Kubernetes安装ingress-controller

IngressController

1. 安装

1.1 查看ingress-nginx的版本匹配

https://github.com/kubernetes/ingress-nginx/blob/main/README.md#readme

下载配置

wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.1.2/deploy/static/provider/cloud/deploy.yaml

docker pull xyz349925756/ingress-nginx-controller:v1.0.5

查找出使用的镜像

grep image deploy.yaml

替换镜像为国内可以下载的镜像

原始：

image: k8s.gcr.io/ingress-nginx/controller:v1.1.2@sha256:0bc88eb15f9e7f84e8e56c14fa5735aaa488b840983f87bd79b1054190e660de

替换：

image: docker.io/liangjw/ingress-nginx-controller:v1.1.2

原始

image: k8s.gcr.io/ingress-nginx/kube-webhook-certgen:v1.1.1@sha256:64d8c73dca984af206adf9d6d7e46aa550362b1d7a01f3a0a91b20cc67868660

替换

image: docker.io/liangjw/kube-webhook-certgen:v1.1.1

安装

kubectl apply -f deploy.yaml

2 使用NodeProt暴露

https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.1.1/deploy/static/provider/baremetal/deploy.yaml

3 使用HostProt的方式去暴露

先来给其中一个工作节点打一label

[root@node-2 ~]# kubectl get node
NAME     STATUS   ROLES    AGE   VERSION
node-2   Ready    <none>   29h   v1.20.2
node-3   Ready    <none>   29h   v1.20.2
[root@node-2 ~]# kubectl label node node-3 app=ingress
node/node-3 labeled

修改Deployment下的配置，让其变成hostPost模式，且选择刚刚打标签的node部署

4 ingress demo

#deploy
apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-demo
spec:
  selector:
    matchLabels:
      app: tomcat-demo
  replicas: 1
  template:
    metadata:
      labels:
        app: tomcat-demo
    spec:
      containers:
      - name: tomcat-demo
        image: registry.cn-hangzhou.aliyuncs.com/liuyi01/tomcat:8.0.51-alpine
        ports:
        - containerPort: 8080
---
#service
apiVersion: v1
kind: Service
metadata:
  name: tomcat-demo
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 8080
  selector:
    app: tomcat-demo

---
#ingress
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: tomcat-demo
spec:
  ingressClassName: nginx
  rules:
  - host: tomcat.mooc.com
    http:
      paths:
      - path: /
        backend:
          serviceName: tomcat-demo
          servicePort: 80

新版本的ingress需要加上 ingressClassName 不然ingress无法发现服务
参考: https://blog.csdn.net/Hello_worId/article/details/123602379

先复制

vim ingress-demo.yaml
:set paste
insert
shift + insert
:wq

不出意外的出现了意外情况。

百度下发现是因为我装了好几次的ingress-controller，但是又没有把东西删干净

https://blog.csdn.net/qq_39218530/article/details/115372879

使用下面的命令查看 webhook

kubectl get validatingwebhookconfigurations
ingress-nginx-admission

删除ingress-nginx-admission

kubectl delete -A ValidatingWebhookConfiguration ingress-nginx-admission