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This article introduces the relevant knowledge of "what is the method of deploying ingress-nginx in K8s". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Deploy and configure Ingress

1. Get the configuration file

# File has been downloaded to the local https://github.com/kubernetes/ingress-nginx/tree/nginx-0.20.0/deploy

2. Prepare for mirroring

Unzip ingress-nginx-nginx-0.20.0.zipcd ingress-nginx-nginx-0.20.0/deploy/vim mandatory.yaml # Collection of other files # Edit the mandatory.yaml file and change the defaultbackend image address to the image address of Ali Cloud (as shown below) image: registry.cn-hangzhou.aliyuncs.com/allinpay/defaultbackend-amd64:v1.5

3. Installation

Kubectl apply-f mandatory.yaml

# wait a moment and query kubectl get namespacekubectl get pods-n ingress-nginx using the following command

4. Create backend pod and service (pod-B, service-B)

Vim deploy-demo.yamlapiVersion: v1kind: Servicemetadata: name: myapp namespace: defaultspec: selector: app: myapp release: canary ports:-name: http targetPort: 80 port: 80 UV-apiVersion: apps/v1kind: Deploymentmetadata: name: myapp-deploy namespace: defaultspec: replicas: 3 selector: matchLabels: app: myapp release: canary template: metadata: labels: app: myapp release: canary spec: Containers:-name: myapp image: ikubernetes/myapp:v2 ports:-name: http containerPort: 8 applications configure kubectl apply-f deploy-demo.yaml# View kubectl get pods

5. Create service-A

Vim service-nodeport.yamlapiVersion: v1kind: Servicemetadata: name: ingress-nginx namespace: ingress-nginx labels: app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/ part-of: ingress-nginxspec: type: NodePort ports:-name: http port: 80 targetPort: 80 protocol: TCP nodePort: 30080-name: https port: 443 targetPort: 443 protocol: TCP nodePort: 30443 selector: app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/ Part-of: ingress-nginx# App configuration kubectl apply-f service-nodeport.yaml# View kubectl get svc-n ingress-nginx

Access: ip:30080 in an external browser

The reason for reporting an error at this time is that no ingress rule associated with ingress-controller to service-B has been generated

6. Define ingress rules

Define ingress rules, during which rules are automatically injected into the nginx.conf of ingress-controller (pod)

Ingress-controller is directly related to service-B, but ingress generates various rules in the middle.

Vim ingress-myapp.yamlapiVersion: extensions/v1beta1kind: Ingressmetadata: name: ingress-myapp namespace: default annotations: kubernetes.io/ingress.class: "nginx" spec: rules:-host: myapp.magedu.com http: paths:-path: backend: serviceName: myapp servicePort: 80

At this point, the nginx.conf of ingress-controller will automatically generate a configuration of server segment, that is, a field of virtual host of nginx, including upstream configuration, etc.

Upstream automatically proxies to backend pod (pod-B), which are automatically generated, so automatically generate configuration, automatically change configuration, etc.

You just need to change this yaml file

# Application configuration kubectl apply-f ingress-myapp.yaml

Configure host files on external hosts

Then visit it in the browser and find that you can already access the back-end pod.

Second, use https

1. Create a K8s certificate (note that the same namespace is used as the backend pod)

Kubectl-n default create secret tls ingress-test-key / home/centos/cert/cash532.key-cert/ home/centos/cert/cash532.crt

2. Create ingress rules

Pay attention to the similarity of namespace, otherwise the certificate will not be valid

Vim ingress-myapp-cash532.yamlapiVersion: extensions/v1beta1kind: Ingressmetadata: name: ingress-myapp namespace: default annotations: kubernetes.io/ingress.class: "nginx" kubernetes.io/secure-backends: "true" kubernetes.io/ssl-passthrough: "true" spec: tls:-hosts:-myapp.cash532.xyz secretName: ingress-test rules:-host: myapp.cash532.xyz http: paths:-path: Backend: serviceName: myapp servicePort: 8 applications configuration kubectl apply-f ingress-myapp-cash532.yaml

Browser access

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