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Implement Python runtime crate and shared socket (#1399) 

* Add the Python runtime crate `aws-smithy-http-server-python`
* Implement SharedSocket support.
* Implement logging to tracing support.
This commit is contained in:
Matteo Bigoi 2022-05-20 18:08:57 +01:00 committed by GitHub
parent 2cd82cb862
commit ebabb98745
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11 changed files with 557 additions and 10 deletions
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10
CODEOWNERS
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@ -1,5 +1,5 @@
* @awslabs/rust-sdk-owners
/codegen-server/ @awslabs/smithy-rs-server
/codegen-server-test/ @awslabs/smithy-rs-server
/rust-runtime/aws-smithy-http-server/ @awslabs/smithy-rs-server
/.github/workflows/server-benchmark.yml @awslabs/smithy-rs-server
* @awslabs/rust-sdk-owners
/codegen-server/ @awslabs/smithy-rs-server
/codegen-server-test/ @awslabs/smithy-rs-server
/rust-runtime/aws-smithy-http-server/ @awslabs/smithy-rs-server
/rust-runtime/aws-smithy-http-server-python/ @awslabs/smithy-rs-server

1
rust-runtime/Cargo.toml
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@ -15,4 +15,5 @@ members = [
"aws-smithy-types-convert",
"aws-smithy-xml",
"aws-smithy-http-server",
"aws-smithy-http-server-python",
]

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rust-runtime/aws-smithy-http-server-python/Cargo.toml Normal file
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@ -0,0 +1,31 @@
[package]
name = "aws-smithy-http-server-python"
version = "0.0.0-smithy-rs-head"
authors = ["Smithy Rust Server <smithy-rs-server@amazon.com>"]
edition = "2021"
license = "Apache-2.0"
repository = "https://github.com/awslabs/smithy-rs"
keywords = ["smithy", "framework", "web", "api", "aws"]
categories = ["asynchronous", "web-programming", "api-bindings"]
description = """
Python server runtime for Smithy Rust Server Framework.
"""
# until this is not stable, it is not publishable.
publish = false
[dependencies]
pyo3 = { version = "0.16" }
pyo3-asyncio = { version = "0.16", features = ["attributes", "tokio-runtime"] }
socket2 = { version = "0.4", features = ["all"] }
tokio = { version = "1", features = ["full"] }
tracing = "0.1.34"
tracing-subscriber = { version = "0.3", features = ["env-filter"] }
[dev-dependencies]
pretty_assertions = "1"
[package.metadata.docs.rs]
all-features = true
targets = ["x86_64-unknown-linux-gnu"]
rustdoc-args = ["--cfg", "docsrs"]
# End of docs.rs metadata

202
rust-runtime/aws-smithy-http-server-python/LICENSE Normal file
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@ -0,0 +1,202 @@
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7
rust-runtime/aws-smithy-http-server-python/README.md Normal file
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@ -0,0 +1,7 @@
# aws-smithy-http-server-python
Server libraries for smithy-rs generated servers, targeting pure Python business logic.
<!-- anchor_start:footer -->
This crate is part of the [AWS SDK for Rust](https://awslabs.github.io/aws-sdk-rust/) and the [smithy-rs](https://github.com/awslabs/smithy-rs) code generator. In most cases, it should not be used directly.
<!-- anchor_end:footer -->

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rust-runtime/aws-smithy-http-server-python/src/lib.rs Normal file
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@ -0,0 +1,20 @@
/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
//! Rust/Python bindings, runtime and utilities.
//!
//! This crates implements all the generic code needed to start and manage
//! a Smithy Rust HTTP server where the business logic is implemented in Python,
//! leveraging [PyO3].
//!
//! [PyO3]: https://pyo3.rs/
mod logging;
mod socket;
#[doc(inline)]
pub use logging::{setup, LogLevel};
#[doc(inline)]
pub use socket::SharedSocket;

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rust-runtime/aws-smithy-http-server-python/src/logging.rs Normal file
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@ -0,0 +1,185 @@
/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
//! Rust `tracing` and Python `logging` setup and utilities.
use pyo3::prelude::*;
use tracing::Level;
use tracing_subscriber::filter::LevelFilter;
use tracing_subscriber::{prelude::*, EnvFilter};
/// Setup `tracing::subscriber` reading the log level from RUST_LOG environment variable
/// and inject the custom Python `logger` into the interpreter.
pub fn setup(py: Python, level: LogLevel) -> PyResult<()> {
let format = tracing_subscriber::fmt::layer()
.with_ansi(true)
.with_level(true);
match EnvFilter::try_from_default_env() {
Ok(filter) => {
let level: LogLevel = filter.to_string().into();
tracing_subscriber::registry()
.with(format)
.with(filter)
.init();
setup_python_logging(py, level)?;
}
Err(_) => {
tracing_subscriber::registry()
.with(format)
.with(LevelFilter::from_level(level.into()))
.init();
setup_python_logging(py, level)?;
}
}
Ok(())
}
/// This custom logger enum exported to Python can be used to configure the
/// both the Rust `tracing` and Python `logging` levels.
/// We cannot export directly `tracing::Level` to Python.
#[pyclass]
#[derive(Debug, Clone, Copy)]
pub enum LogLevel {
Trace,
Debug,
Info,
Warn,
Error,
}
/// `From<LogLevel>` is used to convert `LogLevel` to the correct string
/// needed by Python `logging` module.
impl From<LogLevel> for String {
fn from(other: LogLevel) -> String {
match other {
LogLevel::Error => "ERROR".into(),
LogLevel::Warn => "WARN".into(),
LogLevel::Info => "INFO".into(),
_ => "DEBUG".into(),
}
}
}
/// `From<String>` is used to covert `tracing::EnvFilter` into `LogLevel`.
impl From<String> for LogLevel {
fn from(other: String) -> LogLevel {
match other.as_str() {
"error" => LogLevel::Error,
"warn" => LogLevel::Warn,
"info" => LogLevel::Info,
"debug" => LogLevel::Debug,
_ => LogLevel::Trace,
}
}
}
/// `From<LogLevel>` is used to covert `LogLevel` into `tracing::EnvFilter`.
impl From<LogLevel> for Level {
fn from(other: LogLevel) -> Level {
match other {
LogLevel::Debug => Level::DEBUG,
LogLevel::Info => Level::INFO,
LogLevel::Warn => Level::WARN,
LogLevel::Error => Level::ERROR,
_ => Level::TRACE,
}
}
}
/// Modifies the Python `logging` module to deliver its log messages using `tracing::Subscriber` events.
///
/// To achieve this goal, the following changes are made to the module:
/// - A new builtin function `logging.python_tracing` transcodes `logging.LogRecord`s to `tracing::Event`s. This function
/// is not exported in `logging.__all__`, as it is not intended to be called directly.
/// - A new class `logging.RustTracing` provides a `logging.Handler` that delivers all records to `python_tracing`.
/// - `logging.basicConfig` is changed to use `logging.HostHandler` by default.
///
/// Since any call like `logging.warn(...)` sets up logging via `logging.basicConfig`, all log messages are now
/// delivered to `crate::logging`, which will send them to `tracing::event!`.
fn setup_python_logging(py: Python, level: LogLevel) -> PyResult<()> {
let logging = py.import("logging")?;
logging.setattr("python_tracing", wrap_pyfunction!(python_tracing, logging)?)?;
let level: String = level.into();
let pycode = format!(
r#"
class RustTracing(Handler):
""" Python logging to Rust tracing handler. """
def __init__(self, level=0):
super().__init__(level=level)
def emit(self, record):
python_tracing(record)
# Store the old basicConfig in the local namespace.
oldBasicConfig = basicConfig
def basicConfig(*pargs, **kwargs):
""" Reimplement basicConfig to hijack the root logger. """
if "handlers" not in kwargs:
kwargs["handlers"] = [RustTracing()]
kwargs["level"] = {level}
return oldBasicConfig(*pargs, **kwargs)
"#,
);
py.run(&pycode, Some(logging.dict()), None)?;
let all = logging.index()?;
all.append("RustTracing")?;
Ok(())
}
/// Consumes a Python `logging.LogRecord` and emits a Rust `tracing::Event` instead.
#[cfg(not(test))]
#[pyfunction]
fn python_tracing(record: &PyAny) -> PyResult<()> {
let level = record.getattr("levelno")?;
let message = record.getattr("getMessage")?.call0()?;
let module = record.getattr("module")?;
let filename = record.getattr("filename")?;
let line = record.getattr("lineno")?;
match level.extract()? {
40u8 => tracing::event!(Level::ERROR, %module, %filename, %line, "{message}"),
30u8 => tracing::event!(Level::WARN, %module, %filename, %line, "{message}"),
20u8 => tracing::event!(Level::INFO, %module, %filename, %line, "{message}"),
10u8 => tracing::event!(Level::DEBUG, %module, %filename, %line, "{message}"),
_ => tracing::event!(Level::TRACE, %module, %filename, %line, "{message}"),
};
Ok(())
}
#[cfg(test)]
#[pyfunction]
fn python_tracing(record: &PyAny) -> PyResult<()> {
let message = record.getattr("getMessage")?.call0()?;
pretty_assertions::assert_eq!(message.to_string(), "a message");
Ok(())
}
#[cfg(test)]
mod tests {
use super::*;
use std::sync::Once;
static INIT: Once = Once::new();
fn initialize() {
INIT.call_once(|| {
pyo3::prepare_freethreaded_python();
});
}
#[test]
fn tracing_handler_is_injected_in_python() {
initialize();
Python::with_gil(|py| {
setup_python_logging(py, LogLevel::Info).unwrap();
let logging = py.import("logging").unwrap();
logging.call_method1("info", ("a message",)).unwrap();
});
}
}

102
rust-runtime/aws-smithy-http-server-python/src/socket.rs Normal file
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@ -0,0 +1,102 @@
/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
//! Socket implementation that can be shared between multiple Python processes.
use pyo3::prelude::*;
use socket2::{Domain, Protocol, Socket, Type};
use std::net::SocketAddr;
/// Socket implementation that can be shared between multiple Python processes.
///
/// Python cannot handle true multi-threaded applications due to the [GIL],
/// often resulting in reduced performance and only one core used by the application.
/// To work around this, Python web applications usually create a socket with
/// SO_REUSEADDR and SO_REUSEPORT enabled that can be shared between multiple
/// Python processes, allowing you to maximize performance and use all available
/// computing capacity of the host.
///
/// [GIL]: https://wiki.python.org/moin/GlobalInterpreterLock
#[pyclass]
#[derive(Debug)]
pub struct SharedSocket {
pub(crate) inner: Socket,
}
#[pymethods]
impl SharedSocket {
/// Create a new UNIX `SharedSocket` from an address, port and backlog.
/// If not specified, the backlog defaults to 1024 connections.
#[new]
#[cfg(not(target_os = "windows"))]
pub fn new(address: String, port: i32, backlog: Option<i32>) -> PyResult<Self> {
let address: SocketAddr = format!("{}:{}", address, port).parse()?;
let domain = if address.is_ipv6() {
Domain::IPV6
} else {
Domain::IPV4
};
tracing::info!("Shared socket listening on {address}, IP version: {domain:?}");
let socket = Socket::new(domain, Type::STREAM, Some(Protocol::TCP))?;
// Set value for the `SO_REUSEPORT` and `SO_REUSEADDR` options on this socket.
// This indicates that further calls to `bind` may allow reuse of local
// addresses. For IPv4 sockets this means that a socket may bind even when
// there's a socket already listening on this port.
socket.set_reuse_port(true)?;
socket.set_reuse_address(true)?;
socket.bind(&address.into())?;
socket.listen(backlog.unwrap_or(1024))?;
Ok(SharedSocket { inner: socket })
}
/// Create a new Windows `SharedSocket` from an address, port and backlog.
/// If not specified, the backlog defaults to 1024 connections.
#[new]
#[cfg(target_os = "windows")]
pub fn new(address: String, port: i32, backlog: Option<i32>) -> PyResult<Self> {
let address: SocketAddr = format!("{}:{}", address, port).parse()?;
let domain = if address.is_ipv6() {
Domain::IPV6
} else {
Domain::IPV4
};
tracing::info!("Shared socket listening on {address}, IP version: {domain:?}");
let socket = Socket::new(domain, Type::STREAM, Some(Protocol::TCP))?;
// `SO_REUSEPORT` is not available on Windows.
socket.set_reuse_address(true)?;
socket.bind(&address.into())?;
socket.listen(backlog.unwrap_or(1024))?;
Ok(SharedSocket { inner: socket })
}
/// Clone the inner socket allowing it to be shared between multiple
/// Python processes.
pub fn try_clone(&self) -> PyResult<SharedSocket> {
let copied = self.inner.try_clone()?;
Ok(SharedSocket { inner: copied })
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn socket_can_bind_on_random_port() {
let _socket = SharedSocket::new("127.0.0.1".to_owned(), 0, None).unwrap();
#[cfg(not(target_os = "windows"))]
assert!(_socket.inner.is_listener().is_ok());
}
#[test]
#[cfg(not(target_os = "windows"))]
fn socket_can_be_cloned() {
let socket = SharedSocket::new("127.0.0.1".to_owned(), 0, None).unwrap();
let _cloned_socket = socket.try_clone().unwrap();
#[cfg(not(target_os = "windows"))]
assert!(_cloned_socket.inner.is_listener().is_ok());
}
}

6
rust-runtime/aws-smithy-http-server/Cargo.toml
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@ -9,8 +9,6 @@ keywords = ["smithy", "framework", "web", "api", "aws"]
categories = ["asynchronous", "web-programming", "api-bindings"]
description = """
Server runtime for Smithy Rust Server Framework.
NOTE: THIS IS HIGHLY EXPERIMENTAL AND SHOULD NOT BE USED YET.
"""
# until this is not stable, it is not publishable.
publish = false
@ -30,13 +28,13 @@ mime = "0.3"
nom = "7"
paste = "1"
pin-project-lite = "0.2"
regex = "1.0"
regex = "1.5.5"
serde_urlencoded = "0.7"
strum_macros = "0.24"
thiserror = "1"
tokio = { version = "1.0", features = ["full"] }
tower = { version = "0.4.11", features = ["util", "make"], default-features = false }
tower-http = { version = "0.2.1", features = ["add-extension", "map-response-body"] }
tower-http = { version = "0.3", features = ["add-extension", "map-response-body"] }
[dev-dependencies]
pretty_assertions = "1"

1
tools/Dockerfile
View File

@ -123,6 +123,7 @@ RUN set -eux; \
openssl-devel \
pkgconfig \
python3 \
python3-devel \
shadow-utils; \
yum clean all; \
rm -rf /var/cache/yum; \

2
tools/sdk-lints/src/lint_cargo_toml.rs
View File

@ -53,7 +53,7 @@ struct Metadata {
const RUST_SDK_TEAM: &str = "AWS Rust SDK Team <aws-sdk-rust@amazon.com>";
const SERVER_TEAM: &str = "Smithy Rust Server <smithy-rs-server@amazon.com>";
const SERVER_CRATES: &[&str] = &["aws-smithy-http-server"];
const SERVER_CRATES: &[&str] = &["aws-smithy-http-server", "aws-smithy-http-server-python"];
/// Check crate licensing
///