helm安裝ingress

​一、安裝Helm

# wget https://get.helm.sh/helm-v3.3.4-linux-amd64.tar.gz
​
# tart -zxvf helm-v3.3.4-linux-amd64.tar.gz 
​
# mv linux-amd64/helm /usr/local/bin/helm
​
# helm version
version.BuildInfo{Version:"v3.3.4", GitCommit:"a61ce5633af99708171414353ed49547cf05013d", GitTreeState:"clean", GoVersion:"go1.14.9"}

二、下載ingress

# mkdir ingress && cd ingress
# 新建倉庫
# helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
​
# helm pull ingress ingress-nginx/ingress-nginx
# tar -xf ingress-nginx-3.7.1.tgz && cd ingress-nginx

三、安裝ingress

1. 修改values.yaml

# 修改controller映象地址
repository: registry.cn-beijing.aliyuncs.com/dotbalo/controller
​
# dnsPolicy
dnsPolicy: ClusterFirstWithHostNet
​
# 使用hostNetwork,即使用宿主機上的埠80 443
hostNetwork: true
​
# 使用DaemonSet,將ingress部署在指定節點上
kind: DaemonSet
​
# 節點選擇，將需要部署的節點打上ingress=true的label
  nodeSelector:
    kubernetes.io/os: linux
    ingress: "true"
    
# 修改type,改為ClusterIP。如果在雲環境，有loadbanace可以使用loadbanace
type: ClusterIP
​
# 修改kube-webhook-certgen映象地址
registry.cn-beijing.aliyuncs.com/dotbalo/kube-webhook-certgen

2. 安裝ingress

# 選擇節點打label
# kubectl label node node01 ingress=true
​
# 建立一個ingress的namespace
# kubectl create ns ingress-nginx
​
# 建立ingress
# helm install ingress-nginx -n ingress-nginx
​
# kubectl get pods -n ingress-nginx -owide
NAME                             READY   STATUS    RESTARTS   AGE   IP               NODE     NOMINATED NODE   READINESS GATES
ingress-nginx-controller-mrb2t   1/1     Running   0          15h   192.168.10.243   node01   <none>           <none>
 

四、使用ingress

1. Ingress配置檔案

   ingress-example.yaml
   
   apiVersion: networking.k8s.io/v1beta1
   kind: Ingress
   metadata:
     name: example-ingress
     annotations:
       kubernetes.io/ingressClass: "nginx"
   spec:
     rules:
     - host: foo.bar.com
       http:
         paths:
         - path: /
           backend:
             serviceName: nginx-svc
             servicePort: 80
   

   　　

   kubernetes.io/ingressClass: "nginx"：使用ingressClass: "nginx"，告訴ingress實現的配置

   rules： 一個rules可以有多個host

   host : 訪問ingress的域名

   path : 類似於nginx的location配置，同一個host可以配置多個path

   backend：描述Service和ServicePort的組合。對ingress匹配主機和路徑的HTTP與HTTPS請求將被轉發到後端Pod

2. 建立一個nginx的Deployment

   apiVersion: v1
   kind: Service
   metadata:
     name: nginx-svc
     labels:
       app: nginx-svc
   spec:
     selector:
       app: nginx
     ports:
     - name: http
       protocol: TCP
       port: 80
       targetPort: 80
   ---
   apiVersion: apps/v1
   kind: Deployment
   metadata:
     annotations:
       deployment.kubernetes.io/revision: "1"
     labels:
       app: nginx
     name: nginx
     namespace: default
   spec:
     progressDeadlineSeconds: 600
     replicas: 2 #副本數
     revisionHistoryLimit: 10 # 歷史記錄保留的個數
     selector:
       matchLabels:
         app: nginx
     strategy:
       rollingUpdate:
         maxSurge: 25%
         maxUnavailable: 25%
       type: RollingUpdate
     template:
       metadata:
         labels:
           app: nginx
       spec:
         containers:
         - image: nginx:1.15.2
           imagePullPolicy: IfNotPresent
           name: nginx
           terminationMessagePath: /dev/termination-log
           terminationMessagePolicy: File
         restartPolicy: Always
         terminationGracePeriodSeconds: 30
   ​

3. 建立

   # kubectl create -f ingress-example.yaml 
   Warning: networking.k8s.io/v1beta1 Ingress is deprecated in v1.19+, unavailable in v1.22+; use networking.k8s.io/v1 Ingress
   ingress.networking.k8s.io/example-ingress created
   

   　　

   檢視ingress

   # kubectl get ingress
   Warning: extensions/v1beta1 Ingress is deprecated in v1.14+, unavailable in v1.22+; use networking.k8s.io/v1 Ingress
   NAME              CLASS    HOSTS         ADDRESS         PORTS   AGE
   example-ingress   <none>   foo.bar.com   10.101.32.165   80      107s
   

   　　

4. 修改本機hosts檔案，訪問far.bar.com