Monitoring Stack

Simple Docker Compose config for a monitoring & visualization stack with Cloudflared, Loki, cAdvisor, Promtail, Prometheus, Node Exporter & Grafana.

Remember to create all the necessary folders (unless you want to have all these folders as root):

# Loki 
mkdir -p ./loki/config
mkdir -p ${VOLUME_DIR}/loki/index
mkdir -p ${VOLUME_DIR}/loki/chunks
mkdir -p ${VOLUME_DIR}/loki/wal

# Promtail
mkdir -p ./promtail/config
mkdir -p ${VOLUME_DIR}/promtail/data
mkdir -p ${VOLUME_DIR}/promtail/log

# Grafana
mkdir -p ${VOLUME_DIR}/grafana/data
mkdir -p ./grafana/datasources

# remember to make sure that you set the correct rights
# Loki
chown ${PUID}:${PGID} ./loki/config
chown ${PUID}:${PGID} ${VOLUME_DIR}/loki/index
chown ${PUID}:${PGID} ${VOLUME_DIR}/loki/chunks
chown ${PUID}:${PGID} ${VOLUME_DIR}/loki/wal

# Promtail
chown ${PUID}:${PGID} ./promtail/config
chown ${PUID}:${PGID} ${VOLUME_DIR}/promtail/data
chown ${PUID}:${PGID} ${VOLUME_DIR}/promtail/log

# Grafana
chown ${PUID}:${PGID} ${VOLUME_DIR}/grafana/data
chown ${PUID}:${PGID} ./grafana/datasources

---

Also, I am not sure if it's a good idea, but I sent all the Docker logs to Loki. You can do this by modifying the /etc/docker/daemon.json file:

{
  "log-driver": "loki",
  "log-opts": {
    "loki-url": "http://localhost:3100/loki/api/v1/push"
  }
}

You'll also need to allow only internal traffic to reach Loki, unless you want to open the 3100 port to everyone (maybe you want to send logs from other systems. I don't. Yet.) You'll need to add the following to the docker-compose.yaml:

...
  loki:
    image: grafana/loki:latest
    container_name: loki
    ports:
      - 127.0.0.1:3100:3100 # <- this is the line we need to add.
          # this binds the host machine's IP address (127.0.0.1) and port 3100 to the container's service port 3100. 
          # This allows you to access the service running inside the container through 127.0.0.1:3100 on your local machine.
    volumes:
      - ./loki/config:/etc/loki
      - ${VOLUME_DIR}/loki/index:/data/loki/index
      - ${VOLUME_DIR}/loki/chunks:/data/loki/chunks
      - ${VOLUME_DIR}/loki/wal:/wal
    command: -config.file=/etc/loki/local-config.yaml
    user: "${UID}:${GID}"
    restart: unless-stopped
...

---

These are the dashboards I use for this:

• Cadvisor Exporter - 14282
• Node Exporter Full - 1860

I didn't make my own because why reinvent the wheel?