kubernetes（二十四）ingress https

ingress https

ingress-nginx-controller 对应的版本是V1.0.0

openssl-ingress https

生成自签名证书和私钥

openssl req -x509 -nodes -days 3650 -newkey ras:2048 -keyout tls-key.pem -out tls-cert.pem -subj "/CN=mcsastest.com.cn"

生成tls secret

kubectl create secret tls test-tls --cert=tls-cert.pem --key=tls-key.pem

ingress追加配置

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: test-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  ingressClassName: nginx
  tls:
  - hosts:
      - mcsastest.com.cn
    secretName: test-tls
  rules:
    - host: mcsastest.com.cn
      http:
        paths:
          - path: /test1
            pathType: Prefix
            backend:
              service:
                name: nginx
                port:
                  number: 80

执行完后查看 ingress-controller日志，报错

 Unexpected error validating SSL certificate "default/test-tls" for server "mcsastest.com.cn": x509: certificate relies on legacy Common Name field, use SANs instead

openssl生成SANS的证书方式
命令行
 配置文件

个人比较熟悉cfssl，下面采用cfssl生成：

cfssl-ingress https

ca-ingress-config.json

{
  "signing": {
    "default": {
      "expiry": "876000h"
    },
    "profiles": {
      "ingress": {
        "usages": [
            "server auth",
            "client auth"
        ],
        "expiry": "876000h"
      }
    }
  }
}

ca-ingress-csr.json

{
  "CN": "ingress",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "JS",
      "L": "NJ",
      "O": "ingress",
      "OU": "ingress"
    }
  ],
  "ca": {
    "expiry": "876000h"
  }
}

生成根证书

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

ingress-csr.json

{
  "CN": "mcsastest.com.cn",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "JS",
      "L": "NJ",
      "O": "falcon",
      "OU": "nginx.test"
    }
  ]
}

生成ingress 用证书

cfssl gencert  \
	-ca=ca-ingress.pem   \
	-ca-key=ca-ingress-key.pem   \
	-config=ca-ingress-config.json   \
	-hostname=192.168.0.110,localhost,mcsastest.com.cn   \
	-profile=ingress   ingress-csr.json | cfssljson -bare tls

生成tls secret

kubectl create secret tls test-tls --cert=tls.pem --key=tls-key.pem

查看生成的证书

cfssl-certinfo -cert=tls.pem
{
  "subject": {
    "common_name": "mcsastest.com.cn",
    "country": "CN",
    "organization": "falcon",
    "organizational_unit": "nginx.test",
    "locality": "NJ",
    "province": "JS",
    "names": [
      "CN",
      "JS",
      "NJ",
      "falcon",
      "nginx.test",
      "mcsastest.com.cn"
    ]
  },
  "issuer": {
    "common_name": "ingress",
    "country": "CN",
    "organization": "falcon",
    "organizational_unit": "falcon",
    "locality": "NJ",
    "province": "JS",
    "names": [
      "CN",
      "JS",
      "NJ",
      "falcon",
      "falcon",
      "ingress"
    ]
  },
  "serial_number": "129893924529548302690018454605660077012693905699",
  "sans": [
    "localhost",
    "mcsastest.com.cn",
    "192.168.0.110"
  ],
  "not_before": "2021-11-18T01:52:00Z",
  "not_after": "2121-10-25T01:52:00Z",
  "sigalg": "SHA256WithRSA",
  "authority_key_id": "55:08:29:3D:EC:7E:2F:DE:BA:B6:C6:CB:12:14:D9:C3:36:8A:A0:9B",
  "subject_key_id": "A1:FF:92:52:43:AC:27:52:5C:11:5C:2E:2D:37:BA:2A:0E:1C:54:79",
  "pem": "-----BEGIN CERTIFICATE-----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\nErh0qXVF\n-----END CERTIFICATE-----\n"
}

生成的证书中有了sans属性

生成tls secret

kubectl create secret tls test-tls --cert=tls-cert.pem --key=tls-key.pem

ingress追加配置

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: test-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  ingressClassName: nginx
  tls:
  - hosts:
      - mcsastest.com.cn
    secretName: test-tls
  rules:
    - host: mcsastest.com.cn
      http:
        paths:
          - path: /test1
            pathType: Prefix
            backend:
              service:
                name: nginx
                port:
                  number: 80

重新启动后，ssl配置正确

I1118 06:09:31.150376       7 backend_ssl.go:66] "Adding secret to local store" name="default/test-tls"
I1118 06:09:31.150718       7 controller.go:150] "Configuration changes detected, backend reload required"
I1118 06:09:31.219582       7 controller.go:167] "Backend successfully reloaded"
I1118 06:09:31.219870       7 event.go:282] Event(v1.ObjectReference{Kind:"Pod", Namespace:"ingress-nginx", Name:"ingress-nginx-controller-55f74b4f85-w72hf", UID:"73fe36ea-aec2-4039-bc1a-77de84181298", APIVersion:"v1", ResourceVersion:"8003802", FieldPath:""}): type: 'Normal' reason: 'RELOAD' NGINX reload triggered due to a change in configuration
I1118 06:09:45.762996       7 status.go:284] "updating Ingress status" namespace="default" ingress="test-ingress" currentValue=[] newValue=[{IP:192.168.0.110 Hostname: Ports:[]}]
I1118 06:09:45.769930       7 event.go:282] Event(v1.ObjectReference{Kind:"Ingress", Namespace:"default", Name:"test-ingress", UID:"341bc44c-440b-4d5d-ae7a-4714e6c81725", APIVersion:"networking.k8s.io/v1", ResourceVersion:"8035260", FieldPath:""}): type: 'Normal' reason: 'Sync' Scheduled for sync

访问

未导入ca时浏览器访问

新版本的chrome，在ca没有被信任前不允许再访问

浏览器导入证书（mac下操作，在钥匙串中追加证书)

选择【登录】，菜单项中点击【文件】->【导入项目】
直接导入的【ca】，这样，用这个ca签名的其他证书也会被浏览器信任
双击导入的【ca】，将信任修改成【始终信任】

再次浏览器访问

问题

执行curl出现下面的错

ssl received a record that exceeded the maximum permissible length

经过检查，发现是用https访问了ingress-controller对应service的http端口30371造成的,换成31534就正常了

ingress-nginx-controller             NodePort    10.97.51.229    <none>        80:30371/TCP,443:31534/TCP   3h25m