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Download and install Loki

curl -O -L "https://github.com/grafana/loki/releases/latest/download/loki-linux-amd64.zip"
sudo apt install -y unzip
unzip loki-linux-amd64.zip
sudo mv loki-linux-amd64 /usr/local/bin/loki
sudo chmod +x /usr/local/bin/loki

Config file

Create /etc/loki/config.yaml — minimal single-node setup listening on port 4100:
auth_enabled: false

server:
  http_listen_port: 4100

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

schema_config:
  configs:
    - from: 2024-01-01
      store: tsdb
      object_store: filesystem
      schema: v13
      index:
        prefix: index_
        period: 24h

Create directories

sudo mkdir -p /var/lib/loki/chunks /var/lib/loki/rules
sudo chown -R nobody:nogroup /var/lib/loki

systemd service

Create /etc/systemd/system/loki.service:
[Unit]
Description=Loki log aggregation
After=network.target

[Service]
User=nobody
ExecStart=/usr/local/bin/loki -config.file=/etc/loki/config.yaml
Restart=always

[Install]
WantedBy=multi-user.target

Enable and start

sudo systemctl daemon-reload
sudo systemctl enable --now loki
sudo systemctl status loki --no-pager
Verify Loki is listening on port 4100:
  curl http://localhost:4100/ready
  # Should return: ready