syncKVStoreToLocalMap warms up the local cache by fetching all active entries from the KV store.
(ctx context.Context)
| 324 | |
| 325 | // syncKVStoreToLocalMap warms up the local cache by fetching all active entries from the KV store. |
| 326 | func (c *HATracker) syncKVStoreToLocalMap(ctx context.Context) error { |
| 327 | if !c.cfg.EnableHATracker { |
| 328 | return nil |
| 329 | } |
| 330 | |
| 331 | if !c.cfg.EnableStartupSync { |
| 332 | return nil |
| 333 | } |
| 334 | |
| 335 | start := time.Now() |
| 336 | level.Info(c.logger).Log("msg", "starting HA tracker cache warmup") |
| 337 | |
| 338 | keys, err := c.client.List(ctx, "") |
| 339 | if err != nil { |
| 340 | level.Error(c.logger).Log("msg", "failed to list keys during HA tracker cache warmup", "err", err) |
| 341 | return err |
| 342 | } |
| 343 | |
| 344 | if len(keys) == 0 { |
| 345 | level.Info(c.logger).Log("msg", "HA tracker cache warmup finished", "reason", "no keys found in KV store") |
| 346 | return nil |
| 347 | } |
| 348 | |
| 349 | // create temporarily map |
| 350 | tempElected := make(map[string]ReplicaDesc, len(keys)) |
| 351 | tempReplicaGroups := make(map[string]map[string]struct{}) |
| 352 | successCount := 0 |
| 353 | |
| 354 | for _, key := range keys { |
| 355 | if ctx.Err() != nil { |
| 356 | return ctx.Err() |
| 357 | } |
| 358 | |
| 359 | val, err := c.client.Get(ctx, key) |
| 360 | if err != nil { |
| 361 | level.Warn(c.logger).Log("msg", "failed to fetch key during cache warmup", "key", key, "err", err) |
| 362 | continue |
| 363 | } |
| 364 | |
| 365 | desc, ok := val.(*ReplicaDesc) |
| 366 | if !ok || desc == nil || desc.DeletedAt > 0 { |
| 367 | continue |
| 368 | } |
| 369 | |
| 370 | user, cluster, keyHasSeparator := strings.Cut(key, "/") |
| 371 | if !keyHasSeparator { |
| 372 | continue |
| 373 | } |
| 374 | |
| 375 | tempElected[key] = *desc |
| 376 | if tempReplicaGroups[user] == nil { |
| 377 | tempReplicaGroups[user] = make(map[string]struct{}) |
| 378 | } |
| 379 | tempReplicaGroups[user][cluster] = struct{}{} |
| 380 | successCount++ |
| 381 | } |
| 382 | |
| 383 | c.electedLock.Lock() |