使用 traefik 配置 https ingress
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本文档基于 traefik 配置 https ingress 规则,请先阅读配置基本 ingress。与基本 ingress-controller 相比,需要额外配置 https tls 证书,主要步骤如下:
1.准备 tls 证书
可以使用Let's Encrypt签发的免费证书,这里为了测试方便使用自签证书 (tls.key/tls.crt),注意CN 配置为 ingress 的域名:
$ openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout tls.key -out tls.crt -subj "/CN=hello.test.com"
2.在 kube-system 命名空间创建 secret: traefik-cert,以便后面 traefik-controller 挂载该证书
$ kubectl -n kube-system create secret tls traefik-cert --key=tls.key --cert=tls.crt
3.创建 traefik-controller,增加 traefik.toml 配置文件及https 端口暴露等,详见该 yaml 文件
$ kubectl apply -f /etc/ansible/manifests/ingress/traefik/tls/traefik-controller.yaml
4.创建 https ingress 例子
# 创建示例应用
$ kubectl run test-hello --image=nginx:alpine --port=80 --expose
# hello-tls-ingress 示例
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
name: hello-tls-ingress
annotations:
kubernetes.io/ingress.class: traefik
spec:
rules:
- host: hello.test.com
http:
paths:
- backend:
serviceName: test-hello
servicePort: 80
tls:
- secretName: traefik-cert
# 创建https ingress
$ kubectl apply -f /etc/ansible/manifests/ingress/traefik/tls/hello-tls.ing.yaml
# 注意根据hello示例,需要在default命名空间创建对应的secret: traefik-cert
$ kubectl create secret tls traefik-cert --key=tls.key --cert=tls.crt
5.验证 https 访问
验证 traefik-ingress svc
$ kubectl get svc -n kube-system traefik-ingress-service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
traefik-ingress-service NodePort 10.68.250.253 <none> 80:23456/TCP,443:23457/TCP,8080:35941/TCP 66m
可以看到项目默认使用nodePort 23456暴露traefik 80端口,nodePort 23457暴露 traefik 443端口,因此在客户端 hosts 增加记录 $Node_IP hello.test.com
之后,可以在浏览器验证访问如下:
https://hello.test.com:23457
如果你已经配置了转发 ingress nodePort,那么增加对应 hosts记录后,可以验证访问 https://hello.test.com
配置 dashboard ingress
前提1:k8s 集群的dashboard 已安装
$ kubectl get svc -n kube-system | grep dashboard
kubernetes-dashboard NodePort 10.68.211.168 <none> 443:39308/TCP 3d11h
前提2:/etc/ansible/manifests/ingress/traefik/tls/traefik-controller.yaml
的配置文件traefik.toml
开启了insecureSkipVerify = true
配置 dashboard ingress:kubectl apply -f /etc/ansible/manifests/ingress/traefik/tls/k8s-dashboard.ing.yaml
内容如下:
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
name: kubernetes-dashboard
namespace: kube-system
annotations:
traefik.ingress.kubernetes.io/redirect-entry-point: https
spec:
rules:
- host: dashboard.test.com
http:
paths:
- path: /
backend:
serviceName: kubernetes-dashboard
servicePort: 443
- 注意annotations 配置了 http 跳转 https 功能
- 注意后端服务是443端口