coreos kube-aws K8s 集群节点必须有一个名为 "KubernetesCluster" 的标签才能加入

Question

我一直在试验该脚本，似乎如果集群（不确定是只有节点还是控制器和节点）没有带有唯一值的 aws 标签 "KubernetesCluster"，节点似乎没有添加到集群中，在跟踪节点 journalctl -f:

时，您会收到以下错误而不是循环

  ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:13.577214    2195 kubelet_node_status.go:293] Unable to update node status: update node status exceeds retry count
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:14.308473    2195 eviction_manager.go:162] eviction manager: unexpected err: failed GetNode: node 'ip-11-0-0-70.eu-west-1.compute.internal' not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: I1124 08:04:15.694850    2195 kubelet_node_status.go:203] Setting node annotation to enable volume controller attach/detach
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: I1124 08:04:15.694877    2195 kubelet_node_status.go:245] Adding node label from cloud provider: beta.kubernetes.io/instance-type=r3.xlarge
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: I1124 08:04:15.694886    2195 kubelet_node_status.go:256] Adding node label from cloud provider: failure-domain.beta.kubernetes.io/zone=eu-west-1a
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: I1124 08:04:15.694893    2195 kubelet_node_status.go:260] Adding node label from cloud provider: failure-domain.beta.kubernetes.io/region=eu-west-1
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: W1124 08:04:15.698242    2195 kubelet.go:1788] Deleting mirror pod "kube-proxy-ip-11-0-0-70.eu-west-1.compute.internal_kube-system(85ec9262-b21c-11e6-9b4e-066c9da0e3d3)" because it is outdated
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: I1124 08:04:16.587224    2195 kubelet_node_status.go:203] Setting node annotation to enable volume controller attach/detach
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: I1124 08:04:16.587252    2195 kubelet_node_status.go:245] Adding node label from cloud provider: beta.kubernetes.io/instance-type=r3.xlarge
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: I1124 08:04:16.587261    2195 kubelet_node_status.go:256] Adding node label from cloud provider: failure-domain.beta.kubernetes.io/zone=eu-west-1a
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: I1124 08:04:16.587268    2195 kubelet_node_status.go:260] Adding node label from cloud provider: failure-domain.beta.kubernetes.io/region=eu-west-1
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:23.592830    2195 kubelet_node_status.go:301] Error updating node status, will retry: error getting node "ip-11-0-0-70.eu-west-1.compute.internal": nodes "ip-11-0-0-70.eu-west-1.compute.internal" not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:23.594352    2195 kubelet_node_status.go:301] Error updating node status, will retry: error getting node "ip-11-0-0-70.eu-west-1.compute.internal": nodes "ip-11-0-0-70.eu-west-1.compute.internal" not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:23.595353    2195 kubelet_node_status.go:301] Error updating node status, will retry: error getting node "ip-11-0-0-70.eu-west-1.compute.internal": nodes "ip-11-0-0-70.eu-west-1.compute.internal" not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:23.597125    2195 kubelet_node_status.go:301] Error updating node status, will retry: error getting node "ip-11-0-0-70.eu-west-1.compute.internal": nodes "ip-11-0-0-70.eu-west-1.compute.internal" not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:23.598994    2195 kubelet_node_status.go:301] Error updating node status, will retry: error getting node "ip-11-0-0-70.eu-west-1.compute.internal": nodes "ip-11-0-0-70.eu-west-1.compute.internal" not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:23.599012    2195 kubelet_node_status.go:293] Unable to update node status: update node status exceeds retry count
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:24.344163    2195 eviction_manager.go:162] eviction manager: unexpected err: failed GetNode: node 'ip-11-0-0-70.eu-west-1.compute.internal' not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:33.627869    2195 kubelet_node_status.go:301] Error updating node status, will retry: error getting node "ip-11-0-0-70.eu-west-1.compute.internal": nodes "ip-11-0-0-70.eu-west-1.compute.internal" not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:33.628985    2195 kubelet_node_status.go:301] Error updating node status, will retry: error getting node "ip-11-0-0-70.eu-west-1.compute.internal": nodes "ip-11-0-0-70.eu-west-1.compute.internal" not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:33.630883    2195 kubelet_node_status.go:301] Error updating node status, will retry: error getting node "ip-11-0-0-70.eu-west-1.compute.internal": nodes "ip-11-0-0-70.eu-west-1.compute.internal" not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:33.632268    2195 kubelet_node_status.go:301] Error updating node status, will retry: error getting node "ip-11-0-0-70.eu-west-1.compute.internal": nodes "ip-11-0-0-70.eu-west-1.compute.internal" not found
    ip-11-0-0-70.eu-west-1.compute.internal kubelet-wrapper[2195]: E1124 08:04:33.633703    2195 kubelet_node_status.go:301] Error updating node status, will retry: error getting node "ip-11-0-0-70.eu-west-1.compute.internal": nodes "ip-11-0-0-70.eu-west-1.compute.internal" not found

任何人都可以解释这种行为吗？

kube-aws version v0.8.3

谢谢

Answer 1

KubernetesCluster 标签，每个集群都有一个唯一的值，对于 AWS 资源是强制性的，这样集群可以提供创建 ELB 等云功能。

本文档详述：https://github.com/kubernetes/kubernetes/blob/master/docs/design/aws_under_the_hood.md

Answer 2

kube-aws 确实在机器上创建了标签（包括 KubernetesCluster）或者尝试最新版本 0.9.4-rc2