ingress 之https:
1，先生成自签证书

[root@centos7 ssl]# 
[root@centos7 ssl]# cat certs.sh 
cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

cat > ca-csr.json <<EOF
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

cat > sslexample.foo.com-csr.json <<EOF
{
  "CN": "sslexample.foo.com",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing"
    }
  ]
}
EOF

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes sslexample.foo.com-csr.json | cfssljson -bare sslexample.foo.com 

#kubectl create secret tls blog-ctnrs-com --cert=blog.ctnrs.com.pem --key=blog.ctnrs.com-key.pem
[root@centos7 ssl]# 
[root@centos7 ssl]# bash certs.sh 
2020/07/04 13:05:43 [INFO] generating a new CA key and certificate from CSR
2020/07/04 13:05:44 [INFO] generate received request
2020/07/04 13:05:44 [INFO] received CSR
2020/07/04 13:05:44 [INFO] generating key: rsa-2048
2020/07/04 13:05:44 [INFO] encoded CSR
2020/07/04 13:05:44 [INFO] signed certificate with serial number 652406227772555374587426115465181671602329646189
2020/07/04 13:05:44 [INFO] generate received request
2020/07/04 13:05:44 [INFO] received CSR
2020/07/04 13:05:44 [INFO] generating key: rsa-2048
2020/07/04 13:05:45 [INFO] encoded CSR
2020/07/04 13:05:45 [INFO] signed certificate with serial number 671817956048571962923463044583127144012161981371
2020/07/04 13:05:45 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@centos7 ssl]# 
[root@centos7 ssl]# ll
total 40
-rw-r--r--. 1 root root  294 Jul  4 13:05 ca-config.json
-rw-r--r--. 1 root root  960 Jul  4 13:05 ca.csr
-rw-r--r--. 1 root root  212 Jul  4 13:05 ca-csr.json
-rw-------. 1 root root 1679 Jul  4 13:05 ca-key.pem
-rw-r--r--. 1 root root 1273 Jul  4 13:05 ca.pem
-rw-r--r--. 1 root root 1112 Dec 16  2018 certs.sh
-rw-r--r--. 1 root root  968 Jul  4 13:05 sslexample.foo.com.csr
-rw-r--r--. 1 root root  191 Jul  4 13:05 sslexample.foo.com-csr.json
-rw-------. 1 root root 1675 Jul  4 13:05 sslexample.foo.com-key.pem
-rw-r--r--. 1 root root 1318 Jul  4 13:05 sslexample.foo.com.pem
[root@centos7 ssl]# 
[root@centos7 ssl]# kubectl create secret tls blog-ctnrs-com --cert=sslexample.foo.com.pem --key=sslexample.foo.com-key.pem
secret/blog-ctnrs-com created
[root@centos7 ssl]# 
[root@centos7 ssl]# 
[root@centos7 ssl]# kubectl get secret
NAME                  TYPE                                  DATA   AGE
blog-ctnrs-com        kubernetes.io/tls                     2      29s
default-token-j9jwl   kubernetes.io/service-account-token   3      12d
[root@centos7 ssl]# 
[root@centos7 ssl]# cat ingress-https.yml 
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: tls-example-ingress
spec:
  tls:
  - hosts:
    - sslexample.ctnrs.com
    secretName: blog-ctnrs-com
  rules:
    - host: sslexample.ctnrs.com
      http:
        paths:
        - path: /
          backend:
            serviceName: web
            servicePort: 80
[root@centos7 ssl]# 
[root@centos7 ssl]# 
[root@centos7 ssl]# 
[root@centos7 ssl]# kubectl get pods
NAME                   READY   STATUS    RESTARTS   AGE
web-5c987b8447-kptld   1/1     Running   0          6d22h
web-5c987b8447-nwhcd   1/1     Running   0          4d15h
web-5c987b8447-qjpz4   1/1     Running   0          4d15h
[root@centos7 ssl]# 
[root@centos7 ssl]# kubectl get svc
NAME         TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.0.0.1     <none>        443/TCP        12d
web          NodePort    10.0.0.19    <none>        80:32045/TCP   4d15h
web-1        ClusterIP   10.0.0.15    <none>        80/TCP         2d16h
[root@centos7 ssl]# 
[root@centos7 ssl]# kubectl apply -f ingress-https.yml 
ingress.networking.k8s.io/tls-example-ingress created
[root@centos7 ssl]# 

绑定hosts:
192.168.0.11 sslexample.ctnrs.com

浏览器访问：
https://sslexample.ctnrs.com