k8s underlay 网络配置

wget https://get.helm.sh/helm-v3.9.0-linux-amd64.tar.gz
tar xvf helm-v3.9.0-linux-amd64.tar.gz 
mv linux-amd64/helm /usr/local/bin/
helm repo add hybridnet https://alibaba.github.io/hybridnet/
helm repo update
helm install hybridnet hybridnet/hybridnet -n kube-system --set init.cidr=10.244.0.0/16 
kubectl get node -owide
kubectl get pod -A
kubectl get pod -A -owide
#安装k8s master快捷键
yum install bash-completion -y
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc

kubectl get pod -A -owide #显示所有容器

kubectl label node k8s1-srv-node1-test network=underlay-nethost #给k8s 打标签
kubectl label node k8s1-srv-node2-test network=underlay-nethost
kubectl label node k8s1-srv-node3-test network=underlay-nethost
kubectl label node k8s1-srv-node4-test network=underlay-nethost
vim 1.create-underlay-network.yaml #创建网络

apiVersion: networking.alibaba.com/v1
kind: Network
metadata:
  name: underlay-network1
spec:
  netID: 0
  type: Underlay
  nodeSelector:
    network: "underlay-nethost"

---
apiVersion: networking.alibaba.com/v1
kind: Subnet
metadata:
  name: underlay-network1 
spec:
  network: underlay-network1
  netID: 0
  range:
    version: "4"
    cidr: "192.168.247.0/24"
    gateway: "192.168.247.2"     # 外部网关地址
    start: "192.168.247.10"
    end: "192.168.247.254"

kubectl apply -f 1.create-underlay-network.yaml 
 
[root@k8s1-srv-master1-test data]# kubectl get network
NAME                NETID   TYPE       MODE   V4TOTAL   V4USED   V4AVAILABLE   LASTALLOCATEDV4SUBNET   V6TOTAL   V6USED   V6AVAILABLE   LASTALLOCATEDV6SUBNET
init                4       Overlay           65534     4        65530         init                    0         0        0             
underlay-network1   0       Underlay          972       1        971           underlay-network1       0         0        0 
kubectl create ns myserver 
vi 3.tomcat-app1-underlay.yaml

kind: Deployment
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
metadata:
  labels:
    app: myserver-tomcat-app1-deployment-underlay-label
  name: myserver-tomcat-app1-deployment-underlay
  namespace: myserver
spec:
  replicas: 1
  selector:
    matchLabels:
      app: myserver-tomcat-app1-underlay-selector
  template:
    metadata:
      labels:
        app: myserver-tomcat-app1-underlay-selector
      annotations: #使用Underlay或者Overlay网络
        networking.alibaba.com/network-type: Underlay
    spec:
      #nodeName: k8s-node2.example.com
      containers:
      - name: myserver-tomcat-app1-container
        #image: tomcat:7.0.93-alpine 
        image: registry.cn-hangzhou.aliyuncs.com/zhangshijie/tomcat-app1:v2 
        imagePullPolicy: IfNotPresent
        ##imagePullPolicy: Always
        ports:
        - containerPort: 8080
          protocol: TCP
          name: http
        env:
        - name: "password"
          value: "123456"
        - name: "age"
          value: "18"
#        resources:
#          limits:
#            cpu: 0.5
#            memory: "512Mi"
#          requests:
#            cpu: 0.5
#            memory: "512Mi"

---
kind: Service
apiVersion: v1
metadata:
  labels:
    app: myserver-tomcat-app1-service-underlay-label
  name: myserver-tomcat-app1-service-underlay
  namespace: myserver
spec:
#  type: NodePort
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 8080
    #nodePort: 40003
  selector:
    app: myserver-tomcat-app1-underlay-selector


kubectl apply -f 3.tomcat-app1-underlay.yaml 

kubectl -n myserver get pod -owide

kubectl -n myserver describe pod myserver-tomcat-app1-deployment-underlay-65c6f47db4-qfwwh 

kubectl get node  --show-labels 查看打得标签

kubectl -n myserver get pod -owide #查看pod 信息

kubectl -n myserver describe pod myserver-tomcat-app1-deployment-underlay-65c6f47db4-f6fkq 
kubectl -n myserver get pod -owide
vi 3.tomcat-app1-underlay.yaml
kubectl -n myserver exec -it myserver-tomcat-app1-deployment-underlay-65c6f47db4-f6fkq /bin/sh
kubectl -n myserver get pod -owide