官方Prometheus鏡像,使用的不是咱們上海的時區,我們可以用上海時區文件創建一個configmap,然后掛載到啟動的Prometheus容器里:
kubectl create configmap prometheus-time-zone --from-file=/usr/share/zoneinfo/Asia/Shanghai
然后掛載:
volumeMounts:
- name: prometheus-time-zone
mountPath: /etc/localtime
subPath: Shanghai
然后可以把容器里的時區改成上海時區,東八區

用date 驗證時間是本地時間了
但這個只是改了Prometheus容器得本地時區文件而已。centos系統 就是/etc/localtime Ubuntu是/etc/timezone
但是Prometheus 是在代碼里,統一做得UTC轉換
類似這樣:

所以機器上(容器里)的時區並不起作用。
至於為什么這么做,官方給了說明:
Can I change the timezone? Why is everything in UTC?
To avoid any kind of timezone confusion, especially when the so-called daylight saving time is involved, we decided to exclusively use Unix time internally and UTC for display purposes in all components of Prometheus. A carefully done timezone selection could be introduced into the UI. Contributions are welcome. See issue #500 for the current state of this effort.
github 討論:
https://github.com/prometheus/prometheus/issues/500
所以想做時間本地化,就直接在外部程序做好了。
其實官方也是這樣做的:

這里的use local time 就是輸出后,前端js做了一次轉換。
