83 lines
2.0 KiB
Rust
83 lines
2.0 KiB
Rust
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use std::time::{SystemTime, UNIX_EPOCH};
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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 serde_json::Value;
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use proxmox::tools::fs::{create_path, CreateOptions};
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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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fn now() -> Result<u64, Error> {
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let epoch = SystemTime::now().duration_since(UNIX_EPOCH)?;
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Ok(epoch.as_secs())
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}
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pub fn update_value(rel_path: &str, value: f64) -> 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 = now()?;
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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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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(_) => RRD::new(),
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};
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rrd.update(now, value);
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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_data(
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rel_path: &str,
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timeframe: RRDTimeFrameResolution,
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mode: RRDMode,
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) -> Result<Value, Error> {
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let now = now()?;
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let map = RRD_CACHE.read().unwrap();
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if let Some(rrd) = map.get(rel_path) {
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Ok(rrd.extract_data(now, timeframe, mode))
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} else {
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Ok(RRD::new().extract_data(now, timeframe, mode))
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}
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}
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