Add loki and alloy for log monitoring

monitoring/.env.example

@@ -19,3 +19,8 @@ ALERTMANAGER_CONFIG_PATH=
 ALERTMANAGER_DATA_DIR=
 
 BLACKBOX_CONFIG_PATH=
+
+LOKI_CONFIG_PATH=
+LOKI_DATA_DIR=
+
+ALLOY_CONFIG_PATH=

monitoring/docker-compose.yml

@@ -40,6 +40,26 @@ services:
     depends_on:
       - prometheus
 
+  loki:
+    image: grafana/loki:3.6.3
+    restart: unless-stopped
+    ports:
+      - "3100:3100"
+    volumes:
+      - ${LOKI_CONFIG_PATH}:/etc/loki/local-config.yaml
+      - ${LOKI_DATA_DIR}:/loki
+    command:
+      - '-config.file=/etc/loki/local-config.yaml -target=all'
+
+  alloy:
+    image: grafana/alloy:1.12.2
+    restart: unless-stopped
+    ports:
+      - "12345:12345"
+    volumes:
+      - ${ALLOY_CONFIG_PATH}:/etc/alloy/config.alloy:ro
+      - /var/log:/var/log:ro
+
   # Node Exporter - Host System Metrics
   node_exporter:
     image: prom/node-exporter:v1.10.2