37、k8s-ingress-https代理--TLS传输层安全协议（证书的生成）

在上一个实验基础上进行：使用上一个实验的deployment、pod、和ingress-nginx

1、先生成证书：
    ·openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 -keyout tls.key -out tls.crt -subj "/C=CN/ST=BJ/L=BJ/O=nginx/CN=intheima.com"
    ---------------------------------------------------------------------------------------------------
    Generating a 2048 bit RSA private key
    ..........+++
    ......................................................................................................................................................................................................................................................................................................................................................+++
    writing new private key to 'tls.key'
    -----
    #-x509    通用的证书格式
    #-newkey rsa:2048 -keyout tls.key    生成一个私钥rsa 文件tls.key
    #-out tls.crt    生成crt
    -----------------------------------------------------------------------------------------------------
2、创建密钥：
    · kubectl create secret tls tls-secret --key tls.key --cert tls.crt
        #使用tls.key和tls.crt 来生成tls-secret加密证书
    -----------------------------------------
    secret/tls-secret created
    #注：TLS：传输层安全协议    与SSL差不多
    ------------------------------------------
3、创建ingress-https.yaml文件：
---------------------------------------------------------------------------------------------------
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-https
  namespace: dev
spec:
  tls:                #添加安全认证协议（TLS即传输层安全协议-是SSL的加强版）
    - hosts:
      - nginx.xiaoxin.com       #允许这两个域名使用加密证书
      - tomcat.xiaoxin.com
      secretName: tls-secret    #指定密钥-名字要和上面生成的tls名字一致

  rules:
  - host: nginx.xiaoxin.com
    http:
      paths:
      - path: /
        backend:
          serviceName: nginx-service
          servicePort: 80
  - host: tomcat.xiaoxin.com
    http:
      paths:
      - path: /
        backend:
          serviceName: tomcat-service
          servicePort: 8080
---------------------------------------------------------------------------------------------------
4、执行文件生成ingress：kubectl create -f ingress-https.yaml
5、查看生成的ingress-https：kubectl get ing ingress-https -ndev
-------------------------------------------------------------------
NAME            HOSTS                                  ADDRESS         PORTS     AGE
ingress-https   nginx.xiaoxin.com,tomcat.xiaoxin.com   10.97.145.253   80, 443   60s
------------------------------------------------------------------------------------------------
6、查看详细信息：kubectl describe ing ingress-https -ndev
------------------------------------------------------------------------------------------------
Name:             ingress-https
Namespace:        dev
Address:          10.97.145.253
Default backend:  default-http-backend:80 (<none>)
TLS:                                            #这里比http多了一个TLS 传输层安全协议
  tls-secret terminates nginx.xiaoxin.com,tomcat.xiaoxin.com
Rules:
  Host                Path  Backends
  ----                ----  --------
  nginx.xiaoxin.com
                      /   nginx-service:80 (10.244.1.11:80,10.244.1.14:80,10.244.1.15:80)
  tomcat.xiaoxin.com
                      /   tomcat-service:8080 (10.244.1.12:8080,10.244.1.13:8080,10.244.1.18:8080)
Annotations:
Events:
  Type    Reason  Age   From                      Message
  ----    ------  ----  ----                      -------
  Normal  CREATE  109s  nginx-ingress-controller  Ingress dev/ingress-https
  Normal  UPDATE  108s  nginx-ingress-controller  Ingress dev/ingress-https
------------------------------------------------------------------------------------------------------------
7、查看ingress-nginx服务给https分配的端口：
    ·kubectl get svc ingress-nginx -n ingress-nginx
    ---------------------------------------------------------------------------------------------
    NAME            TYPE       CLUSTER-IP      EXTERNAL-IP   PORT(S)                      AGE
    ingress-nginx   NodePort   10.97.145.253   <none>        80:30090/TCP,443:32457/TCP   24h
    #这里给https分配的外部访问的端口是32457
    ------------------------------------------------------------------------------------------------
8、访问：
    ·https://nginx.xiaoxin.com:32457/
    ·https://tomcat.xiaoxin.com:32457/