traefik https配置

轉自：https://blog.csdn.net/lusyoe/article/details/81298231

在kubernetes中使用traefik暴露服務，添加https支持

使用購買的證書或者私簽證書

私簽證書：

# 私鑰
openssl genrsa -out rsa_private_key.pem 2048

# 生成公鑰
openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem

openssl req -new -out ca-req.csr -key rsa_private_key.pem

openssl x509 -req -in ca-req.csr -out ca-cert.pem -signkey rsa_private_key.pem -days 3650

traefik配置

購買證書的traefik.toml文件：

apiVersion: v1
kind: ConfigMap
metadata:
  name: traefik-conf
  namespace: kube-system
data:
  traefik.toml: |
    defaultEntryPoints = ["http","https"]
    [entryPoints]
      [entryPoints.http]
       address = ":80"
       compress = true
         [entryPoints.http.redirect]
          entryPoint = "https"
      [entryPoints.https]
       address = ":443"
       compress = true
         [entryPoints.https.tls]
           [[entryPoints.https.tls.certificates]]
           certFile = "/ssl/tls.crt"
           keyFile = "/ssl/tls.key

注： 其中tls.crt和tls.key就是證書文件，注意必須要改爲這個文件名，否則會報錯

[entryPoints.http.redirect]  entryPoint = "https" 的配置是把入口爲http的訪問強制轉爲https. 

可以用其他方式實現：將配置文件中的[entryPoints.http.redirect] entryPoint = "https" 去掉，在ingress的annotations中配置：ingress.kubernetes.io/ssl-redirect: "true" 。就可以將入口爲http的訪問強制轉爲https。

私簽證書配置：

apiVersion: v1
kind: ConfigMap
metadata:
  name: traefik-conf
  namespace: kube-system
data:
  traefik.toml: |
    defaultEntryPoints = ["http","https"]
    [entryPoints]
      [entryPoints.http]
       address = ":80"
       compress = true
         [entryPoints.http.redirect]
          entryPoint = "https"
      [entryPoints.https]
       address = ":443"
       compress = true
         [entryPoints.https.tls]
           [[entryPoints.https.tls.certificates]]
           certFile = "/ssl/ca-cert.pem"
           keyFile = "/ssl/rsa_private_key.pem

創建configmap

kubectl create -f traefik-configmap.yaml

Traefik secret 配置

購買證書：

kubectl create secret tls traefik-cert --key tls.key --cert tls.crt -n kube-system

私簽證書：

kubectl create secret generic traefik-cert --from-file=rsa_private_key.pem --from-file=ca-cert.pem -n kube-system

注：由於secret是不能跨命名空間的，如果應用是部署在default命名空間，那還需要在default命名空間創建一個該secret，去掉上面最後面的-n kube-system即可

k8s traefik部署配置

添加traefik-ingress.yaml文件

---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: traefik-ingress-controller
rules:
  - apiGroups:
      - ""
    resources:
      - pods
      - services
      - endpoints
      - secrets
    verbs:
      - get
      - list
      - watch
  - apiGroups:
      - extensions
    resources:
      - ingresses
    verbs:
      - get
      - list
      - watch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: traefik-ingress-controller
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: traefik-ingress-controller
subjects:
- kind: ServiceAccount
  name: traefik-ingress-controller
  namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: traefik-ingress-controller
  namespace: kube-system
---
kind: Deployment
apiVersion: apps/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
      containers:
      - image: traefik:v1.6
        imagePullPolicy: IfNotPresent
        name: traefik-ingress-lb
        volumeMounts:
        - mountPath: "/ssl"
          name: "ssl"
        - mountPath: "/config"
          name: "config"
        ports:
        - containerPort: 80
        - containerPort: 443
        args:
        - --web
        - --kubernetes
        - --configfile=/config/traefik.toml
---
kind: Service
apiVersion: v1
metadata:
  name: traefik-ingress-service
  namespace: kube-system
spec:
  selector:
    k8s-app: traefik-ingress-lb
  ports:
    - protocol: TCP
      # 該端口爲 traefik ingress-controller的服務端口
      port: 80
      # 集羣hosts文件中設置的 NODE_PORT_RANGE 作爲 NodePort的可用範圍
      # 從默認20000~40000之間選一個可用端口，讓ingress-controller暴露給外部的訪問
      nodePort: 80
      name: web
    - protocol: TCP
      # 該端口爲 traefik 的管理WEB界面
      port: 8080
      name: admin
    - protocol: TCP
      port: 443
      nodePort: 443
      name: https
  type: NodePort

注： https配置同樣適用於deamon-set的形式

traefik-ssl-ds.yaml

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: traefik-ingress-controller
  namespace: kube-system
---
kind: DaemonSet
apiVersion: extensions/v1beta1
metadata:
  name: traefik-ingress-controller
  namespace: kube-system
  labels:
    k8s-app: traefik-ingress-lb
spec:
  template:
    metadata:
      labels:
        k8s-app: traefik-ingress-lb
        name: traefik-ingress-lb
    spec:
      serviceAccountName: traefik-ingress-controller
      terminationGracePeriodSeconds: 60
      containers:
      - image: traefik
        name: traefik-ingress-lb
        ports:
        - name: http
          containerPort: 80
          hostPort: 80
        - name: admin
          containerPort: 8080
          hostPort: 8580
        - name: https
          containerPort: 443
          hostPort: 443
        securityContext:
          capabilities:
            drop:
            - ALL
            add:
            - NET_BIND_SERVICE
        args:
        - --api
        - --kubernetes
        - --logLevel=INFO
        - --configfile=/config/traefik.toml
        - --web
        volumeMounts:
        - mountPath: "/ssl"
          name: "ssl"
        - mountPath: "/config"
          name: "config"
      volumes:
      - name: ssl
        secret:
          secretName: traefik-cert
      - name: config
        configMap:
          name: traefik-conf
---
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
    - protocol: TCP
      port: 8443
      name: https

ingress 配置：

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: k8s-example
  annotations:
    kubernetes.io/ingress.class: "traefik"
spec:
  tls:
  - secretName: traefik-cert
  rules:
  - host: k8s-example.luhaoyuan.com
    http:
      paths:
      - backend:
          serviceName: k8s-example
          servicePort: k8s-backend

spec下面多了tls的配置，secretName爲之前新建的secret名。