ingress controller学习记录（2）

摘要：出来的是的欢迎页面使网站支持协议制作证书和私钥创建证书和私钥这个证书不能直接被的使用，需要转成后，才能被注入到中，被使用。访问发现可以访问。

编辑 ingress-tomcat.yaml， 文件内容如下：

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-tomcat
  namespace: default
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: tomcat.test.com
    http:
      paths:
      - path:
        backend:
          serviceName: tomcat
          servicePort: 8080

tomcat-deploy.yaml 内容如下：

apiVersion: v1
kind: Service
metadata:
  name: tomcat
  namespace: default
spec:
  selector:
    app: tomcat
    release: canary
  ports:
  - name: http
    targetPort: 8080
    port: 8080
  - name: ajp
    targetPort: 8009
    port: 8009
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-deploy
  namespace: default
spec:
  replicas: 3
  selector: 
    matchLabels:
      app: tomcat
      release: canary
  template:
    metadata:
      labels:
        app: tomcat
        release: canary
    spec:
      containers:
      - name: tomcat
        image: tomcat:8.5.32-jre8-alpine
        ports: 
        - name: http
          containerPort: 8080
        - name: ajp
          containerPort: 8009

按如下命令创建ingress-tomcat

[root@master ingress-nginx]# kubectl apply -f tomcat-deploy.yaml 
service/tomcat created
deployment.apps/tomcat-deploy created
[root@master ingress-nginx]# kubectl apply -f ingress-tomcat.yaml 
ingress.extensions/ingress-tomcat created
[root@master ingress-nginx]# kubectl get ingress
NAME             HOSTS             ADDRESS   PORTS     AGE
ingress-tomcat   tomcat.test.com             80        6s

此时，修改本地hosts解析后，就可以访问tomcat.test.com:30080地址了。出来的是tomcat的欢迎页面

创建证书和私钥

[root@master ingress-nginx]# openssl genrsa -out tls.key 2048 
Generating RSA private key, 2048 bit long modulus
......................................+++
......+++
e is 65537 (0x10001)
[root@master ingress-nginx]# openssl req -new -x509 -key tls.key -out tls.crt -subj /C=CN/ST=Hangzhou/L=Hangzhou/O=kubernetes/CN=tomcat.test.com
[root@master ingress-nginx]# ls tls*
tls.crt  tls.key

这个证书不能直接被ingress的nginx使用，需要转成secret后，才能被注入到nginx中，被ingress使用。

[root@master ingress-nginx]# kubectl create secret tls tomcat-ingress-secret --cert tls.crt --key=tls.key
secret/tomcat-ingress-secret created
[root@master ingress-nginx]# kubectl get secret
NAME                    TYPE                                  DATA      AGE
default-token-qcfxf     kubernetes.io/service-account-token   3         8d
tomcat-ingress-secret   kubernetes.io/tls                     2         7s
[root@master ingress-nginx]# kubectl describe secret tomcat-ingress-secret
Name:         tomcat-ingress-secret
Namespace:    default
Labels:       
Annotations:  

Type:  kubernetes.io/tls

Data
====
tls.crt:  1306 bytes
tls.key:  1679 bytes

编辑 ingress-tomcat-tls.yaml 文件，内容如下：

在yaml文件中添加了secret的相关信息：

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-tomcat-tls
  namespace: default
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  tls:
  - hosts:
    - tomcat.test.com
    secretName: tomcat-ingress-secret
  rules:
  - host: tomcat.test.com
    http:
      paths:
      - path:
        backend:
          serviceName: tomcat
          servicePort: 8080

[root@master ingress-nginx]# kubectl apply -f ingress-tomcat-tls.yaml 
ingress.extensions/ingress-tomcat-tls created
[root@master ingress-nginx]# kubectl get ingress
NAME                 HOSTS             ADDRESS   PORTS     AGE
ingress-tomcat       tomcat.test.com             80        17m
ingress-tomcat-tls   tomcat.test.com             80, 443   8s

然后去查看ingress-controller上的nginx配置文件

[root@master ingress-nginx]# kubectl get pods -n ingress-nginx
NAME                                        READY     STATUS    RESTARTS   AGE
default-http-backend-6586bc58b6-4f6qm       1/1       Running   1          8h
nginx-ingress-controller-7675fd6cdb-njvdb   1/1       Running   1          8h
[root@master ingress-nginx]# kubectl exec -n ingress-nginx nginx-ingress-controller-7675fd6cdb-njvdb -it -- /bin/sh
$ cat nginx.conf|grep secret
        ssl_certificate                         /etc/ingress-controller/ssl/default-tomcat-ingress-secret.pem;
        ssl_certificate_key                     /etc/ingress-controller/ssl/default-tomcat-ingress-secret.pem;
        ssl_trusted_certificate                 /etc/ingress-controller/ssl/default-tomcat-ingress-secret-full-chain.pem;
$ 

发现，secret的相关信息，已经被注入到了ingress-controller的nginx配置之中。

访问https://tomcat.test.com:80443 发现可以访问。