指令如下：
kubectl get nodes
kubectl describe node NODE_NAME
输出如下（这儿只关注status字段中得addresses、capacity、allocatable、conditions）：
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|
status:
addresses:
- address: 192.168.23.61
type: InternalIP
- address: node2
type: Hostname
allocatable:
cpu: "2"
ephemeral-storage: "27761957638"
hugepages-2Mi: "0"
memory: 3777764Ki
pods: "110"
capacity:
cpu: "2"
ephemeral-storage: 30123652Ki
hugepages-2Mi: "0"
memory: 3880164Ki
pods: "110"
conditions:
- lastHeartbeatTime: "2021-12-24T09:47:07Z"
lastTransitionTime: "2021-12-24T09:47:07Z"
message: Flannel is running on this node
reason: FlannelIsUp
status: "False"
type: NetworkUnavailable
- lastHeartbeatTime: "2021-12-29T06:26:44Z"
lastTransitionTime: "2021-12-24T09:46:37Z"
message: kubelet has sufficient memory available
reason: KubeletHasSufficientMemory
status: "False"
type: MemoryPressure
- lastHeartbeatTime: "2021-12-29T06:26:44Z"
lastTransitionTime: "2021-12-24T09:46:37Z"
message: kubelet has no disk pressure
reason: KubeletHasNoDiskPressure
status: "False"
type: DiskPressure
- lastHeartbeatTime: "2021-12-29T06:26:44Z"
lastTransitionTime: "2021-12-24T09:46:37Z"
message: kubelet has sufficient PID available
reason: KubeletHasSufficientPID
status: "False"
type: PIDPressure
- lastHeartbeatTime: "2021-12-29T06:26:44Z"
lastTransitionTime: "2021-12-24T09:46:43Z"
message: kubelet is posting ready status
reason: KubeletReady
status: "True"
type: Ready
daemonEndpoints:
kubeletEndpoint:
Port: 10250
images:
- names:
- rancher/rancher@sha256:f411ee37efa38d7891c11ecdd5c60ca73eb03dcd32296678af808f6b4ecccfff
- rancher/rancher:v2.6.3
sizeBytes: 1162917989
- names:
- rancher/shell@sha256:9c33c0e58ceb0b3cb6a85d2a6349b1f7fe818e383e6a3cb46671558fbb2f7781
- rancher/shell:v0.1.14
sizeBytes: 170950834
- names:
- rancher/fleet-agent@sha256:c929f1f23b69a7269921aba5b7c4c407428fb978939101659f72e441863b332b
- rancher/fleet-agent:v0.3.8
sizeBytes: 154998416
- names:
- nginx@sha256:c97ee70c4048fe79765f7c2ec0931957c2898f47400128f4f3640d0ae5d60d10
- nginx:1.8
sizeBytes: 133241734
- names:
- k8s.gcr.io/kube-proxy@sha256:d5334eee53a3f0ddff4588b25e7e7f5bbd96b9a728eee0ae1a19c0e1b23c29d5
- k8s.gcr.io/kube-proxy:v1.21.8
sizeBytes: 103567283
- names:
- nginx@sha256:e3456c851a152494c3e4ff5fcc26f240206abac0c9d794affb40e0714846c451
- nginx:1.7.9
sizeBytes: 91664166
- names:
- rancher/fleet@sha256:b83872e82bf2f1b47133e6052823a8854297f974dc0e236142fcec2173b48218
- rancher/fleet:v0.3.8
sizeBytes: 73351324
- names:
- quay.io/coreos/flannel@sha256:9a296fbb67790659adc3701e287adde3c59803b7fcefe354f1fc482840cdb3d9
- quay.io/coreos/flannel:v0.15.1
sizeBytes: 69516425
- names:
- quay.io/jetstack/cert-manager-controller@sha256:330f19ed47bdbd34a0c11c5a58ccceead1b118eb29aa7202d374e71003937d48
- quay.io/jetstack/cert-manager-controller:v1.5.1
sizeBytes: 63334645
- names:
- rancher/gitjob@sha256:6c0ecbe6f566cee572d572689a569aed67661ce7b2a1ec22581821dabc9aad58
- rancher/gitjob:v0.1.23
sizeBytes: 61509831
- names:
- eipwork/metrics-server@sha256:2a8e43d89e434b6235858444bb0701c44bd03475d2937fdf6831a7bb4ee14240
- eipwork/metrics-server:v0.3.7
sizeBytes: 55367782
- names:
- quay.io/jetstack/cert-manager-webhook@sha256:45934ab42749e8c90da0726734155374f4ea55d7796246264e7adea87569918a
- quay.io/jetstack/cert-manager-webhook:v1.6.1
sizeBytes: 46625554
- names:
- quay.io/jetstack/cert-manager-webhook@sha256:d6c8924dc61a2d6e83f21f4bf584ff6b5a8837afe7342a044a90bc3c0f75009a
- quay.io/jetstack/cert-manager-webhook:v1.5.1
sizeBytes: 46396684
- names:
- quay.io/jetstack/cert-manager-cainjector@sha256:910eb00317ccb8482f39f395027fb40f1ed6a28f834970b5ff66aeb1bb89f8c8
- quay.io/jetstack/cert-manager-cainjector:v1.5.1
sizeBytes: 42243730
- names:
- quay.io/jetstack/cert-manager-cainjector@sha256:916ef12af73c8a4cbdfb6127d6f513f476f3aeed2447ec7f1a58a95113bda713
- quay.io/jetstack/cert-manager-cainjector:v1.6.1
sizeBytes: 42000784
- names:
- wangyanglinux/myapp@sha256:9c3dc30b5219788b2b8a4b065f548b922a34479577befb54b03330999d30d513
- wangyanglinux/myapp:v1
sizeBytes: 15504557
- names:
- rancher/mirrored-flannelcni-flannel-cni-plugin@sha256:bfe8f30c74bc6f31eba0cc6659e396dbdd5ab171314ed542cc238ae046660ede
- rancher/mirrored-flannelcni-flannel-cni-plugin:v1.0.0
sizeBytes: 9031177
- names:
- k8s.gcr.io/pause@sha256:6c3835cab3980f11b83277305d0d736051c32b17606f5ec59f1dda67c9ba3810
- k8s.gcr.io/pause:3.4.1
sizeBytes: 682696
nodeInfo:
architecture: amd64
bootID: 9661796e-a93d-4f48-8999-b80eb2d48cad
containerRuntimeVersion: docker://20.10.6
kernelVersion: 3.10.0-1160.el7.x86_64
kubeProxyVersion: v1.21.0
kubeletVersion: v1.21.0
machineID: 9cf3ac32ce194bcf946e35b4419afbe4
operatingSystem: linux
osImage: CentOS Linux 7 (Core)
systemUUID: 5979B22F-C64B-4F24-A195-64A08DC3AC84
|
addresses
capacity
allocatable
conditions
描述了节点的状态，conditons的例子有：
- OutOfDisk：磁盘空间不足，无法运行新的Pod时则为True，否则为False
- Ready：节点健康且可以接受新的Pod，则为True，否则我False
- MemoryPressure：内存紧张则为True，否则为False
- PIDPressure：进程过多则为True，否则为False
- DiskPressure：磁盘空间紧张则为True，否则为False
- NetworkUnvailable：网络配置有问题则为True，否则为False