loki loki-promtail pod 频繁刷新 received file watcher event-优快云博客

问题描述

我的 loko-promtail 有一个节点上的pod 一直刷如下日志：

level=info ts=2025-10-21T09:57:44.509990559Z caller=filetargetmanager.go:192 msg="received file watcher event" name=/var/log/pods/infra_nvidia-device-plugin-gpu-feature-discovery-6kkhb_5805465d-b839-4a59-bb5f-724e5ec4182f/gpu-feature-discovery-ctr/0.log op=CREATE
level=info ts=2025-10-21T09:57:44.516195476Z caller=filetargetmanager.go:192 msg="received file watcher event" name=/var/log/pods/default_auth-middleware-6f8cc7f7c6-hd7hq_cfe5eaf2-5e5a-4f20-ba51-5ce5e9ae957c/auth-middleware/0.log.20251021-175744 op=CREATE
level=info ts=2025-10-21T09:57:44.516582985Z caller=filetargetmanager.go:192 msg="received file watcher event" name=/var/log/pods/default_auth-middleware-6f8cc7f7c6-hd7hq_cfe5eaf2-5e5a-4f20-ba51-5ce5e9ae957c/auth-middleware/0.log op=CREATE
level=info ts=2025-10-21T09:57:44.532780101Z caller=filetargetmanager.go:192 msg="received file watcher event" name=/var/log/pods/default_openbayes-serving-metrics-68bd4dc6f6-4pgx7_277b3ab4-2e62-4331-837e-605b9ec68329/main/0.log.20251021-175744 op=CREATE

然后查看监控，该pod 的cpu 利用率一直很高
在这里插入图片描述
然后一直触发 CPUThrottlingHigh 告警。

解决

编辑 docker 配置文件 /etc/docker/daemon.json 加入如下配置

"log-driver": "json-file",
"log-opts": {
    "max-file": "5",
    "max-size": "10m"
},

执行 systemctl daemon-reload systemctl restart docker 重启docker。