### Directory Structure We'll organize the directories under `/volume1/docker/prometheus` as follows: ```plaintext /volume1/docker/prometheus ├── alertmanager │ └── config.yml ├── grafana ├── loki │ └── local-config.yaml ├── prometheus │ └── prometheus.yml ├── promtail │ └── config.yml ├── docker-compose.yml ``` ### Docker Compose File (docker-compose.yml) Update the `docker-compose.yml` with absolute paths: ```yaml version: '3.8' networks: loki: monitoring: driver: bridge services: prometheus: image: prom/prometheus container_name: prometheus command: - '--config.file=/etc/prometheus/prometheus.yml' ports: - 9090:9090 restart: unless-stopped volumes: - /volume1/docker/prometheus/prometheus:/etc/prometheus - /volume1/docker/prometheus/prom_data:/prometheus networks: - monitoring alertmanager: image: prom/alertmanager container_name: alertmanager ports: - 9093:9093 restart: unless-stopped volumes: - /volume1/docker/prometheus/alertmanager:/etc/alertmanager command: - '--config.file=/etc/alertmanager/config.yml' networks: - monitoring grafana: image: grafana/grafana container_name: grafana ports: - '3000:3000' restart: unless-stopped volumes: - /volume1/docker/prometheus/grafana:/var/lib/grafana networks: - monitoring - loki node_exporter: image: prom/node-exporter container_name: node_exporter ports: - 9100:9100 restart: unless-stopped networks: - monitoring loki: image: grafana/loki:2.6.0 container_name: loki ports: - "3100:3100" command: -config.file=/etc/loki/local-config.yaml volumes: - /volume1/docker/prometheus/loki:/etc/loki - /volume1/docker/prometheus/loki_data:/loki networks: - loki promtail: image: grafana/promtail:2.6.0 container_name: promtail volumes: - /var/log:/var/log - /volume1/docker/prometheus/promtail:/etc/promtail command: -config.file=/etc/promtail/config.yml networks: - loki volumes: prom_data: grafana-storage: loki_data: ``` ### Prometheus Configuration File (prometheus.yml) Create the `prometheus.yml` file in the `/volume1/docker/prometheus/prometheus` directory: ```yaml global: scrape_interval: 15s scrape_timeout: 10s evaluation_interval: 15s alerting: alertmanagers: - static_configs: - targets: ['alertmanager:9093'] scrape_configs: - job_name: 'prometheus' static_configs: - targets: ['localhost:9090'] - job_name: 'node_exporter' static_configs: - targets: ['node_exporter:9100'] ``` ### Alertmanager Configuration File (config.yml) Create the `config.yml` file in the `/volume1/docker/prometheus/alertmanager` directory: ```yaml global: resolve_timeout: 5m route: receiver: 'default' receivers: - name: 'default' ``` ### Loki Configuration File (local-config.yaml) Create the `local-config.yaml` file in the `/volume1/docker/prometheus/loki` directory: ```yaml auth_enabled: false server: http_listen_port: 3100 ingester: lifecycler: ring: kvstore: store: inmemory replication_factor: 1 chunk_idle_period: 5m chunk_retain_period: 30s max_transfer_retries: 0 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: /loki/index cache_location: /loki/cache cache_ttl: 24h shared_store: filesystem filesystem: directory: /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: 0s table_manager: retention_deletes_enabled: false retention_period: 0s ``` ### Promtail Configuration File (config.yml) Create the `config.yml` file in the `/volume1/docker/prometheus/promtail` directory: ```yaml server: http_listen_port: 9080 grpc_listen_port: 0 positions: filename: /tmp/positions.yaml clients: - url: http://loki:3100/loki/api/v1/push scrape_configs: - job_name: system static_configs: - targets: - localhost labels: job: varlogs __path__: /var/log/*log ``` ### Configuring Docker to Route Logs to Loki 1. **Install the Docker Loki plugin:** ```bash docker plugin install grafana/loki-docker-driver:latest --alias loki --grant-all-permissions ``` 2. **Configure Docker daemon to use Loki:** Edit or create the Docker daemon configuration file (`dockerd.json`): **Synology:** ```bash sudo vi var/packages/ContainerManager/etc/dockerd.json ``` Add the following content: ```json { "log-driver": "loki", "log-opts": { "loki-url": "http://localhost:3100/loki/api/v1/push" } } ``` 3. **Restart Docker daemon:** **Synology:** ```bash sudo synopkgctl stop ContainerManager sudo synopkgctl start ContainerManager ``` ### Configuring Grafana to Query Logs 1. **Open Grafana:** Navigate to `http://192.168.1.67:3000`. 2. **Log in:** Use the default credentials (admin/admin) and change the password upon first login. 3. **Add Loki as a Data Source:** - Go to Configuration > Data Sources > Add data source. - Choose Loki. - Set the URL to `http://loki:3100`. - Click Save & Test. ### Deploying the Stack With all the configuration files in place, navigate to the `/volume1/docker/prometheus` directory and start the stack using Docker Compose: ```bash cd /volume1/docker/prometheus docker-compose up -d ``` ### Conclusion You now have a comprehensive observability stack including Prometheus, Grafana, Loki, and Promtail running on your Synology NAS. This setup provides monitoring, alerting, and log aggregation capabilities. If you need any more specific configurations or have any questions, feel free to ask! --- Yes, using `---` at the beginning of a YAML document is a good practice as it explicitly denotes the start of a document. Here is the revised Docker Compose file with the inclusion of `---`: ### Docker Compose File (docker-compose.yml) ```yaml --- version: '3.8' networks: loki: monitoring: driver: bridge services: prometheus: image: prom/prometheus container_name: prometheus command: - '--config.file=/etc/prometheus/prometheus.yml' ports: - 9090:9090 restart: unless-stopped volumes: - /volume1/docker/prometheus/prometheus:/etc/prometheus - /volume1/docker/prometheus/prom_data:/prometheus networks: - monitoring alertmanager: image: prom/alertmanager container_name: alertmanager ports: - 9093:9093 restart: unless-stopped volumes: - /volume1/docker/prometheus/alertmanager:/etc/alertmanager command: - '--config.file=/etc/alertmanager/config.yml' networks: - monitoring grafana: image: grafana/grafana container_name: grafana ports: - '3000:3000' restart: unless-stopped volumes: - /volume1/docker/prometheus/grafana:/var/lib/grafana networks: - monitoring - loki node_exporter: image: prom/node-exporter container_name: node_exporter ports: - 9100:9100 restart: unless-stopped networks: - monitoring loki: image: grafana/loki:2.6.0 container_name: loki ports: - "3100:3100" command: -config.file=/etc/loki/local-config.yaml volumes: - /volume1/docker/prometheus/loki:/etc/loki - /volume1/docker/prometheus/loki_data:/loki networks: - loki promtail: image: grafana/promtail:2.6.0 container_name: promtail volumes: - /var/log:/var/log - /volume1/docker/prometheus/promtail:/etc/promtail command: -config.file=/etc/promtail/config.yml networks: - loki volumes: prom_data: grafana-storage: loki_data: ``` ### Updated Directory Structure Here is a reminder of the directory structure: ```plaintext /volume1/docker/prometheus ├── alertmanager │ └── config.yml ├── grafana ├── loki │ └── local-config.yaml ├── prometheus │ └── prometheus.yml ├── promtail │ └── config.yml ├── docker-compose.yml ``` ### Deploying the Stack With all the configuration files in place, navigate to the `/volume1/docker/prometheus` directory and start the stack using Docker Compose: ```bash cd /volume1/docker/prometheus docker-compose up -d ``` ### Configuring Docker to Route Logs to Loki 1. **Install the Docker Loki plugin:** ```bash docker plugin install grafana/loki-docker-driver:latest --alias loki --grant-all-permissions ``` 2. **Configure Docker daemon to use Loki:** Edit or create the Docker daemon configuration file (`dockerd.json`): **Synology:** ```bash sudo nano /var/packages/Docker/etc/dockerd.json ``` Add the following content: ```json { "log-driver": "loki", "log-opts": { "loki-url": "http://localhost:3100/loki/api/v1/push" } } ``` 3. **Restart Docker daemon:** **Synology:** ```bash sudo synopkgctl stop Docker sudo synopkgctl start Docker ``` ### Configuring Grafana to Query Logs 1. **Open Grafana:** Navigate to `http://:3000`. 2. **Log in:** Use the default credentials (admin/admin) and change the password upon first login. 3. **Add Loki as a Data Source:** - Go to Configuration > Data Sources > Add data source. - Choose Loki. - Set the URL to `http://loki:3100`. - Click Save & Test. ### Conclusion You now have a comprehensive observability stack including Prometheus, Grafana, Loki, and Promtail running on your Synology NAS. This setup provides monitoring, alerting, and log aggregation capabilities. If you need any more specific configurations or have any questions, feel free to ask! --- ### Adding Loki and Promtail to the Docker Compose Setup Here’s an updated `docker-compose.yml` file that includes Loki and Promtail: ```yaml --- version: '3.8' networks: loki: monitoring: driver: bridge services: prometheus: image: prom/prometheus container_name: prometheus command: - '--config.file=/etc/prometheus/prometheus.yml' ports: - 9090:9090 restart: unless-stopped volumes: - ./prometheus:/etc/prometheus - prom_data:/prometheus networks: - monitoring alertmanager: image: prom/alertmanager container_name: alertmanager ports: - 9093:9093 restart: unless-stopped volumes: - ./alertmanager:/etc/alertmanager command: - '--config.file=/etc/alertmanager/config.yml' networks: - monitoring grafana: image: grafana/grafana container_name: grafana ports: - '3000:3000' restart: unless-stopped volumes: - grafana-storage:/var/lib/grafana networks: - monitoring - loki node_exporter: image: prom/node-exporter container_name: node_exporter ports: - 9100:9100 restart: unless-stopped networks: - monitoring loki: image: grafana/loki:2.6.0 container_name: loki ports: - "3100:3100" command: -config.file=/etc/loki/local-config.yaml volumes: - ./loki:/etc/loki networks: - loki promtail: image: grafana/promtail:2.6.0 container_name: promtail volumes: - /var/log:/var/log - ./promtail:/etc/promtail command: -config.file=/etc/promtail/config.yml networks: - loki volumes: prom_data: grafana-storage: ``` ### Loki Configuration File Create a `local-config.yaml` file in the `loki` directory with the following content: ```yaml auth_enabled: false server: http_listen_port: 3100 ingester: lifecycler: ring: kvstore: store: inmemory replication_factor: 1 chunk_idle_period: 5m chunk_retain_period: 30s max_transfer_retries: 0 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: /loki/index cache_location: /loki/cache cache_ttl: 24h shared_store: filesystem filesystem: directory: /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: 0s table_manager: retention_deletes_enabled: false retention_period: 0s ``` ### Promtail Configuration File Create a `config.yml` file in the `promtail` directory with the following content: ```yaml server: http_listen_port: 9080 grpc_listen_port: 0 positions: filename: /tmp/positions.yaml clients: - url: http://loki:3100/loki/api/v1/push scrape_configs: - job_name: system static_configs: - targets: - localhost labels: job: varlogs __path__: /var/log/*log ``` ### Configuring Docker to Route Logs to Loki 1. **Install the Docker Loki plugin:** ```bash docker plugin install grafana/loki-docker-driver:latest --alias loki --grant-all-permissions ``` 2. **Configure Docker daemon to use Loki:** Edit or create the Docker daemon configuration file (`dockerd.json`): **Linux default location:** ```bash sudo nano /etc/docker/daemon.json ``` **Synology:** ```bash sudo nano /var/packages/Docker/etc/dockerd.json ``` Add the following content: ```json { "log-driver": "loki", "log-opts": { "loki-url": "http://localhost:3100/loki/api/v1/push" } } ``` 3. **Restart Docker daemon:** **Linux:** ```bash sudo systemctl restart docker ``` **Synology:** ```bash sudo synopkgctl stop Docker sudo synopkgctl start Docker ``` ### Configuring Grafana to Query Logs 1. **Open Grafana:** Navigate to `http://:3000`. 2. **Log in:** Use the default credentials (admin/admin) and change the password upon first login. 3. **Add Loki as a Data Source:** - Go to Configuration > Data Sources > Add data source. - Choose Loki. - Set the URL to `http://loki:3100`. - Click Save & Test. ### Deploying the Stack With all the configuration files in place, navigate to the `/volume1/docker/prometheus` directory and start the stack using Docker Compose: ```bash cd /volume1/docker/prometheus docker-compose up -d ``` ### Conclusion You now have a comprehensive observability stack including Prometheus, Grafana, Loki, and Promtail running on your Synology NAS. This setup provides monitoring, alerting, and log aggregation capabilities. If you need any more specific configurations or have any questions, feel free to ask!