k8s：ingress-controller

注意：环境信息参考专栏描述

一、收集信息

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获取 k8s 兼容的 ingress-nginx 版本：
https://github.com/kubernetes/ingress-nginx

二、部署 ingress-nginx

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# 获取 ingress-nginx 兼容版本的 chart 包
wget https://github.com/kubernetes/ingress-nginx/releases/download/helm-chart-4.0.13/ingress-nginx-4.0.13.tgz
# 根据需求修改values.yaml
sed  -i '/digest/d' values.yaml
sed -i 's/k8s.gcr.io/registry.cn-hangzhou.aliyuncs.com/' values.yaml
sed -i  's#image: ingress-nginx#image: google_containers#' values.yaml

values.yaml 改动部分
57    dnsPolicy: ClusterFirstWithHostNet
80    hostNetwork: true
182   kind: DaemonSet
280   nodeSelector:
281     kubernetes.io/os: linux
# 此处标签不加引号的话，helm install 会报错。
282     ingress: "true"
491:    type: ClusterIP

# 给需要暴露ingress-nginx的节点打标签
kubectl label node k8s-master01 ingress=true

docker pull liangjw/ingress-nginx-controller:v1.1.0
docker tag liangjw/ingress-nginx-controller:v1.1.0 registry.cn-hangzhou.aliyuncs.com/google_containers/controller:v1.1.0

# helm 部署ingress-nginx
helm upgrade --install ingress-nginx --namespace ingress-nginx --create-namespace .

# 确认pod正常启动
kubectl get pod -n ingress-nginx

三、验证测试

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# 创建测试deployment
kubectl create deployment nginx --image=nginx
# 创建测试svc
kubectl expose deployment nginx --port=80 --type=NodePort
# 创建 ingress
cat ingress-nginx.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: nginx
spec:
  ingressClassName: nginx
  rules:
    - host: example.tpaas.local
      http:
        paths:
          - backend:
              service:
                name: nginx
                port:
                  number: 80
            path: /
            pathType: Prefix
            
kubectl apply -f ingress-nginx.yaml 
# 验证能否通过ingress-nginx获取到页面内容
curl 192.168.206.110（controller所在节点IP） -H host:example.tpaas.local