lighthouse/common/logging/src/lib.rs
Eitan Seri-Levi 612eaf2d41
Prevent rolling file appender panic (#5117)
* rolling file appender panic removal and max log file count

* max log file
2024-01-24 10:12:48 +11:00

307 lines
8.9 KiB
Rust

#[macro_use]
extern crate lazy_static;
use lighthouse_metrics::{
inc_counter, try_create_int_counter, IntCounter, Result as MetricsResult,
};
use slog::Logger;
use slog_term::Decorator;
use std::io::{Result, Write};
use std::path::PathBuf;
use std::time::{Duration, Instant};
use tracing_appender::non_blocking::NonBlocking;
use tracing_appender::rolling::{RollingFileAppender, Rotation};
use tracing_logging_layer::LoggingLayer;
use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
pub const MAX_MESSAGE_WIDTH: usize = 40;
pub mod async_record;
mod sse_logging_components;
mod tracing_logging_layer;
mod tracing_metrics_layer;
pub use sse_logging_components::SSELoggingComponents;
pub use tracing_metrics_layer::MetricsLayer;
/// The minimum interval between log messages indicating that a queue is full.
const LOG_DEBOUNCE_INTERVAL: Duration = Duration::from_secs(30);
lazy_static! {
pub static ref INFOS_TOTAL: MetricsResult<IntCounter> =
try_create_int_counter("info_total", "Count of infos logged");
pub static ref WARNS_TOTAL: MetricsResult<IntCounter> =
try_create_int_counter("warn_total", "Count of warns logged");
pub static ref ERRORS_TOTAL: MetricsResult<IntCounter> =
try_create_int_counter("error_total", "Count of errors logged");
pub static ref CRITS_TOTAL: MetricsResult<IntCounter> =
try_create_int_counter("crit_total", "Count of crits logged");
}
pub struct AlignedTermDecorator<D: Decorator> {
wrapped: D,
message_width: usize,
}
impl<D: Decorator> AlignedTermDecorator<D> {
pub fn new(decorator: D, message_width: usize) -> Self {
AlignedTermDecorator {
wrapped: decorator,
message_width,
}
}
}
impl<D: Decorator> Decorator for AlignedTermDecorator<D> {
fn with_record<F>(
&self,
record: &slog::Record,
_logger_values: &slog::OwnedKVList,
f: F,
) -> Result<()>
where
F: FnOnce(&mut dyn slog_term::RecordDecorator) -> std::io::Result<()>,
{
match record.level() {
slog::Level::Info => inc_counter(&INFOS_TOTAL),
slog::Level::Warning => inc_counter(&WARNS_TOTAL),
slog::Level::Error => inc_counter(&ERRORS_TOTAL),
slog::Level::Critical => inc_counter(&CRITS_TOTAL),
_ => (),
}
self.wrapped.with_record(record, _logger_values, |deco| {
f(&mut AlignedRecordDecorator::new(deco, self.message_width))
})
}
}
struct AlignedRecordDecorator<'a> {
wrapped: &'a mut dyn slog_term::RecordDecorator,
message_count: usize,
message_active: bool,
ignore_comma: bool,
message_width: usize,
}
impl<'a> AlignedRecordDecorator<'a> {
fn new(
decorator: &'a mut dyn slog_term::RecordDecorator,
message_width: usize,
) -> AlignedRecordDecorator<'a> {
AlignedRecordDecorator {
wrapped: decorator,
message_count: 0,
ignore_comma: false,
message_active: false,
message_width,
}
}
fn filtered_write(&mut self, buf: &[u8]) -> Result<usize> {
if self.ignore_comma {
//don't write comma
self.ignore_comma = false;
Ok(buf.len())
} else if self.message_active {
self.wrapped.write(buf).map(|n| {
self.message_count += n;
n
})
} else {
self.wrapped.write(buf)
}
}
}
impl<'a> Write for AlignedRecordDecorator<'a> {
fn write(&mut self, buf: &[u8]) -> Result<usize> {
if buf.iter().any(u8::is_ascii_control) {
let filtered = buf
.iter()
.cloned()
.map(|c| if !is_ascii_control(&c) { c } else { b'_' })
.collect::<Vec<u8>>();
self.filtered_write(&filtered)
} else {
self.filtered_write(buf)
}
}
fn flush(&mut self) -> Result<()> {
self.wrapped.flush()
}
}
impl<'a> slog_term::RecordDecorator for AlignedRecordDecorator<'a> {
fn reset(&mut self) -> Result<()> {
self.message_active = false;
self.message_count = 0;
self.ignore_comma = false;
self.wrapped.reset()
}
fn start_whitespace(&mut self) -> Result<()> {
self.wrapped.start_whitespace()
}
fn start_msg(&mut self) -> Result<()> {
self.message_active = true;
self.ignore_comma = false;
self.wrapped.start_msg()
}
fn start_timestamp(&mut self) -> Result<()> {
self.wrapped.start_timestamp()
}
fn start_level(&mut self) -> Result<()> {
self.wrapped.start_level()
}
fn start_comma(&mut self) -> Result<()> {
if self.message_active && self.message_count + 1 < self.message_width {
self.ignore_comma = true;
}
self.wrapped.start_comma()
}
fn start_key(&mut self) -> Result<()> {
if self.message_active && self.message_count + 1 < self.message_width {
write!(
self,
"{}",
" ".repeat(self.message_width - self.message_count)
)?;
self.message_active = false;
self.message_count = 0;
self.ignore_comma = false;
}
self.wrapped.start_key()
}
fn start_value(&mut self) -> Result<()> {
self.wrapped.start_value()
}
fn start_separator(&mut self) -> Result<()> {
self.wrapped.start_separator()
}
}
/// Function to filter out ascii control codes.
///
/// This helps to keep log formatting consistent.
/// Whitespace and padding control codes are excluded.
fn is_ascii_control(character: &u8) -> bool {
matches!(
character,
b'\x00'..=b'\x08' |
b'\x0b'..=b'\x0c' |
b'\x0e'..=b'\x1f' |
b'\x7f' |
b'\x81'..=b'\x9f'
)
}
/// Provides de-bounce functionality for logging.
#[derive(Default)]
pub struct TimeLatch(Option<Instant>);
impl TimeLatch {
/// Only returns true once every `LOG_DEBOUNCE_INTERVAL`.
pub fn elapsed(&mut self) -> bool {
let now = Instant::now();
let is_elapsed = self.0.map_or(false, |elapse_time| now > elapse_time);
if is_elapsed || self.0.is_none() {
self.0 = Some(now + LOG_DEBOUNCE_INTERVAL);
}
is_elapsed
}
}
pub fn create_tracing_layer(base_tracing_log_path: PathBuf, turn_on_terminal_logs: bool) {
let filter_layer = match tracing_subscriber::EnvFilter::try_from_default_env()
.or_else(|_| tracing_subscriber::EnvFilter::try_new("warn"))
{
Ok(filter) => filter,
Err(e) => {
eprintln!("Failed to initialize dependency logging {e}");
return;
}
};
let Ok(libp2p_writer) = RollingFileAppender::builder()
.rotation(Rotation::DAILY)
.max_log_files(2)
.filename_prefix("libp2p")
.filename_suffix("log")
.build(base_tracing_log_path.clone())
else {
eprintln!("Failed to initialize libp2p rolling file appender");
return;
};
let Ok(discv5_writer) = RollingFileAppender::builder()
.rotation(Rotation::DAILY)
.max_log_files(2)
.filename_prefix("discv5")
.filename_suffix("log")
.build(base_tracing_log_path.clone())
else {
eprintln!("Failed to initialize discv5 rolling file appender");
return;
};
let (libp2p_non_blocking_writer, libp2p_guard) = NonBlocking::new(libp2p_writer);
let (discv5_non_blocking_writer, discv5_guard) = NonBlocking::new(discv5_writer);
let custom_layer = LoggingLayer {
libp2p_non_blocking_writer,
libp2p_guard,
discv5_non_blocking_writer,
discv5_guard,
};
if let Err(e) = tracing_subscriber::fmt()
.with_env_filter(filter_layer)
.with_writer(move || {
tracing_subscriber::fmt::writer::OptionalWriter::<std::io::Stdout>::from(
turn_on_terminal_logs.then(std::io::stdout),
)
})
.finish()
.with(MetricsLayer)
.with(custom_layer)
.try_init()
{
eprintln!("Failed to initialize dependency logging {e}");
}
}
/// Return a logger suitable for test usage.
///
/// By default no logs will be printed, but they can be enabled via
/// the `test_logger` feature. This feature can be enabled for any
/// dependent crate by passing `--features logging/test_logger`, e.g.
/// ```bash
/// cargo test -p beacon_chain --features logging/test_logger
/// ```
pub fn test_logger() -> Logger {
use sloggers::Build;
if cfg!(feature = "test_logger") {
sloggers::terminal::TerminalLoggerBuilder::new()
.level(sloggers::types::Severity::Debug)
.build()
.expect("Should build test_logger")
} else {
sloggers::null::NullLoggerBuilder
.build()
.expect("Should build null_logger")
}
}