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[model-gateway] move python to binding folder (#13295)

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This commit is contained in:
Simo Lin
2025-11-15 00:32:21 -08:00
committed by GitHub
parent 56fc483073
commit b732ffa404
28 changed files with 928 additions and 819 deletions
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716
sgl-router/bindings/python/src/lib.rs Normal file
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use pyo3::prelude::*;
use sglang_router::*;
use std::collections::HashMap;
// Define the enums with PyO3 bindings
#[pyclass(eq)]
#[derive(Clone, PartialEq, Debug)]
pub enum PolicyType {
Random,
RoundRobin,
CacheAware,
PowerOfTwo,
Bucket,
}
#[pyclass(eq)]
#[derive(Clone, PartialEq, Debug)]
pub enum BackendType {
Sglang,
Openai,
}
#[pyclass(eq)]
#[derive(Clone, PartialEq, Debug)]
pub enum HistoryBackendType {
Memory,
None,
Oracle,
Postgres,
}
#[pyclass]
#[derive(Clone, PartialEq)]
pub struct PyOracleConfig {
#[pyo3(get, set)]
pub wallet_path: Option<String>,
#[pyo3(get, set)]
pub connect_descriptor: Option<String>,
#[pyo3(get, set)]
pub username: Option<String>,
#[pyo3(get, set)]
pub password: Option<String>,
#[pyo3(get, set)]
pub pool_min: usize,
#[pyo3(get, set)]
pub pool_max: usize,
#[pyo3(get, set)]
pub pool_timeout_secs: u64,
}
impl std::fmt::Debug for PyOracleConfig {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("PyOracleConfig")
.field("wallet_path", &self.wallet_path)
.field("connect_descriptor", &"<redacted>")
.field("username", &self.username)
.field("password", &"<redacted>")
.field("pool_min", &self.pool_min)
.field("pool_max", &self.pool_max)
.field("pool_timeout_secs", &self.pool_timeout_secs)
.finish()
}
}
#[pymethods]
impl PyOracleConfig {
#[new]
#[pyo3(signature = (
password = None,
username = None,
connect_descriptor = None,
wallet_path = None,
pool_min = 1,
pool_max = 16,
pool_timeout_secs = 30,
))]
fn new(
password: Option<String>,
username: Option<String>,
connect_descriptor: Option<String>,
wallet_path: Option<String>,
pool_min: usize,
pool_max: usize,
pool_timeout_secs: u64,
) -> PyResult<Self> {
if pool_min == 0 {
return Err(pyo3::exceptions::PyValueError::new_err(
"pool_min must be at least 1",
));
}
if pool_max < pool_min {
return Err(pyo3::exceptions::PyValueError::new_err(
"pool_max must be >= pool_min",
));
}
Ok(PyOracleConfig {
wallet_path,
connect_descriptor,
username,
password,
pool_min,
pool_max,
pool_timeout_secs,
})
}
}
impl PyOracleConfig {
pub fn to_config_oracle(&self) -> config::OracleConfig {
config::OracleConfig {
wallet_path: self.wallet_path.clone(),
connect_descriptor: self.connect_descriptor.clone().unwrap_or_default(),
username: self.username.clone().unwrap_or_default(),
password: self.password.clone().unwrap_or_default(),
pool_min: self.pool_min,
pool_max: self.pool_max,
pool_timeout_secs: self.pool_timeout_secs,
}
}
}
#[pyclass]
#[derive(Debug, Clone, PartialEq)]
pub struct PyPostgresConfig {
#[pyo3(get, set)]
pub db_url: Option<String>,
#[pyo3(get, set)]
pub pool_max: usize,
}
#[pymethods]
impl PyPostgresConfig {
#[new]
#[pyo3(signature = (db_url = None,pool_max = 16,))]
fn new(db_url: Option<String>, pool_max: usize) -> PyResult<Self> {
Ok(PyPostgresConfig { db_url, pool_max })
}
}
impl PyPostgresConfig {
pub fn to_config_postgres(&self) -> config::PostgresConfig {
config::PostgresConfig {
db_url: self.db_url.clone().unwrap_or_default(),
pool_max: self.pool_max,
}
}
}
#[pyclass]
#[derive(Debug, Clone, PartialEq)]
struct Router {
host: String,
port: u16,
worker_urls: Vec<String>,
policy: PolicyType,
worker_startup_timeout_secs: u64,
worker_startup_check_interval: u64,
cache_threshold: f32,
balance_abs_threshold: usize,
balance_rel_threshold: f32,
eviction_interval_secs: u64,
max_tree_size: usize,
max_payload_size: usize,
dp_aware: bool,
api_key: Option<String>,
log_dir: Option<String>,
log_level: Option<String>,
service_discovery: bool,
selector: HashMap<String, String>,
service_discovery_port: u16,
service_discovery_namespace: Option<String>,
prefill_selector: HashMap<String, String>,
decode_selector: HashMap<String, String>,
bootstrap_port_annotation: String,
prometheus_port: Option<u16>,
prometheus_host: Option<String>,
request_timeout_secs: u64,
request_id_headers: Option<Vec<String>>,
pd_disaggregation: bool,
bucket_adjust_interval_secs: usize,
prefill_urls: Option<Vec<(String, Option<u16>)>>,
decode_urls: Option<Vec<String>>,
prefill_policy: Option<PolicyType>,
decode_policy: Option<PolicyType>,
max_concurrent_requests: i32,
cors_allowed_origins: Vec<String>,
retry_max_retries: u32,
retry_initial_backoff_ms: u64,
retry_max_backoff_ms: u64,
retry_backoff_multiplier: f32,
retry_jitter_factor: f32,
disable_retries: bool,
cb_failure_threshold: u32,
cb_success_threshold: u32,
cb_timeout_duration_secs: u64,
cb_window_duration_secs: u64,
disable_circuit_breaker: bool,
health_failure_threshold: u32,
health_success_threshold: u32,
health_check_timeout_secs: u64,
health_check_interval_secs: u64,
health_check_endpoint: String,
enable_igw: bool,
queue_size: usize,
queue_timeout_secs: u64,
rate_limit_tokens_per_second: Option<i32>,
connection_mode: core::ConnectionMode,
model_path: Option<String>,
tokenizer_path: Option<String>,
chat_template: Option<String>,
tokenizer_cache_enable_l0: bool,
tokenizer_cache_l0_max_entries: usize,
tokenizer_cache_enable_l1: bool,
tokenizer_cache_l1_max_memory: usize,
reasoning_parser: Option<String>,
tool_call_parser: Option<String>,
mcp_config_path: Option<String>,
backend: BackendType,
history_backend: HistoryBackendType,
oracle_config: Option<PyOracleConfig>,
postgres_config: Option<PyPostgresConfig>,
client_cert_path: Option<String>,
client_key_path: Option<String>,
ca_cert_paths: Vec<String>,
}
impl Router {
fn determine_connection_mode(worker_urls: &[String]) -> core::ConnectionMode {
for url in worker_urls {
if url.starts_with("grpc://") || url.starts_with("grpcs://") {
return core::ConnectionMode::Grpc { port: None };
}
}
core::ConnectionMode::Http
}
pub fn to_router_config(&self) -> config::ConfigResult<config::RouterConfig> {
use config::{
DiscoveryConfig, MetricsConfig, PolicyConfig as ConfigPolicyConfig, RoutingMode,
};
let convert_policy = |policy: &PolicyType| -> ConfigPolicyConfig {
match policy {
PolicyType::Random => ConfigPolicyConfig::Random,
PolicyType::RoundRobin => ConfigPolicyConfig::RoundRobin,
PolicyType::CacheAware => ConfigPolicyConfig::CacheAware {
cache_threshold: self.cache_threshold,
balance_abs_threshold: self.balance_abs_threshold,
balance_rel_threshold: self.balance_rel_threshold,
eviction_interval_secs: self.eviction_interval_secs,
max_tree_size: self.max_tree_size,
},
PolicyType::PowerOfTwo => ConfigPolicyConfig::PowerOfTwo {
load_check_interval_secs: 5,
},
PolicyType::Bucket => ConfigPolicyConfig::Bucket {
balance_abs_threshold: self.balance_abs_threshold,
balance_rel_threshold: self.balance_rel_threshold,
bucket_adjust_interval_secs: self.bucket_adjust_interval_secs,
},
}
};
let mode = if self.enable_igw {
RoutingMode::Regular {
worker_urls: vec![],
}
} else if matches!(self.backend, BackendType::Openai) {
RoutingMode::OpenAI {
worker_urls: self.worker_urls.clone(),
}
} else if self.pd_disaggregation {
RoutingMode::PrefillDecode {
prefill_urls: self.prefill_urls.clone().unwrap_or_default(),
decode_urls: self.decode_urls.clone().unwrap_or_default(),
prefill_policy: self.prefill_policy.as_ref().map(convert_policy),
decode_policy: self.decode_policy.as_ref().map(convert_policy),
}
} else {
RoutingMode::Regular {
worker_urls: self.worker_urls.clone(),
}
};
let policy = convert_policy(&self.policy);
let discovery = if self.service_discovery {
Some(DiscoveryConfig {
enabled: true,
namespace: self.service_discovery_namespace.clone(),
port: self.service_discovery_port,
check_interval_secs: 60,
selector: self.selector.clone(),
prefill_selector: self.prefill_selector.clone(),
decode_selector: self.decode_selector.clone(),
bootstrap_port_annotation: self.bootstrap_port_annotation.clone(),
})
} else {
None
};
let metrics = match (self.prometheus_port, self.prometheus_host.as_ref()) {
(Some(port), Some(host)) => Some(MetricsConfig {
port,
host: host.clone(),
}),
_ => None,
};
let history_backend = match self.history_backend {
HistoryBackendType::Memory => config::HistoryBackend::Memory,
HistoryBackendType::None => config::HistoryBackend::None,
HistoryBackendType::Oracle => config::HistoryBackend::Oracle,
HistoryBackendType::Postgres => config::HistoryBackend::Postgres,
};
let oracle = if matches!(self.history_backend, HistoryBackendType::Oracle) {
self.oracle_config
.as_ref()
.map(|cfg| cfg.to_config_oracle())
} else {
None
};
let postgres_config = if matches!(self.history_backend, HistoryBackendType::Postgres) {
self.postgres_config
.as_ref()
.map(|cfg| cfg.to_config_postgres())
} else {
None
};
config::RouterConfig::builder()
.mode(mode)
.policy(policy)
.host(&self.host)
.port(self.port)
.connection_mode(self.connection_mode.clone())
.max_payload_size(self.max_payload_size)
.request_timeout_secs(self.request_timeout_secs)
.worker_startup_timeout_secs(self.worker_startup_timeout_secs)
.worker_startup_check_interval_secs(self.worker_startup_check_interval)
.max_concurrent_requests(self.max_concurrent_requests)
.queue_size(self.queue_size)
.queue_timeout_secs(self.queue_timeout_secs)
.cors_allowed_origins(self.cors_allowed_origins.clone())
.retry_config(config::RetryConfig {
max_retries: self.retry_max_retries,
initial_backoff_ms: self.retry_initial_backoff_ms,
max_backoff_ms: self.retry_max_backoff_ms,
backoff_multiplier: self.retry_backoff_multiplier,
jitter_factor: self.retry_jitter_factor,
})
.circuit_breaker_config(config::CircuitBreakerConfig {
failure_threshold: self.cb_failure_threshold,
success_threshold: self.cb_success_threshold,
timeout_duration_secs: self.cb_timeout_duration_secs,
window_duration_secs: self.cb_window_duration_secs,
})
.health_check_config(config::HealthCheckConfig {
failure_threshold: self.health_failure_threshold,
success_threshold: self.health_success_threshold,
timeout_secs: self.health_check_timeout_secs,
check_interval_secs: self.health_check_interval_secs,
endpoint: self.health_check_endpoint.clone(),
})
.tokenizer_cache(config::TokenizerCacheConfig {
enable_l0: self.tokenizer_cache_enable_l0,
l0_max_entries: self.tokenizer_cache_l0_max_entries,
enable_l1: self.tokenizer_cache_enable_l1,
l1_max_memory: self.tokenizer_cache_l1_max_memory,
})
.history_backend(history_backend)
.maybe_api_key(self.api_key.as_ref())
.maybe_discovery(discovery)
.maybe_metrics(metrics)
.maybe_log_dir(self.log_dir.as_ref())
.maybe_log_level(self.log_level.as_ref())
.maybe_request_id_headers(self.request_id_headers.clone())
.maybe_rate_limit_tokens_per_second(self.rate_limit_tokens_per_second)
.maybe_model_path(self.model_path.as_ref())
.maybe_tokenizer_path(self.tokenizer_path.as_ref())
.maybe_chat_template(self.chat_template.as_ref())
.maybe_oracle(oracle)
.maybe_postgres(postgres_config)
.maybe_reasoning_parser(self.reasoning_parser.as_ref())
.maybe_tool_call_parser(self.tool_call_parser.as_ref())
.maybe_mcp_config_path(self.mcp_config_path.as_ref())
.dp_aware(self.dp_aware)
.retries(!self.disable_retries)
.circuit_breaker(!self.disable_circuit_breaker)
.igw(self.enable_igw)
.maybe_client_cert_and_key(
self.client_cert_path.as_ref(),
self.client_key_path.as_ref(),
)
.add_ca_certificates(self.ca_cert_paths.clone())
.build()
}
}
#[pymethods]
impl Router {
#[new]
#[pyo3(signature = (
worker_urls,
policy = PolicyType::RoundRobin,
host = String::from("0.0.0.0"),
port = 3001,
worker_startup_timeout_secs = 600,
worker_startup_check_interval = 30,
cache_threshold = 0.3,
balance_abs_threshold = 64,
balance_rel_threshold = 1.5,
eviction_interval_secs = 120,
max_tree_size = 2usize.pow(26),
max_payload_size = 512 * 1024 * 1024,
dp_aware = false,
api_key = None,
log_dir = None,
log_level = None,
service_discovery = false,
selector = HashMap::new(),
service_discovery_port = 80,
service_discovery_namespace = None,
prefill_selector = HashMap::new(),
decode_selector = HashMap::new(),
bootstrap_port_annotation = String::from("sglang.ai/bootstrap-port"),
prometheus_port = None,
prometheus_host = None,
request_timeout_secs = 1800,
request_id_headers = None,
pd_disaggregation = false,
bucket_adjust_interval_secs = 5,
prefill_urls = None,
decode_urls = None,
prefill_policy = None,
decode_policy = None,
max_concurrent_requests = -1,
cors_allowed_origins = vec![],
retry_max_retries = 5,
retry_initial_backoff_ms = 50,
retry_max_backoff_ms = 30_000,
retry_backoff_multiplier = 1.5,
retry_jitter_factor = 0.2,
disable_retries = false,
cb_failure_threshold = 10,
cb_success_threshold = 3,
cb_timeout_duration_secs = 60,
cb_window_duration_secs = 120,
disable_circuit_breaker = false,
health_failure_threshold = 3,
health_success_threshold = 2,
health_check_timeout_secs = 5,
health_check_interval_secs = 60,
health_check_endpoint = String::from("/health"),
enable_igw = false,
queue_size = 100,
queue_timeout_secs = 60,
rate_limit_tokens_per_second = None,
model_path = None,
tokenizer_path = None,
chat_template = None,
tokenizer_cache_enable_l0 = false,
tokenizer_cache_l0_max_entries = 10000,
tokenizer_cache_enable_l1 = false,
tokenizer_cache_l1_max_memory = 52428800,
reasoning_parser = None,
tool_call_parser = None,
mcp_config_path = None,
backend = BackendType::Sglang,
history_backend = HistoryBackendType::Memory,
oracle_config = None,
postgres_config = None,
client_cert_path = None,
client_key_path = None,
ca_cert_paths = vec![],
))]
#[allow(clippy::too_many_arguments)]
fn new(
worker_urls: Vec<String>,
policy: PolicyType,
host: String,
port: u16,
worker_startup_timeout_secs: u64,
worker_startup_check_interval: u64,
cache_threshold: f32,
balance_abs_threshold: usize,
balance_rel_threshold: f32,
eviction_interval_secs: u64,
max_tree_size: usize,
max_payload_size: usize,
dp_aware: bool,
api_key: Option<String>,
log_dir: Option<String>,
log_level: Option<String>,
service_discovery: bool,
selector: HashMap<String, String>,
service_discovery_port: u16,
service_discovery_namespace: Option<String>,
prefill_selector: HashMap<String, String>,
decode_selector: HashMap<String, String>,
bootstrap_port_annotation: String,
prometheus_port: Option<u16>,
prometheus_host: Option<String>,
request_timeout_secs: u64,
request_id_headers: Option<Vec<String>>,
pd_disaggregation: bool,
bucket_adjust_interval_secs: usize,
prefill_urls: Option<Vec<(String, Option<u16>)>>,
decode_urls: Option<Vec<String>>,
prefill_policy: Option<PolicyType>,
decode_policy: Option<PolicyType>,
max_concurrent_requests: i32,
cors_allowed_origins: Vec<String>,
retry_max_retries: u32,
retry_initial_backoff_ms: u64,
retry_max_backoff_ms: u64,
retry_backoff_multiplier: f32,
retry_jitter_factor: f32,
disable_retries: bool,
cb_failure_threshold: u32,
cb_success_threshold: u32,
cb_timeout_duration_secs: u64,
cb_window_duration_secs: u64,
disable_circuit_breaker: bool,
health_failure_threshold: u32,
health_success_threshold: u32,
health_check_timeout_secs: u64,
health_check_interval_secs: u64,
health_check_endpoint: String,
enable_igw: bool,
queue_size: usize,
queue_timeout_secs: u64,
rate_limit_tokens_per_second: Option<i32>,
model_path: Option<String>,
tokenizer_path: Option<String>,
chat_template: Option<String>,
tokenizer_cache_enable_l0: bool,
tokenizer_cache_l0_max_entries: usize,
tokenizer_cache_enable_l1: bool,
tokenizer_cache_l1_max_memory: usize,
reasoning_parser: Option<String>,
tool_call_parser: Option<String>,
mcp_config_path: Option<String>,
backend: BackendType,
history_backend: HistoryBackendType,
oracle_config: Option<PyOracleConfig>,
postgres_config: Option<PyPostgresConfig>,
client_cert_path: Option<String>,
client_key_path: Option<String>,
ca_cert_paths: Vec<String>,
) -> PyResult<Self> {
let mut all_urls = worker_urls.clone();
if let Some(ref prefill_urls) = prefill_urls {
for (url, _) in prefill_urls {
all_urls.push(url.clone());
}
}
if let Some(ref decode_urls) = decode_urls {
all_urls.extend(decode_urls.clone());
}
let connection_mode = Self::determine_connection_mode(&all_urls);
Ok(Router {
host,
port,
worker_urls,
policy,
worker_startup_timeout_secs,
worker_startup_check_interval,
cache_threshold,
balance_abs_threshold,
balance_rel_threshold,
eviction_interval_secs,
max_tree_size,
max_payload_size,
dp_aware,
api_key,
log_dir,
log_level,
service_discovery,
selector,
service_discovery_port,
service_discovery_namespace,
prefill_selector,
decode_selector,
bootstrap_port_annotation,
prometheus_port,
prometheus_host,
request_timeout_secs,
request_id_headers,
pd_disaggregation,
bucket_adjust_interval_secs,
prefill_urls,
decode_urls,
prefill_policy,
decode_policy,
max_concurrent_requests,
cors_allowed_origins,
retry_max_retries,
retry_initial_backoff_ms,
retry_max_backoff_ms,
retry_backoff_multiplier,
retry_jitter_factor,
disable_retries,
cb_failure_threshold,
cb_success_threshold,
cb_timeout_duration_secs,
cb_window_duration_secs,
disable_circuit_breaker,
health_failure_threshold,
health_success_threshold,
health_check_timeout_secs,
health_check_interval_secs,
health_check_endpoint,
enable_igw,
queue_size,
queue_timeout_secs,
rate_limit_tokens_per_second,
connection_mode,
model_path,
tokenizer_path,
chat_template,
tokenizer_cache_enable_l0,
tokenizer_cache_l0_max_entries,
tokenizer_cache_enable_l1,
tokenizer_cache_l1_max_memory,
reasoning_parser,
tool_call_parser,
mcp_config_path,
backend,
history_backend,
oracle_config,
postgres_config,
client_cert_path,
client_key_path,
ca_cert_paths,
})
}
fn start(&self) -> PyResult<()> {
use metrics::PrometheusConfig;
let router_config = self.to_router_config().map_err(|e| {
pyo3::exceptions::PyValueError::new_err(format!("Configuration error: {}", e))
})?;
router_config.validate().map_err(|e| {
pyo3::exceptions::PyValueError::new_err(format!(
"Configuration validation failed: {}",
e
))
})?;
let service_discovery_config = if self.service_discovery {
Some(service_discovery::ServiceDiscoveryConfig {
enabled: true,
selector: self.selector.clone(),
check_interval: std::time::Duration::from_secs(60),
port: self.service_discovery_port,
namespace: self.service_discovery_namespace.clone(),
pd_mode: self.pd_disaggregation,
prefill_selector: self.prefill_selector.clone(),
decode_selector: self.decode_selector.clone(),
bootstrap_port_annotation: self.bootstrap_port_annotation.clone(),
})
} else {
None
};
let prometheus_config = Some(PrometheusConfig {
port: self.prometheus_port.unwrap_or(29000),
host: self
.prometheus_host
.clone()
.unwrap_or_else(|| "127.0.0.1".to_string()),
});
let runtime = tokio::runtime::Runtime::new()
.map_err(|e| pyo3::exceptions::PyRuntimeError::new_err(e.to_string()))?;
runtime.block_on(async move {
server::startup(server::ServerConfig {
host: self.host.clone(),
port: self.port,
router_config,
max_payload_size: self.max_payload_size,
log_dir: self.log_dir.clone(),
log_level: self.log_level.clone(),
service_discovery_config,
prometheus_config,
request_timeout_secs: self.request_timeout_secs,
request_id_headers: self.request_id_headers.clone(),
})
.await
.map_err(|e| pyo3::exceptions::PyRuntimeError::new_err(e.to_string()))
})
}
}
#[pymodule]
fn sglang_router_rs(m: &Bound<'_, PyModule>) -> PyResult<()> {
m.add_class::<PolicyType>()?;
m.add_class::<BackendType>()?;
m.add_class::<HistoryBackendType>()?;
m.add_class::<PyOracleConfig>()?;
m.add_class::<PyPostgresConfig>()?;
m.add_class::<Router>()?;
Ok(())
}