安装完metrics-server -v0.5.2版后，

# kubectl top nodes
Error from server (ServiceUnavailable): the server is currently unable to handle the request (get nodes.metrics.k8s.io)

解决方式,修改yaml文件

kind: Deployment
spec:
  template:
    spec:
      nodeName: k8s-master          ##第一次改动，新增此行
      containers:
      - args:
        .....
        - --secure-port=4430             ##第三次改动，原4443改成4430
        ......
        - --kubelet-insecure-tls         ##第二次改动，新增此行
        .......
        ports:
        - containerPort: 4430            ##第三次改动，原4443改成4430

改完看看下效果

# kubectl top pods -A
NAMESPACE              NAME                                         CPU(cores)   MEMORY(bytes)   
default                mongo-75f59d57f4-f5s24                       23m          81Mi            
kube-system            coredns-7d89d9b6b8-mtk84                     4m           18Mi            
kube-system            coredns-7d89d9b6b8-x864t                     2m           14Mi            
kube-system            etcd-k8s-master                              32m          86Mi            
kube-system            kube-apiserver-k8s-master                    127m         337Mi           
kube-system            kube-controller-manager-k8s-master           54m          54Mi            
kube-system            kube-flannel-ds-f467b                        6m           36Mi            
kube-system            kube-flannel-ds-xb8lh                        4m           31Mi            
kube-system            kube-proxy-2z76m                             3m           17Mi            
kube-system            kube-proxy-6wkrd                             1m           18Mi            
kube-system            kube-scheduler-k8s-master                    15m          21Mi            
kube-system            metrics-server-7f965c6c96-c96xh              8m           21Mi            
kubernetes-dashboard   dashboard-metrics-scraper-856586f554-r2zfp   1m           15Mi            
kubernetes-dashboard   kubernetes-dashboard-67484c44f6-4wpw7        1m           16Mi           
# kubectl top nodes
NAME         CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%   
k8s-master   555m         27%    1503Mi          40%       
k8s-node1    141m         7%     725Mi           19% 

OK，搞定。

好久没玩k8s了，最近装了1.28版，于次安装metrics-server

# wget https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.7.1/components.yaml -O metrics-server-v071.yaml

# diff metrics-server-v0.5.2.yaml metrics-server-v071.yaml 
38a39,44
>   - nodes/metrics
>   verbs:
>   - get
> - apiGroups:
>   - ""
>   resources:
41,43d46
<   - nodes/stats
<   - namespaces
<   - configmaps
130d132
<       nodeName: k8s-master
134c136
<         - --secure-port=4430
---
>         - --secure-port=10250
138,139c140
<         - --kubelet-insecure-tls
<         image: registry.cn-hangzhou.aliyuncs.com/ivesgdidf/metrics-server:v0.5.2
---
>         image: registry.k8s.io/metrics-server/metrics-server:v0.7.1
150c151
<         - containerPort: 4430
---
>         - containerPort: 10250
165a167,170
>           allowPrivilegeEscalation: false
>           capabilities:
>             drop:
>             - ALL
168a174,175
>           seccompProfile:
>             type: RuntimeDefault

大体上没有太多变化

# kubectl apply -f metrics-server-v071.yaml 
# kubectl get pods -A 
NAMESPACE      NAME                               READY   STATUS             RESTARTS      AGE
。。。。。。
kube-system    metrics-server-6d94bc8694-dzfpd    0/1     ImagePullBackOff   0             3m2s

# kubectl describe pod metrics-server-6d94bc8694-dzfpd -n kube-system 

Events:
  Type     Reason          Age                    From               Message
  ----     ------          ----                   ----               -------
  Normal   Scheduled       9m30s                  default-scheduler  Successfully assigned kube-system/metrics-server-6d94bc8694-dzfpd to k8s-node01
  Normal   SandboxChanged  8m51s                  kubelet            Pod sandbox changed, it will be killed and re-created.
  Warning  Failed          7m25s                  kubelet            Failed to pull image "registry.k8s.io/metrics-server/metrics-server:v0.7.1": Error response from daemon: Head "https://us-west2-docker.pkg.dev/v2/k8s-artifacts-prod/images/metrics-server/metrics-server/manifests/v0.7.1": dial tcp 64.233.188.82:443: connect: connection refused
  Warning  Failed          6m51s (x6 over 8m50s)  kubelet            Error: ImagePullBackOff
  Normal   Pulling         6m40s (x4 over 9m14s)  kubelet            Pulling image "registry.k8s.io/metrics-server/metrics-server:v0.7.1"
  Warning  Failed          6m17s (x3 over 8m51s)  kubelet            Failed to pull image "registry.k8s.io/metrics-server/metrics-server:v0.7.1": Error response from daemon: Head "https://asia-east1-docker.pkg.dev/v2/k8s-artifacts-prod/images/metrics-server/metrics-server/manifests/v0.7.1": dial tcp 64.233.188.82:443: connect: connection refused
  Warning  Failed          6m17s (x4 over 8m51s)  kubelet            Error: ErrImagePull
  Normal   BackOff         4m5s (x13 over 8m50s)  kubelet            Back-off pulling image "registry.k8s.io/metrics-server/metrics-server:v0.7.1"


# grep -n image metrics-server-v071.yaml 
140:        image: registry.k8s.io/metrics-server/metrics-server:v0.7.1
141:        imagePullPolicy: IfNotPresent

镜像卡了，下不来。。网络不好。。。有空再处理