关于kubernetes:kubernetes-安装-ingress-controller

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ingress-nginx

ingress 官方网站
ingress 仓库地址
ingress-nginx v1.0 最新版本 v1.0
实用于 Kubernetes 版本 v1.19+（包含 v1.19）
Kubernetes-v1.22+ 须要应用 ingress-nginx>=1.0，因为 networking.k8s.io/v1beta 曾经移除

间接部署 ingress-nginx

间接部署比较简单，间接拉去 girhub 的文件就能够了，如果遇到长时间无响应，能够终止工作从新拉取。
拉取镜像局部，能够批改为一下的镜像地址

wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.0.0/deploy/static/provider/baremetal/deploy.yaml

sed -i 's@k8s.gcr.io/ingress-nginx/controller:v1.0.0\(.*\)@willdockerhub/ingress-nginx-controller:v1.0.0@' deploy.yaml
sed -i 's@k8s.gcr.io/ingress-nginx/kube-webhook-certgen:v1.0\(.*\)$@hzde0128/kube-webhook-certgen:v1.0@' deploy.yaml
kubectl apply -f ingress-nginx.yaml

查看装置

Completed 状态的是失常的，能够疏忽。

[root@master ~]# kubectl get po -n ingress-nginx
NAME                                        READY   STATUS      RESTARTS   AGE
ingress-nginx-admission-create-pm6sw        0/1     Completed   0          22m
ingress-nginx-admission-patch-m8w94         0/1     Completed   0          22m
ingress-nginx-controller-7d4df87d89-272ft   1/1     Running     0          22m
[root@master ~]# kubectl get svc -n ingress-nginx
NAME                                 TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)                      AGE
ingress-nginx-controller             NodePort    10.96.88.139   <none>        80:30497/TCP,443:32581/TCP   22m
ingress-nginx-controller-admission   ClusterIP   10.96.193.26   <none>        443/TCP                      22m

创立利用 yaml

vim tomcat.yaml
apiVersion: apps/v1 
kind: Deployment   
metadata:             
  name: tomcat-deployment     
  labels:       
    app: tomcat  
spec:          
  replicas: 2 
  selector:      
    matchLabels: 
      app: tomcat
  minReadySeconds: 1
  progressDeadlineSeconds: 60
  revisionHistoryLimit: 2
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
  template:        
    metadata:  
      labels:  
        app: tomcat
    spec:         
      containers:     
      - name: tomcat     
        image: wenlongxue/tomcat:tomcat-demo-62-8fe6052    
        imagePullPolicy: Always          
        ports:
        - containerPort: 8080
        resources:
          requests:
            memory: "2Gi"
            cpu: "80m"
          limits: 
            memory: "2Gi" 
            cpu: "80m"
        readinessProbe:
          httpGet:
            path: /
            port: 8080
          initialDelaySeconds: 180
          periodSeconds: 5
          timeoutSeconds: 3
          successThreshold: 1
          failureThreshold: 30
---
apiVersion: v1
kind: Service
metadata:      
  name: tomcat-service
  labels:      
    app: tomcat 
spec:        
  selector:   
    app: tomcat  
  ports:
  - name: tomcat-port 
    protocol: TCP      
    port: 8080         
    targetPort: 8080   
  type: ClusterIP

部署 tomcat 利用

kubectl  apply  -f  tomcat.yaml

创立 ingress yaml

vim tomcat-ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: tomcat
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: tomcat.cnsre.cn
    http:
      paths:
      - path: "/"
        pathType: Prefix
        backend:
          service:
            name: tomcat-service
            port:
              number: 8080

部署 tomcat ingress yaml

kubectl  apply  -f  tomcat-ingress.yaml

查看 ingress 对应节点的端口

 kubectl get svc -n ingress-nginx
NAME                                 TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)                      AGE
ingress-nginx-controller             NodePort    10.96.88.139   <none>        80:30497/TCP,443:32581/TCP   54m
ingress-nginx-controller-admission   ClusterIP   10.96.193.26   <none>        443/TCP                      54m

增加 hosts

在 hosts 文件最初追加 ingress 节点的 IP 地址

54.xxx.xxx.xxx tomcat.cnsre.cn

而后在浏览器中拜访 tomcat.cnsre.cn:30497。

应用 hostNetwork 的形式部署 ingress-nginx

每次部署 ingres-nginx 都随机一个 nodePort，而应用 ingres-nginx 拜访的时候也要以 域名: 端口 的模式去拜访如何间接应用域名去拜访呢？上面介绍另外一种装置形式。

wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.0.0/deploy/static/provider/baremetal/deploy.yaml

sed -i 's@k8s.gcr.io/ingress-nginx/controller:v1.0.0\(.*\)@willdockerhub/ingress-nginx-controller:v1.0.0@' deploy.yaml
sed -i 's@k8s.gcr.io/ingress-nginx/kube-webhook-certgen:v1.0\(.*\)$@hzde0128/kube-webhook-certgen:v1.0@' deploy.yaml

优化 ingress-nginx

应用 hostNetwork

默认 ingress-nginx 随机提供 nodeport 端口，开启 hostNetwork 启用 80、443 端口。
批改 Deployment 上面的 spec
参数如下：

...
    spec:
      hostNetwork: true # 新增
      dnsPolicy: ClusterFirst
      containers:
        - name: controller
          image: willdockerhub/ingress-nginx-controller:v1.0.0  # 更换镜像地址
          imagePullPolicy: IfNotPresent
          lifecycle:
...

批改负载平衡问题

把 kind: Deployment 改为 kind: DaemonSet 模式，这样每台 node 上都有 ingress-nginx-controller pod 正本。
参数如下：

...
# Source: ingress-nginx/templates/controller-deployment.yaml
apiVersion: apps/v1
#kind: Deployment   # 正文
kind: DaemonSet     # 新增
metadata:
  labels:
    helm.sh/chart: ingress-nginx-4.0.1
...

批改 ingressClass 问题

如果不关怀 ingressClass 或者很多没有 ingressClass 配置的 ingress 对象，
增加参数 ingress-controller --watch-ingress-without-class=true。

...
args:
  - /nginx-ingress-controller
  - --publish-service=$(POD_NAMESPACE)/ingress-nginx-dev-v1-test-controller
  - --election-id=ingress-controller-leader
  - --controller-class=k8s.io/ingress-nginx
  - --configmap=$(POD_NAMESPACE)/ingress-nginx-dev-v1-test-controller
  - --validating-webhook=:8443
  - --validating-webhook-certificate=/usr/local/certificates/cert
  - --validating-webhook-key=/usr/local/certificates/key
  - --watch-ingress-without-class=true  # 新增
...

部署查看 ingress

# 部署 
kubectl apply -f ingress-nginx.yaml
# 查看 pod 
[root@master ~]# kubectl  get  pods -n ingress-nginx  -o wide 
NAME                                   READY   STATUS      RESTARTS   AGE   IP               NODE     NOMINATED NODE   READINESS GATES
ingress-nginx-admission-create-gmnmp   0/1     Completed   0          84m   10.100.219.105   master   <none>           <none>
ingress-nginx-admission-patch-f5sgc    0/1     Completed   0          84m   10.100.219.106   master   <none>           <none>
ingress-nginx-controller-b62w7         1/1     Running     0          84m   10.0.10.51       master   <none>           <none>
ingress-nginx-controller-lsn7h         1/1     Running     0          84m   10.0.20.222      node1    <none>           <none>
# 查看端口
[root@master ~]# netstat  -pntl |grep 443 
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN      31248/nginx: master 
[root@master ~]# netstat  -pntl |grep 80        
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      31248/nginx: master

创立利用 yaml

vim tomcat.yaml
apiVersion: apps/v1 
kind: Deployment   
metadata:             
  name: tomcat-deployment     
  labels:       
    app: tomcat  
spec:          
  replicas: 2 
  selector:      
    matchLabels: 
      app: tomcat
  minReadySeconds: 1
  progressDeadlineSeconds: 60
  revisionHistoryLimit: 2
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
  template:        
    metadata:  
      labels:  
        app: tomcat
    spec:         
      containers:     
      - name: tomcat     
        image: wenlongxue/tomcat:tomcat-demo-62-8fe6052    
        imagePullPolicy: Always          
        ports:
        - containerPort: 8080
        resources:
          requests:
            memory: "2Gi"
            cpu: "80m"
          limits: 
            memory: "2Gi" 
            cpu: "80m"
        readinessProbe:
          httpGet:
            path: /
            port: 8080
          initialDelaySeconds: 180
          periodSeconds: 5
          timeoutSeconds: 3
          successThreshold: 1
          failureThreshold: 30
---
apiVersion: v1
kind: Service
metadata:      
  name: tomcat-service
  labels:      
    app: tomcat 
spec:        
  selector:   
    app: tomcat  
  ports:
  - name: tomcat-port 
    protocol: TCP      
    port: 8080         
    targetPort: 8080   
  type: ClusterIP

部署 tomcat 利用

kubectl  apply  -f  tomcat.yaml

创立 ingress yaml

vim tomcat-ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: tomcat
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: tomcat.cnsre.cn
    http:
      paths:
      - path: "/"
        pathType: Prefix
        backend:
          service:
            name: tomcat-service
            port:
              number: 8080

部署 tomcat ingress yaml

kubectl  apply  -f  tomcat-ingress.yaml

增加 hosts

在 hosts 文件最初追加 ingress 节点的 IP 地址

54.xxx.xxx.xxx tomcat.cnsre.cn

而后在浏览器中拜访 tomcat.cnsre.cn:30497。

给 ingress-nginx 配置 HTTPS 拜访

创立自签证书文件

openssl req -x509 -nodes -newkey rsa:2048 -keyout tls.key -out tls.crt -subj "/CN=nginx/O=nginx"

创立后会生成两个文件

ll tls.*
-rw-r--r--. 1 root root 1127 9 月   2 13:04 tls.crt
-rw-r--r--. 1 root root 1708 9 月   2 13:04 tls.key

创立 secret

kubectl create secret tls tls-secret --key tls.key --cert tls.crt

批改 tomcat-ingress yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: tomcat
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  tls:                      # 新增
  - hosts:                  # 新增
    - tomcat.cnsre.cn       # 新增
    secretName: tls-secret  # 新增
  rules:
  - host: tomcat.cnsre.cn
    http:
      paths:
      - path: "/"
        pathType: Prefix
        backend:
          service:
            name: tomcat-service
            port:
              number: 8080

批改完重新部署下

kubectl  apply  -f  tomcat-ingress.yaml

验证证书

拜访 tomcat.cnsre.cn

文章链接

正文完
kubernetes
发表至： kubernetes
2021-09-02
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