Implement batch-expiration for objects (#17946)

Based on an initial PR from -
https://github.com/minio/minio/pull/17792

But fully completes it with newer finalized YAML spec.

internal/config/batch/batch.go

@@ -0,0 +1,160 @@
+// Copyright (c) 2015-2023 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package batch
+
+import (
+	"sync"
+	"time"
+
+	"github.com/minio/minio/internal/config"
+	"github.com/minio/pkg/env"
+)
+
+// Batch job environment variables
+const (
+	ReplicationWorkersWait = "replication_workers_wait"
+	KeyRotationWorkersWait = "keyrotation_workers_wait"
+	ExpirationWorkersWait  = "expiration_workers_wait"
+
+	EnvReplicationWorkersWait   = "MINIO_BATCH_REPLICATION_WORKERS_WAIT"
+	EnvKeyRotationWorkersWait   = "MINIO_BATCH_KEYROTATION_WORKERS_WAIT"
+	EnvKeyExpirationWorkersWait = "MINIO_BATCH_EXPIRATION_WORKERS_WAIT"
+)
+
+var configMu sync.RWMutex
+
+// Config represents the batch job settings.
+type Config struct {
+	ReplicationWorkersWait time.Duration `json:"replicationWorkersWait"`
+	KeyRotationWorkersWait time.Duration `json:"keyRotationWorkersWait"`
+	ExpirationWorkersWait  time.Duration `json:"expirationWorkersWait"`
+}
+
+// ExpirationWait returns the duration for which a batch expiration worker
+// would wait before working on next object.
+func (opts Config) ExpirationWait() time.Duration {
+	configMu.RLock()
+	defer configMu.RUnlock()
+
+	return opts.ExpirationWorkersWait
+}
+
+// ReplicationWait returns the duration for which a batch replication worker
+// would wait before working on next object.
+func (opts Config) ReplicationWait() time.Duration {
+	configMu.RLock()
+	defer configMu.RUnlock()
+
+	return opts.ReplicationWorkersWait
+}
+
+// KeyRotationWait returns the duration for which a batch key-rotation worker
+// would wait before working on next object.
+func (opts Config) KeyRotationWait() time.Duration {
+	configMu.RLock()
+	defer configMu.RUnlock()
+
+	return opts.KeyRotationWorkersWait
+}
+
+// Clone returns a copy of Config value
+func (opts Config) Clone() Config {
+	configMu.RLock()
+	defer configMu.RUnlock()
+
+	return Config{
+		ReplicationWorkersWait: opts.ReplicationWorkersWait,
+		KeyRotationWorkersWait: opts.KeyRotationWorkersWait,
+		ExpirationWorkersWait:  opts.ExpirationWorkersWait,
+	}
+}
+
+// Update updates opts with nopts
+func (opts *Config) Update(nopts Config) {
+	configMu.Lock()
+	defer configMu.Unlock()
+
+	opts.ReplicationWorkersWait = nopts.ReplicationWorkersWait
+	opts.KeyRotationWorkersWait = nopts.KeyRotationWorkersWait
+	opts.ExpirationWorkersWait = nopts.ExpirationWorkersWait
+}
+
+// DefaultKVS - default KV config for batch job settings
+var DefaultKVS = config.KVS{
+	config.KV{
+		Key:   ReplicationWorkersWait,
+		Value: "0ms", // No wait by default between each replication attempts.
+	},
+	config.KV{
+		Key:   KeyRotationWorkersWait,
+		Value: "0ms", // No wait by default between each key rotation attempts.
+	},
+	config.KV{
+		Key:   ExpirationWorkersWait,
+		Value: "0ms", // No wait by default between each expiration attempts.
+	},
+}
+
+// LookupConfig - lookup config and override with valid environment settings if any.
+func LookupConfig(kvs config.KVS) (cfg Config, err error) {
+	if err = config.CheckValidKeys(config.BatchSubSys, kvs, DefaultKVS); err != nil {
+		return cfg, err
+	}
+
+	cfg.ReplicationWorkersWait = 0
+	cfg.KeyRotationWorkersWait = 0
+	cfg.ExpirationWorkersWait = 0
+
+	rduration, err := time.ParseDuration(env.Get(EnvReplicationWorkersWait, kvs.GetWithDefault(ReplicationWorkersWait, DefaultKVS)))
+	if err != nil {
+		return cfg, err
+	}
+	if rduration < 0 {
+		return cfg, config.ErrInvalidBatchReplicationWorkersWait(nil)
+	}
+
+	kduration, err := time.ParseDuration(env.Get(EnvKeyRotationWorkersWait, kvs.GetWithDefault(KeyRotationWorkersWait, DefaultKVS)))
+	if err != nil {
+		return cfg, err
+	}
+	if kduration < 0 {
+		return cfg, config.ErrInvalidBatchKeyRotationWorkersWait(nil)
+	}
+
+	eduration, err := time.ParseDuration(env.Get(EnvKeyExpirationWorkersWait, kvs.GetWithDefault(ExpirationWorkersWait, DefaultKVS)))
+	if err != nil {
+		return cfg, err
+	}
+	if eduration < 0 {
+		return cfg, config.ErrInvalidBatchExpirationWorkersWait(nil)
+	}
+
+	if rduration > 0 {
+		cfg.ReplicationWorkersWait = rduration
+	}
+
+	if kduration > 0 {
+		cfg.KeyRotationWorkersWait = kduration
+	}
+
+	if eduration > 0 {
+		cfg.ExpirationWorkersWait = eduration
+	}
+
+	return cfg, nil
+}

internal/config/batch/help.go

@@ -0,0 +1,49 @@
+// Copyright (c) 2015-2023 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package batch
+
+import "github.com/minio/minio/internal/config"
+
+// Help template for batch feature.
+var (
+	defaultHelpPostfix = func(key string) string {
+		return config.DefaultHelpPostfix(DefaultKVS, key)
+	}
+
+	// Help provides help for config values
+	Help = config.HelpKVS{
+		config.HelpKV{
+			Key:         ReplicationWorkersWait,
+			Description: `maximum sleep duration between objects to slow down batch replication operation` + defaultHelpPostfix(ReplicationWorkersWait),
+			Optional:    true,
+			Type:        "duration",
+		},
+		config.HelpKV{
+			Key:         KeyRotationWorkersWait,
+			Description: `maximum sleep duration between objects to slow down batch keyrotation operation` + defaultHelpPostfix(KeyRotationWorkersWait),
+			Optional:    true,
+			Type:        "duration",
+		},
+		config.HelpKV{
+			Key:         ExpirationWorkersWait,
+			Description: "maximum sleep duration between objects to slow down batch expiration operation" + defaultHelpPostfix(ExpirationWorkersWait),
+			Optional:    true,
+			Type:        "duration",
+		},
+	}
+)