K8s 노드 NotReady

1 개요

k8s NotReady node
k8s down/unreachable node

root@localhost:~# kubectl get nodes
NAME                     STATUS       ROLES     AGE     VERSION
kubernetes-node-861h     NotReady     <none>    1h      v1.13.0
kubernetes-node-bols     Ready        <none>    1h      v1.13.0
kubernetes-node-st6x     Ready        <none>    1h      v1.13.0
kubernetes-node-unaj     Ready        <none>    1h      v1.13.0

root@localhost:~# kubectl describe node kubernetes-node-861h
Name:			kubernetes-node-861h
Role
Labels:		 kubernetes.io/arch=amd64
           kubernetes.io/os=linux
           kubernetes.io/hostname=kubernetes-node-861h
Annotations:        node.alpha.kubernetes.io/ttl=0
                    volumes.kubernetes.io/controller-managed-attach-detach=true
Taints:             <none>
CreationTimestamp:	Mon, 04 Sep 2017 17:13:23 +0800
Phase:
Conditions:
  Type		Status		LastHeartbeatTime			LastTransitionTime			Reason					Message
  ----    ------    -----------------     ------------------      ------          -------
  OutOfDisk             Unknown         Fri, 08 Sep 2017 16:04:28 +0800         Fri, 08 Sep 2017 16:20:58 +0800         NodeStatusUnknown       Kubelet stopped posting node status.
  MemoryPressure        Unknown         Fri, 08 Sep 2017 16:04:28 +0800         Fri, 08 Sep 2017 16:20:58 +0800         NodeStatusUnknown       Kubelet stopped posting node status.
  DiskPressure          Unknown         Fri, 08 Sep 2017 16:04:28 +0800         Fri, 08 Sep 2017 16:20:58 +0800         NodeStatusUnknown       Kubelet stopped posting node status.
  Ready                 Unknown         Fri, 08 Sep 2017 16:04:28 +0800         Fri, 08 Sep 2017 16:20:58 +0800         NodeStatusUnknown       Kubelet stopped posting node status.
Addresses:	10.240.115.55,104.197.0.26
Capacity:
 cpu:           2
 hugePages:     0
 memory:        4046788Ki
 pods:          110
Allocatable:
 cpu:           1500m
 hugePages:     0
 memory:        1479263Ki
 pods:          110
System Info:
 Machine ID:                    8e025a21a4254e11b028584d9d8b12c4
 System UUID:                   349075D1-D169-4F25-9F2A-E886850C47E3
 Boot ID:                       5cd18b37-c5bd-4658-94e0-e436d3f110e0
 Kernel Version:                4.4.0-31-generic
 OS Image:                      Debian GNU/Linux 8 (jessie)
 Operating System:              linux
 Architecture:                  amd64
 Container Runtime Version:     docker://1.12.5
 Kubelet Version:               v1.6.9+a3d1dfa6f4335
 Kube-Proxy Version:            v1.6.9+a3d1dfa6f4335
ExternalID:                     15233045891481496305
Non-terminated Pods:            (9 in total)
  Namespace                     Name                                            CPU Requests    CPU Limits      Memory Requests Memory Limits
  ---------                     ----                                            ------------    ----------      --------------- -------------
......
Allocated resources:
  (Total limits may be over 100 percent, i.e., overcommitted.)
  CPU Requests  CPU Limits      Memory Requests         Memory Limits
  ------------  ----------      ---------------         -------------
  900m (60%)    2200m (146%)    1009286400 (66%)        5681286400 (375%)
Events:         <none>

root@localhost:~# kubectl get node kubernetes-node-861h -o yaml
apiVersion: v1
kind: Node
metadata:
  creationTimestamp: 2015-07-10T21:32:29Z
  labels:
    kubernetes.io/hostname: kubernetes-node-861h
  name: kubernetes-node-861h
  resourceVersion: "757"
  selfLink: /api/v1/nodes/kubernetes-node-861h
  uid: 2a69374e-274b-11e5-a234-42010af0d969
spec:
  externalID: "15233045891481496305"
  podCIDR: 10.244.0.0/24
  providerID: gce://striped-torus-760/us-central1-b/kubernetes-node-861h
status:
  addresses:
  - address: 10.240.115.55
    type: InternalIP
  - address: 104.197.0.26
    type: ExternalIP
  capacity:
    cpu: "1"
    memory: 3800808Ki
    pods: "100"
  conditions:
  - lastHeartbeatTime: 2015-07-10T21:34:32Z
    lastTransitionTime: 2015-07-10T21:35:15Z
    reason: Kubelet stopped posting node status.
    status: Unknown
    type: Ready
  nodeInfo:
    bootID: 4e316776-b40d-4f78-a4ea-ab0d73390897
    containerRuntimeVersion: docker://Unknown
    kernelVersion: 3.16.0-0.bpo.4-amd64
    kubeProxyVersion: v0.21.1-185-gffc5a86098dc01
    kubeletVersion: v0.21.1-185-gffc5a86098dc01
    machineID: ""
    osImage: Debian GNU/Linux 7 (wheezy)
    systemUUID: ABE5F6B4-D44B-108B-C46A-24CCE16C8B6E

2 같이 보기

3 참고

https://kubernetes.io/docs/tasks/debug-application-cluster/debug-application-introspection/#example-debugging-a-down-unreachable-node