K8S二进制部署的K8S(1.15)部署hpa功能

#不要把启动文件中例如的
--authentication-token-webhook=true
# 自作聪明的改为
--authentication-token-webhook true
# 不然。。。。。

# metrics-proxy证书请求
cat >metrics-proxy-csr.json <<'EOF'
{
  "CN": "aggregator",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "beiJing",
      "L": "beiJing",
      "O": "zq",
      "OU": "ops"
    }
  ]
}
EOF

#生成mertic证书
cfssl gencert \
    -ca=ca.pem \
    -ca-key=ca-key.pem \
    -config=ca-config.json \
    -profile=peer \
    metrics-proxy-csr.json | cfssl-json -bare metrics-proxy
    
#分发证书到master节点
# profile=peer 中的peer，依据自己的配置改，反正需要有server端和client的证书权限
#略，目录在 /opt/kubernetes/server/bin/cert/

vim /opt/kubernetes/server/bin/kube-apiserver.sh 

  --requestheader-allowed-names "" \
  --requestheader-extra-headers-prefix X-Remote-Extra- \
  --requestheader-group-headers X-Remote-Group \
  --requestheader-username-headers X-Remote-User \
  --proxy-client-cert-file ./cert/metrics-proxy.pem \
  --proxy-client-key-file  ./cert/metrics-proxy-key.pem \

supervisorctl restart kube-apiserver

vim /opt/kubernetes/server/bin/kubelet.sh
#添加参数：
  --authentication-token-webhook=true \
如果有参数：--read-only-port=0，则需删除

#重启服务：
supervisorctl restart kube-kubelet

# 创建目录
mkdir -p  /data/k8s-yaml/metrics/ 
cd /data/k8s-yaml/metrics/

# 下载配置文件
metrics_url='https://raw.githubusercontent.com/kubernetes/kubernetes/v1.14.1/cluster/addons/metrics-server'
wget $metrics_url/auth-delegator.yaml
wget $metrics_url/auth-reader.yaml
wget $metrics_url/metrics-apiservice.yaml
wget $metrics_url/metrics-server-deployment.yaml
wget $metrics_url/metrics-server-service.yaml
wget $metrics_url/resource-reader.yaml

## 修改metrics-server-deployment.yaml
###1 mertics-server部分修改启动参数镜像地址
containers:
      - name: metrics-server
        image: registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-server-amd64:v0.3.1
        command:
        - /metrics-server
        - --metric-resolution=30s
        - --kubelet-insecure-tls
        - --kubelet-preferred-address-types=InternalIP,Hostname,InternalDNS,ExternalDNS,ExternalIP
        
###2 metrics-server-nanny部分修改镜像地址及启动参数
......
- name: metrics-server-nanny
        image: registry.cn-hangzhou.aliyuncs.com/google_containers/addon-resizer:1.8.4
.....
command:
          - /pod_nanny
          - --config-dir=/etc/config
          - --cpu=100m
          - --extra-cpu=0.5m
          - --memory=100Mi
          - --extra-memory=50Mi
          - --threshold=5
          - --deployment=metrics-server-v0.3.1
          - --container=metrics-server
          - --poll-period=300000
          - --estimator=exponential
        
### 在新的版本中，授权文内没有 node/stats 的权限，需要手动去添加resource-reader.yaml 
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: system:metrics-server
rules:
- apiGroups:
  - ""
  resources:
  - pods
  - nodes
  - nodes/stats  ## 添加此参数
  - namespaces

kubectl apply -f .

[root@mmkt-api01 ~]# kubectl top nodes
NAME            CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%
xx01.host.com   411m         2%     36881Mi         57%
xx02.host.com   509m         3%     33127Mi         51%