Line data Source code
1 : //! Functionality for finding and purging garbage, as in "garbage collection".
2 : //!
3 : //! Garbage means S3 objects which are either not referenced by any metadata,
4 : //! or are referenced by a control plane tenant/timeline in a deleted state.
5 :
6 : use std::{
7 : collections::{HashMap, HashSet},
8 : sync::Arc,
9 : time::Duration,
10 : };
11 :
12 : use anyhow::Context;
13 : use futures_util::TryStreamExt;
14 : use pageserver_api::shard::TenantShardId;
15 : use remote_storage::{GenericRemoteStorage, ListingMode, ListingObject, RemotePath};
16 : use serde::{Deserialize, Serialize};
17 : use tokio_stream::StreamExt;
18 : use tokio_util::sync::CancellationToken;
19 : use utils::{backoff, id::TenantId};
20 :
21 : use crate::{
22 : cloud_admin_api::{CloudAdminApiClient, MaybeDeleted, ProjectData},
23 : init_remote, list_objects_with_retries,
24 : metadata_stream::{stream_tenant_timelines, stream_tenants},
25 : BucketConfig, ConsoleConfig, NodeKind, TenantShardTimelineId, TraversingDepth, MAX_RETRIES,
26 : };
27 :
28 0 : #[derive(Serialize, Deserialize, Debug)]
29 : enum GarbageReason {
30 : DeletedInConsole,
31 : MissingInConsole,
32 :
33 : // The remaining data relates to a known deletion issue, and we're sure that purging this
34 : // will not delete any real data, for example https://github.com/neondatabase/neon/pull/7928 where
35 : // there is nothing in a tenant path apart from a heatmap file.
36 : KnownBug,
37 : }
38 :
39 0 : #[derive(Serialize, Deserialize, Debug)]
40 : enum GarbageEntity {
41 : Tenant(TenantShardId),
42 : Timeline(TenantShardTimelineId),
43 : }
44 :
45 0 : #[derive(Serialize, Deserialize, Debug)]
46 : struct GarbageItem {
47 : entity: GarbageEntity,
48 : reason: GarbageReason,
49 : }
50 :
51 0 : #[derive(Serialize, Deserialize, Debug)]
52 : pub struct GarbageList {
53 : /// Remember what NodeKind we were finding garbage for, so that we can
54 : /// purge the list without re-stating it.
55 : node_kind: NodeKind,
56 :
57 : /// Embed the identity of the bucket, so that we do not risk executing
58 : /// the wrong list against the wrong bucket, and so that the user does not have
59 : /// to re-state the bucket details when purging.
60 : bucket_config: BucketConfig,
61 :
62 : items: Vec<GarbageItem>,
63 :
64 : /// Advisory information to enable consumers to do a validation that if we
65 : /// see garbage, we saw some active tenants too. This protects against classes of bugs
66 : /// in the scrubber that might otherwise generate a "deleted all" result.
67 : active_tenant_count: usize,
68 : active_timeline_count: usize,
69 : }
70 :
71 : impl GarbageList {
72 0 : fn new(node_kind: NodeKind, bucket_config: BucketConfig) -> Self {
73 0 : Self {
74 0 : items: Vec::new(),
75 0 : active_tenant_count: 0,
76 0 : active_timeline_count: 0,
77 0 : node_kind,
78 0 : bucket_config,
79 0 : }
80 0 : }
81 :
82 : /// If an entity has been identified as requiring purge due to a known bug, e.g.
83 : /// a particular type of object left behind after an incomplete deletion.
84 0 : fn append_buggy(&mut self, entity: GarbageEntity) {
85 0 : self.items.push(GarbageItem {
86 0 : entity,
87 0 : reason: GarbageReason::KnownBug,
88 0 : });
89 0 : }
90 :
91 : /// Return true if appended, false if not. False means the result was not garbage.
92 0 : fn maybe_append<T>(&mut self, entity: GarbageEntity, result: Option<T>) -> bool
93 0 : where
94 0 : T: MaybeDeleted,
95 0 : {
96 0 : match result {
97 0 : Some(result_item) if result_item.is_deleted() => {
98 0 : self.items.push(GarbageItem {
99 0 : entity,
100 0 : reason: GarbageReason::DeletedInConsole,
101 0 : });
102 0 : true
103 : }
104 0 : Some(_) => false,
105 : None => {
106 0 : self.items.push(GarbageItem {
107 0 : entity,
108 0 : reason: GarbageReason::MissingInConsole,
109 0 : });
110 0 : true
111 : }
112 : }
113 0 : }
114 : }
115 :
116 0 : pub async fn find_garbage(
117 0 : bucket_config: BucketConfig,
118 0 : console_config: ConsoleConfig,
119 0 : depth: TraversingDepth,
120 0 : node_kind: NodeKind,
121 0 : output_path: String,
122 0 : ) -> anyhow::Result<()> {
123 0 : let garbage = find_garbage_inner(bucket_config, console_config, depth, node_kind).await?;
124 0 : let serialized = serde_json::to_vec_pretty(&garbage)?;
125 :
126 0 : tokio::fs::write(&output_path, &serialized).await?;
127 :
128 0 : tracing::info!("Wrote garbage report to {output_path}");
129 :
130 0 : Ok(())
131 0 : }
132 :
133 : // How many concurrent S3 operations to issue (approximately): this is the concurrency
134 : // for things like listing the timelines within tenant prefixes.
135 : const S3_CONCURRENCY: usize = 32;
136 :
137 : // How many concurrent API requests to make to the console API.
138 : //
139 : // Be careful increasing this; roughly we shouldn't have more than ~100 rps. It
140 : // would be better to implement real rsp limiter.
141 : const CONSOLE_CONCURRENCY: usize = 16;
142 :
143 : struct ConsoleCache {
144 : /// Set of tenants found in the control plane API
145 : projects: HashMap<TenantId, ProjectData>,
146 : /// Set of tenants for which the control plane API returned 404
147 : not_found: HashSet<TenantId>,
148 : }
149 :
150 0 : async fn find_garbage_inner(
151 0 : bucket_config: BucketConfig,
152 0 : console_config: ConsoleConfig,
153 0 : depth: TraversingDepth,
154 0 : node_kind: NodeKind,
155 0 : ) -> anyhow::Result<GarbageList> {
156 : // Construct clients for S3 and for Console API
157 0 : let (remote_client, target) = init_remote(bucket_config.clone(), node_kind).await?;
158 0 : let cloud_admin_api_client = Arc::new(CloudAdminApiClient::new(console_config));
159 :
160 : // Build a set of console-known tenants, for quickly eliminating known-active tenants without having
161 : // to issue O(N) console API requests.
162 0 : let console_projects: HashMap<TenantId, ProjectData> = cloud_admin_api_client
163 0 : // FIXME: we can't just assume that all console's region ids are aws-<something>. This hack
164 0 : // will go away when we are talking to Control Plane APIs, which are per-region.
165 0 : .list_projects(format!("aws-{}", bucket_config.region))
166 0 : .await?
167 0 : .into_iter()
168 0 : .map(|t| (t.tenant, t))
169 0 : .collect();
170 0 : tracing::info!(
171 0 : "Loaded {} console projects tenant IDs",
172 0 : console_projects.len()
173 : );
174 :
175 : // Because many tenant shards may look up the same TenantId, we maintain a cache.
176 0 : let console_cache = Arc::new(std::sync::Mutex::new(ConsoleCache {
177 0 : projects: console_projects,
178 0 : not_found: HashSet::new(),
179 0 : }));
180 0 :
181 0 : // Enumerate Tenants in S3, and check if each one exists in Console
182 0 : tracing::info!("Finding all tenants in bucket {}...", bucket_config.bucket);
183 0 : let tenants = stream_tenants(&remote_client, &target);
184 0 : let tenants_checked = tenants.map_ok(|t| {
185 0 : let api_client = cloud_admin_api_client.clone();
186 0 : let console_cache = console_cache.clone();
187 0 : async move {
188 : // Check cache before issuing API call
189 0 : let project_data = {
190 0 : let cache = console_cache.lock().unwrap();
191 0 : let result = cache.projects.get(&t.tenant_id).cloned();
192 0 : if result.is_none() && cache.not_found.contains(&t.tenant_id) {
193 0 : return Ok((t, None));
194 0 : }
195 0 : result
196 0 : };
197 0 :
198 0 : match project_data {
199 0 : Some(project_data) => Ok((t, Some(project_data.clone()))),
200 : None => {
201 0 : let project_data = api_client
202 0 : .find_tenant_project(t.tenant_id)
203 0 : .await
204 0 : .map_err(|e| anyhow::anyhow!(e));
205 0 :
206 0 : // Populate cache with result of API call
207 0 : {
208 0 : let mut cache = console_cache.lock().unwrap();
209 0 : if let Ok(Some(project_data)) = &project_data {
210 0 : cache.projects.insert(t.tenant_id, project_data.clone());
211 0 : } else if let Ok(None) = &project_data {
212 0 : cache.not_found.insert(t.tenant_id);
213 0 : }
214 : }
215 :
216 0 : project_data.map(|r| (t, r))
217 : }
218 : }
219 0 : }
220 0 : });
221 0 : let mut tenants_checked =
222 0 : std::pin::pin!(tenants_checked.try_buffer_unordered(CONSOLE_CONCURRENCY));
223 0 :
224 0 : // Process the results of Tenant checks. If a Tenant is garbage, it goes into
225 0 : // the `GarbageList`. Else it goes into `active_tenants` for more detailed timeline
226 0 : // checks if they are enabled by the `depth` parameter.
227 0 : let mut garbage = GarbageList::new(node_kind, bucket_config);
228 0 : let mut active_tenants: Vec<TenantShardId> = vec![];
229 0 : let mut counter = 0;
230 0 : while let Some(result) = tenants_checked.next().await {
231 0 : let (tenant_shard_id, console_result) = result?;
232 :
233 : // Paranoia check
234 0 : if let Some(project) = &console_result {
235 0 : assert!(project.tenant == tenant_shard_id.tenant_id);
236 0 : }
237 :
238 : // Special case: If it's missing in console, check for known bugs that would enable us to conclusively
239 : // identify it as purge-able anyway
240 0 : if console_result.is_none() {
241 0 : let timelines = stream_tenant_timelines(&remote_client, &target, tenant_shard_id)
242 0 : .await?
243 0 : .collect::<Vec<_>>()
244 0 : .await;
245 0 : if timelines.is_empty() {
246 : // No timelines, but a heatmap: the deletion bug where we deleted everything but heatmaps
247 0 : let tenant_objects = list_objects_with_retries(
248 0 : &remote_client,
249 0 : ListingMode::WithDelimiter,
250 0 : &target.tenant_root(&tenant_shard_id),
251 0 : )
252 0 : .await?;
253 0 : if let Some(object) = tenant_objects.keys.first() {
254 0 : if object.key.get_path().as_str().ends_with("heatmap-v1.json") {
255 0 : tracing::info!("Tenant {tenant_shard_id}: is missing in console and is only a heatmap (known historic deletion bug)");
256 0 : garbage.append_buggy(GarbageEntity::Tenant(tenant_shard_id));
257 0 : continue;
258 : } else {
259 0 : tracing::info!("Tenant {tenant_shard_id} is missing in console and contains one object: {}", object.key);
260 : }
261 : } else {
262 0 : tracing::info!("Tenant {tenant_shard_id} is missing in console appears to have been deleted while we ran");
263 : }
264 : } else {
265 : // A console-unknown tenant with timelines: check if these timelines only contain initdb.tar.zst, from the initial
266 : // rollout of WAL DR in which we never deleted these.
267 0 : let mut any_non_initdb = false;
268 :
269 0 : for timeline_r in timelines {
270 0 : let timeline = timeline_r?;
271 0 : let timeline_objects = list_objects_with_retries(
272 0 : &remote_client,
273 0 : ListingMode::WithDelimiter,
274 0 : &target.timeline_root(&timeline),
275 0 : )
276 0 : .await?;
277 0 : if !timeline_objects.prefixes.is_empty() {
278 0 : // Sub-paths? Unexpected
279 0 : any_non_initdb = true;
280 0 : } else {
281 0 : let object = timeline_objects.keys.first().unwrap();
282 0 : if object.key.get_path().as_str().ends_with("initdb.tar.zst") {
283 0 : tracing::info!("Timeline {timeline} contains only initdb.tar.zst");
284 0 : } else {
285 0 : any_non_initdb = true;
286 0 : }
287 : }
288 : }
289 :
290 0 : if any_non_initdb {
291 0 : tracing::info!("Tenant {tenant_shard_id}: is missing in console and contains timelines, one or more of which are more than just initdb");
292 : } else {
293 0 : tracing::info!("Tenant {tenant_shard_id}: is missing in console and contains only timelines that only contain initdb");
294 0 : garbage.append_buggy(GarbageEntity::Tenant(tenant_shard_id));
295 0 : continue;
296 : }
297 : }
298 0 : }
299 :
300 0 : if garbage.maybe_append(GarbageEntity::Tenant(tenant_shard_id), console_result) {
301 0 : tracing::debug!("Tenant {tenant_shard_id} is garbage");
302 : } else {
303 0 : tracing::debug!("Tenant {tenant_shard_id} is active");
304 0 : active_tenants.push(tenant_shard_id);
305 0 : garbage.active_tenant_count = active_tenants.len();
306 : }
307 :
308 0 : counter += 1;
309 0 : if counter % 1000 == 0 {
310 0 : tracing::info!(
311 0 : "Progress: {counter} tenants checked, {} active, {} garbage",
312 0 : active_tenants.len(),
313 0 : garbage.items.len()
314 : );
315 0 : }
316 : }
317 :
318 0 : tracing::info!(
319 0 : "Found {}/{} garbage tenants",
320 0 : garbage.items.len(),
321 0 : garbage.items.len() + active_tenants.len()
322 : );
323 :
324 : // If we are only checking tenant-deep, we are done. Otherwise we must
325 : // proceed to check the individual timelines of the active tenants.
326 0 : if depth == TraversingDepth::Tenant {
327 0 : return Ok(garbage);
328 0 : }
329 0 :
330 0 : tracing::info!(
331 0 : "Checking timelines for {} active tenants",
332 0 : active_tenants.len(),
333 : );
334 :
335 : // Construct a stream of all timelines within active tenants
336 0 : let active_tenants = tokio_stream::iter(active_tenants.iter().map(Ok));
337 0 : let timelines = active_tenants.map_ok(|t| stream_tenant_timelines(&remote_client, &target, *t));
338 0 : let timelines = timelines.try_buffer_unordered(S3_CONCURRENCY);
339 0 : let timelines = timelines.try_flatten();
340 0 :
341 0 : // For all timelines within active tenants, call into console API to check their existence
342 0 : let timelines_checked = timelines.map_ok(|ttid| {
343 0 : let api_client = cloud_admin_api_client.clone();
344 0 : async move {
345 0 : api_client
346 0 : .find_timeline_branch(ttid.tenant_shard_id.tenant_id, ttid.timeline_id)
347 0 : .await
348 0 : .map_err(|e| anyhow::anyhow!(e))
349 0 : .map(|r| (ttid, r))
350 0 : }
351 0 : });
352 0 : let mut timelines_checked =
353 0 : std::pin::pin!(timelines_checked.try_buffer_unordered(CONSOLE_CONCURRENCY));
354 0 :
355 0 : // Update the GarbageList with any timelines which appear not to exist.
356 0 : let mut active_timelines: Vec<TenantShardTimelineId> = vec![];
357 0 : while let Some(result) = timelines_checked.next().await {
358 0 : let (ttid, console_result) = result?;
359 0 : if garbage.maybe_append(GarbageEntity::Timeline(ttid), console_result) {
360 0 : tracing::debug!("Timeline {ttid} is garbage");
361 : } else {
362 0 : tracing::debug!("Timeline {ttid} is active");
363 0 : active_timelines.push(ttid);
364 0 : garbage.active_timeline_count = active_timelines.len();
365 : }
366 : }
367 :
368 0 : let num_garbage_timelines = garbage
369 0 : .items
370 0 : .iter()
371 0 : .filter(|g| matches!(g.entity, GarbageEntity::Timeline(_)))
372 0 : .count();
373 0 : tracing::info!(
374 0 : "Found {}/{} garbage timelines in active tenants",
375 0 : num_garbage_timelines,
376 0 : active_timelines.len(),
377 : );
378 :
379 0 : Ok(garbage)
380 0 : }
381 :
382 0 : #[derive(clap::ValueEnum, Debug, Clone)]
383 : pub enum PurgeMode {
384 : /// The safest mode: only delete tenants that were explicitly reported as deleted
385 : /// by Console API.
386 : DeletedOnly,
387 :
388 : /// Delete all garbage tenants, including those which are only presumed to be deleted,
389 : /// because the Console API could not find them.
390 : DeletedAndMissing,
391 : }
392 :
393 : impl std::fmt::Display for PurgeMode {
394 0 : fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
395 0 : match self {
396 0 : PurgeMode::DeletedOnly => write!(f, "deleted-only"),
397 0 : PurgeMode::DeletedAndMissing => write!(f, "deleted-and-missing"),
398 : }
399 0 : }
400 : }
401 :
402 0 : pub async fn get_tenant_objects(
403 0 : s3_client: &GenericRemoteStorage,
404 0 : tenant_shard_id: TenantShardId,
405 0 : ) -> anyhow::Result<Vec<ListingObject>> {
406 0 : tracing::debug!("Listing objects in tenant {tenant_shard_id}");
407 0 : let tenant_root = super::remote_tenant_path(&tenant_shard_id);
408 0 :
409 0 : // TODO: apply extra validation based on object modification time. Don't purge
410 0 : // tenants where any timeline's index_part.json has been touched recently.
411 0 :
412 0 : let cancel = CancellationToken::new();
413 0 : let list = backoff::retry(
414 0 : || s3_client.list(Some(&tenant_root), ListingMode::NoDelimiter, None, &cancel),
415 0 : |_| false,
416 0 : 3,
417 0 : MAX_RETRIES as u32,
418 0 : "get_tenant_objects",
419 0 : &cancel,
420 0 : )
421 0 : .await
422 0 : .expect("dummy cancellation token")?;
423 0 : Ok(list.keys)
424 0 : }
425 :
426 0 : pub async fn get_timeline_objects(
427 0 : s3_client: &GenericRemoteStorage,
428 0 : ttid: TenantShardTimelineId,
429 0 : ) -> anyhow::Result<Vec<ListingObject>> {
430 0 : tracing::debug!("Listing objects in timeline {ttid}");
431 0 : let timeline_root = super::remote_timeline_path_id(&ttid);
432 0 :
433 0 : let cancel = CancellationToken::new();
434 0 : let list = backoff::retry(
435 0 : || {
436 0 : s3_client.list(
437 0 : Some(&timeline_root),
438 0 : ListingMode::NoDelimiter,
439 0 : None,
440 0 : &cancel,
441 0 : )
442 0 : },
443 0 : |_| false,
444 0 : 3,
445 0 : MAX_RETRIES as u32,
446 0 : "get_timeline_objects",
447 0 : &cancel,
448 0 : )
449 0 : .await
450 0 : .expect("dummy cancellation token")?;
451 :
452 0 : Ok(list.keys)
453 0 : }
454 :
455 : const MAX_KEYS_PER_DELETE: usize = 1000;
456 :
457 : /// Drain a buffer of keys into DeleteObjects requests
458 : ///
459 : /// If `drain` is true, drains keys completely; otherwise stops when <
460 : /// MAX_KEYS_PER_DELETE keys are left.
461 : /// `num_deleted` returns number of deleted keys.
462 0 : async fn do_delete(
463 0 : remote_client: &GenericRemoteStorage,
464 0 : keys: &mut Vec<ListingObject>,
465 0 : dry_run: bool,
466 0 : drain: bool,
467 0 : progress_tracker: &mut DeletionProgressTracker,
468 0 : ) -> anyhow::Result<()> {
469 0 : let cancel = CancellationToken::new();
470 0 : while (!keys.is_empty() && drain) || (keys.len() >= MAX_KEYS_PER_DELETE) {
471 0 : let request_keys =
472 0 : keys.split_off(keys.len() - (std::cmp::min(MAX_KEYS_PER_DELETE, keys.len())));
473 0 :
474 0 : let request_keys: Vec<RemotePath> = request_keys.into_iter().map(|o| o.key).collect();
475 0 :
476 0 : let num_deleted = request_keys.len();
477 0 : if dry_run {
478 0 : tracing::info!("Dry-run deletion of objects: ");
479 0 : for k in request_keys {
480 0 : tracing::info!(" {k:?}");
481 : }
482 : } else {
483 0 : remote_client
484 0 : .delete_objects(&request_keys, &cancel)
485 0 : .await
486 0 : .context("deletetion request")?;
487 0 : progress_tracker.register(num_deleted);
488 : }
489 : }
490 :
491 0 : Ok(())
492 0 : }
493 :
494 : /// Simple tracker reporting each 10k deleted keys.
495 : #[derive(Default)]
496 : struct DeletionProgressTracker {
497 : num_deleted: usize,
498 : last_reported_num_deleted: usize,
499 : }
500 :
501 : impl DeletionProgressTracker {
502 0 : fn register(&mut self, n: usize) {
503 0 : self.num_deleted += n;
504 0 : if self.num_deleted - self.last_reported_num_deleted > 10000 {
505 0 : tracing::info!("progress: deleted {} keys", self.num_deleted);
506 0 : self.last_reported_num_deleted = self.num_deleted;
507 0 : }
508 0 : }
509 : }
510 :
511 0 : pub async fn purge_garbage(
512 0 : input_path: String,
513 0 : mode: PurgeMode,
514 0 : min_age: Duration,
515 0 : dry_run: bool,
516 0 : ) -> anyhow::Result<()> {
517 0 : let list_bytes = tokio::fs::read(&input_path).await?;
518 0 : let garbage_list = serde_json::from_slice::<GarbageList>(&list_bytes)?;
519 0 : tracing::info!(
520 0 : "Loaded {} items in garbage list from {}",
521 0 : garbage_list.items.len(),
522 : input_path
523 : );
524 :
525 0 : let (remote_client, _target) =
526 0 : init_remote(garbage_list.bucket_config.clone(), garbage_list.node_kind).await?;
527 :
528 0 : assert_eq!(
529 0 : &garbage_list.bucket_config.bucket,
530 0 : remote_client.bucket_name().unwrap()
531 0 : );
532 :
533 : // Sanity checks on the incoming list
534 0 : if garbage_list.active_tenant_count == 0 {
535 0 : anyhow::bail!("Refusing to purge a garbage list that reports 0 active tenants");
536 0 : }
537 0 : if garbage_list
538 0 : .items
539 0 : .iter()
540 0 : .any(|g| matches!(g.entity, GarbageEntity::Timeline(_)))
541 0 : && garbage_list.active_timeline_count == 0
542 : {
543 0 : anyhow::bail!("Refusing to purge a garbage list containing garbage timelines that reports 0 active timelines");
544 0 : }
545 0 :
546 0 : let filtered_items = garbage_list
547 0 : .items
548 0 : .iter()
549 0 : .filter(|i| match (&mode, &i.reason) {
550 0 : (PurgeMode::DeletedAndMissing, _) => true,
551 0 : (PurgeMode::DeletedOnly, GarbageReason::DeletedInConsole) => true,
552 0 : (PurgeMode::DeletedOnly, GarbageReason::KnownBug) => true,
553 0 : (PurgeMode::DeletedOnly, GarbageReason::MissingInConsole) => false,
554 0 : });
555 0 :
556 0 : tracing::info!(
557 0 : "Filtered down to {} garbage items based on mode {}",
558 0 : garbage_list.items.len(),
559 : mode
560 : );
561 :
562 0 : let items = tokio_stream::iter(filtered_items.map(Ok));
563 0 : let get_objects_results = items.map_ok(|i| {
564 0 : let remote_client = remote_client.clone();
565 0 : async move {
566 0 : match i.entity {
567 0 : GarbageEntity::Tenant(tenant_id) => {
568 0 : get_tenant_objects(&remote_client, tenant_id).await
569 : }
570 0 : GarbageEntity::Timeline(ttid) => get_timeline_objects(&remote_client, ttid).await,
571 : }
572 0 : }
573 0 : });
574 0 : let mut get_objects_results =
575 0 : std::pin::pin!(get_objects_results.try_buffer_unordered(S3_CONCURRENCY));
576 0 :
577 0 : let mut objects_to_delete = Vec::new();
578 0 : let mut progress_tracker = DeletionProgressTracker::default();
579 0 : while let Some(result) = get_objects_results.next().await {
580 0 : let mut object_list = result?;
581 :
582 : // Extra safety check: even if a collection of objects is garbage, check max() of modification
583 : // times before purging, so that if we incorrectly marked a live tenant as garbage then we would
584 : // notice that its index has been written recently and would omit deleting it.
585 0 : if object_list.is_empty() {
586 : // Simplify subsequent code by ensuring list always has at least one item
587 : // Usually, this only occurs if there is parallel deletions racing us, as there is no empty prefixes
588 0 : continue;
589 0 : }
590 0 : let max_mtime = object_list.iter().map(|o| o.last_modified).max().unwrap();
591 0 : let age = max_mtime.elapsed();
592 0 : match age {
593 : Err(_) => {
594 0 : tracing::warn!("Bad last_modified time");
595 0 : continue;
596 : }
597 0 : Ok(a) if a < min_age => {
598 0 : // Failed age check. This doesn't mean we did something wrong: a tenant might really be garbage and recently
599 0 : // written, but out of an abundance of caution we still don't purge it.
600 0 : tracing::info!(
601 0 : "Skipping tenant with young objects {}..{}",
602 0 : object_list.first().as_ref().unwrap().key,
603 0 : object_list.last().as_ref().unwrap().key
604 : );
605 0 : continue;
606 : }
607 0 : Ok(_) => {
608 0 : // Passed age check
609 0 : }
610 0 : }
611 0 :
612 0 : objects_to_delete.append(&mut object_list);
613 0 : if objects_to_delete.len() >= MAX_KEYS_PER_DELETE {
614 0 : do_delete(
615 0 : &remote_client,
616 0 : &mut objects_to_delete,
617 0 : dry_run,
618 0 : false,
619 0 : &mut progress_tracker,
620 0 : )
621 0 : .await?;
622 0 : }
623 : }
624 :
625 0 : do_delete(
626 0 : &remote_client,
627 0 : &mut objects_to_delete,
628 0 : dry_run,
629 0 : true,
630 0 : &mut progress_tracker,
631 0 : )
632 0 : .await?;
633 :
634 0 : tracing::info!("{} keys deleted in total", progress_tracker.num_deleted);
635 :
636 0 : Ok(())
637 0 : }
|
