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Loki Configuration Examples

  1. Complete Local Config
  2. Google Cloud Storage
  3. Cassandra Index
  4. AWS
  5. Using the query-frontend

Complete Local config

auth_enabled: false

server:
  http_listen_port: 3100

ingester:
  lifecycler:
    address: 127.0.0.1
    ring:
      kvstore:
        store: inmemory
      replication_factor: 1
    final_sleep: 0s
  chunk_idle_period: 5m
  chunk_retain_period: 30s

schema_config:
  configs:
  - from: 2018-04-15
    store: boltdb
    object_store: filesystem
    schema: v11
    index:
      prefix: index_
      period: 168h

storage_config:
  boltdb:
    directory: /tmp/loki/index

  filesystem:
    directory: /tmp/loki/chunks

limits_config:
  enforce_metric_name: false
  reject_old_samples: true
  reject_old_samples_max_age: 168h

chunk_store_config:
  max_look_back_period: 0

table_manager:
  chunk_tables_provisioning:
    inactive_read_throughput: 0
    inactive_write_throughput: 0
    provisioned_read_throughput: 0
    provisioned_write_throughput: 0
  index_tables_provisioning:
    inactive_read_throughput: 0
    inactive_write_throughput: 0
    provisioned_read_throughput: 0
    provisioned_write_throughput: 0
  retention_deletes_enabled: false
  retention_period: 0

Google Cloud Storage

This is partial config that uses GCS and Bigtable for the chunk and index stores, respectively.

schema_config:
  configs:
  - from: 2018-04-15
    store: bigtable
    object_store: gcs
    schema: v11
    index:
      prefix: loki_index_
      period: 168h

storage_config:
  bigtable:
    instance: BIGTABLE_INSTANCE
    project: BIGTABLE_PROJECT
  gcs:
    bucket_name: GCS_BUCKET_NAME

Cassandra Index

This is a partial config that uses the local filesystem for chunk storage and Cassandra for the index storage:

schema_config:
  configs:
  - from: 2018-04-15
    store: cassandra
    object_store: filesystem
    schema: v11
    index:
      prefix: cassandra_table
      period: 168h

storage_config:
  cassandra:
    username: cassandra
    password: cassandra
    addresses: 127.0.0.1
    auth: true
    keyspace: lokiindex

  filesystem:
    directory: /tmp/loki/chunks

AWS

This is a partial config that uses S3 for chunk storage and DynamoDB for the index storage:

schema_config:
  configs:
    - from: 2018-04-15
      store: aws
      object_store: s3
      schema: v11
      index:
        prefix: dynamodb_table_name
        period: 0
storage_config:
  aws:
    s3: s3://access_key:secret_access_key@region/bucket_name
    dynamodbconfig:
      dynamodb: dynamodb://access_key:secret_access_key@region

If you don't wish to hard-code S3 credentials, you can also configure an EC2 instance role by changing the storage_config section:

storage_config:
  aws:
    s3: s3://region/bucket_name
    dynamodbconfig:
      dynamodb: dynamodb://region

S3-compatible APIs

S3-compatible APIs (e.g., Ceph Object Storage with an S3-compatible API) can be used. If the API supports path-style URL rather than virtual hosted bucket addressing, configure the URL in storage_config with the custom endpoint:

storage_config:
  aws:
    s3: s3://access_key:secret_access_key@custom_endpoint/bucket_name
    s3forcepathstyle: true

Query Frontend

example configuration