tyler/proxmox-backup
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backup/datastore: save garbage collection status to disk

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and load it again when opening it

this way we can persist the status of the last garbage collect across
daemon reloads and reboots

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
This commit is contained in:
Dominik Csapak 2020-10-23 16:32:32 +02:00 committed by Thomas Lamprecht
parent a2285525be
commit b683fd589c
1 changed files with 32 additions and 2 deletions
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34
src/backup/datastore.rs
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@ -9,7 +9,7 @@ use std::fs::File;
use anyhow::{bail, format_err, Error};
use lazy_static::lazy_static;
use proxmox::tools::fs::{replace_file, CreateOptions, open_file_locked};
use proxmox::tools::fs::{replace_file, file_read_optional_string, CreateOptions, open_file_locked};
use super::backup_info::{BackupGroup, BackupDir};
use super::chunk_store::ChunkStore;
@ -71,7 +71,20 @@ impl DataStore {
fn open_with_path(store_name: &str, path: &Path, config: DataStoreConfig) -> Result<Self, Error> {
let chunk_store = ChunkStore::open(store_name, path)?;
let gc_status = GarbageCollectionStatus::default();
let mut gc_status_path = chunk_store.base_path();
gc_status_path.push(".gc-status");
let gc_status = if let Some(state) = file_read_optional_string(gc_status_path)? {
match serde_json::from_str(&state) {
Ok(state) => state,
Err(err) => {
eprintln!("error reading gc-status: {}", err);
GarbageCollectionStatus::default()
}
}
} else {
GarbageCollectionStatus::default()
};
Ok(Self {
chunk_store: Arc::new(chunk_store),
@ -572,6 +585,23 @@ impl DataStore {
crate::task_log!(worker, "Average chunk size: {}", HumanByte::from(avg_chunk));
}
if let Ok(serialized) = serde_json::to_string(&gc_status) {
let mut path = self.base_path();
path.push(".gc-status");
let backup_user = crate::backup::backup_user()?;
let mode = nix::sys::stat::Mode::from_bits_truncate(0o0644);
// set the correct owner/group/permissions while saving file
// owner(rw) = backup, group(r)= backup
let options = CreateOptions::new()
.perm(mode)
.owner(backup_user.uid)
.group(backup_user.gid);
// ignore errors
let _ = replace_file(path, serialized.as_bytes(), options);
}
*self.last_gc_status.lock().unwrap() = gc_status;
} else {