# Loki Retention Policy Configuration
# Task P2-2.3: Centralized Logging with ELK/Loki Stack
#
# This file defines the retention policies for logs stored in Loki.
# Logs older than the retention period are automatically deleted.

# Global retention settings
retention:
  # Default retention period for all log entries
  # Format: integer with unit (h=hours, d=days)
  # 30 days = 720 hours
  default_period: 720h

  # Tenant-specific retention overrides (if using multi-tenant Loki)
  # Uncomment and customize as needed
  # overrides:
  #   tenant1: 1440h    # 60 days for tenant1
  #   tenant2: 360h     # 15 days for tenant2

# Compactor settings for retention enforcement
compactor:
  # Enable automatic compaction
  enabled: true

  # How often to run the compaction process
  compaction_interval: 10m

  # Delete delay before marking chunks as ready for deletion
  retention_delete_delay: 2h

  # Number of workers that will delete marked chunks
  retention_delete_worker_count: 150

  # Working directory for temporary files
  working_directory: /loki/compactor

  # Which store to use (filesystem, s3, etc.)
  shared_store: filesystem

# Table manager settings for automatic table cleanup
table_manager:
  # Enable automatic table management
  enabled: true

  # How often to check and create/delete tables
  poll_interval: 10m

  # Enable retention enforcement
  retention_deletes_enabled: true

  # Retention period in hours (30 days)
  retention_period: 720h

  # Grace period before deleting tables
  creation_grace_period: 10m

# Index configuration for retention
schema:
  - from: 2020-10-24
    store: boltdb-shipper
    object_store: filesystem
    schema: v11
    index:
      prefix: index_
      period: 24h

# Deletion settings
deletion:
  # How many hours before a chunk can be deleted
  hours_until_deleted: 0

  # How long a delete request stays active before being deleted
  max_delete_request_age: 168h  # 7 days

  # Maximum number of parallel delete operations
  max_delete_parallelism: 150

# Cleanup settings for expired logs
cleanup:
  # Enable periodic cleanup
  enabled: true

  # How often to run cleanup
  interval: 30m

  # Skip logs that are still being written to
  skip_recent: true

  # Keep logs younger than this duration
  keep_duration: 24h

# Tier configuration for storage optimization
tiers:
  # Frequently accessed logs (hot)
  - name: hot
    period: 24h
    delete_after: 2h

  # Medium-term logs (warm)
  - name: warm
    period: 7d
    delete_after: 1d

  # Old logs (cold) - minimal access
  - name: cold
    period: 30d
    delete_after: 30d