A Loki-based logging stack consists of 3 components:
- Promtail is the agent, responsible for gathering logs and sending them to Loki.
- Loki is the main server, responsible for storing logs and processing queries.
- Grafana for querying and displaying the logs.
- Download Loki
wget https://github.com/grafana/loki/releases/download/v2.9.8/loki-linux-amd64.zip
chmod a+x loki-linux-amd64
sudo cp loki-linux-amd64 /usr/local/bin/loki
loki --version
- Create Systemd service
sudo nano /etc/systemd/system/loki.service
[Unit]
Description=Loki is a log aggregation system designed to store and query logs from all your applications and infrastructure.
Document=https://github.com/grafana/loki/releases
After=network.target
[Service]
Type=simple
ExecStart=/usr/local/bin/loki -config.file /mnt/data/loki/loki-config.yaml
Restart=on-failure
RestartSec=10
StandardOutput=append:/mnt/data/loki/logs/loki.log
StandardError=append:/mnt/data/loki/logs/loki.log
[Install]
WantedBy=multi-user.target
# This is a complete configuration to deploy Loki backed by the filesystem.
# The index will be shipped to the storage via tsdb-shipper.
auth_enabled: false
server:
http_listen_port: 3100
common:
ring:
instance_addr: 127.0.0.1
kvstore:
store: inmemory
replication_factor: 1
path_prefix: /mnt/data/loki
storage:
filesystem:
chunks_directory: /mnt/data/loki/chunks
rules_directory: /mnt/data/loki/rules
schema_config:
configs:
- from: 2020-05-15
store: tsdb
object_store: filesystem
schema: v13
index:
prefix: index_
period: 24h
storage_config:
filesystem:
directory: /mnt/data/loki/chunks