如何创建查询以监控 docker 容器一天运行了多少分钟 [英] how to create query to monitoring how many minutes docker containers ran for a day

问题描述

我正在尝试监控 docker 容器，但是在进行查询以监控容器一天运行的分钟数时遇到问题

I am trying to monitor docker containers, but I have problems when making a query to monitor how many minutes the container runs in a day

count(rate(container_last_seen{id=~"/docker/.*",instance=~"$node"}[1d]))

这是我的查询，用于显示一天运行多少个容器，但我不知道监控容器一天运行多少分钟

this is my query to show how many container run in a day, but i don't have idea for monitoring how many minutes container runs in a day

推荐答案

如果您知道 container_last_seen 指标的数据点之间的间隔(它被称为 scrape_interval，通常是在 Prometheus 配置文件中配置)，那么以下查询可用于计算容器在最后一天运行的持续时间(以秒为单位):

If you know interval between data points for container_last_seen metric (it is known as scrape_interval and is usually configured in Prometheus config file), then the following query could be used for calculating the duration in seconds when container was running during the last day:

count_over_time(
  (changes(container_last_seen{id=~"/docker/.*",instance=~"$node"}[<3*scrape_interval>])>0)
  [1d:<3*scrape_interval>]
)*<3*scrape_interval>

例如，如果 scrape_interval 等于 10s，则查询将如下所示:

For example, if scrape_interval equals to 10s, then the query will look like:

count_over_time(
  (changes(container_last_seen{id=~"/docker/.*",instance=~"$node"}[30s])>0)
  [1d:30s]
)*30

此查询使用 PromQL 子查询来计算数量<当 container_last_seen 时间序列至少有一个变化时，code>30s 间隔.

This query uses PromQL subqueries for calculating the number 30s intervals when container_last_seen time series had at least a single change.

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