loki-config.yaml

# Enables authentication through the X-Scope-OrgID header, which must be present
# if true. If false, the OrgID will always be set to "fake".
auth_enabled: false

# Server configuration
server:
  # The HTTP server will listen on all network interfaces
  http_listen_address: "0.0.0.0"
  # Defines the port on which the HTTP server will listen
  http_listen_port: 3100

# Compactor
compactor:
  working_directory: /loki/compactor
  shared_store: filesystem
  retention_enabled: true
  retention_delete_delay: 1h
  
# Ingester settings - responsible for writing log data to long-term storage
ingester:
  lifecycler:
    # Address where the ingester can be reached within the infrastructure
    address: "127.0.0.1"
    # Ring configuration to handle distribution of series and tokens
    ring:
      # In-memory key-value store is used
      kvstore:
        store: inmemory
      # Ensures every piece of data is replicated once (not distributed)
      replication_factor: 1
    # Time to sleep after an unclean shutdown
    final_sleep: 0s
  # Duration for an inactive chunk to stay in memory before being flushed to storage
  chunk_idle_period: 5m
  # Length of time to retain chunks in memory after flushing
  chunk_retain_period: 30s

# Schema configuration dictates how logs are stored
schema_config:
  configs:
    # Period configuration starting from 2024-01-01
    - from: 2020-05-15
      # BoltDB is used for indexing log chunks
      store: boltdb
      # Logs are stored in the local filesystem
      object_store: filesystem
      # Schema version
      schema: v11
      # Index prefix for the BoltDB files
      index:
        prefix: index_
        # Time period for each index table, one week in hours
        period: 168h

# Storage configuration detailing where and how the logs should be stored
storage_config:
  # Configuration for the index store using BoltDB
  boltdb:
    # Directory where BoltDB index files will be stored
    directory: /loki/index

  # Filesystem storage configuration for storing chunks
  filesystem:
    # Directory where log chunks will be stored as files
    directory: /loki/chunks

# Limits configuration for controlling ingestion and query behavior
limits_config:
  # Retention policy duration: logs older than this duration will be deleted.
  retention_period: 120h # retention period in hours
  # Whether a metric name must be enfored; false allows metrics without a name
  enforce_metric_name: false
  # Reject samples that are too old according to `reject_old_samples_max_age`
  reject_old_samples: true
  # Maximum accepted age of old samples before they are rejected
  reject_old_samples_max_age: 168h
# ruler:
#   alertmanager_url: http://localhost:9093
# By default, Loki will send anonymous, but uniquely-identifiable usage and configuration
# analytics to Grafana Labs. These statistics are sent to https://stats.grafana.org/
#
# Statistics help us better understand how Loki is used, and they show us performance
# levels for most users. This helps us prioritize features and documentation.
# For more information on what's sent, look at
# https://github.com/grafana/loki/blob/main/pkg/usagestats/stats.go
# Refer to the buildReport method to see what goes into a report.
#
# If you would like to disable reporting, uncomment the following lines:
#analytics:
#  reporting_enabled: false