83 lines
2.1 KiB
Rust
83 lines
2.1 KiB
Rust
use std::path::PathBuf;
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use std::collections::HashMap;
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use std::sync::{RwLock};
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use anyhow::{format_err, Error};
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use lazy_static::lazy_static;
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use proxmox::tools::fs::{create_path, CreateOptions};
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use crate::api2::types::{RRDMode, RRDTimeFrameResolution};
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use crate::tools::epoch_now_f64;
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use super::*;
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const PBS_RRD_BASEDIR: &str = "/var/lib/proxmox-backup/rrdb";
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lazy_static!{
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static ref RRD_CACHE: RwLock<HashMap<String, RRD>> = {
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RwLock::new(HashMap::new())
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};
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}
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/// Create rrdd stat dir with correct permission
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pub fn create_rrdb_dir() -> Result<(), Error> {
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let backup_user = crate::backup::backup_user()?;
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let opts = CreateOptions::new()
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.owner(backup_user.uid)
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.group(backup_user.gid);
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create_path(PBS_RRD_BASEDIR, None, Some(opts))
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.map_err(|err: Error| format_err!("unable to create rrdb stat dir - {}", err))?;
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Ok(())
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}
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pub fn update_value(rel_path: &str, value: f64, dst: DST, save: bool) -> Result<(), Error> {
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let mut path = PathBuf::from(PBS_RRD_BASEDIR);
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path.push(rel_path);
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std::fs::create_dir_all(path.parent().unwrap())?;
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let mut map = RRD_CACHE.write().unwrap();
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let now = epoch_now_f64()?;
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if let Some(rrd) = map.get_mut(rel_path) {
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rrd.update(now, value);
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if save { rrd.save(&path)?; }
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} else {
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let mut rrd = match RRD::load(&path) {
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Ok(rrd) => rrd,
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Err(err) => {
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if err.kind() != std::io::ErrorKind::NotFound {
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eprintln!("overwriting RRD file {:?}, because of load error: {}", path, err);
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}
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RRD::new(dst)
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},
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};
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rrd.update(now, value);
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if save { rrd.save(&path)?; }
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map.insert(rel_path.into(), rrd);
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}
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Ok(())
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}
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pub fn extract_cached_data(
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base: &str,
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name: &str,
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now: f64,
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timeframe: RRDTimeFrameResolution,
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mode: RRDMode,
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) -> Option<(u64, u64, Vec<Option<f64>>)> {
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let map = RRD_CACHE.read().unwrap();
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match map.get(&format!("{}/{}", base, name)) {
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Some(rrd) => Some(rrd.extract_data(now, timeframe, mode)),
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None => None,
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}
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}
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