今早收到了Prometheus的报警，4% of Kubernetes nodes are not ready。
直接查看node情况即可知道原因。
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| banfushen@pro:~/helm-chart/prometheus-netease/templates$ kubectl describe nodes ip-xx-x-xxx-xxx.ap-northeast-1.compute.internal
Name: ip-xx-x-xxx-xxx.ap-northeast-1.compute.internal
Roles: node
Labels: beta.kubernetes.io/arch=amd64
beta.kubernetes.io/instance-type=c5.xlarge
beta.kubernetes.io/os=linux
failure-domain.beta.kubernetes.io/region=ap-northeast-1
failure-domain.beta.kubernetes.io/zone=ap-northeast-1c
kubernetes.io/hostname=ip-xx-x-xxx-xxx.ap-northeast-1.compute.internal
kubernetes.io/role=node
node-role.kubernetes.io/node=
Annotations: node.alpha.kubernetes.io/ttl: 0
volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp: Sat, 24 Jul 2021 03:05:08 +0800
Taints: <none>
Unschedulable: false
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
OutOfDisk False Sat, 24 Jul 2021 18:00:31 +0800 Sat, 24 Jul 2021 03:05:08 +0800 KubeletHasSufficientDisk kubelet has sufficient disk space available
MemoryPressure False Sat, 24 Jul 2021 18:00:31 +0800 Sat, 24 Jul 2021 03:05:08 +0800 KubeletHasSufficientMemory kubelet has sufficient memory available
DiskPressure False Sat, 24 Jul 2021 18:00:31 +0800 Sat, 24 Jul 2021 03:05:08 +0800 KubeletHasNoDiskPressure kubelet has no disk pressure
PIDPressure False Sat, 24 Jul 2021 18:00:31 +0800 Sat, 24 Jul 2021 03:05:08 +0800 KubeletHasSufficientPID kubelet has sufficient PID available
Ready True Sat, 24 Jul 2021 18:00:31 +0800 Sat, 24 Jul 2021 03:05:28 +0800 KubeletReady kubelet is posting ready status
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