Kubernetes hpa cpu利用率

Question

我发现istio网关的HPA出了点问题。

为什么10m等于10%？1000万不是1%吗？

Kubernetes版本为1.18.5。

# kubectl get hpa --all-namespaces
NAMESPACE      NAME                   REFERENCE                         TARGETS   MINPODS   MAXPODS   REPLICAS   AGE
istio-system   istio-egressgateway    Deployment/istio-egressgateway    7%/80%    2         10        2          13d
istio-system   istio-ingressgateway   Deployment/istio-ingressgateway   10%/80%   2         10        2          21d
istio-system   istiod                 Deployment/istiod                 0%/80%    1         5         1          21d
qa2            graph                  Deployment/graph                  2%/50%    1         10        1          7h35m
qa2            member                 Deployment/member                 0%/50%    1         10        1          7h38m

# kubectl describe hpa istio-ingressgateway -n istio-system | grep "resource cpu"
  resource cpu on pods  (as a percentage of request):  10% (10m) / 80%

# kubectl describe hpa istio-egressgateway -n istio-system | grep "resource cpu"
  resource cpu on pods  (as a percentage of request):  7% (7m) / 80%

# kubectl describe hpa istiod -n istio-system | grep "resource cpu"
  resource cpu on pods  (as a percentage of request):  0% (3m) / 80%

# kubectl describe hpa graph -n qa2 | grep "resource cpu"
  resource cpu on pods  (as a percentage of request):  2% (24m) / 50%

# kubectl describe hpa member -n qa2 | grep "resource cpu"
  resource cpu on pods  (as a percentage of request):  1% (12m) / 50%

Answer 1

这些值并不相同，并且它们不是直接从彼此计算得到的。

百分比中的值是目标平均利用率(对应于targetAverageUtilization参数)，它相对于请求值。

括号中的值是目标平均值(targetAverageValue)，它不是以百分比度量的-这是指标的绝对原始值。