修复业务侧日志采集失败问题

deployments/observability/config/promtail.yaml

@@ -0,0 +1,61 @@
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: /tmp/positions.yaml
+
+clients:
+  - url: ${LOKI_URL}
+    bearer_token: ${OBS_AUTH_TOKEN}
+
+scrape_configs:
+  # ============================================
+  # chat-deploy 业务层日志采集
+  # ============================================
+  - job_name: chat-deploy-logs
+    static_configs:
+      - targets:
+          - localhost
+        labels:
+          job: chat-deploy-logs
+          project: ${OBS_PROJECT}
+          service: ${OBS_SERVICE}
+          log_layer: business
+          __path__: /var/lib/docker/containers/*/*-json.log
+
+    pipeline_stages:
+      # 解析 Docker JSON 日志格式
+      - docker: {}
+
+      # 从文件路径提取容器 ID
+      - regex:
+          source: filename
+          expression: '/var/lib/docker/containers/(?P<container_id>[0-9a-f]{12})[0-9a-f]*/'
+      - labels:
+          container_id:
+
+      # ============================================
+      # 过滤规则：只丢弃基础设施层日志
+      # 保留 chat-deploy 业务层日志（包括Go服务的caller日志）
+      # ============================================
+      
+      # 1. 丢弃 promtail/prometheus/grafana 等基础设施组件的内部日志
+      - drop:
+          expression: 'caller=.*(promtail|prometheus|grafana|loki|exporter).*\.go:[0-9]+'
+          drop_counter_reason: infra_go_internal_log
+
+      # 2. 丢弃基础设施组件日志（prometheus/grafana/exporter等）
+      - drop:
+          expression: '(component=|target=|scrape_pool=|instance=.*exporter)'
+          drop_counter_reason: infrastructure_component
+
+      # 3. 丢弃 Docker 服务发现和 API 错误日志
+      - drop:
+          expression: '(docker_discovery|Unable to refresh target groups|client version.*is too old|Minimum supported API version)'
+          drop_counter_reason: docker_api_error
+
+      # 4. 丢弃文件监控事件日志（promtail 内部）
+      - drop:
+          expression: '(file watcher event|filetargetmanager|fsnotify)'
+          drop_counter_reason: file_watcher