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openjdk:8-jre-alpine 导致 Runtime.getRuntime().availableProcessors() 获取到的 CPU 核数不准确 #4474

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klboke opened this issue Jul 20, 2022 · 0 comments
Closed
3 tasks done

openjdk:8-jre-alpine 导致 Runtime.getRuntime().availableProcessors() 获取到的 CPU 核数不准确 #4474

klboke opened this issue Jul 20, 2022 · 0 comments

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@klboke
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klboke commented Jul 20, 2022

描述bug

openjdk:8-jre-alpine 镜像导致 Runtime.getRuntime().availableProcessors() 获取到的 CPU 核数不准确，如在 k8s 里定义 4C：

  resources:
    requests:
      cpu: 4
      memory: 6Gi
    limits:
      cpu: 4
      memory: 6Gi

程序里只返回了 2C
复现

通过如下步骤可以复现：

  1. 在 k8s 里启动 Apollo 服务， requests 、limits 都限制 4C
  2. 访问 Portal 的 /prometheus 接口
  3. 查看 system_cpu_count 指标，是否和 limits 吻合

期望
修改基础镜像为：openjdk:8-jre-slim
@klboke klboke changed the title openjdk:8-jre-alpine 镜像导致 Runtime.getRuntime().availableProcessors() 获取到的 CPU 核数不准确 openjdk:8-jre-alpine 导致 Runtime.getRuntime().availableProcessors() 获取到的 CPU 核数不准确 Jul 20, 2022
klboke added a commit to klboke/apollo that referenced this issue Jul 20, 2022
@klboke
fix(apolloconfig#4474):'openjdk:8-jre-alpine' potentially causing wro…
277b05d 
…ng number of cpu cores
@klboke klboke mentioned this issue Jul 20, 2022
Merged
@klboke klboke closed this as completed Jul 22, 2022
@givemesomefaces givemesomefaces mentioned this issue Aug 2, 2022
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@klboke