRANSFER".into(),
        enable_hf_transfer.into(),
    ));

    // Parse Inference API token
    if let Ok(api_token) = env::var("HF_API_TOKEN") {
        env.push(("HUGGING_FACE_HUB_TOKEN".into(), api_token.into()))
    };
574

575
    // If huggingface_hub_cache is some, pass it to the shard
Nicolas Patry's avatar
Nicolas Patry committed
576
    // Useful when running inside a docker container
577
    if let Some(huggingface_hub_cache) = huggingface_hub_cache {
578
        env.push(("HUGGINGFACE_HUB_CACHE".into(), huggingface_hub_cache.into()));
Nicolas Patry's avatar
Nicolas Patry committed
579
    };
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
580

581
    // If weights_cache_override is some, pass it to the shard
582
    // Useful when running inside a HuggingFace Inference Endpoint
583
    if let Some(weights_cache_override) = weights_cache_override {
584
585
586
587
        env.push((
            "WEIGHTS_CACHE_OVERRIDE".into(),
            weights_cache_override.into(),
        ));
588
589
    };

590
591
592
593
594
    // If disable_custom_kernels is true, pass it to the shard as an env var
    if disable_custom_kernels {
        env.push(("DISABLE_CUSTOM_KERNELS".into(), "True".into()))
    }

595
596
597
598
599
600
601
602
603
604
    // Watermark Gamma
    if let Some(watermark_gamma) = watermark_gamma {
        env.push(("WATERMARK_GAMMA".into(), watermark_gamma.to_string().into()))
    }

    // Watermark Delta
    if let Some(watermark_delta) = watermark_delta {
        env.push(("WATERMARK_DELTA".into(), watermark_delta.to_string().into()))
    }

Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
605
    // Start process
606
    tracing::info!("Starting shard {rank}");
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
607
608
609
610
611
612
613
614
    let mut p = match Popen::create(
        &shard_argv,
        PopenConfig {
            stdout: Redirection::Pipe,
            stderr: Redirection::Pipe,
            // Needed for the shutdown procedure
            setpgid: true,
            // NCCL env vars
Nicolas Patry's avatar
Nicolas Patry committed
615
            env: Some(env),
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
616
617
618
619
620
621
622
            ..Default::default()
        },
    ) {
        Ok(p) => p,
        Err(err) => {
            if let PopenError::IoError(ref err) = err {
                if err.kind() == io::ErrorKind::NotFound {
623
                    tracing::error!("text-generation-server not found in PATH");
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
624
625
626
                    tracing::error!("Please install it with `make install-server`")
                }
            }
627
628
629
            status_sender
                .send(ShardStatus::Failed((rank, err.to_string())))
                .unwrap();
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
630
631
632
633
            return;
        }
    };

634
635
636
637
638
639
640
641
642
    // Redirect STDOUT to the console
    let shard_stdout = p.stdout.take().unwrap();

    thread::spawn(move || {
        // Enter shard-manager tracing span
        let stdout = BufReader::new(shard_stdout);
        let _span = tracing::span!(tracing::Level::INFO, "shard-manager", rank = rank).entered();
        for line in stdout.lines() {
            // Parse loguru logs
643
644
            if let Ok(log) = serde_json::from_str::<PythonLogMessage>(&line.unwrap()) {
                log.trace();
645
646
647
648
            }
        }
    });

Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
649
650
    let mut ready = false;
    let start_time = Instant::now();
Nicolas Patry's avatar
Nicolas Patry committed
651
    let mut wait_time = Instant::now();
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
652
653
654
    loop {
        // Process exited
        if p.poll().is_some() {
655
656
657
658
659
            let mut err = String::new();
            p.stderr.take().unwrap().read_to_string(&mut err).unwrap();
            status_sender
                .send(ShardStatus::Failed((rank, err)))
                .unwrap();
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
660
661
662
663
664
665
666
            return;
        }

        // We received a shutdown signal
        if *shutdown.lock().unwrap() {
            p.terminate().unwrap();
            let _ = p.wait_timeout(Duration::from_secs(90));
667
            tracing::info!("Shard {rank} terminated");
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
668
669
670
671
672
            return;
        }

        // Shard is ready
        if uds.exists() && !ready {
673
            tracing::info!("Shard {rank} ready in {:?}", start_time.elapsed());
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
674
675
            status_sender.send(ShardStatus::Ready).unwrap();
            ready = true;
676
        } else if !ready && wait_time.elapsed() > Duration::from_secs(10) {
677
            tracing::info!("Waiting for shard {rank} to be ready...");
678
            wait_time = Instant::now();
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
679
        }
Nicolas Patry's avatar
Nicolas Patry committed
680
        sleep(Duration::from_millis(100));
Olivier Dehaene's avatar
v0.1.0  
Olivier Dehaene committed
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
    }
}

fn shutdown_shards(shutdown: Arc<Mutex<bool>>, shutdown_receiver: &mpsc::Receiver<()>) {
    tracing::info!("Shutting down shards");
    // Update shutdown value to true
    // This will be picked up by the shard manager
    {
        let mut shutdown = shutdown.lock().unwrap();
        *shutdown = true;
    }

    // Wait for shards to shutdown
    // This will block till all shutdown_sender are dropped
    let _ = shutdown_receiver.recv();
}
697
698
699
700
701
702
703
704

fn num_cuda_devices() -> Option<usize> {
    if let Ok(cuda_visible_devices) = env::var("CUDA_VISIBLE_DEVICES") {
        let n_devices = cuda_visible_devices.split(',').count();
        return Some(n_devices);
    }
    None
}
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746

#[derive(Deserialize)]
#[serde(rename_all = "UPPERCASE")]
enum PythonLogLevelEnum {
    Trace,
    Debug,
    Info,
    Success,
    Warning,
    Error,
    Critical,
}

#[derive(Deserialize)]
struct PythonLogLevel {
    name: PythonLogLevelEnum,
}

#[derive(Deserialize)]
struct PythonLogRecord {
    level: PythonLogLevel,
}

#[derive(Deserialize)]
struct PythonLogMessage {
    text: String,
    record: PythonLogRecord,
}

impl PythonLogMessage {
    fn trace(&self) {
        match self.record.level.name {
            PythonLogLevelEnum::Trace => tracing::trace!("{}", self.text),
            PythonLogLevelEnum::Debug => tracing::debug!("{}", self.text),
            PythonLogLevelEnum::Info => tracing::info!("{}", self.text),
            PythonLogLevelEnum::Success => tracing::info!("{}", self.text),
            PythonLogLevelEnum::Warning => tracing::warn!("{}", self.text),
            PythonLogLevelEnum::Error => tracing::error!("{}", self.text),
            PythonLogLevelEnum::Critical => tracing::error!("{}", self.text),
        }
    }
}