src/bin/proxmox-backup-proxy.rs

   1 use std::sync::{Arc};
   2 use std::path::{Path, PathBuf};
   3 use std::os::unix::io::AsRawFd;
   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
  13 use proxmox_backup::{
  14     backup::DataStore,
  15     server::{
  16         UPID,
  17         WorkerTask,
  18         ApiConfig,
  19         rest::*,
  20         jobstate::{
  21             self,
  22             Job,
  23         },
  24         rotate_task_log_archive,
  25     },
  26     tools::systemd::time::{
  27         parse_calendar_event,
  28         compute_next_event,
  29     },
  30 };
  31
  32
  33 use proxmox_backup::api2::types::Authid;
  34 use proxmox_backup::configdir;
  35 use proxmox_backup::buildcfg;
  36 use proxmox_backup::server;
  37 use proxmox_backup::auth_helpers::*;
  38 use proxmox_backup::tools::{
  39     daemon,
  40     disks::{
  41         DiskManage,
  42         zfs_pool_stats,
  43     },
  44     socket::{
  45         set_tcp_keepalive,
  46         PROXMOX_BACKUP_TCP_KEEPALIVE_TIME,
  47     },
  48 };
  49
  50 use proxmox_backup::api2::pull::do_sync_job;
  51 use proxmox_backup::server::do_verification_job;
  52 use proxmox_backup::server::do_prune_job;
  53
  54 fn main() -> Result<(), Error> {
  55     proxmox_backup::tools::setup_safe_path_env();
  56
  57     let backup_uid = proxmox_backup::backup::backup_user()?.uid;
  58     let backup_gid = proxmox_backup::backup::backup_group()?.gid;
  59     let running_uid = nix::unistd::Uid::effective();
  60     let running_gid = nix::unistd::Gid::effective();
  61
  62     if running_uid != backup_uid || running_gid != backup_gid {
  63         bail!("proxy not running as backup user or group (got uid {} gid {})", running_uid, running_gid);
  64     }
  65
  66     proxmox_backup::tools::runtime::main(run())
  67 }
  68
  69 async fn run() -> Result<(), Error> {
  70     if let Err(err) = syslog::init(
  71         syslog::Facility::LOG_DAEMON,
  72         log::LevelFilter::Info,
  73         Some("proxmox-backup-proxy")) {
  74         bail!("unable to inititialize syslog - {}", err);
  75     }
  76
  77     let _ = public_auth_key(); // load with lazy_static
  78     let _ = csrf_secret(); // load with lazy_static
  79
  80     let mut config = ApiConfig::new(
  81         buildcfg::JS_DIR, &proxmox_backup::api2::ROUTER, RpcEnvironmentType::PUBLIC)?;
  82
  83     config.add_alias("novnc", "/usr/share/novnc-pve");
  84     config.add_alias("extjs", "/usr/share/javascript/extjs");
  85     config.add_alias("fontawesome", "/usr/share/fonts-font-awesome");
  86     config.add_alias("xtermjs", "/usr/share/pve-xtermjs");
  87     config.add_alias("locale", "/usr/share/pbs-i18n");
  88     config.add_alias("widgettoolkit", "/usr/share/javascript/proxmox-widget-toolkit");
  89     config.add_alias("css", "/usr/share/javascript/proxmox-backup/css");
  90     config.add_alias("docs", "/usr/share/doc/proxmox-backup/html");
  91
  92     let mut indexpath = PathBuf::from(buildcfg::JS_DIR);
  93     indexpath.push("index.hbs");
  94     config.register_template("index", &indexpath)?;
  95     config.register_template("console", "/usr/share/pve-xtermjs/index.html.hbs")?;
  96
  97     config.enable_file_log(buildcfg::API_ACCESS_LOG_FN)?;
  98
  99     let rest_server = RestServer::new(config);
 100
 101     //openssl req -x509 -newkey rsa:4096 -keyout /etc/proxmox-backup/proxy.key -out /etc/proxmox-backup/proxy.pem -nodes
 102     let key_path = configdir!("/proxy.key");
 103     let cert_path = configdir!("/proxy.pem");
 104
 105     let mut acceptor = SslAcceptor::mozilla_intermediate_v5(SslMethod::tls()).unwrap();
 106     acceptor.set_private_key_file(key_path, SslFiletype::PEM)
 107         .map_err(|err| format_err!("unable to read proxy key {} - {}", key_path, err))?;
 108     acceptor.set_certificate_chain_file(cert_path)
 109         .map_err(|err| format_err!("unable to read proxy cert {} - {}", cert_path, err))?;
 110     acceptor.check_private_key().unwrap();
 111
 112     let acceptor = Arc::new(acceptor.build());
 113
 114     let server = daemon::create_daemon(
 115         ([0,0,0,0,0,0,0,0], 8007).into(),
 116         |listener, ready| {
 117             let connections = proxmox_backup::tools::async_io::StaticIncoming::from(listener)
 118                 .map_err(Error::from)
 119                 .try_filter_map(move |(sock, _addr)| {
 120                     let acceptor = Arc::clone(&acceptor);
 121                     async move {
 122                         sock.set_nodelay(true).unwrap();
 123
 124                         let _ = set_tcp_keepalive(sock.as_raw_fd(), PROXMOX_BACKUP_TCP_KEEPALIVE_TIME);
 125
 126                         Ok(tokio_openssl::accept(&acceptor, sock)
 127                             .await
 128                             .ok() // handshake errors aren't be fatal, so return None to filter
 129                         )
 130                     }
 131                 });
 132             let connections = proxmox_backup::tools::async_io::HyperAccept(connections);
 133
 134             Ok(ready
 135                 .and_then(|_| hyper::Server::builder(connections)
 136                     .serve(rest_server)
 137                     .with_graceful_shutdown(server::shutdown_future())
 138                     .map_err(Error::from)
 139                 )
 140                 .map_err(|err| eprintln!("server error: {}", err))
 141                 .map(|_| ())
 142             )
 143         },
 144     );
 145
 146     daemon::systemd_notify(daemon::SystemdNotify::Ready)?;
 147
 148     let init_result: Result<(), Error> = try_block!({
 149         server::create_task_control_socket()?;
 150         server::server_state_init()?;
 151         Ok(())
 152     });
 153
 154     if let Err(err) = init_result {
 155         bail!("unable to start daemon - {}", err);
 156     }
 157
 158     start_task_scheduler();
 159     start_stat_generator();
 160
 161     server.await?;
 162     log::info!("server shutting down, waiting for active workers to complete");
 163     proxmox_backup::server::last_worker_future().await?;
 164     log::info!("done - exit server");
 165
 166     Ok(())
 167 }
 168
 169 fn start_stat_generator() {
 170     let abort_future = server::shutdown_future();
 171     let future = Box::pin(run_stat_generator());
 172     let task = futures::future::select(future, abort_future);
 173     tokio::spawn(task.map(|_| ()));
 174 }
 175
 176 fn start_task_scheduler() {
 177     let abort_future = server::shutdown_future();
 178     let future = Box::pin(run_task_scheduler());
 179     let task = futures::future::select(future, abort_future);
 180     tokio::spawn(task.map(|_| ()));
 181 }
 182
 183 use std::time::{SystemTime, Instant, Duration, UNIX_EPOCH};
 184
 185 fn next_minute() -> Result<Instant, Error> {
 186     let now = SystemTime::now();
 187     let epoch_now = now.duration_since(UNIX_EPOCH)?;
 188     let epoch_next = Duration::from_secs((epoch_now.as_secs()/60  + 1)*60);
 189     Ok(Instant::now() + epoch_next - epoch_now)
 190 }
 191
 192 async fn run_task_scheduler() {
 193
 194     let mut count: usize = 0;
 195
 196     loop {
 197         count += 1;
 198
 199         let delay_target = match next_minute() {  // try to run very minute
 200             Ok(d) => d,
 201             Err(err) => {
 202                 eprintln!("task scheduler: compute next minute failed - {}", err);
 203                 tokio::time::delay_until(tokio::time::Instant::from_std(Instant::now() + Duration::from_secs(60))).await;
 204                 continue;
 205             }
 206         };
 207
 208         if count > 2 { // wait 1..2 minutes before starting
 209             match schedule_tasks().catch_unwind().await {
 210                 Err(panic) => {
 211                     match panic.downcast::<&str>() {
 212                         Ok(msg) => {
 213                             eprintln!("task scheduler panic: {}", msg);
 214                         }
 215                         Err(_) => {
 216                             eprintln!("task scheduler panic - unknown type");
 217                         }
 218                     }
 219                 }
 220                 Ok(Err(err)) => {
 221                     eprintln!("task scheduler failed - {:?}", err);
 222                 }
 223                 Ok(Ok(_)) => {}
 224             }
 225         }
 226
 227         tokio::time::delay_until(tokio::time::Instant::from_std(delay_target)).await;
 228     }
 229 }
 230
 231 async fn schedule_tasks() -> Result<(), Error> {
 232
 233     schedule_datastore_garbage_collection().await;
 234     schedule_datastore_prune().await;
 235     schedule_datastore_sync_jobs().await;
 236     schedule_datastore_verify_jobs().await;
 237     schedule_task_log_rotate().await;
 238
 239     Ok(())
 240 }
 241
 242 async fn schedule_datastore_garbage_collection() {
 243
 244     use proxmox_backup::config::{
 245         datastore::{
 246             self,
 247             DataStoreConfig,
 248         },
 249     };
 250
 251     let config = match datastore::config() {
 252         Err(err) => {
 253             eprintln!("unable to read datastore config - {}", err);
 254             return;
 255         }
 256         Ok((config, _digest)) => config,
 257     };
 258
 259     for (store, (_, store_config)) in config.sections {
 260         let datastore = match DataStore::lookup_datastore(&store) {
 261             Ok(datastore) => datastore,
 262             Err(err) => {
 263                 eprintln!("lookup_datastore failed - {}", err);
 264                 continue;
 265             }
 266         };
 267
 268         let store_config: DataStoreConfig = match serde_json::from_value(store_config) {
 269             Ok(c) => c,
 270             Err(err) => {
 271                 eprintln!("datastore config from_value failed - {}", err);
 272                 continue;
 273             }
 274         };
 275
 276         let event_str = match store_config.gc_schedule {
 277             Some(event_str) => event_str,
 278             None => continue,
 279         };
 280
 281         let event = match parse_calendar_event(&event_str) {
 282             Ok(event) => event,
 283             Err(err) => {
 284                 eprintln!("unable to parse schedule '{}' - {}", event_str, err);
 285                 continue;
 286             }
 287         };
 288
 289         if datastore.garbage_collection_running() { continue; }
 290
 291         let worker_type = "garbage_collection";
 292
 293         let stat = datastore.last_gc_status();
 294         let last = if let Some(upid_str) = stat.upid {
 295             match upid_str.parse::<UPID>() {
 296                 Ok(upid) => upid.starttime,
 297                 Err(err) => {
 298                     eprintln!("unable to parse upid '{}' - {}", upid_str, err);
 299                     continue;
 300                 }
 301             }
 302         } else {
 303             match jobstate::last_run_time(worker_type, &store) {
 304                 Ok(time) => time,
 305                 Err(err) => {
 306                     eprintln!("could not get last run time of {} {}: {}", worker_type, store, err);
 307                     continue;
 308                 }
 309             }
 310         };
 311
 312         let next = match compute_next_event(&event, last, false) {
 313             Ok(Some(next)) => next,
 314             Ok(None) => continue,
 315             Err(err) => {
 316                 eprintln!("compute_next_event for '{}' failed - {}", event_str, err);
 317                 continue;
 318             }
 319         };
 320
 321         let now = proxmox::tools::time::epoch_i64();
 322
 323         if next > now  { continue; }
 324
 325         let job = match Job::new(worker_type, &store) {
 326             Ok(job) => job,
 327             Err(_) => continue, // could not get lock
 328         };
 329
 330         let auth_id = Authid::backup_auth_id();
 331
 332         if let Err(err) = crate::server::do_garbage_collection_job(job, datastore, auth_id, Some(event_str)) {
 333             eprintln!("unable to start garbage collection job on datastore {} - {}", store, err);
 334         }
 335     }
 336 }
 337
 338 async fn schedule_datastore_prune() {
 339
 340     use proxmox_backup::{
 341         backup::{
 342             PruneOptions,
 343         },
 344         config::datastore::{
 345             self,
 346             DataStoreConfig,
 347         },
 348     };
 349
 350     let config = match datastore::config() {
 351         Err(err) => {
 352             eprintln!("unable to read datastore config - {}", err);
 353             return;
 354         }
 355         Ok((config, _digest)) => config,
 356     };
 357
 358     for (store, (_, store_config)) in config.sections {
 359
 360         let store_config: DataStoreConfig = match serde_json::from_value(store_config) {
 361             Ok(c) => c,
 362             Err(err) => {
 363                 eprintln!("datastore '{}' config from_value failed - {}", store, err);
 364                 continue;
 365             }
 366         };
 367
 368         let event_str = match store_config.prune_schedule {
 369             Some(event_str) => event_str,
 370             None => continue,
 371         };
 372
 373         let prune_options = PruneOptions {
 374             keep_last: store_config.keep_last,
 375             keep_hourly: store_config.keep_hourly,
 376             keep_daily:  store_config.keep_daily,
 377             keep_weekly: store_config.keep_weekly,
 378             keep_monthly: store_config.keep_monthly,
 379             keep_yearly: store_config.keep_yearly,
 380         };
 381
 382         if !prune_options.keeps_something() { // no prune settings - keep all
 383             continue;
 384         }
 385
 386         let worker_type = "prune";
 387         if check_schedule(worker_type, &event_str, &store) {
 388             let job = match Job::new(worker_type, &store) {
 389                 Ok(job) => job,
 390                 Err(_) => continue, // could not get lock
 391             };
 392
 393             let auth_id = Authid::backup_auth_id().clone();
 394             if let Err(err) = do_prune_job(job, prune_options, store.clone(), &auth_id, Some(event_str)) {
 395                 eprintln!("unable to start datastore prune job {} - {}", &store, err);
 396             }
 397         };
 398     }
 399 }
 400
 401 async fn schedule_datastore_sync_jobs() {
 402
 403     use proxmox_backup::config::sync::{
 404         self,
 405         SyncJobConfig,
 406     };
 407
 408     let config = match sync::config() {
 409         Err(err) => {
 410             eprintln!("unable to read sync job config - {}", err);
 411             return;
 412         }
 413         Ok((config, _digest)) => config,
 414     };
 415
 416     for (job_id, (_, job_config)) in config.sections {
 417         let job_config: SyncJobConfig = match serde_json::from_value(job_config) {
 418             Ok(c) => c,
 419             Err(err) => {
 420                 eprintln!("sync job config from_value failed - {}", err);
 421                 continue;
 422             }
 423         };
 424
 425         let event_str = match job_config.schedule {
 426             Some(ref event_str) => event_str.clone(),
 427             None => continue,
 428         };
 429
 430         let worker_type = "syncjob";
 431         if check_schedule(worker_type, &event_str, &job_id) {
 432             let job = match Job::new(worker_type, &job_id) {
 433                 Ok(job) => job,
 434                 Err(_) => continue, // could not get lock
 435             };
 436
 437             let auth_id = Authid::backup_auth_id().clone();
 438             if let Err(err) = do_sync_job(job, job_config, &auth_id, Some(event_str)) {
 439                 eprintln!("unable to start datastore sync job {} - {}", &job_id, err);
 440             }
 441         };
 442     }
 443 }
 444
 445 async fn schedule_datastore_verify_jobs() {
 446
 447     use proxmox_backup::config::verify::{
 448         self,
 449         VerificationJobConfig,
 450     };
 451
 452     let config = match verify::config() {
 453         Err(err) => {
 454             eprintln!("unable to read verification job config - {}", err);
 455             return;
 456         }
 457         Ok((config, _digest)) => config,
 458     };
 459     for (job_id, (_, job_config)) in config.sections {
 460         let job_config: VerificationJobConfig = match serde_json::from_value(job_config) {
 461             Ok(c) => c,
 462             Err(err) => {
 463                 eprintln!("verification job config from_value failed - {}", err);
 464                 continue;
 465             }
 466         };
 467         let event_str = match job_config.schedule {
 468             Some(ref event_str) => event_str.clone(),
 469             None => continue,
 470         };
 471
 472         let worker_type = "verificationjob";
 473         let auth_id = Authid::backup_auth_id().clone();
 474         if check_schedule(worker_type, &event_str, &job_id) {
 475             let job = match Job::new(&worker_type, &job_id) {
 476                 Ok(job) => job,
 477                 Err(_) => continue, // could not get lock
 478             };
 479             if let Err(err) = do_verification_job(job, job_config, &auth_id, Some(event_str)) {
 480                 eprintln!("unable to start datastore verification job {} - {}", &job_id, err);
 481             }
 482         };
 483     }
 484 }
 485
 486 async fn schedule_task_log_rotate() {
 487
 488     let worker_type = "logrotate";
 489     let job_id = "task_archive";
 490
 491     // schedule daily at 00:00 like normal logrotate
 492     let schedule = "00:00";
 493
 494     if !check_schedule(worker_type, schedule, job_id) {
 495         // if we never ran the rotation, schedule instantly
 496         match jobstate::JobState::load(worker_type, job_id) {
 497             Ok(state) => match state {
 498                 jobstate::JobState::Created { .. } => {},
 499                 _ => return,
 500             },
 501             _ => return,
 502         }
 503     }
 504
 505     let mut job = match Job::new(worker_type, job_id) {
 506         Ok(job) => job,
 507         Err(_) => return, // could not get lock
 508     };
 509
 510     if let Err(err) = WorkerTask::new_thread(
 511         worker_type,
 512         Some(job_id.to_string()),
 513         Authid::backup_auth_id().clone(),
 514         false,
 515         move |worker| {
 516             job.start(&worker.upid().to_string())?;
 517             worker.log(format!("starting task log rotation"));
 518
 519             let result = try_block!({
 520                 // rotate task log archive
 521                 let max_size = 500000; // a normal entry has about 100b, so ~ 5000 entries/file
 522                 let max_files = 20; // times twenty files gives at least 100000 task entries
 523                 let has_rotated = rotate_task_log_archive(max_size, true, Some(max_files))?;
 524                 if has_rotated {
 525                     worker.log(format!("task log archive was rotated"));
 526                 } else {
 527                     worker.log(format!("task log archive was not rotated"));
 528                 }
 529
 530                 Ok(())
 531             });
 532
 533             let status = worker.create_state(&result);
 534
 535             if let Err(err) = job.finish(status) {
 536                 eprintln!("could not finish job state for {}: {}", worker_type, err);
 537             }
 538
 539             result
 540         },
 541     ) {
 542         eprintln!("unable to start task log rotation: {}", err);
 543     }
 544
 545 }
 546
 547 async fn run_stat_generator() {
 548
 549     let mut count = 0;
 550     loop {
 551         count += 1;
 552         let save = if count >= 6 { count = 0; true } else { false };
 553
 554         let delay_target = Instant::now() +  Duration::from_secs(10);
 555
 556         generate_host_stats(save).await;
 557
 558         tokio::time::delay_until(tokio::time::Instant::from_std(delay_target)).await;
 559
 560      }
 561
 562 }
 563
 564 fn rrd_update_gauge(name: &str, value: f64, save: bool) {
 565     use proxmox_backup::rrd;
 566     if let Err(err) = rrd::update_value(name, value, rrd::DST::Gauge, save) {
 567         eprintln!("rrd::update_value '{}' failed - {}", name, err);
 568     }
 569 }
 570
 571 fn rrd_update_derive(name: &str, value: f64, save: bool) {
 572     use proxmox_backup::rrd;
 573     if let Err(err) = rrd::update_value(name, value, rrd::DST::Derive, save) {
 574         eprintln!("rrd::update_value '{}' failed - {}", name, err);
 575     }
 576 }
 577
 578 async fn generate_host_stats(save: bool) {
 579     use proxmox::sys::linux::procfs::{
 580         read_meminfo, read_proc_stat, read_proc_net_dev, read_loadavg};
 581     use proxmox_backup::config::datastore;
 582
 583
 584     proxmox_backup::tools::runtime::block_in_place(move || {
 585
 586         match read_proc_stat() {
 587             Ok(stat) => {
 588                 rrd_update_gauge("host/cpu", stat.cpu, save);
 589                 rrd_update_gauge("host/iowait", stat.iowait_percent, save);
 590             }
 591             Err(err) => {
 592                 eprintln!("read_proc_stat failed - {}", err);
 593             }
 594         }
 595
 596         match read_meminfo() {
 597             Ok(meminfo) => {
 598                 rrd_update_gauge("host/memtotal", meminfo.memtotal as f64, save);
 599                 rrd_update_gauge("host/memused", meminfo.memused as f64, save);
 600                 rrd_update_gauge("host/swaptotal", meminfo.swaptotal as f64, save);
 601                 rrd_update_gauge("host/swapused", meminfo.swapused as f64, save);
 602             }
 603             Err(err) => {
 604                 eprintln!("read_meminfo failed - {}", err);
 605             }
 606         }
 607
 608         match read_proc_net_dev() {
 609             Ok(netdev) => {
 610                 use proxmox_backup::config::network::is_physical_nic;
 611                 let mut netin = 0;
 612                 let mut netout = 0;
 613                 for item in netdev {
 614                     if !is_physical_nic(&item.device) { continue; }
 615                     netin += item.receive;
 616                     netout += item.send;
 617                 }
 618                 rrd_update_derive("host/netin", netin as f64, save);
 619                 rrd_update_derive("host/netout", netout as f64, save);
 620             }
 621             Err(err) => {
 622                 eprintln!("read_prox_net_dev failed - {}", err);
 623             }
 624         }
 625
 626         match read_loadavg() {
 627             Ok(loadavg) => {
 628                 rrd_update_gauge("host/loadavg", loadavg.0 as f64, save);
 629             }
 630             Err(err) => {
 631                 eprintln!("read_loadavg failed - {}", err);
 632             }
 633         }
 634
 635         let disk_manager = DiskManage::new();
 636
 637         gather_disk_stats(disk_manager.clone(), Path::new("/"), "host", save);
 638
 639         match datastore::config() {
 640             Ok((config, _)) => {
 641                 let datastore_list: Vec<datastore::DataStoreConfig> =
 642                     config.convert_to_typed_array("datastore").unwrap_or(Vec::new());
 643
 644                 for config in datastore_list {
 645
 646                     let rrd_prefix = format!("datastore/{}", config.name);
 647                     let path = std::path::Path::new(&config.path);
 648                     gather_disk_stats(disk_manager.clone(), path, &rrd_prefix, save);
 649                 }
 650             }
 651             Err(err) => {
 652                 eprintln!("read datastore config failed - {}", err);
 653             }
 654         }
 655
 656     });
 657 }
 658
 659 fn check_schedule(worker_type: &str, event_str: &str, id: &str) -> bool {
 660     let event = match parse_calendar_event(event_str) {
 661         Ok(event) => event,
 662         Err(err) => {
 663             eprintln!("unable to parse schedule '{}' - {}", event_str, err);
 664             return false;
 665         }
 666     };
 667
 668     let last = match jobstate::last_run_time(worker_type, &id) {
 669         Ok(time) => time,
 670         Err(err) => {
 671             eprintln!("could not get last run time of {} {}: {}", worker_type, id, err);
 672             return false;
 673         }
 674     };
 675
 676     let next = match compute_next_event(&event, last, false) {
 677         Ok(Some(next)) => next,
 678         Ok(None) => return false,
 679         Err(err) => {
 680             eprintln!("compute_next_event for '{}' failed - {}", event_str, err);
 681             return false;
 682         }
 683     };
 684
 685     let now = proxmox::tools::time::epoch_i64();
 686     next <= now
 687 }
 688
 689 fn gather_disk_stats(disk_manager: Arc<DiskManage>, path: &Path, rrd_prefix: &str, save: bool) {
 690
 691     match proxmox_backup::tools::disks::disk_usage(path) {
 692         Ok(status) => {
 693             let rrd_key = format!("{}/total", rrd_prefix);
 694             rrd_update_gauge(&rrd_key, status.total as f64, save);
 695             let rrd_key = format!("{}/used", rrd_prefix);
 696             rrd_update_gauge(&rrd_key, status.used as f64, save);
 697         }
 698         Err(err) => {
 699             eprintln!("read disk_usage on {:?} failed - {}", path, err);
 700         }
 701     }
 702
 703     match disk_manager.find_mounted_device(path) {
 704         Ok(None) => {},
 705         Ok(Some((fs_type, device, source))) => {
 706             let mut device_stat = None;
 707             match fs_type.as_str() {
 708                 "zfs" => {
 709                     if let Some(pool) = source {
 710                         match zfs_pool_stats(&pool) {
 711                             Ok(stat) => device_stat = stat,
 712                             Err(err) => eprintln!("zfs_pool_stats({:?}) failed - {}", pool, err),
 713                         }
 714                     }
 715                 }
 716                 _ => {
 717                     if let Ok(disk) = disk_manager.clone().disk_by_dev_num(device.into_dev_t()) {
 718                         match disk.read_stat() {
 719                             Ok(stat) => device_stat = stat,
 720                             Err(err) => eprintln!("disk.read_stat {:?} failed - {}", path, err),
 721                         }
 722                     }
 723                 }
 724             }
 725             if let Some(stat) = device_stat {
 726                 let rrd_key = format!("{}/read_ios", rrd_prefix);
 727                 rrd_update_derive(&rrd_key, stat.read_ios as f64, save);
 728                 let rrd_key = format!("{}/read_bytes", rrd_prefix);
 729                 rrd_update_derive(&rrd_key, (stat.read_sectors*512) as f64, save);
 730
 731                 let rrd_key = format!("{}/write_ios", rrd_prefix);
 732                 rrd_update_derive(&rrd_key, stat.write_ios as f64, save);
 733                 let rrd_key = format!("{}/write_bytes", rrd_prefix);
 734                 rrd_update_derive(&rrd_key, (stat.write_sectors*512) as f64, save);
 735
 736                 let rrd_key = format!("{}/io_ticks", rrd_prefix);
 737                 rrd_update_derive(&rrd_key, (stat.io_ticks as f64)/1000.0, save);
 738             }
 739         }
 740         Err(err) => {
 741             eprintln!("find_mounted_device failed - {}", err);
 742         }
 743     }
 744 }