src/bin/proxmox-backup-proxy.rs

   1 use std::sync::Arc;
   2 use std::ffi::OsString;
   3 use std::path::Path;
   4
   5 use anyhow::{bail, format_err, Error};
   6 use futures::*;
   7 use hyper;
   8 use openssl::ssl::{SslMethod, SslAcceptor, SslFiletype};
   9
  10 use proxmox::try_block;
  11 use proxmox::api::RpcEnvironmentType;
  12 use proxmox::sys::linux::procfs::mountinfo::{Device, MountInfo};
  13
  14 use proxmox_backup::configdir;
  15 use proxmox_backup::buildcfg;
  16 use proxmox_backup::server;
  17 use proxmox_backup::tools::daemon;
  18 use proxmox_backup::server::{ApiConfig, rest::*};
  19 use proxmox_backup::auth_helpers::*;
  20 use proxmox_backup::tools::disks::{ DiskManage, zfs::zfs_pool_stats };
  21
  22 fn main() {
  23     if let Err(err) = proxmox_backup::tools::runtime::main(run()) {
  24         eprintln!("Error: {}", err);
  25         std::process::exit(-1);
  26     }
  27 }
  28
  29 async fn run() -> Result<(), Error> {
  30     if let Err(err) = syslog::init(
  31         syslog::Facility::LOG_DAEMON,
  32         log::LevelFilter::Info,
  33         Some("proxmox-backup-proxy")) {
  34         bail!("unable to inititialize syslog - {}", err);
  35     }
  36
  37     let _ = public_auth_key(); // load with lazy_static
  38     let _ = csrf_secret(); // load with lazy_static
  39
  40     let mut config = ApiConfig::new(
  41         buildcfg::JS_DIR, &proxmox_backup::api2::ROUTER, RpcEnvironmentType::PUBLIC)?;
  42
  43     // add default dirs which includes jquery and bootstrap
  44     // my $base = '/usr/share/libpve-http-server-perl';
  45     // add_dirs($self->{dirs}, '/css/' => "$base/css/");
  46     // add_dirs($self->{dirs}, '/js/' => "$base/js/");
  47     // add_dirs($self->{dirs}, '/fonts/' => "$base/fonts/");
  48     config.add_alias("novnc", "/usr/share/novnc-pve");
  49     config.add_alias("extjs", "/usr/share/javascript/extjs");
  50     config.add_alias("fontawesome", "/usr/share/fonts-font-awesome");
  51     config.add_alias("xtermjs", "/usr/share/pve-xtermjs");
  52     config.add_alias("widgettoolkit", "/usr/share/javascript/proxmox-widget-toolkit");
  53     config.add_alias("css", "/usr/share/javascript/proxmox-backup/css");
  54     config.add_alias("docs", "/usr/share/doc/proxmox-backup/html");
  55
  56     let rest_server = RestServer::new(config);
  57
  58     //openssl req -x509 -newkey rsa:4096 -keyout /etc/proxmox-backup/proxy.key -out /etc/proxmox-backup/proxy.pem -nodes
  59     let key_path = configdir!("/proxy.key");
  60     let cert_path = configdir!("/proxy.pem");
  61
  62     let mut acceptor = SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();
  63     acceptor.set_private_key_file(key_path, SslFiletype::PEM)
  64         .map_err(|err| format_err!("unable to read proxy key {} - {}", key_path, err))?;
  65     acceptor.set_certificate_chain_file(cert_path)
  66         .map_err(|err| format_err!("unable to read proxy cert {} - {}", cert_path, err))?;
  67     acceptor.check_private_key().unwrap();
  68
  69     let acceptor = Arc::new(acceptor.build());
  70
  71     let server = daemon::create_daemon(
  72         ([0,0,0,0,0,0,0,0], 8007).into(),
  73         |listener, ready| {
  74             let connections = proxmox_backup::tools::async_io::StaticIncoming::from(listener)
  75                 .map_err(Error::from)
  76                 .try_filter_map(move |(sock, _addr)| {
  77                     let acceptor = Arc::clone(&acceptor);
  78                     async move {
  79                         sock.set_nodelay(true).unwrap();
  80                         sock.set_send_buffer_size(1024*1024).unwrap();
  81                         sock.set_recv_buffer_size(1024*1024).unwrap();
  82                         Ok(tokio_openssl::accept(&acceptor, sock)
  83                             .await
  84                             .ok() // handshake errors aren't be fatal, so return None to filter
  85                         )
  86                     }
  87                 });
  88             let connections = proxmox_backup::tools::async_io::HyperAccept(connections);
  89
  90             Ok(ready
  91                 .and_then(|_| hyper::Server::builder(connections)
  92                     .serve(rest_server)
  93                     .with_graceful_shutdown(server::shutdown_future())
  94                     .map_err(Error::from)
  95                 )
  96                 .map_err(|err| eprintln!("server error: {}", err))
  97                 .map(|_| ())
  98             )
  99         },
 100     );
 101
 102     daemon::systemd_notify(daemon::SystemdNotify::Ready)?;
 103
 104     let init_result: Result<(), Error> = try_block!({
 105         server::create_task_control_socket()?;
 106         server::server_state_init()?;
 107         Ok(())
 108     });
 109
 110     if let Err(err) = init_result {
 111         bail!("unable to start daemon - {}", err);
 112     }
 113
 114     start_task_scheduler();
 115     start_stat_generator();
 116
 117     server.await?;
 118     log::info!("server shutting down, waiting for active workers to complete");
 119     proxmox_backup::server::last_worker_future().await?;
 120     log::info!("done - exit server");
 121
 122     Ok(())
 123 }
 124
 125 fn start_stat_generator() {
 126     let abort_future = server::shutdown_future();
 127     let future = Box::pin(run_stat_generator());
 128     let task = futures::future::select(future, abort_future);
 129     tokio::spawn(task.map(|_| ()));
 130 }
 131
 132 fn start_task_scheduler() {
 133     let abort_future = server::shutdown_future();
 134     let future = Box::pin(run_task_scheduler());
 135     let task = futures::future::select(future, abort_future);
 136     tokio::spawn(task.map(|_| ()));
 137 }
 138
 139 use std::time:: {Instant, Duration, SystemTime, UNIX_EPOCH};
 140
 141 fn next_minute() -> Result<Instant, Error> {
 142     let epoch_now = SystemTime::now().duration_since(UNIX_EPOCH)?;
 143     let epoch_next = Duration::from_secs((epoch_now.as_secs()/60 + 1)*60);
 144     Ok(Instant::now() + epoch_next - epoch_now)
 145 }
 146
 147 async fn run_task_scheduler() {
 148
 149     let mut count: usize = 0;
 150
 151     loop {
 152         count += 1;
 153
 154         let delay_target = match next_minute() {  // try to run very minute
 155             Ok(d) => d,
 156             Err(err) => {
 157                 eprintln!("task scheduler: compute next minute failed - {}", err);
 158                 tokio::time::delay_until(tokio::time::Instant::from_std(Instant::now() + Duration::from_secs(60))).await;
 159                 continue;
 160             }
 161         };
 162
 163         if count > 2 { // wait 1..2 minutes before starting
 164             match schedule_tasks().catch_unwind().await {
 165                 Err(panic) => {
 166                     match panic.downcast::<&str>() {
 167                         Ok(msg) => {
 168                             eprintln!("task scheduler panic: {}", msg);
 169                         }
 170                         Err(_) => {
 171                             eprintln!("task scheduler panic - unknown type");
 172                         }
 173                     }
 174                 }
 175                 Ok(Err(err)) => {
 176                     eprintln!("task scheduler failed - {:?}", err);
 177                 }
 178                 Ok(Ok(_)) => {}
 179             }
 180         }
 181
 182         tokio::time::delay_until(tokio::time::Instant::from_std(delay_target)).await;
 183     }
 184 }
 185
 186 async fn schedule_tasks() -> Result<(), Error> {
 187
 188     schedule_datastore_garbage_collection().await;
 189     schedule_datastore_prune().await;
 190     schedule_datastore_sync_jobs().await;
 191
 192     Ok(())
 193 }
 194
 195 fn lookup_last_worker(worker_type: &str, worker_id: &str) -> Result<Option<server::UPID>, Error> {
 196
 197     let list = proxmox_backup::server::read_task_list()?;
 198
 199     let mut last: Option<&server::UPID> = None;
 200
 201     for entry in list.iter() {
 202         if entry.upid.worker_type == worker_type {
 203             if let Some(ref id) = entry.upid.worker_id {
 204                 if id == worker_id {
 205                     match last {
 206                         Some(ref upid) => {
 207                             if upid.starttime < entry.upid.starttime {
 208                                 last = Some(&entry.upid)
 209                             }
 210                         }
 211                         None => {
 212                             last = Some(&entry.upid)
 213                         }
 214                     }
 215                 }
 216             }
 217         }
 218     }
 219
 220     Ok(last.cloned())
 221 }
 222
 223
 224 async fn schedule_datastore_garbage_collection() {
 225
 226     use proxmox_backup::backup::DataStore;
 227     use proxmox_backup::server::{UPID, WorkerTask};
 228     use proxmox_backup::config::datastore::{self, DataStoreConfig};
 229     use proxmox_backup::tools::systemd::time::{
 230         parse_calendar_event, compute_next_event};
 231
 232     let config = match datastore::config() {
 233         Err(err) => {
 234             eprintln!("unable to read datastore config - {}", err);
 235             return;
 236         }
 237         Ok((config, _digest)) => config,
 238     };
 239
 240     for (store, (_, store_config)) in config.sections {
 241         let datastore = match DataStore::lookup_datastore(&store) {
 242             Ok(datastore) => datastore,
 243             Err(err) => {
 244                 eprintln!("lookup_datastore failed - {}", err);
 245                 continue;
 246             }
 247         };
 248
 249         let store_config: DataStoreConfig = match serde_json::from_value(store_config) {
 250             Ok(c) => c,
 251             Err(err) => {
 252                 eprintln!("datastore config from_value failed - {}", err);
 253                 continue;
 254             }
 255         };
 256
 257         let event_str = match store_config.gc_schedule {
 258             Some(event_str) => event_str,
 259             None => continue,
 260         };
 261
 262         let event = match parse_calendar_event(&event_str) {
 263             Ok(event) => event,
 264             Err(err) => {
 265                 eprintln!("unable to parse schedule '{}' - {}", event_str, err);
 266                 continue;
 267             }
 268         };
 269
 270         if datastore.garbage_collection_running() { continue; }
 271
 272         let worker_type = "garbage_collection";
 273
 274         let stat = datastore.last_gc_status();
 275         let last = if let Some(upid_str) = stat.upid {
 276             match upid_str.parse::<UPID>() {
 277                 Ok(upid) => upid.starttime,
 278                 Err(err) => {
 279                     eprintln!("unable to parse upid '{}' - {}", upid_str, err);
 280                     continue;
 281                 }
 282             }
 283         } else {
 284             match lookup_last_worker(worker_type, &store) {
 285                 Ok(Some(upid)) => upid.starttime,
 286                 Ok(None) => 0,
 287                 Err(err) => {
 288                     eprintln!("lookup_last_job_start failed: {}", err);
 289                     continue;
 290                 }
 291             }
 292         };
 293
 294         let next = match compute_next_event(&event, last, false) {
 295             Ok(next) => next,
 296             Err(err) => {
 297                 eprintln!("compute_next_event for '{}' failed - {}", event_str, err);
 298                 continue;
 299             }
 300         };
 301         let now = match SystemTime::now().duration_since(UNIX_EPOCH) {
 302             Ok(epoch_now) => epoch_now.as_secs() as i64,
 303             Err(err) => {
 304                 eprintln!("query system time failed - {}", err);
 305                 continue;
 306             }
 307         };
 308         if next > now  { continue; }
 309
 310         let store2 = store.clone();
 311
 312         if let Err(err) = WorkerTask::new_thread(
 313             worker_type,
 314             Some(store.clone()),
 315             "backup@pam",
 316             false,
 317             move |worker| {
 318                 worker.log(format!("starting garbage collection on store {}", store));
 319                 worker.log(format!("task triggered by schedule '{}'", event_str));
 320                 datastore.garbage_collection(&worker)
 321             }
 322         ) {
 323             eprintln!("unable to start garbage collection on store {} - {}", store2, err);
 324         }
 325     }
 326 }
 327
 328 async fn schedule_datastore_prune() {
 329
 330     use proxmox_backup::backup::{
 331         PruneOptions, DataStore, BackupGroup, BackupDir, compute_prune_info};
 332     use proxmox_backup::server::{WorkerTask};
 333     use proxmox_backup::config::datastore::{self, DataStoreConfig};
 334     use proxmox_backup::tools::systemd::time::{
 335         parse_calendar_event, compute_next_event};
 336
 337     let config = match datastore::config() {
 338         Err(err) => {
 339             eprintln!("unable to read datastore config - {}", err);
 340             return;
 341         }
 342         Ok((config, _digest)) => config,
 343     };
 344
 345     for (store, (_, store_config)) in config.sections {
 346         let datastore = match DataStore::lookup_datastore(&store) {
 347             Ok(datastore) => datastore,
 348             Err(err) => {
 349                 eprintln!("lookup_datastore '{}' failed - {}", store, err);
 350                 continue;
 351             }
 352         };
 353
 354         let store_config: DataStoreConfig = match serde_json::from_value(store_config) {
 355             Ok(c) => c,
 356             Err(err) => {
 357                 eprintln!("datastore '{}' config from_value failed - {}", store, err);
 358                 continue;
 359             }
 360         };
 361
 362         let event_str = match store_config.prune_schedule {
 363             Some(event_str) => event_str,
 364             None => continue,
 365         };
 366
 367         let prune_options = PruneOptions {
 368             keep_last: store_config.keep_last,
 369             keep_hourly: store_config.keep_hourly,
 370             keep_daily:  store_config.keep_daily,
 371             keep_weekly: store_config.keep_weekly,
 372             keep_monthly: store_config.keep_monthly,
 373             keep_yearly: store_config.keep_yearly,
 374         };
 375
 376         if !prune_options.keeps_something() { // no prune settings - keep all
 377             continue;
 378         }
 379
 380         let event = match parse_calendar_event(&event_str) {
 381             Ok(event) => event,
 382             Err(err) => {
 383                 eprintln!("unable to parse schedule '{}' - {}", event_str, err);
 384                 continue;
 385             }
 386         };
 387
 388         //fixme: if last_prune_job_stzill_running { continue; }
 389
 390         let worker_type = "prune";
 391
 392         let last = match lookup_last_worker(worker_type, &store) {
 393             Ok(Some(upid)) => upid.starttime,
 394             Ok(None) => 0,
 395             Err(err) => {
 396                 eprintln!("lookup_last_job_start failed: {}", err);
 397                 continue;
 398             }
 399         };
 400
 401         let next = match compute_next_event(&event, last, false) {
 402             Ok(next) => next,
 403             Err(err) => {
 404                 eprintln!("compute_next_event for '{}' failed - {}", event_str, err);
 405                 continue;
 406             }
 407         };
 408
 409         let now = match SystemTime::now().duration_since(UNIX_EPOCH) {
 410             Ok(epoch_now) => epoch_now.as_secs() as i64,
 411             Err(err) => {
 412                 eprintln!("query system time failed - {}", err);
 413                 continue;
 414             }
 415         };
 416         if next > now  { continue; }
 417
 418         let store2 = store.clone();
 419
 420         if let Err(err) = WorkerTask::new_thread(
 421             worker_type,
 422             Some(store.clone()),
 423             "backup@pam",
 424             false,
 425             move |worker| {
 426                 worker.log(format!("Starting datastore prune on store \"{}\"", store));
 427                 worker.log(format!("task triggered by schedule '{}'", event_str));
 428                 worker.log(format!("retention options: {}", prune_options.cli_options_string()));
 429
 430                 let base_path = datastore.base_path();
 431
 432                 let groups = BackupGroup::list_groups(&base_path)?;
 433                 for group in groups {
 434                     let list = group.list_backups(&base_path)?;
 435                     let mut prune_info = compute_prune_info(list, &prune_options)?;
 436                     prune_info.reverse(); // delete older snapshots first
 437
 438                     worker.log(format!("Starting prune on store \"{}\" group \"{}/{}\"",
 439                                        store, group.backup_type(), group.backup_id()));
 440
 441                     for (info, keep) in prune_info {
 442                         worker.log(format!(
 443                             "{} {}/{}/{}",
 444                             if keep { "keep" } else { "remove" },
 445                             group.backup_type(), group.backup_id(),
 446                             BackupDir::backup_time_to_string(info.backup_dir.backup_time())));
 447
 448                         if !keep {
 449                             datastore.remove_backup_dir(&info.backup_dir)?;
 450                         }
 451                     }
 452                 }
 453
 454                 Ok(())
 455             }
 456         ) {
 457             eprintln!("unable to start datastore prune on store {} - {}", store2, err);
 458         }
 459     }
 460 }
 461
 462 async fn schedule_datastore_sync_jobs() {
 463
 464     use proxmox_backup::{
 465         backup::DataStore,
 466         client::{ HttpClient, HttpClientOptions, BackupRepository, pull::pull_store },
 467         server::{ WorkerTask },
 468         config::{ sync::{self, SyncJobConfig}, remote::{self, Remote} },
 469         tools::systemd::time::{ parse_calendar_event, compute_next_event },
 470     };
 471
 472     let config = match sync::config() {
 473         Err(err) => {
 474             eprintln!("unable to read sync job config - {}", err);
 475             return;
 476         }
 477         Ok((config, _digest)) => config,
 478     };
 479
 480     let remote_config = match remote::config() {
 481         Err(err) => {
 482             eprintln!("unable to read remote config - {}", err);
 483             return;
 484         }
 485         Ok((config, _digest)) => config,
 486     };
 487
 488     for (job_id, (_, job_config)) in config.sections {
 489         let job_config: SyncJobConfig = match serde_json::from_value(job_config) {
 490             Ok(c) => c,
 491             Err(err) => {
 492                 eprintln!("sync job config from_value failed - {}", err);
 493                 continue;
 494             }
 495         };
 496
 497         let event_str = match job_config.schedule {
 498             Some(ref event_str) => event_str.clone(),
 499             None => continue,
 500         };
 501
 502         let event = match parse_calendar_event(&event_str) {
 503             Ok(event) => event,
 504             Err(err) => {
 505                 eprintln!("unable to parse schedule '{}' - {}", event_str, err);
 506                 continue;
 507             }
 508         };
 509
 510         //fixme: if last_sync_job_still_running { continue; }
 511
 512         let worker_type = "sync";
 513
 514         let last = match lookup_last_worker(worker_type, &job_id) {
 515             Ok(Some(upid)) => upid.starttime,
 516             Ok(None) => 0,
 517             Err(err) => {
 518                 eprintln!("lookup_last_job_start failed: {}", err);
 519                 continue;
 520             }
 521         };
 522
 523         let next = match compute_next_event(&event, last, false) {
 524             Ok(next) => next,
 525             Err(err) => {
 526                 eprintln!("compute_next_event for '{}' failed - {}", event_str, err);
 527                 continue;
 528             }
 529         };
 530
 531         let now = match SystemTime::now().duration_since(UNIX_EPOCH) {
 532             Ok(epoch_now) => epoch_now.as_secs() as i64,
 533             Err(err) => {
 534                 eprintln!("query system time failed - {}", err);
 535                 continue;
 536             }
 537         };
 538         if next > now  { continue; }
 539
 540
 541         let job_id2 = job_id.clone();
 542
 543         let tgt_store = match DataStore::lookup_datastore(&job_config.store) {
 544             Ok(datastore) => datastore,
 545             Err(err) => {
 546                 eprintln!("lookup_datastore '{}' failed - {}", job_config.store, err);
 547                 continue;
 548             }
 549         };
 550
 551         let remote: Remote = match remote_config.lookup("remote", &job_config.remote) {
 552             Ok(remote) => remote,
 553             Err(err) => {
 554                 eprintln!("remote_config lookup failed: {}", err);
 555                 continue;
 556             }
 557         };
 558
 559         let username = String::from("backup@pam");
 560
 561         let delete = job_config.remove_vanished.unwrap_or(true);
 562
 563         if let Err(err) = WorkerTask::spawn(
 564             worker_type,
 565             Some(job_id.clone()),
 566             &username.clone(),
 567             false,
 568             move |worker| async move {
 569                 worker.log(format!("Starting datastore sync job '{}'", job_id));
 570                 worker.log(format!("task triggered by schedule '{}'", event_str));
 571                 worker.log(format!("Sync datastore '{}' from '{}/{}'",
 572                                    job_config.store, job_config.remote, job_config.remote_store));
 573
 574                 let options = HttpClientOptions::new()
 575                     .password(Some(remote.password.clone()))
 576                     .fingerprint(remote.fingerprint.clone());
 577
 578                 let client = HttpClient::new(&remote.host, &remote.userid, options)?;
 579                 let _auth_info = client.login() // make sure we can auth
 580                     .await
 581                     .map_err(|err| format_err!("remote connection to '{}' failed - {}", remote.host, err))?;
 582
 583                 let src_repo = BackupRepository::new(Some(remote.userid), Some(remote.host), job_config.remote_store);
 584
 585                 pull_store(&worker, &client, &src_repo, tgt_store, delete, username).await?;
 586
 587                 Ok(())
 588             }
 589         ) {
 590             eprintln!("unable to start datastore sync job {} - {}", job_id2, err);
 591         }
 592     }
 593 }
 594
 595 async fn run_stat_generator() {
 596
 597     loop {
 598         let delay_target = Instant::now() +  Duration::from_secs(10);
 599
 600         generate_host_stats().await;
 601
 602         tokio::time::delay_until(tokio::time::Instant::from_std(delay_target)).await;
 603     }
 604
 605 }
 606
 607 fn rrd_update_gauge(name: &str, value: f64) {
 608     use proxmox_backup::rrd;
 609     if let Err(err) = rrd::update_value(name, value, rrd::DST::Gauge) {
 610         eprintln!("rrd::update_value '{}' failed - {}", name, err);
 611     }
 612 }
 613
 614 fn rrd_update_derive(name: &str, value: f64) {
 615     use proxmox_backup::rrd;
 616     if let Err(err) = rrd::update_value(name, value, rrd::DST::Derive) {
 617         eprintln!("rrd::update_value '{}' failed - {}", name, err);
 618     }
 619 }
 620
 621 async fn generate_host_stats() {
 622     use proxmox::sys::linux::procfs::{
 623         read_meminfo, read_proc_stat, read_proc_net_dev, read_loadavg};
 624     use proxmox_backup::config::datastore;
 625
 626
 627     proxmox_backup::tools::runtime::block_in_place(move || {
 628
 629         match read_proc_stat() {
 630             Ok(stat) => {
 631                 rrd_update_gauge("host/cpu", stat.cpu);
 632                 rrd_update_gauge("host/iowait", stat.iowait_percent);
 633             }
 634             Err(err) => {
 635                 eprintln!("read_proc_stat failed - {}", err);
 636             }
 637         }
 638
 639         match read_meminfo() {
 640             Ok(meminfo) => {
 641                 rrd_update_gauge("host/memtotal", meminfo.memtotal as f64);
 642                 rrd_update_gauge("host/memused", meminfo.memused as f64);
 643                 rrd_update_gauge("host/swaptotal", meminfo.swaptotal as f64);
 644                 rrd_update_gauge("host/swapused", meminfo.swapused as f64);
 645             }
 646             Err(err) => {
 647                 eprintln!("read_meminfo failed - {}", err);
 648             }
 649         }
 650
 651         match read_proc_net_dev() {
 652             Ok(netdev) => {
 653                 use proxmox_backup::config::network::is_physical_nic;
 654                 let mut netin = 0;
 655                 let mut netout = 0;
 656                 for item in netdev {
 657                     if !is_physical_nic(&item.device) { continue; }
 658                     netin += item.receive;
 659                     netout += item.send;
 660                 }
 661                 rrd_update_derive("host/netin", netin as f64);
 662                 rrd_update_derive("host/netout", netout as f64);
 663             }
 664             Err(err) => {
 665                 eprintln!("read_prox_net_dev failed - {}", err);
 666             }
 667         }
 668
 669         match read_loadavg() {
 670             Ok(loadavg) => {
 671                 rrd_update_gauge("host/loadavg", loadavg.0 as f64);
 672             }
 673             Err(err) => {
 674                 eprintln!("read_loadavg failed - {}", err);
 675             }
 676         }
 677
 678         let disk_manager = DiskManage::new();
 679
 680         gather_disk_stats(disk_manager.clone(), Path::new("/"), "host");
 681
 682         match datastore::config() {
 683             Ok((config, _)) => {
 684                 let datastore_list: Vec<datastore::DataStoreConfig> =
 685                     config.convert_to_typed_array("datastore").unwrap_or(Vec::new());
 686
 687                 for config in datastore_list {
 688
 689                     let rrd_prefix = format!("datastore/{}", config.name);
 690                     let path = std::path::Path::new(&config.path);
 691                     gather_disk_stats(disk_manager.clone(), path, &rrd_prefix);
 692                 }
 693             }
 694             Err(err) => {
 695                 eprintln!("read datastore config failed - {}", err);
 696             }
 697         }
 698
 699     });
 700 }
 701
 702
 703 fn gather_disk_stats(disk_manager: Arc<DiskManage>, path: &Path, rrd_prefix: &str) {
 704
 705     match disk_usage(path) {
 706         Ok((total, used, _avail)) => {
 707             let rrd_key = format!("{}/total", rrd_prefix);
 708             rrd_update_gauge(&rrd_key, total as f64);
 709             let rrd_key = format!("{}/used", rrd_prefix);
 710             rrd_update_gauge(&rrd_key, used as f64);
 711         }
 712         Err(err) => {
 713             eprintln!("read disk_usage on {:?} failed - {}", path, err);
 714         }
 715     }
 716
 717     match disk_manager.mount_info() {
 718         Ok(mountinfo) => {
 719             if let Some((fs_type, device, source)) = find_mounted_device(mountinfo, path) {
 720                 let mut device_stat = None;
 721                 match fs_type.as_str() {
 722                     "zfs" => {
 723                         if let Some(pool) = source {
 724                             match zfs_pool_stats(&pool) {
 725                                 Ok(stat) => device_stat = stat,
 726                                 Err(err) => eprintln!("zfs_pool_stats({:?}) failed - {}", pool, err),
 727                             }
 728                         }
 729                     }
 730                     _ => {
 731                         if let Ok(disk) = disk_manager.clone().disk_by_dev_num(device.into_dev_t()) {
 732                             match disk.read_stat() {
 733                                 Ok(stat) => device_stat = stat,
 734                                 Err(err) => eprintln!("disk.read_stat {:?} failed - {}", path, err),
 735                             }
 736                         }
 737                     }
 738                 }
 739                 if let Some(stat) = device_stat {
 740                     let rrd_key = format!("{}/read_ios", rrd_prefix);
 741                     rrd_update_derive(&rrd_key, stat.read_ios as f64);
 742                     let rrd_key = format!("{}/read_bytes", rrd_prefix);
 743                     rrd_update_derive(&rrd_key, (stat.read_sectors*512) as f64);
 744
 745                     let rrd_key = format!("{}/write_ios", rrd_prefix);
 746                     rrd_update_derive(&rrd_key, stat.write_ios as f64);
 747                     let rrd_key = format!("{}/write_bytes", rrd_prefix);
 748                     rrd_update_derive(&rrd_key, (stat.write_sectors*512) as f64);
 749
 750                     let rrd_key = format!("{}/io_ticks", rrd_prefix);
 751                     rrd_update_derive(&rrd_key, (stat.io_ticks as f64)/1000.0);
 752                 }
 753             }
 754         }
 755         Err(err) => {
 756             eprintln!("disk_manager mount_info() failed - {}", err);
 757         }
 758     }
 759 }
 760
 761 // Returns (total, used, avail)
 762 fn disk_usage(path: &std::path::Path) -> Result<(u64, u64, u64), Error> {
 763
 764     let mut stat: libc::statfs64 = unsafe { std::mem::zeroed() };
 765
 766     use nix::NixPath;
 767
 768     let res = path.with_nix_path(|cstr| unsafe { libc::statfs64(cstr.as_ptr(), &mut stat) })?;
 769     nix::errno::Errno::result(res)?;
 770
 771     let bsize = stat.f_bsize as u64;
 772
 773     Ok((stat.f_blocks*bsize, (stat.f_blocks-stat.f_bfree)*bsize, stat.f_bavail*bsize))
 774 }
 775
 776 // Returns (fs_type, device, mount_source)
 777 pub fn find_mounted_device(
 778     mountinfo: &MountInfo,
 779     path: &std::path::Path,
 780 ) -> Option<(String, Device, Option<OsString>)> {
 781
 782     let mut result = None;
 783     let mut match_len = 0;
 784
 785     let root_path = std::path::Path::new("/");
 786     for (_id, entry) in mountinfo {
 787         if entry.root == root_path && path.starts_with(&entry.mount_point) {
 788             let len = entry.mount_point.as_path().as_os_str().len();
 789             if len > match_len {
 790                 match_len = len;
 791                 result = Some((entry.fs_type.clone(), entry.device, entry.mount_source.clone()));
 792             }
 793         }
 794     }
 795
 796     result
 797 }