d

docker-compose/loki/docker-compose.yml.j2

@@ -1,51 +1,51 @@
-version: "3"
-services:
-  loki:
-    image: grafana/loki:2.9.0
-    ports:
-      - "3100:3100"
-    command: -config.file=/etc/loki/local-config.yaml
-    networks:
-      - loki
+version: '3.8'
 
-  promtail:
-    image: grafana/promtail:2.9.0
-    volumes:
-      - /var/log:/var/log
-    command: -config.file=/etc/promtail/config.yml
+services:
+  nginx-app:
+    container_name: nginx-app
+    image: nginx
+    labels:
+      logging: "promtail"
+      logging_jobname: "containerlogs"
+    ports:
+      - 8080:80
     networks:
-      - loki
+      - app
 
   grafana:
-    environment:
-      - GF_PATHS_PROVISIONING=/etc/grafana/provisioning
-      - GF_AUTH_ANONYMOUS_ENABLED=true
-      - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
-    entrypoint:
-      - sh
-      - -euc
-      - |
-        mkdir -p /etc/grafana/provisioning/datasources
-        cat <<EOF > /etc/grafana/provisioning/datasources/ds.yaml
-        apiVersion: 1
-        datasources:
-        - name: Loki
-          type: loki
-          access: proxy
-          orgId: 1
-          url: http://loki:3100
-          basicAuth: false
-          isDefault: true
-          version: 1
-          editable: false
-        EOF
-        /run.sh
     image: grafana/grafana:latest
     ports:
-      - "3000:3000"
+      - 3000:3000
+    volumes:
+      - grafana-datasources.yml:/etc/grafana/provisioning/datasources/datasources.yaml
+    environment:
+      - GF_AUTH_ANONYMOUS_ENABLED=true
+      - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
+      - GF_AUTH_DISABLE_LOGIN_FORM=true
     networks:
-      - loki
+      - app
 
+  loki:
+    image: grafana/loki:latest
+    ports:
+      - 3100:3100
+    command: -config.file=/etc/loki/local-config.yaml
+    networks:
+      - app
+
+  promtail:
+    image:  grafana/promtail:latest
+    container_name: promtail
+    volumes:
+      - promtail.yaml:/etc/promtail/docker-config.yaml
+      - /var/lib/docker/containers:/var/lib/docker/containers:ro
+      - /var/run/docker.sock:/var/run/docker.sock
+    command: -config.file=/etc/promtail/docker-config.yaml
+    depends_on:
+      - loki
+    networks:
+      - app
 
 networks:
-  loki:
+  app:
+    name: app

docker-compose/loki/grafana-datasources.yml

@@ -0,0 +1,10 @@
+apiVersion: 1
+
+datasources:
+  - name: Loki
+    type: loki
+    access: proxy
+    url: http://loki:3100
+    version: 1
+    editable: false
+    isDefault: true

docker-compose/loki/promtail.yaml

@@ -0,0 +1,29 @@
+# https://ruanbekker.medium.com/logging-with-docker-promtail-and-grafana-loki-d920fd790ca8
+# https://grafana.com/docs/loki/latest/clients/promtail/configuration/
+# https://docs.docker.com/engine/api/v1.41/#operation/ContainerList
+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: flog_scrape
+    docker_sd_configs:
+      - host: unix:///var/run/docker.sock
+        refresh_interval: 5s
+        #filters:
+        #  - name: label
+        #    values: ["logging=promtail"]
+    relabel_configs:
+      - source_labels: ['__meta_docker_container_name']
+        regex: '/(.*)'
+        target_label: 'container'
+      - source_labels: ['__meta_docker_container_log_stream']
+        target_label: 'logstream'
+      - source_labels: ['__meta_docker_container_label_logging_jobname']
+        target_label: 'job'