上次说了 traefik 的安装使用以及简单的 ingress 的配置方法,这次一起了解 ingress tls 以及 path 路径在 ingress 对象中的使用方法。
搞过网站的老铁应该都知道,有时候一些环境必须使用https,需要https就需要增加一个ssl的证书,正常的都是通过腾讯云或者阿里云上去申请,这里是学习环境我们就自己生成一个证书。
openssl req -newkey rsa:2048 -nodes -keyout tls.key -x509 -days 365 -out tls.crt
kubectl 创建一个 secret 对象来存储上面的证书
kubectl create secret generic traefik-cert --from-file=tls.crt --from-file=tls.key -n kube-system
key 和 crt 迁移到指定的目录下
mkdir /ssl
mv tls.key /ssl/
mv tls.crt /ssl/
cd /ssl
之前使用 Traefik 的默认配置,现在我们来配置 Traefik,让其支持 https
cd ~
vi traefik.toml
添加配置信息
defaultEntryPoints = ["http", "https"]
[entryPoints]
[entryPoints.http]
address = ":80"
[entryPoints.http.redirect]
entryPoint = "https"
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
[[entryPoints.https.tls.certificates]]
CertFile = "/ssl/tls.crt"
KeyFile = "/ssl/tls.key"
配置了 http 和 https 两个入口,并且配置了将 http 服务强制跳转到 https 服务,通过 traefik 进来的服务都是 https 的,要访问 https 服务,当然就得配置对应的证书了,指定了 CertFile 和 KeyFile 两个文件,可以将上面的 traefik.toml 配置文件通过一个 ConfigMap 对象挂载到 traefik pod 中去
kubectl create configmap traefik-conf --from-file=traefik.toml -n kube-system
修改traefik.yaml 文件
---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: traefik-ingress-controller
namespace: kube-system
labels:
k8s-app: traefik-ingress-lb
spec:
replicas: 1
selector:
matchLabels:
k8s-app: traefik-ingress-lb
template:
metadata:
labels:
k8s-app: traefik-ingress-lb
name: traefik-ingress-lb
spec:
serviceAccountName: traefik-ingress-controller
terminationGracePeriodSeconds: 60
volumes:
- name: ssl
secret:
secretName: traefik-cert
- name: config
configMap:
name: traefik-conf
tolerations:
- operator: "Exists"
containers:
- image: traefik
name: traefik-ingress-lb
volumeMounts:
- mountPath: "/ssl"
name: ssl
- mountPath: "/config"
name: config
ports:
- name: http
containerPort: 80
hostPort: 80
- name: https
containerPort: 443
hostPort: 443
- name: admin
containerPort: 8080
args:
- --configfile=/config/traefik.toml
- --api
- --kubernetes
- --logLevel=INFO
---
kind: Service
apiVersion: v1
metadata:
name: traefik-ingress-service
namespace: kube-system
spec:
selector:
k8s-app: traefik-ingress-lb
ports:
- protocol: TCP
port: 80
name: web
- protocol: TCP
port: 8080
name: admin
type: NodePort
运行查看效果
kubectl apply -f traefik.yaml
kubectl get pod -n kube-system
注意网上很多的文章都是直接光修改了traefik.yaml 这一块,其实我将对应的service也配置上去了,这样才生效。 https://traefik.idig8.com 本地windows配置host文件,上次说过的。
这个image 是参考网上一个大神已经打包好的,运行起来可以直接在页面打印 server Name和主机名称
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: svc1
spec:
replicas: 1
template:
metadata:
labels:
app: svc1
spec:
containers:
- name: svc1
image: cnych/example-web-service
env:
- name: APP_SVC
value: svc1
ports:
- containerPort: 8080
protocol: TCP
---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: svc2
spec:
replicas: 1
template:
metadata:
labels:
app: svc2
spec:
containers:
- name: svc2
image: cnych/example-web-service
env:
- name: APP_SVC
value: svc2
ports:
- containerPort: 8080
protocol: TCP
---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: svc3
spec:
replicas: 1
template:
metadata:
labels:
app: svc3
spec:
containers:
- name: svc3
image: cnych/example-web-service
env:
- name: APP_SVC
value: svc3
ports:
- containerPort: 8080
protocol: TCP
---
kind: Service
apiVersion: v1
metadata:
labels:
app: svc1
name: svc1
spec:
type: ClusterIP
ports:
- port: 8080
name: http
selector:
app: svc1
---
kind: Service
apiVersion: v1
metadata:
labels:
app: svc2
name: svc2
spec:
type: ClusterIP
ports:
- port: 8080
name: http
selector:
app: svc2
---
kind: Service
apiVersion: v1
metadata:
labels:
app: svc3
name: svc3
spec:
type: ClusterIP
ports:
- port: 8080
name: http
selector:
app: svc3
创建脚本
kubectl create -f backend.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: example-web-app
annotations:
kubernetes.io/ingress.class: "traefik"
spec:
rules:
- host: example.idig8.com
http:
paths:
- path: /s1
backend:
serviceName: svc1
servicePort: 8080
- path: /s2
backend:
serviceName: svc2
servicePort: 8080
- path: /
backend:
serviceName: svc3
servicePort: 8080
这里有个细节一定要注意:如果有多个path的话,根一定要放到最后(path: /),也就是上面所有都不满足的话,才执行最下面这个,如果你把根路径放到最上面的话,下面的s1和s2都没有效果了。
执行脚本
kubectl create -f example-ingress.yaml
kubectl describe ingress
直接没有在系统的命名空间下
kubectl get ingress
本地 hosts 里面给域名 example.idig8.com 添加对应的 hosts 解析
example.idig8.com/s1
example.idig8.com/s2
example.idig8.com/s3
traefik.idig8.com 查看效果
tls: - secretName: traefik-cert 单独配置吧
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: example-web-app
annotations:
kubernetes.io/ingress.class: "traefik"
spec:
tls:
- secretName: traefik-cert
rules:
- host: example.idig8.com
http:
paths:
- path: /s1
backend:
serviceName: svc1
servicePort: 8080
- path: /s2
backend:
serviceName: svc2
servicePort: 8080
- path: /
backend:
serviceName: svc3
servicePort: 8080
PS:上面就是traefik 和 path的使用方法,通过配置ingress 填写对应的规则就可以了,不是很复杂。也描述了traefik 关于https证书的使用。