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chaosblade-operator1.7.2 pod cpu故障注入失败 #234

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wjsshide opened this issue Nov 22, 2023 · 2 comments
Open

chaosblade-operator1.7.2 pod cpu故障注入失败 #234

wjsshide opened this issue Nov 22, 2023 · 2 comments

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@wjsshide
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描述: operator1.7.2注入pod的cpu故障的时候, 直接会把该pod下的容器cpu直接打满
debug发现获取runtime.NumCpu()获取的是宿主机的核数不是容器的cpu核数

yaml文件:
apiVersion: chaosblade.io/v1alpha1
kind: ChaosBlade
metadata:
name: cpu-pod-6
spec:
experiments:

  • scope: pod
    target: cpu
    action: fullload
    desc: "increase pod cpu load by names"
    matchers:
    • name: names
      value:
      • "nginx-6664874ddd-gqjhx"
    • name: cpu-percent
      value:
      • "60"
    • name: namespace
      value:
      • "nginx"
    • name: timeout
      value:
      • "60"
@binbin0325
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binbin0325 commented Nov 23, 2023

pod 注入cpu负载本质就是对容器注入cpu负载,这没啥问题。
runtime.NumCpu()获取的是当前容器的cpu核心数,这里通过_ "go.uber.org/automaxprocs/maxprocs" 进行控制了

@wjsshide
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pod 注入cpu负载本质就是对容器注入cpu负载,这没啥问题。 runtime.NumCpu()获取的是当前容器的cpu核心数,这里通过_ "go.uber.org/automaxprocs/maxprocs" 进行控制了

您好 我对pod注入cpu故障, cpu-percent是60%, pod的cpu limit是1000m, 正常来说 应该把容器cpu打满60%, 但是事实上打了100%, 我加log的 时候发现untime.NumCpu()获取的宿主机的核数,不是容器的核数,go.uber.org/automaxprocs/maxprocs 没生效

我把uber的方法显示在代码调用了一下,结果发现报错了,我理解是因为这个报错导致的cpu获取有问题, 报错信息如下
msg="failed to set GOMAXPROCS: path "/kubepods.slice/kubepods-pod3f8b57a9_829a_4d47_b220_b830da173956.slice/cri-containerd-2b7a54862ac13ec3bf45d691f6e900ba67b27ca3718dab124f6d04e1644ee53e.scope" is not a descendant of mount point root "/kubepods.slice/kubepods-besteffort.slice/kubepods-besteffort-pod497e810a_3a2e_49d6_a6a3_ca9b49062993.slice/cri-containerd-f3ee784b971d2e8e2bff1714496b5c813a9f6dc0e726530b004a4a1a01bc470e.scope" and cannot be exposed from "/sys/fs/cgroup/systemd"" location="/go/src/github.com/chaosblade-io/chaosblade/target/cache/chaosblade-exec-os/exec/cpu/cpu.go:180" uid=1c50e84360e9a90c

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