Single-node small & lightweight Grafana Loki deployment

loki.yml

auth_enabled: false

analytics:
  reporting_enabled: false

server:
  http_listen_port: 3100

common:
  path_prefix: /var/loki
  storage:
    filesystem:
      chunks_directory: /var/loki/chunks
      rules_directory: /var/loki/rules
  replication_factor: 1
  ring:
    instance_addr: 127.0.0.1
    kvstore:
      store: inmemory

ingester:
  wal:
    enabled: true
    dir: /var/loki/ingester
  lifecycler:
    address: 127.0.0.1
    ring:
      kvstore:
        store: inmemory
      replication_factor: 1
    final_sleep: 0s
  chunk_idle_period: 1h       # Any chunk not receiving new logs in this time will be flushed
  max_chunk_age: 1h           # All chunks will be flushed when they hit this age, default is 1h
  chunk_target_size: 1048576  # Loki will attempt to build chunks up to 1.5MB, flushing first if chunk_idle_period or max_chunk_age is reached first
  chunk_retain_period: 30s    # Must be greater than index read cache TTL if using an index cache (Default index read cache TTL is 5m)
  max_transfer_retries: 0     # Chunk transfers disabled

compactor:
  working_directory: /var/loki/retention
  shared_store: filesystem
  compaction_interval: 10m
  retention_enabled: true
  retention_delete_delay: 2h
  retention_delete_worker_count: 150

schema_config:
  configs:
    - from: 2020-10-24
      store: boltdb-shipper
      object_store: filesystem
      schema: v11
      index:
        prefix: index_
        period: 24h

storage_config:
  boltdb_shipper:
    active_index_directory: /var/loki/index
    cache_location: /var/loki/boltdb-cache
    shared_store: filesystem
  gcs:
    bucket_name: loki

limits_config:
  max_streams_per_user: 0
  max_global_streams_per_user: 0
  retention_period: 24h

table_manager:
  retention_deletes_enabled: true
  retention_period: 24h

query_range:
  parallelise_shardable_queries: false
  split_queries_by_interval: 0

Systemd config /etc/systemd/system/loki.yml

[Unit]
Description=Loki service
After=network.target

[Service]
Type=simple
User=loki
ExecStart=/bin/loki -config.file /etc/loki.yml

[Install]
WantedBy=multi-user.target

useradd --system loki
mkdir /var/loki
chown loki:loki /var/loki
systemctl enable --now loki