Line data Source code
1 : use std::borrow::Cow;
2 : use std::collections::HashMap;
3 : use std::sync::Arc;
4 : use std::time::{Duration, Instant};
5 :
6 : use json_structural_diff::JsonDiff;
7 : use pageserver_api::controller_api::{AvailabilityZone, MigrationConfig, PlacementPolicy};
8 : use pageserver_api::models::{
9 : LocationConfig, LocationConfigMode, LocationConfigSecondary, TenantConfig, TenantWaitLsnRequest,
10 : };
11 : use pageserver_api::shard::{ShardIdentity, TenantShardId};
12 : use pageserver_client::mgmt_api;
13 : use reqwest::StatusCode;
14 : use tokio_util::sync::CancellationToken;
15 : use utils::backoff::exponential_backoff;
16 : use utils::generation::Generation;
17 : use utils::id::{NodeId, TimelineId};
18 : use utils::lsn::Lsn;
19 : use utils::pausable_failpoint;
20 : use utils::sync::gate::GateGuard;
21 :
22 : use crate::compute_hook::{ComputeHook, NotifyError};
23 : use crate::node::Node;
24 : use crate::pageserver_client::PageserverClient;
25 : use crate::persistence::Persistence;
26 : use crate::tenant_shard::{IntentState, ObservedState, ObservedStateDelta, ObservedStateLocation};
27 : use crate::{compute_hook, service};
28 :
29 : const DEFAULT_HEATMAP_PERIOD: Duration = Duration::from_secs(60);
30 :
31 : /// Object with the lifetime of the background reconcile task that is created
32 : /// for tenants which have a difference between their intent and observed states.
33 : pub(super) struct Reconciler {
34 : /// See [`crate::tenant_shard::TenantShard`] for the meanings of these fields: they are a snapshot
35 : /// of a tenant's state from when we spawned a reconcile task.
36 : pub(super) tenant_shard_id: TenantShardId,
37 : pub(crate) shard: ShardIdentity,
38 : pub(crate) placement_policy: PlacementPolicy,
39 : pub(crate) generation: Option<Generation>,
40 : pub(crate) intent: TargetState,
41 :
42 : /// Nodes not referenced by [`Self::intent`], from which we should try
43 : /// to detach this tenant shard.
44 : pub(crate) detach: Vec<Node>,
45 :
46 : /// Configuration specific to this reconciler
47 : pub(crate) reconciler_config: ReconcilerConfig,
48 :
49 : pub(crate) config: TenantConfig,
50 : pub(crate) preferred_az: Option<AvailabilityZone>,
51 :
52 : /// Observed state from the point of view of the reconciler.
53 : /// This gets updated as the reconciliation makes progress.
54 : pub(crate) observed: ObservedState,
55 :
56 : /// Snapshot of the observed state at the point when the reconciler
57 : /// was spawned.
58 : pub(crate) original_observed: ObservedState,
59 :
60 : pub(crate) service_config: service::Config,
61 :
62 : /// A hook to notify the running postgres instances when we change the location
63 : /// of a tenant. Use this via [`Self::compute_notify`] to update our failure flag
64 : /// and guarantee eventual retries.
65 : pub(crate) compute_hook: Arc<ComputeHook>,
66 :
67 : /// To avoid stalling if the cloud control plane is unavailable, we may proceed
68 : /// past failures in [`ComputeHook::notify`], but we _must_ remember that we failed
69 : /// so that we can set [`crate::tenant_shard::TenantShard::pending_compute_notification`] to ensure a later retry.
70 : pub(crate) compute_notify_failure: bool,
71 :
72 : /// Reconciler is responsible for keeping alive semaphore units that limit concurrency on how many
73 : /// we will spawn.
74 : pub(crate) _resource_units: ReconcileUnits,
75 :
76 : /// A means to abort background reconciliation: it is essential to
77 : /// call this when something changes in the original TenantShard that
78 : /// will make this reconciliation impossible or unnecessary, for
79 : /// example when a pageserver node goes offline, or the PlacementPolicy for
80 : /// the tenant is changed.
81 : pub(crate) cancel: CancellationToken,
82 :
83 : /// Reconcilers are registered with a Gate so that during a graceful shutdown we
84 : /// can wait for all the reconcilers to respond to their cancellation tokens.
85 : pub(crate) _gate_guard: GateGuard,
86 :
87 : /// Access to persistent storage for updating generation numbers
88 : pub(crate) persistence: Arc<Persistence>,
89 : }
90 :
91 : pub(crate) struct ReconcilerConfigBuilder {
92 : config: ReconcilerConfig,
93 : }
94 :
95 : impl ReconcilerConfigBuilder {
96 : /// Priority is special: you must pick one thoughtfully, do not just use 'normal' as the default
97 0 : pub(crate) fn new(priority: ReconcilerPriority) -> Self {
98 0 : Self {
99 0 : config: ReconcilerConfig::new(priority),
100 0 : }
101 0 : }
102 :
103 0 : pub(crate) fn secondary_warmup_timeout(self, value: Duration) -> Self {
104 0 : Self {
105 0 : config: ReconcilerConfig {
106 0 : secondary_warmup_timeout: Some(value),
107 0 : ..self.config
108 0 : },
109 0 : }
110 0 : }
111 :
112 0 : pub(crate) fn secondary_download_request_timeout(self, value: Duration) -> Self {
113 0 : Self {
114 0 : config: ReconcilerConfig {
115 0 : secondary_download_request_timeout: Some(value),
116 0 : ..self.config
117 0 : },
118 0 : }
119 0 : }
120 :
121 0 : pub(crate) fn tenant_creation_hint(self, hint: bool) -> Self {
122 0 : Self {
123 0 : config: ReconcilerConfig {
124 0 : tenant_creation_hint: hint,
125 0 : ..self.config
126 0 : },
127 0 : }
128 0 : }
129 :
130 0 : pub(crate) fn build(self) -> ReconcilerConfig {
131 0 : self.config
132 0 : }
133 : }
134 :
135 : // Higher priorities are used for user-facing tasks, so that a long backlog of housekeeping work (e.g. reconciling on startup, rescheduling
136 : // things on node changes) does not starve user-facing tasks.
137 : #[derive(Debug, Copy, Clone)]
138 : pub(crate) enum ReconcilerPriority {
139 : Normal,
140 : High,
141 : }
142 :
143 : #[derive(Debug, Copy, Clone)]
144 : pub(crate) struct ReconcilerConfig {
145 : pub(crate) priority: ReconcilerPriority,
146 :
147 : // During live migration give up on warming-up the secondary
148 : // after this timeout.
149 : secondary_warmup_timeout: Option<Duration>,
150 :
151 : // During live migrations this is the amount of time that
152 : // the pagserver will hold our poll.
153 : secondary_download_request_timeout: Option<Duration>,
154 :
155 : // A hint indicating whether this reconciliation is done on the
156 : // creation of a new tenant. This only informs logging behaviour.
157 : tenant_creation_hint: bool,
158 : }
159 :
160 : impl ReconcilerConfig {
161 : /// Configs are always constructed with an explicit priority, to force callers to think about whether
162 : /// the operation they're scheduling is high-priority or not. Normal priority is not a safe default, because
163 : /// scheduling something user-facing at normal priority can result in it getting starved out by background work.
164 0 : pub(crate) fn new(priority: ReconcilerPriority) -> Self {
165 0 : Self {
166 0 : priority,
167 0 : secondary_warmup_timeout: None,
168 0 : secondary_download_request_timeout: None,
169 0 : tenant_creation_hint: false,
170 0 : }
171 0 : }
172 :
173 0 : pub(crate) fn get_secondary_warmup_timeout(&self) -> Duration {
174 : const SECONDARY_WARMUP_TIMEOUT_DEFAULT: Duration = Duration::from_secs(300);
175 0 : self.secondary_warmup_timeout
176 0 : .unwrap_or(SECONDARY_WARMUP_TIMEOUT_DEFAULT)
177 0 : }
178 :
179 0 : pub(crate) fn get_secondary_download_request_timeout(&self) -> Duration {
180 : const SECONDARY_DOWNLOAD_REQUEST_TIMEOUT_DEFAULT: Duration = Duration::from_secs(20);
181 0 : self.secondary_download_request_timeout
182 0 : .unwrap_or(SECONDARY_DOWNLOAD_REQUEST_TIMEOUT_DEFAULT)
183 0 : }
184 :
185 0 : pub(crate) fn tenant_creation_hint(&self) -> bool {
186 0 : self.tenant_creation_hint
187 0 : }
188 : }
189 :
190 : impl From<&MigrationConfig> for ReconcilerConfig {
191 0 : fn from(value: &MigrationConfig) -> Self {
192 0 : // Run reconciler at high priority because MigrationConfig comes from human requests that should
193 0 : // be presumed urgent.
194 0 : let mut builder = ReconcilerConfigBuilder::new(ReconcilerPriority::High);
195 :
196 0 : if let Some(timeout) = value.secondary_warmup_timeout {
197 0 : builder = builder.secondary_warmup_timeout(timeout)
198 0 : }
199 :
200 0 : if let Some(timeout) = value.secondary_download_request_timeout {
201 0 : builder = builder.secondary_download_request_timeout(timeout)
202 0 : }
203 :
204 0 : builder.build()
205 0 : }
206 : }
207 :
208 : /// RAII resource units granted to a Reconciler, which it should keep alive until it finishes doing I/O
209 : pub(crate) struct ReconcileUnits {
210 : _sem_units: tokio::sync::OwnedSemaphorePermit,
211 : }
212 :
213 : impl ReconcileUnits {
214 0 : pub(crate) fn new(sem_units: tokio::sync::OwnedSemaphorePermit) -> Self {
215 0 : Self {
216 0 : _sem_units: sem_units,
217 0 : }
218 0 : }
219 : }
220 :
221 : /// This is a snapshot of [`crate::tenant_shard::IntentState`], but it does not do any
222 : /// reference counting for Scheduler. The IntentState is what the scheduler works with,
223 : /// and the TargetState is just the instruction for a particular Reconciler run.
224 : #[derive(Debug)]
225 : pub(crate) struct TargetState {
226 : pub(crate) attached: Option<Node>,
227 : pub(crate) secondary: Vec<Node>,
228 : }
229 :
230 : impl TargetState {
231 0 : pub(crate) fn from_intent(nodes: &HashMap<NodeId, Node>, intent: &IntentState) -> Self {
232 0 : Self {
233 0 : attached: intent.get_attached().map(|n| {
234 0 : nodes
235 0 : .get(&n)
236 0 : .expect("Intent attached referenced non-existent node")
237 0 : .clone()
238 0 : }),
239 0 : secondary: intent
240 0 : .get_secondary()
241 0 : .iter()
242 0 : .map(|n| {
243 0 : nodes
244 0 : .get(n)
245 0 : .expect("Intent secondary referenced non-existent node")
246 0 : .clone()
247 0 : })
248 0 : .collect(),
249 0 : }
250 0 : }
251 : }
252 :
253 : #[derive(thiserror::Error, Debug)]
254 : pub(crate) enum ReconcileError {
255 : #[error(transparent)]
256 : Remote(#[from] mgmt_api::Error),
257 : #[error(transparent)]
258 : Notify(#[from] NotifyError),
259 : #[error("Cancelled")]
260 : Cancel,
261 : #[error(transparent)]
262 : Other(#[from] anyhow::Error),
263 : }
264 :
265 : impl Reconciler {
266 0 : async fn location_config(
267 0 : &mut self,
268 0 : node: &Node,
269 0 : config: LocationConfig,
270 0 : flush_ms: Option<Duration>,
271 0 : lazy: bool,
272 0 : ) -> Result<(), ReconcileError> {
273 0 : if !node.is_available() && config.mode == LocationConfigMode::Detached {
274 : // [`crate::service::Service::node_activate_reconcile`] will update the observed state
275 : // when the node comes back online. At that point, the intent and observed states will
276 : // be mismatched and a background reconciliation will detach.
277 0 : tracing::info!(
278 0 : "Node {node} is unavailable during detach: proceeding anyway, it will be detached via background reconciliation"
279 : );
280 0 : return Ok(());
281 0 : }
282 0 :
283 0 : self.observed
284 0 : .locations
285 0 : .insert(node.get_id(), ObservedStateLocation { conf: None });
286 0 :
287 0 : // TODO: amend locations that use long-polling: they will hit this timeout.
288 0 : let timeout = Duration::from_secs(25);
289 0 :
290 0 : tracing::info!("location_config({node}) calling: {:?}", config);
291 0 : let tenant_shard_id = self.tenant_shard_id;
292 0 : let config_ref = &config;
293 0 : match node
294 0 : .with_client_retries(
295 0 : |client| async move {
296 0 : let config = config_ref.clone();
297 0 : client
298 0 : .location_config(tenant_shard_id, config.clone(), flush_ms, lazy)
299 0 : .await
300 0 : },
301 0 : &self.service_config.pageserver_jwt_token,
302 0 : &self.service_config.ssl_ca_cert,
303 0 : 1,
304 0 : 3,
305 0 : timeout,
306 0 : &self.cancel,
307 0 : )
308 0 : .await
309 : {
310 0 : Some(Ok(_)) => {}
311 0 : Some(Err(e)) => return Err(e.into()),
312 0 : None => return Err(ReconcileError::Cancel),
313 : };
314 0 : tracing::info!("location_config({node}) complete: {:?}", config);
315 :
316 0 : match config.mode {
317 0 : LocationConfigMode::Detached => {
318 0 : self.observed.locations.remove(&node.get_id());
319 0 : }
320 0 : _ => {
321 0 : self.observed
322 0 : .locations
323 0 : .insert(node.get_id(), ObservedStateLocation { conf: Some(config) });
324 0 : }
325 : }
326 :
327 0 : Ok(())
328 0 : }
329 :
330 0 : fn get_node(&self, node_id: &NodeId) -> Option<&Node> {
331 0 : if let Some(node) = self.intent.attached.as_ref() {
332 0 : if node.get_id() == *node_id {
333 0 : return Some(node);
334 0 : }
335 0 : }
336 :
337 0 : if let Some(node) = self
338 0 : .intent
339 0 : .secondary
340 0 : .iter()
341 0 : .find(|n| n.get_id() == *node_id)
342 : {
343 0 : return Some(node);
344 0 : }
345 :
346 0 : if let Some(node) = self.detach.iter().find(|n| n.get_id() == *node_id) {
347 0 : return Some(node);
348 0 : }
349 0 :
350 0 : None
351 0 : }
352 :
353 0 : async fn maybe_live_migrate(&mut self) -> Result<(), ReconcileError> {
354 0 : let destination = if let Some(node) = &self.intent.attached {
355 0 : match self.observed.locations.get(&node.get_id()) {
356 0 : Some(conf) => {
357 : // We will do a live migration only if the intended destination is not
358 : // currently in an attached state.
359 0 : match &conf.conf {
360 0 : Some(conf) if conf.mode == LocationConfigMode::Secondary => {
361 0 : // Fall through to do a live migration
362 0 : node
363 : }
364 : None | Some(_) => {
365 : // Attached or uncertain: don't do a live migration, proceed
366 : // with a general-case reconciliation
367 0 : tracing::info!("maybe_live_migrate: destination is None or attached");
368 0 : return Ok(());
369 : }
370 : }
371 : }
372 : None => {
373 : // Our destination is not attached: maybe live migrate if some other
374 : // node is currently attached. Fall through.
375 0 : node
376 : }
377 : }
378 : } else {
379 : // No intent to be attached
380 0 : tracing::info!("maybe_live_migrate: no attached intent");
381 0 : return Ok(());
382 : };
383 :
384 0 : let mut origin = None;
385 0 : for (node_id, state) in &self.observed.locations {
386 0 : if let Some(observed_conf) = &state.conf {
387 0 : if observed_conf.mode == LocationConfigMode::AttachedSingle {
388 : // We will only attempt live migration if the origin is not offline: this
389 : // avoids trying to do it while reconciling after responding to an HA failover.
390 0 : if let Some(node) = self.get_node(node_id) {
391 0 : if node.is_available() {
392 0 : origin = Some(node.clone());
393 0 : break;
394 0 : }
395 0 : }
396 0 : }
397 0 : }
398 : }
399 :
400 0 : let Some(origin) = origin else {
401 0 : tracing::info!("maybe_live_migrate: no origin found");
402 0 : return Ok(());
403 : };
404 :
405 : // We have an origin and a destination: proceed to do the live migration
406 0 : tracing::info!("Live migrating {}->{}", origin, destination);
407 0 : self.live_migrate(origin, destination.clone()).await?;
408 :
409 0 : Ok(())
410 0 : }
411 :
412 0 : async fn wait_lsn(
413 0 : &self,
414 0 : node: &Node,
415 0 : tenant_shard_id: TenantShardId,
416 0 : timelines: HashMap<TimelineId, Lsn>,
417 0 : ) -> Result<StatusCode, ReconcileError> {
418 : const TIMEOUT: Duration = Duration::from_secs(10);
419 :
420 0 : let client = PageserverClient::new(
421 0 : node.get_id(),
422 0 : node.base_url(),
423 0 : self.service_config.pageserver_jwt_token.as_deref(),
424 0 : self.service_config.ssl_ca_cert.clone(),
425 0 : )?;
426 :
427 0 : client
428 0 : .wait_lsn(
429 0 : tenant_shard_id,
430 0 : TenantWaitLsnRequest {
431 0 : timelines,
432 0 : timeout: TIMEOUT,
433 0 : },
434 0 : )
435 0 : .await
436 0 : .map_err(|e| e.into())
437 0 : }
438 :
439 0 : async fn get_lsns(
440 0 : &self,
441 0 : tenant_shard_id: TenantShardId,
442 0 : node: &Node,
443 0 : ) -> anyhow::Result<HashMap<TimelineId, Lsn>> {
444 0 : let client = PageserverClient::new(
445 0 : node.get_id(),
446 0 : node.base_url(),
447 0 : self.service_config.pageserver_jwt_token.as_deref(),
448 0 : self.service_config.ssl_ca_cert.clone(),
449 0 : )?;
450 :
451 0 : let timelines = client.timeline_list(&tenant_shard_id).await?;
452 0 : Ok(timelines
453 0 : .into_iter()
454 0 : .map(|t| (t.timeline_id, t.last_record_lsn))
455 0 : .collect())
456 0 : }
457 :
458 0 : async fn secondary_download(
459 0 : &self,
460 0 : tenant_shard_id: TenantShardId,
461 0 : node: &Node,
462 0 : ) -> Result<(), ReconcileError> {
463 0 : // This is not the timeout for a request, but the total amount of time we're willing to wait
464 0 : // for a secondary location to get up to date before
465 0 : let total_download_timeout = self.reconciler_config.get_secondary_warmup_timeout();
466 0 :
467 0 : // This the long-polling interval for the secondary download requests we send to destination pageserver
468 0 : // during a migration.
469 0 : let request_download_timeout = self
470 0 : .reconciler_config
471 0 : .get_secondary_download_request_timeout();
472 0 :
473 0 : let started_at = Instant::now();
474 :
475 : loop {
476 0 : let (status, progress) = match node
477 0 : .with_client_retries(
478 0 : |client| async move {
479 0 : client
480 0 : .tenant_secondary_download(
481 0 : tenant_shard_id,
482 0 : Some(request_download_timeout),
483 0 : )
484 0 : .await
485 0 : },
486 0 : &self.service_config.pageserver_jwt_token,
487 0 : &self.service_config.ssl_ca_cert,
488 0 : 1,
489 0 : 3,
490 0 : request_download_timeout * 2,
491 0 : &self.cancel,
492 0 : )
493 0 : .await
494 : {
495 0 : None => Err(ReconcileError::Cancel),
496 0 : Some(Ok(v)) => Ok(v),
497 0 : Some(Err(e)) => {
498 0 : // Give up, but proceed: it's unfortunate if we couldn't freshen the destination before
499 0 : // attaching, but we should not let an issue with a secondary location stop us proceeding
500 0 : // with a live migration.
501 0 : tracing::warn!("Failed to prepare by downloading layers on node {node}: {e})");
502 0 : return Ok(());
503 : }
504 0 : }?;
505 :
506 0 : if status == StatusCode::OK {
507 0 : tracing::info!(
508 0 : "Downloads to {} complete: {}/{} layers, {}/{} bytes",
509 : node,
510 : progress.layers_downloaded,
511 : progress.layers_total,
512 : progress.bytes_downloaded,
513 : progress.bytes_total
514 : );
515 0 : return Ok(());
516 0 : } else if status == StatusCode::ACCEPTED {
517 0 : let total_runtime = started_at.elapsed();
518 0 : if total_runtime > total_download_timeout {
519 0 : tracing::warn!(
520 0 : "Timed out after {}ms downloading layers to {node}. Progress so far: {}/{} layers, {}/{} bytes",
521 0 : total_runtime.as_millis(),
522 : progress.layers_downloaded,
523 : progress.layers_total,
524 : progress.bytes_downloaded,
525 : progress.bytes_total
526 : );
527 : // Give up, but proceed: an incompletely warmed destination doesn't prevent migration working,
528 : // it just makes the I/O performance for users less good.
529 0 : return Ok(());
530 0 : }
531 0 :
532 0 : // Log and proceed around the loop to retry. We don't sleep between requests, because our HTTP call
533 0 : // to the pageserver is a long-poll.
534 0 : tracing::info!(
535 0 : "Downloads to {} not yet complete: {}/{} layers, {}/{} bytes",
536 : node,
537 : progress.layers_downloaded,
538 : progress.layers_total,
539 : progress.bytes_downloaded,
540 : progress.bytes_total
541 : );
542 0 : }
543 : }
544 0 : }
545 :
546 : /// This function does _not_ mutate any state, so it is cancellation safe.
547 : ///
548 : /// This function does not respect [`Self::cancel`], callers should handle that.
549 0 : async fn await_lsn(
550 0 : &self,
551 0 : tenant_shard_id: TenantShardId,
552 0 : node: &Node,
553 0 : baseline: HashMap<TimelineId, Lsn>,
554 0 : ) -> anyhow::Result<()> {
555 : // Signal to the pageserver that it should ingest up to the baseline LSNs.
556 : loop {
557 0 : match self.wait_lsn(node, tenant_shard_id, baseline.clone()).await {
558 : Ok(StatusCode::OK) => {
559 : // Everything is caught up
560 0 : return Ok(());
561 : }
562 : Ok(StatusCode::ACCEPTED) => {
563 : // Some timelines are not caught up yet.
564 : // They'll be polled below.
565 0 : break;
566 : }
567 : Ok(StatusCode::NOT_FOUND) => {
568 : // None of the timelines are present on the pageserver.
569 : // This is correct if they've all been deleted, but
570 : // let let the polling loop below cross check.
571 0 : break;
572 : }
573 0 : Ok(status_code) => {
574 0 : tracing::warn!(
575 0 : "Unexpected status code ({status_code}) returned by wait_lsn endpoint"
576 : );
577 0 : break;
578 : }
579 0 : Err(e) => {
580 0 : tracing::info!("🕑 Can't trigger LSN wait on {node} yet, waiting ({e})",);
581 0 : tokio::time::sleep(Duration::from_millis(500)).await;
582 0 : continue;
583 : }
584 : }
585 : }
586 :
587 : // Poll the LSNs until they catch up
588 : loop {
589 0 : let latest = match self.get_lsns(tenant_shard_id, node).await {
590 0 : Ok(l) => l,
591 0 : Err(e) => {
592 0 : tracing::info!("🕑 Can't get LSNs on node {node} yet, waiting ({e})",);
593 0 : tokio::time::sleep(Duration::from_millis(500)).await;
594 0 : continue;
595 : }
596 : };
597 :
598 0 : let mut any_behind: bool = false;
599 0 : for (timeline_id, baseline_lsn) in &baseline {
600 0 : match latest.get(timeline_id) {
601 0 : Some(latest_lsn) => {
602 0 : tracing::info!(timeline_id = %timeline_id, "🕑 LSN origin {baseline_lsn} vs destination {latest_lsn}");
603 0 : if latest_lsn < baseline_lsn {
604 0 : any_behind = true;
605 0 : }
606 : }
607 0 : None => {
608 0 : // Timeline was deleted in the meantime - ignore it
609 0 : }
610 : }
611 : }
612 :
613 0 : if !any_behind {
614 0 : tracing::info!("✅ LSN caught up. Proceeding...");
615 0 : break;
616 : } else {
617 0 : tokio::time::sleep(Duration::from_millis(500)).await;
618 : }
619 : }
620 :
621 0 : Ok(())
622 0 : }
623 :
624 0 : pub async fn live_migrate(
625 0 : &mut self,
626 0 : origin_ps: Node,
627 0 : dest_ps: Node,
628 0 : ) -> Result<(), ReconcileError> {
629 0 : // `maybe_live_migrate` is responsibble for sanity of inputs
630 0 : assert!(origin_ps.get_id() != dest_ps.get_id());
631 :
632 0 : fn build_location_config(
633 0 : shard: &ShardIdentity,
634 0 : config: &TenantConfig,
635 0 : mode: LocationConfigMode,
636 0 : generation: Option<Generation>,
637 0 : secondary_conf: Option<LocationConfigSecondary>,
638 0 : ) -> LocationConfig {
639 0 : LocationConfig {
640 0 : mode,
641 0 : generation: generation.map(|g| g.into().unwrap()),
642 0 : secondary_conf,
643 0 : tenant_conf: config.clone(),
644 0 : shard_number: shard.number.0,
645 0 : shard_count: shard.count.literal(),
646 0 : shard_stripe_size: shard.stripe_size.0,
647 0 : }
648 0 : }
649 :
650 0 : tracing::info!("🔁 Switching origin node {origin_ps} to stale mode",);
651 :
652 : // FIXME: it is incorrect to use self.generation here, we should use the generation
653 : // from the ObservedState of the origin pageserver (it might be older than self.generation)
654 0 : let stale_conf = build_location_config(
655 0 : &self.shard,
656 0 : &self.config,
657 0 : LocationConfigMode::AttachedStale,
658 0 : self.generation,
659 0 : None,
660 0 : );
661 0 : self.location_config(&origin_ps, stale_conf, Some(Duration::from_secs(10)), false)
662 0 : .await?;
663 :
664 0 : let baseline_lsns = Some(self.get_lsns(self.tenant_shard_id, &origin_ps).await?);
665 :
666 : // If we are migrating to a destination that has a secondary location, warm it up first
667 0 : if let Some(destination_conf) = self.observed.locations.get(&dest_ps.get_id()) {
668 0 : if let Some(destination_conf) = &destination_conf.conf {
669 0 : if destination_conf.mode == LocationConfigMode::Secondary {
670 0 : tracing::info!("🔁 Downloading latest layers to destination node {dest_ps}",);
671 0 : self.secondary_download(self.tenant_shard_id, &dest_ps)
672 0 : .await?;
673 0 : }
674 0 : }
675 0 : }
676 :
677 0 : pausable_failpoint!("reconciler-live-migrate-pre-generation-inc");
678 :
679 : // Increment generation before attaching to new pageserver
680 : self.generation = Some(
681 0 : self.persistence
682 0 : .increment_generation(self.tenant_shard_id, dest_ps.get_id())
683 0 : .await?,
684 : );
685 :
686 0 : let dest_conf = build_location_config(
687 0 : &self.shard,
688 0 : &self.config,
689 0 : LocationConfigMode::AttachedMulti,
690 0 : self.generation,
691 0 : None,
692 0 : );
693 0 :
694 0 : tracing::info!("🔁 Attaching to pageserver {dest_ps}");
695 0 : self.location_config(&dest_ps, dest_conf, None, false)
696 0 : .await?;
697 :
698 0 : pausable_failpoint!("reconciler-live-migrate-pre-await-lsn");
699 :
700 0 : if let Some(baseline) = baseline_lsns {
701 0 : tracing::info!("🕑 Waiting for LSN to catch up...");
702 0 : tokio::select! {
703 0 : r = self.await_lsn(self.tenant_shard_id, &dest_ps, baseline) => {r?;}
704 0 : _ = self.cancel.cancelled() => {return Err(ReconcileError::Cancel)}
705 : };
706 0 : }
707 :
708 0 : tracing::info!("🔁 Notifying compute to use pageserver {dest_ps}");
709 :
710 : // During a live migration it is unhelpful to proceed if we couldn't notify compute: if we detach
711 : // the origin without notifying compute, we will render the tenant unavailable.
712 0 : self.compute_notify_blocking(&origin_ps).await?;
713 0 : pausable_failpoint!("reconciler-live-migrate-post-notify");
714 :
715 : // Downgrade the origin to secondary. If the tenant's policy is PlacementPolicy::Attached(0), then
716 : // this location will be deleted in the general case reconciliation that runs after this.
717 0 : let origin_secondary_conf = build_location_config(
718 0 : &self.shard,
719 0 : &self.config,
720 0 : LocationConfigMode::Secondary,
721 0 : None,
722 0 : Some(LocationConfigSecondary { warm: true }),
723 0 : );
724 0 : self.location_config(&origin_ps, origin_secondary_conf.clone(), None, false)
725 0 : .await?;
726 : // TODO: we should also be setting the ObservedState on earlier API calls, in case we fail
727 : // partway through. In fact, all location conf API calls should be in a wrapper that sets
728 : // the observed state to None, then runs, then sets it to what we wrote.
729 0 : self.observed.locations.insert(
730 0 : origin_ps.get_id(),
731 0 : ObservedStateLocation {
732 0 : conf: Some(origin_secondary_conf),
733 0 : },
734 0 : );
735 0 :
736 0 : pausable_failpoint!("reconciler-live-migrate-post-detach");
737 :
738 0 : tracing::info!("🔁 Switching to AttachedSingle mode on node {dest_ps}",);
739 0 : let dest_final_conf = build_location_config(
740 0 : &self.shard,
741 0 : &self.config,
742 0 : LocationConfigMode::AttachedSingle,
743 0 : self.generation,
744 0 : None,
745 0 : );
746 0 : self.location_config(&dest_ps, dest_final_conf.clone(), None, false)
747 0 : .await?;
748 0 : self.observed.locations.insert(
749 0 : dest_ps.get_id(),
750 0 : ObservedStateLocation {
751 0 : conf: Some(dest_final_conf),
752 0 : },
753 0 : );
754 0 :
755 0 : tracing::info!("✅ Migration complete");
756 :
757 0 : Ok(())
758 0 : }
759 :
760 0 : async fn maybe_refresh_observed(&mut self) -> Result<(), ReconcileError> {
761 : // If the attached node has uncertain state, read it from the pageserver before proceeding: this
762 : // is important to avoid spurious generation increments.
763 : //
764 : // We don't need to do this for secondary/detach locations because it's harmless to just PUT their
765 : // location conf, whereas for attached locations it can interrupt clients if we spuriously destroy/recreate
766 : // the `Timeline` object in the pageserver.
767 :
768 0 : let Some(attached_node) = self.intent.attached.as_ref() else {
769 : // Nothing to do
770 0 : return Ok(());
771 : };
772 :
773 0 : if matches!(
774 0 : self.observed.locations.get(&attached_node.get_id()),
775 : Some(ObservedStateLocation { conf: None })
776 : ) {
777 0 : let tenant_shard_id = self.tenant_shard_id;
778 0 : let observed_conf = match attached_node
779 0 : .with_client_retries(
780 0 : |client| async move { client.get_location_config(tenant_shard_id).await },
781 0 : &self.service_config.pageserver_jwt_token,
782 0 : &self.service_config.ssl_ca_cert,
783 0 : 1,
784 0 : 1,
785 0 : Duration::from_secs(5),
786 0 : &self.cancel,
787 0 : )
788 0 : .await
789 : {
790 0 : Some(Ok(observed)) => Some(observed),
791 0 : Some(Err(mgmt_api::Error::ApiError(status, _msg)))
792 0 : if status == StatusCode::NOT_FOUND =>
793 0 : {
794 0 : None
795 : }
796 0 : Some(Err(e)) => return Err(e.into()),
797 0 : None => return Err(ReconcileError::Cancel),
798 : };
799 0 : tracing::info!("Scanned location configuration on {attached_node}: {observed_conf:?}");
800 0 : match observed_conf {
801 0 : Some(conf) => {
802 0 : // Pageserver returned a state: update it in observed. This may still be an indeterminate (None) state,
803 0 : // if internally the pageserver's TenantSlot was being mutated (e.g. some long running API call is still running)
804 0 : self.observed
805 0 : .locations
806 0 : .insert(attached_node.get_id(), ObservedStateLocation { conf });
807 0 : }
808 0 : None => {
809 0 : // Pageserver returned 404: we have confirmation that there is no state for this shard on that pageserver.
810 0 : self.observed.locations.remove(&attached_node.get_id());
811 0 : }
812 : }
813 0 : }
814 :
815 0 : Ok(())
816 0 : }
817 :
818 : /// Reconciling a tenant makes API calls to pageservers until the observed state
819 : /// matches the intended state.
820 : ///
821 : /// First we apply special case handling (e.g. for live migrations), and then a
822 : /// general case reconciliation where we walk through the intent by pageserver
823 : /// and call out to the pageserver to apply the desired state.
824 : ///
825 : /// An Ok(()) result indicates that we successfully attached the tenant, but _not_ that
826 : /// all locations for the tenant are in the expected state. When nodes that are to be detached
827 : /// or configured as secondary are unavailable, we may return Ok(()) but leave the shard in a
828 : /// state where it still requires later reconciliation.
829 0 : pub(crate) async fn reconcile(&mut self) -> Result<(), ReconcileError> {
830 0 : // Prepare: if we have uncertain `observed` state for our would-be attachement location, then refresh it
831 0 : self.maybe_refresh_observed().await?;
832 :
833 : // Special case: live migration
834 0 : self.maybe_live_migrate().await?;
835 :
836 : // If the attached pageserver is not attached, do so now.
837 0 : if let Some(node) = self.intent.attached.as_ref() {
838 : // If we are in an attached policy, then generation must have been set (null generations
839 : // are only present when a tenant is initially loaded with a secondary policy)
840 0 : debug_assert!(self.generation.is_some());
841 0 : let Some(generation) = self.generation else {
842 0 : return Err(ReconcileError::Other(anyhow::anyhow!(
843 0 : "Attempted to attach with NULL generation"
844 0 : )));
845 : };
846 :
847 0 : let mut wanted_conf = attached_location_conf(
848 0 : generation,
849 0 : &self.shard,
850 0 : &self.config,
851 0 : &self.placement_policy,
852 0 : );
853 0 : match self.observed.locations.get(&node.get_id()) {
854 0 : Some(conf) if conf.conf.as_ref() == Some(&wanted_conf) => {
855 0 : // Nothing to do
856 0 : tracing::info!(node_id=%node.get_id(), "Observed configuration already correct.")
857 : }
858 0 : observed => {
859 : // In all cases other than a matching observed configuration, we will
860 : // reconcile this location. This includes locations with different configurations, as well
861 : // as locations with unknown (None) observed state.
862 :
863 : // Incrementing generation is the safe general case, but is inefficient for changes that only
864 : // modify some details (e.g. the tenant's config).
865 0 : let increment_generation = match observed {
866 0 : None => true,
867 0 : Some(ObservedStateLocation { conf: None }) => true,
868 : Some(ObservedStateLocation {
869 0 : conf: Some(observed),
870 0 : }) => {
871 0 : let generations_match = observed.generation == wanted_conf.generation;
872 0 :
873 0 : // We may skip incrementing the generation if the location is already in the expected mode and
874 0 : // generation. In principle it would also be safe to skip from certain other modes (e.g. AttachedStale),
875 0 : // but such states are handled inside `live_migrate`, and if we see that state here we're cleaning up
876 0 : // after a restart/crash, so fall back to the universally safe path of incrementing generation.
877 0 : !generations_match || (observed.mode != wanted_conf.mode)
878 : }
879 : };
880 :
881 0 : if increment_generation {
882 0 : pausable_failpoint!("reconciler-pre-increment-generation");
883 :
884 0 : let generation = self
885 0 : .persistence
886 0 : .increment_generation(self.tenant_shard_id, node.get_id())
887 0 : .await?;
888 0 : self.generation = Some(generation);
889 0 : wanted_conf.generation = generation.into();
890 0 : }
891 :
892 0 : let diff = match observed {
893 : Some(ObservedStateLocation {
894 0 : conf: Some(observed),
895 0 : }) => {
896 0 : let diff = JsonDiff::diff(
897 0 : &serde_json::to_value(observed.clone()).unwrap(),
898 0 : &serde_json::to_value(wanted_conf.clone()).unwrap(),
899 0 : false,
900 0 : );
901 :
902 0 : if let Some(json_diff) = diff.diff {
903 0 : serde_json::to_string(&json_diff).unwrap_or("diff err".to_string())
904 : } else {
905 0 : "unknown".to_string()
906 : }
907 : }
908 0 : _ => "full".to_string(),
909 : };
910 :
911 0 : tracing::info!(node_id=%node.get_id(), "Observed configuration requires update: {diff}");
912 :
913 : // Because `node` comes from a ref to &self, clone it before calling into a &mut self
914 : // function: this could be avoided by refactoring the state mutated by location_config into
915 : // a separate type to Self.
916 0 : let node = node.clone();
917 0 :
918 0 : // Use lazy=true, because we may run many of Self concurrently, and do not want to
919 0 : // overload the pageserver with logical size calculations.
920 0 : self.location_config(&node, wanted_conf, None, true).await?;
921 0 : self.compute_notify().await?;
922 : }
923 : }
924 0 : }
925 :
926 : // Configure secondary locations: if these were previously attached this
927 : // implicitly downgrades them from attached to secondary.
928 0 : let mut changes = Vec::new();
929 0 : for node in &self.intent.secondary {
930 0 : let wanted_conf = secondary_location_conf(&self.shard, &self.config);
931 0 : match self.observed.locations.get(&node.get_id()) {
932 0 : Some(conf) if conf.conf.as_ref() == Some(&wanted_conf) => {
933 0 : // Nothing to do
934 0 : tracing::info!(node_id=%node.get_id(), "Observed configuration already correct.")
935 : }
936 : _ => {
937 : // Only try and configure secondary locations on nodes that are available. This
938 : // allows the reconciler to "succeed" while some secondaries are offline (e.g. after
939 : // a node failure, where the failed node will have a secondary intent)
940 0 : if node.is_available() {
941 0 : tracing::info!(node_id=%node.get_id(), "Observed configuration requires update.");
942 0 : changes.push((node.clone(), wanted_conf))
943 : } else {
944 0 : tracing::info!(node_id=%node.get_id(), "Skipping configuration as secondary, node is unavailable");
945 0 : self.observed
946 0 : .locations
947 0 : .insert(node.get_id(), ObservedStateLocation { conf: None });
948 : }
949 : }
950 : }
951 : }
952 :
953 : // Detach any extraneous pageservers that are no longer referenced
954 : // by our intent.
955 0 : for node in &self.detach {
956 0 : changes.push((
957 0 : node.clone(),
958 0 : LocationConfig {
959 0 : mode: LocationConfigMode::Detached,
960 0 : generation: None,
961 0 : secondary_conf: None,
962 0 : shard_number: self.shard.number.0,
963 0 : shard_count: self.shard.count.literal(),
964 0 : shard_stripe_size: self.shard.stripe_size.0,
965 0 : tenant_conf: self.config.clone(),
966 0 : },
967 0 : ));
968 0 : }
969 :
970 0 : for (node, conf) in changes {
971 0 : if self.cancel.is_cancelled() {
972 0 : return Err(ReconcileError::Cancel);
973 0 : }
974 0 : // We only try to configure secondary locations if the node is available. This does
975 0 : // not stop us succeeding with the reconcile, because our core goal is to make the
976 0 : // shard _available_ (the attached location), and configuring secondary locations
977 0 : // can be done lazily when the node becomes available (via background reconciliation).
978 0 : if node.is_available() {
979 0 : self.location_config(&node, conf, None, false).await?;
980 : } else {
981 : // If the node is unavailable, we skip and consider the reconciliation successful: this
982 : // is a common case where a pageserver is marked unavailable: we demote a location on
983 : // that unavailable pageserver to secondary.
984 0 : tracing::info!("Skipping configuring secondary location {node}, it is unavailable");
985 0 : self.observed
986 0 : .locations
987 0 : .insert(node.get_id(), ObservedStateLocation { conf: None });
988 : }
989 : }
990 :
991 : // The condition below identifies a detach. We must have no attached intent and
992 : // must have been attached to something previously. Pass this information to
993 : // the [`ComputeHook`] such that it can update its tenant-wide state.
994 0 : if self.intent.attached.is_none() && !self.detach.is_empty() {
995 0 : // TODO: Consider notifying control plane about detaches. This would avoid situations
996 0 : // where the compute tries to start-up with a stale set of pageservers.
997 0 : self.compute_hook
998 0 : .handle_detach(self.tenant_shard_id, self.shard.stripe_size);
999 0 : }
1000 :
1001 0 : pausable_failpoint!("reconciler-epilogue");
1002 :
1003 0 : Ok(())
1004 0 : }
1005 :
1006 0 : pub(crate) async fn compute_notify(&mut self) -> Result<(), NotifyError> {
1007 : // Whenever a particular Reconciler emits a notification, it is always notifying for the intended
1008 : // destination.
1009 0 : if let Some(node) = &self.intent.attached {
1010 0 : let result = self
1011 0 : .compute_hook
1012 0 : .notify(
1013 0 : compute_hook::ShardUpdate {
1014 0 : tenant_shard_id: self.tenant_shard_id,
1015 0 : node_id: node.get_id(),
1016 0 : stripe_size: self.shard.stripe_size,
1017 0 : preferred_az: self.preferred_az.as_ref().map(Cow::Borrowed),
1018 0 : },
1019 0 : &self.cancel,
1020 0 : )
1021 0 : .await;
1022 0 : if let Err(e) = &result {
1023 : // Set this flag so that in our ReconcileResult we will set the flag on the shard that it
1024 : // needs to retry at some point.
1025 0 : self.compute_notify_failure = true;
1026 :
1027 : // It is up to the caller whether they want to drop out on this error, but they don't have to:
1028 : // in general we should avoid letting unavailability of the cloud control plane stop us from
1029 : // making progress.
1030 0 : match e {
1031 0 : // 404s from cplane during tenant creation are expected.
1032 0 : // Cplane only persists the shards to the database after
1033 0 : // creating the tenant and the timeline. If we notify before
1034 0 : // that, we'll get a 404.
1035 0 : //
1036 0 : // This is fine because tenant creations happen via /location_config
1037 0 : // and that returns the list of locations in the response. Hence, we
1038 0 : // silence the error and return Ok(()) here. Reconciliation will still
1039 0 : // be retried because we set [`Reconciler::compute_notify_failure`] above.
1040 0 : NotifyError::Unexpected(hyper::StatusCode::NOT_FOUND)
1041 0 : if self.reconciler_config.tenant_creation_hint() =>
1042 0 : {
1043 0 : return Ok(());
1044 : }
1045 0 : NotifyError::ShuttingDown => {}
1046 : _ => {
1047 0 : tracing::warn!(
1048 0 : "Failed to notify compute of attached pageserver {node}: {e}"
1049 : );
1050 : }
1051 : }
1052 0 : }
1053 0 : result
1054 : } else {
1055 0 : Ok(())
1056 : }
1057 0 : }
1058 :
1059 : /// Compare the observed state snapshot from when the reconcile was created
1060 : /// with the final observed state in order to generate observed state deltas.
1061 0 : pub(crate) fn observed_deltas(&self) -> Vec<ObservedStateDelta> {
1062 0 : let mut deltas = Vec::default();
1063 :
1064 0 : for (node_id, location) in &self.observed.locations {
1065 0 : let previous_location = self.original_observed.locations.get(node_id);
1066 0 : let do_upsert = match previous_location {
1067 : // Location config changed for node
1068 0 : Some(prev) if location.conf != prev.conf => true,
1069 : // New location config for node
1070 0 : None => true,
1071 : // Location config has not changed for node
1072 0 : _ => false,
1073 : };
1074 :
1075 0 : if do_upsert {
1076 0 : deltas.push(ObservedStateDelta::Upsert(Box::new((
1077 0 : *node_id,
1078 0 : location.clone(),
1079 0 : ))));
1080 0 : }
1081 : }
1082 :
1083 0 : for node_id in self.original_observed.locations.keys() {
1084 0 : if !self.observed.locations.contains_key(node_id) {
1085 0 : deltas.push(ObservedStateDelta::Delete(*node_id));
1086 0 : }
1087 : }
1088 :
1089 0 : deltas
1090 0 : }
1091 :
1092 : /// Keep trying to notify the compute indefinitely, only dropping out if:
1093 : /// - the node `origin` becomes unavailable -> Ok(())
1094 : /// - the node `origin` no longer has our tenant shard attached -> Ok(())
1095 : /// - our cancellation token fires -> Err(ReconcileError::Cancelled)
1096 : ///
1097 : /// This is used during live migration, where we do not wish to detach
1098 : /// an origin location until the compute definitely knows about the new
1099 : /// location.
1100 : ///
1101 : /// In cases where the origin node becomes unavailable, we return success, indicating
1102 : /// to the caller that they should continue irrespective of whether the compute was notified,
1103 : /// because the origin node is unusable anyway. Notification will be retried later via the
1104 : /// [`Self::compute_notify_failure`] flag.
1105 0 : async fn compute_notify_blocking(&mut self, origin: &Node) -> Result<(), ReconcileError> {
1106 0 : let mut notify_attempts = 0;
1107 0 : while let Err(e) = self.compute_notify().await {
1108 0 : match e {
1109 0 : NotifyError::Fatal(_) => return Err(ReconcileError::Notify(e)),
1110 0 : NotifyError::ShuttingDown => return Err(ReconcileError::Cancel),
1111 : _ => {
1112 0 : tracing::warn!(
1113 0 : "Live migration blocked by compute notification error, retrying: {e}"
1114 : );
1115 : }
1116 : }
1117 :
1118 : // Did the origin pageserver become unavailable?
1119 0 : if !origin.is_available() {
1120 0 : tracing::info!("Giving up on compute notification because {origin} is unavailable");
1121 0 : break;
1122 0 : }
1123 0 :
1124 0 : // Does the origin pageserver still host the shard we are interested in? We should only
1125 0 : // continue waiting for compute notification to be acked if the old location is still usable.
1126 0 : let tenant_shard_id = self.tenant_shard_id;
1127 0 : match origin
1128 0 : .with_client_retries(
1129 0 : |client| async move { client.get_location_config(tenant_shard_id).await },
1130 0 : &self.service_config.pageserver_jwt_token,
1131 0 : &self.service_config.ssl_ca_cert,
1132 0 : 1,
1133 0 : 3,
1134 0 : Duration::from_secs(5),
1135 0 : &self.cancel,
1136 0 : )
1137 0 : .await
1138 : {
1139 0 : Some(Ok(Some(location_conf))) => {
1140 0 : if matches!(
1141 0 : location_conf.mode,
1142 : LocationConfigMode::AttachedMulti
1143 : | LocationConfigMode::AttachedSingle
1144 : | LocationConfigMode::AttachedStale
1145 : ) {
1146 0 : tracing::debug!(
1147 0 : "Still attached to {origin}, will wait & retry compute notification"
1148 : );
1149 : } else {
1150 0 : tracing::info!(
1151 0 : "Giving up on compute notification because {origin} is in state {:?}",
1152 : location_conf.mode
1153 : );
1154 0 : return Ok(());
1155 : }
1156 : // Fall through
1157 : }
1158 : Some(Ok(None)) => {
1159 0 : tracing::info!(
1160 0 : "No longer attached to {origin}, giving up on compute notification"
1161 : );
1162 0 : return Ok(());
1163 : }
1164 0 : Some(Err(e)) => {
1165 0 : match e {
1166 : mgmt_api::Error::Cancelled => {
1167 0 : tracing::info!(
1168 0 : "Giving up on compute notification because {origin} is unavailable"
1169 : );
1170 0 : return Ok(());
1171 : }
1172 : mgmt_api::Error::ApiError(StatusCode::NOT_FOUND, _) => {
1173 0 : tracing::info!(
1174 0 : "No longer attached to {origin}, giving up on compute notification"
1175 : );
1176 0 : return Ok(());
1177 : }
1178 0 : e => {
1179 0 : // Other API errors are unexpected here.
1180 0 : tracing::warn!("Unexpected error checking location on {origin}: {e}");
1181 :
1182 : // Fall through, we will retry compute notification.
1183 : }
1184 : }
1185 : }
1186 0 : None => return Err(ReconcileError::Cancel),
1187 : };
1188 :
1189 0 : exponential_backoff(
1190 0 : notify_attempts,
1191 0 : // Generous waits: control plane operations which might be blocking us usually complete on the order
1192 0 : // of hundreds to thousands of milliseconds, so no point busy polling.
1193 0 : 1.0,
1194 0 : 10.0,
1195 0 : &self.cancel,
1196 0 : )
1197 0 : .await;
1198 0 : notify_attempts += 1;
1199 : }
1200 :
1201 0 : Ok(())
1202 0 : }
1203 : }
1204 :
1205 : /// We tweak the externally-set TenantConfig while configuring
1206 : /// locations, using our awareness of whether secondary locations
1207 : /// are in use to automatically enable/disable heatmap uploads.
1208 0 : fn ha_aware_config(config: &TenantConfig, has_secondaries: bool) -> TenantConfig {
1209 0 : let mut config = config.clone();
1210 0 : if has_secondaries {
1211 0 : if config.heatmap_period.is_none() {
1212 0 : config.heatmap_period = Some(DEFAULT_HEATMAP_PERIOD);
1213 0 : }
1214 0 : } else {
1215 0 : config.heatmap_period = None;
1216 0 : }
1217 0 : config
1218 0 : }
1219 :
1220 0 : pub(crate) fn attached_location_conf(
1221 0 : generation: Generation,
1222 0 : shard: &ShardIdentity,
1223 0 : config: &TenantConfig,
1224 0 : policy: &PlacementPolicy,
1225 0 : ) -> LocationConfig {
1226 0 : let has_secondaries = match policy {
1227 : PlacementPolicy::Attached(0) | PlacementPolicy::Detached | PlacementPolicy::Secondary => {
1228 0 : false
1229 : }
1230 0 : PlacementPolicy::Attached(_) => true,
1231 : };
1232 :
1233 0 : LocationConfig {
1234 0 : mode: LocationConfigMode::AttachedSingle,
1235 0 : generation: generation.into(),
1236 0 : secondary_conf: None,
1237 0 : shard_number: shard.number.0,
1238 0 : shard_count: shard.count.literal(),
1239 0 : shard_stripe_size: shard.stripe_size.0,
1240 0 : tenant_conf: ha_aware_config(config, has_secondaries),
1241 0 : }
1242 0 : }
1243 :
1244 0 : pub(crate) fn secondary_location_conf(
1245 0 : shard: &ShardIdentity,
1246 0 : config: &TenantConfig,
1247 0 : ) -> LocationConfig {
1248 0 : LocationConfig {
1249 0 : mode: LocationConfigMode::Secondary,
1250 0 : generation: None,
1251 0 : secondary_conf: Some(LocationConfigSecondary { warm: true }),
1252 0 : shard_number: shard.number.0,
1253 0 : shard_count: shard.count.literal(),
1254 0 : shard_stripe_size: shard.stripe_size.0,
1255 0 : tenant_conf: ha_aware_config(config, true),
1256 0 : }
1257 0 : }
|
