269 lines
9.6 KiB
Rust
269 lines
9.6 KiB
Rust
|
#![forbid(unsafe_code)]
|
||
|
|
|
||
|
|
use crate::app::{flatten_handle, flatten_handles, Web3ProxyApp};
|
||
|
|
use crate::config::TopConfig;
|
||
|
|
use crate::{frontend, prometheus};
|
||
|
|
use argh::FromArgs;
|
||
|
|
use futures::StreamExt;
|
||
|
|
use num::Zero;
|
||
|
|
use std::path::PathBuf;
|
||
|
|
use std::sync::atomic::AtomicU16;
|
||
|
|
use std::sync::Arc;
|
||
|
|
use std::time::Duration;
|
||
|
|
use std::{fs, thread};
|
||
|
|
use tokio::sync::broadcast;
|
||
|
|
use tracing::{error, info, trace, warn};
|
||
|
|
|
||
|
|
/// start the main proxy daemon
|
||
|
|
#[derive(FromArgs, PartialEq, Debug, Eq)]
|
||
|
|
#[argh(subcommand, name = "proxyd")]
|
||
|
|
pub struct ProxydSubCommand {
|
||
|
|
/// path to a toml of rpc servers
|
||
|
|
/// what port the proxy should listen on
|
||
|
|
#[argh(option, default = "8544")]
|
||
|
|
pub port: u16,
|
||
|
|
|
||
|
|
/// what port the proxy should expose prometheus stats on
|
||
|
|
#[argh(option, default = "8543")]
|
||
|
|
pub prometheus_port: u16,
|
||
|
|
}
|
||
|
|
|
||
|
|
impl ProxydSubCommand {
|
||
|
|
pub async fn main(
|
||
|
|
self,
|
||
|
|
top_config: TopConfig,
|
||
|
|
top_config_path: PathBuf,
|
||
|
|
num_workers: usize,
|
||
|
|
) -> anyhow::Result<()> {
|
||
|
|
let (shutdown_sender, _) = broadcast::channel(1);
|
||
|
|
// TODO: i think there is a small race. if config_path changes
|
||
|
|
|
||
|
|
let frontend_port = Arc::new(self.port.into());
|
||
|
|
let prometheus_port = Arc::new(self.prometheus_port.into());
|
||
|
|
|
||
|
|
Self::_main(
|
||
|
|
top_config,
|
||
|
|
Some(top_config_path),
|
||
|
|
frontend_port,
|
||
|
|
prometheus_port,
|
||
|
|
num_workers,
|
||
|
|
shutdown_sender,
|
||
|
|
)
|
||
|
|
.await
|
||
|
|
}
|
||
|
|
|
||
|
|
/// this shouldn't really be pub except it makes test fixtures easier
|
||
|
|
pub async fn _main(
|
||
|
|
top_config: TopConfig,
|
||
|
|
top_config_path: Option<PathBuf>,
|
||
|
|
frontend_port: Arc<AtomicU16>,
|
||
|
|
prometheus_port: Arc<AtomicU16>,
|
||
|
|
num_workers: usize,
|
||
|
|
frontend_shutdown_sender: broadcast::Sender<()>,
|
||
|
|
) -> anyhow::Result<()> {
|
||
|
|
// tokio has code for catching ctrl+c so we use that
|
||
|
|
// this shutdown sender is currently only used in tests, but we might make a /shutdown endpoint or something
|
||
|
|
// we do not need this receiver. new receivers are made by `shutdown_sender.subscribe()`
|
||
|
|
|
||
|
|
// TODO: should we use a watch or broadcast for these?
|
||
|
|
// Maybe this one ?
|
||
|
|
// let mut shutdown_receiver = shutdown_sender.subscribe();
|
||
|
|
let (app_shutdown_sender, _app_shutdown_receiver) = broadcast::channel(1);
|
||
|
|
|
||
|
|
let frontend_shutdown_receiver = frontend_shutdown_sender.subscribe();
|
||
|
|
let prometheus_shutdown_receiver = app_shutdown_sender.subscribe();
|
||
|
|
|
||
|
|
// TODO: should we use a watch or broadcast for these?
|
||
|
|
let (frontend_shutdown_complete_sender, mut frontend_shutdown_complete_receiver) =
|
||
|
|
broadcast::channel(1);
|
||
|
|
|
||
|
|
// start the main app
|
||
|
|
let mut spawned_app = Web3ProxyApp::spawn(
|
||
|
|
frontend_port,
|
||
|
|
prometheus_port,
|
||
|
|
top_config.clone(),
|
||
|
|
num_workers,
|
||
|
|
app_shutdown_sender.clone(),
|
||
|
|
)
|
||
|
|
.await?;
|
||
|
|
|
||
|
|
// start thread for watching config
|
||
|
|
if let Some(top_config_path) = top_config_path {
|
||
|
|
let config_sender = spawned_app.new_top_config;
|
||
|
|
{
|
||
|
|
let mut current_config = config_sender.borrow().clone();
|
||
|
|
|
||
|
|
thread::spawn(move || loop {
|
||
|
|
match fs::read_to_string(&top_config_path) {
|
||
|
|
Ok(new_top_config) => match toml::from_str::<TopConfig>(&new_top_config) {
|
||
|
|
Ok(new_top_config) => {
|
||
|
|
if new_top_config != current_config {
|
||
|
|
// TODO: print the differences
|
||
|
|
// TODO: first run seems to always see differences. why?
|
||
|
|
info!("config @ {:?} changed", top_config_path);
|
||
|
|
config_sender.send(new_top_config.clone()).unwrap();
|
||
|
|
current_config = new_top_config;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Err(err) => {
|
||
|
|
// TODO: panic?
|
||
|
|
error!("Unable to parse config! {:#?}", err);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
Err(err) => {
|
||
|
|
// TODO: panic?
|
||
|
|
error!("Unable to read config! {:#?}", err);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
thread::sleep(Duration::from_secs(10));
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// start the prometheus metrics port
|
||
|
|
let prometheus_handle = tokio::spawn(prometheus::serve(
|
||
|
|
spawned_app.app.clone(),
|
||
|
|
prometheus_shutdown_receiver,
|
||
|
|
));
|
||
|
|
|
||
|
|
info!("waiting for head block");
|
||
|
|
loop {
|
||
|
|
spawned_app.app.head_block_receiver().changed().await?;
|
||
|
|
|
||
|
|
if spawned_app
|
||
|
|
.app
|
||
|
|
.head_block_receiver()
|
||
|
|
.borrow_and_update()
|
||
|
|
.is_some()
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
} else {
|
||
|
|
info!("no head block yet!");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// start the frontend port
|
||
|
|
let frontend_handle = tokio::spawn(frontend::serve(
|
||
|
|
spawned_app.app,
|
||
|
|
frontend_shutdown_receiver,
|
||
|
|
frontend_shutdown_complete_sender,
|
||
|
|
));
|
||
|
|
|
||
|
|
let frontend_handle = flatten_handle(frontend_handle);
|
||
|
|
|
||
|
|
// if everything is working, these should all run forever
|
||
|
|
let mut exited_with_err = false;
|
||
|
|
let mut frontend_exited = false;
|
||
|
|
tokio::select! {
|
||
|
|
x = flatten_handles(spawned_app.app_handles) => {
|
||
|
|
match x {
|
||
|
|
Ok(_) => info!("app_handle exited"),
|
||
|
|
Err(e) => {
|
||
|
|
error!("app_handle exited: {:#?}", e);
|
||
|
|
exited_with_err = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
x = frontend_handle => {
|
||
|
|
frontend_exited = true;
|
||
|
|
match x {
|
||
|
|
Ok(_) => info!("frontend exited"),
|
||
|
|
Err(e) => {
|
||
|
|
error!("frontend exited: {:#?}", e);
|
||
|
|
exited_with_err = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
x = flatten_handle(prometheus_handle) => {
|
||
|
|
match x {
|
||
|
|
Ok(_) => info!("prometheus exited"),
|
||
|
|
Err(e) => {
|
||
|
|
error!("prometheus exited: {:#?}", e);
|
||
|
|
exited_with_err = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
x = tokio::signal::ctrl_c() => {
|
||
|
|
// TODO: unix terminate signal, too
|
||
|
|
match x {
|
||
|
|
Ok(_) => info!("quiting from ctrl-c"),
|
||
|
|
Err(e) => {
|
||
|
|
// TODO: i don't think this is possible
|
||
|
|
error!("error quiting from ctrl-c: {:#?}", e);
|
||
|
|
exited_with_err = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// TODO: This seems to have been removed on the main branch
|
||
|
|
// TODO: how can we properly watch background handles here? this returns None immediatly and the app exits. i think the bug is somewhere else though
|
||
|
|
x = spawned_app.background_handles.next() => {
|
||
|
|
match x {
|
||
|
|
Some(Ok(_)) => info!("quiting from background handles"),
|
||
|
|
Some(Err(e)) => {
|
||
|
|
error!("quiting from background handle error: {:#?}", e);
|
||
|
|
exited_with_err = true;
|
||
|
|
}
|
||
|
|
None => {
|
||
|
|
// TODO: is this an error?
|
||
|
|
warn!("background handles exited");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// TODO: This is also not there on the main branch
|
||
|
|
// if a future above completed, make sure the frontend knows to start turning off
|
||
|
|
if !frontend_exited {
|
||
|
|
if let Err(err) = frontend_shutdown_sender.send(()) {
|
||
|
|
// TODO: this is actually expected if the frontend is already shut down
|
||
|
|
warn!(?err, "shutdown sender");
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
// TODO: Also not there on main branch
|
||
|
|
// TODO: wait until the frontend completes
|
||
|
|
if let Err(err) = frontend_shutdown_complete_receiver.recv().await {
|
||
|
|
warn!(?err, "shutdown completition");
|
||
|
|
} else {
|
||
|
|
info!("frontend exited gracefully");
|
||
|
|
}
|
||
|
|
|
||
|
|
// now that the frontend is complete, tell all the other futures to finish
|
||
|
|
if let Err(err) = app_shutdown_sender.send(()) {
|
||
|
|
warn!(?err, "backend sender");
|
||
|
|
};
|
||
|
|
|
||
|
|
info!(
|
||
|
|
"waiting on {} important background tasks",
|
||
|
|
spawned_app.background_handles.len()
|
||
|
|
);
|
||
|
|
let mut background_errors = 0;
|
||
|
|
while let Some(x) = spawned_app.background_handles.next().await {
|
||
|
|
match x {
|
||
|
|
Err(e) => {
|
||
|
|
error!("{:?}", e);
|
||
|
|
background_errors += 1;
|
||
|
|
}
|
||
|
|
Ok(Err(e)) => {
|
||
|
|
error!("{:?}", e);
|
||
|
|
background_errors += 1;
|
||
|
|
}
|
||
|
|
Ok(Ok(_)) => {
|
||
|
|
// TODO: how can we know which handle exited?
|
||
|
|
trace!("a background handle exited");
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if background_errors.is_zero() && !exited_with_err {
|
||
|
|
info!("finished");
|
||
|
|
Ok(())
|
||
|
|
} else {
|
||
|
|
// TODO: collect all the errors here instead?
|
||
|
|
Err(anyhow::anyhow!("finished with errors!"))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|