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proxmox-rrd: cleanup error handling

This commit is contained in:
Dietmar Maurer 2021-10-07 08:01:12 +02:00
parent 3def6bfc64
commit 3cc23ca6cc
1 changed files with 33 additions and 29 deletions
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62
proxmox-rrd/src/rrd.rs
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@ -3,7 +3,7 @@
use std::io::Read; use std::io::Read;
use std::path::Path; use std::path::Path;
use anyhow::Error; use anyhow::{bail, Error};
use bitflags::bitflags; use bitflags::bitflags;
use proxmox::tools::{fs::replace_file, fs::CreateOptions}; use proxmox::tools::{fs::replace_file, fs::CreateOptions};
@ -127,19 +127,15 @@ impl RRA {
self.last_update = time; self.last_update = time;
} }
fn update(&mut self, time: f64, mut value: f64, log_time_in_past: &mut bool) { // Note: This may update the state even in case of errors (see counter overflow)
fn update(&mut self, time: f64, mut value: f64) -> Result<(), Error> {
if time <= self.last_update { if time <= self.last_update {
if *log_time_in_past { bail!("time in past ({} < {})", time, self.last_update);
log::warn!("rrdb update failed - time in past ({} < {})", time, self.last_update);
*log_time_in_past = false; // avoid logging this multiple times inside a RRD
}
return;
} }
if value.is_nan() { if value.is_nan() {
log::warn!("rrdb update failed - new value is NAN"); bail!("new value is NAN");
return;
} }
// derive counter value // derive counter value
@ -150,13 +146,13 @@ impl RRA {
let diff = if self.counter_value.is_nan() { let diff = if self.counter_value.is_nan() {
0.0 0.0
} else if is_counter && value < 0.0 { } else if is_counter && value < 0.0 {
log::warn!("rrdb update failed - got negative value for counter"); bail!("got negative value for counter");
return;
} else if is_counter && value < self.counter_value { } else if is_counter && value < self.counter_value {
// Note: We do not try automatic overflow corrections // Note: We do not try automatic overflow corrections, but
// we update counter_value anyways, so that we can compute the diff
// next time.
self.counter_value = value; self.counter_value = value;
log::warn!("rrdb update failed - conter overflow/reset detected"); bail!("conter overflow/reset detected");
return;
} else { } else {
value - self.counter_value value - self.counter_value
}; };
@ -166,6 +162,8 @@ impl RRA {
self.delete_old(time); self.delete_old(time);
self.compute_new_value(time, value); self.compute_new_value(time, value);
Ok(())
} }
} }
@ -343,26 +341,32 @@ impl RRD {
/// Note: This does not call [Self::save]. /// Note: This does not call [Self::save].
pub fn update(&mut self, time: f64, value: f64) { pub fn update(&mut self, time: f64, value: f64) {
if value.is_nan() { let mut log_error = true;
log::warn!("rrdb update failed - new value is NAN");
return;
}
let mut log_time_in_past = true; let mut update_rra = |rra: &mut RRA| {
if let Err(err) = rra.update(time, value) {
if log_error {
log::error!("rrd update failed: {}", err);
// we only log the first error, because it is very
// likely other calls produce the same error
log_error = false;
}
}
};
self.hour_avg.update(time, value, &mut log_time_in_past); update_rra(&mut self.hour_avg);
self.hour_max.update(time, value, &mut log_time_in_past); update_rra(&mut self.hour_max);
self.day_avg.update(time, value, &mut log_time_in_past); update_rra(&mut self.day_avg);
self.day_max.update(time, value, &mut log_time_in_past); update_rra(&mut self.day_max);
self.week_avg.update(time, value, &mut log_time_in_past); update_rra(&mut self.week_avg);
self.week_max.update(time, value, &mut log_time_in_past); update_rra(&mut self.week_max);
self.month_avg.update(time, value, &mut log_time_in_past); update_rra(&mut self.month_avg);
self.month_max.update(time, value, &mut log_time_in_past); update_rra(&mut self.month_max);
self.year_avg.update(time, value, &mut log_time_in_past); update_rra(&mut self.year_avg);
self.year_max.update(time, value, &mut log_time_in_past); update_rra(&mut self.year_max);
} }
} }