kubernetes - 由于 CPU 不足，Pod 处于挂起状态

Question

在我的 GCE Kubernetes 集群上，我无法再创建 pod。

Warning FailedScheduling    pod (www.caveconditions.com-f1be467e31c7b00bc983fbe5efdbb8eb-438ef) failed to fit in any node
fit failure on node (gke-prod-cluster-default-pool-b39c7f0c-c0ug): Insufficient CPU

查看该节点的分配统计信息

Non-terminated Pods:        (8 in total)
  Namespace         Name                                        CPU Requests    CPU Limits  Memory Requests Memory Limits
  ---------         ----                                        ------------    ----------  --------------- -------------
  default           dev.caveconditions.com-n80z8                            100m (10%)  0 (0%)      0 (0%)      0 (0%)
  default           lamp-cnmrc                                  100m (10%)  0 (0%)      0 (0%)      0 (0%)
  default           mongo-2-h59ly                                   200m (20%)  0 (0%)      0 (0%)      0 (0%)
  default           www.caveconditions.com-tl7pa                            100m (10%)  0 (0%)      0 (0%)      0 (0%)
  kube-system           fluentd-cloud-logging-gke-prod-cluster-default-pool-b39c7f0c-c0ug       100m (10%)  0 (0%)      200Mi (5%)  200Mi (5%)
  kube-system           kube-dns-v17-qp5la                              110m (11%)  110m (11%)  120Mi (3%)  220Mi (5%)
  kube-system           kube-proxy-gke-prod-cluster-default-pool-b39c7f0c-c0ug              100m (10%)  0 (0%)      0 (0%)      0 (0%)
  kube-system           kubernetes-dashboard-v1.1.0-orphh                       100m (10%)  100m (10%)  50Mi (1%)   50Mi (1%)
Allocated resources:
  (Total limits may be over 100%, i.e., overcommitted. More info: http://releases.k8s.io/HEAD/docs/user-guide/compute-resources.md)
  CPU Requests  CPU Limits  Memory Requests Memory Limits
  ------------  ----------  --------------- -------------
  910m (91%)    210m (21%)  370Mi (9%)  470Mi (12%)

当然，我已经分配了 91%，不能再分配 10%。但是不能过度提交资源吗？

服务器的平均使用率约为 10%



如果我不能使用更多资源，那将是一种耻辱。

Answer 1

是的，目前不支持过量使用。正在计划改进 http://kubernetes.io/docs/user-guide/compute-resources .
github上的相关问题:https://github.com/kubernetes/kubernetes/issues/168

ps:理论上你可以定义自定义节点容量，但我不确定。