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bootstrapping nginx ingress controller

参考

手順

構築

動作確認

nginx IngressClass が作成されていることを確認

$ kubectl describe ingressclasses nginx
Name:         nginx
Labels:       app.kubernetes.io/component=controller
              app.kubernetes.io/instance=ingress-nginx
              app.kubernetes.io/name=ingress-nginx
              app.kubernetes.io/part-of=ingress-nginx
              app.kubernetes.io/version=1.3.0
Annotations:  <none>
Controller:   k8s.io/ingress-nginx
Events:       <none>

Ingressを作成してworker nodeのIPアドレスでアクセス可能であることを確認

  1. manifestsファイル作成

    /etc/kubernetes/manifests/04_nginx_ingress_controller.yaml 
    sudo tee /etc/kubernetes/manifests/04_nginx_ingress_controller.yaml << EOF > /dev/null
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-test-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 1
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  type: NodePort
  ports:
    - name: node-port
      protocol: TCP
      port: 8080
      targetPort: 80
      nodePort: 30011
  selector:
    app: nginx
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: nginx-test-ingress
  annotations:
    external-dns.alpha.kubernetes.io/hostname: <Route53にA recordとして登録したいFQDN>
spec:
  ingressClassName: nginx
  defaultBackend:
    service:
      name: nginx-service
      port:
        number: 8080
  rules:
  - http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: nginx-service
            port:
              number: 8080
  # external-dns.alpha.kubernetes.io/hostname annotationsを指定せずrule毎に設定する例
  # - host: <Route53にA recordとして登録したいFQDN>
  #   http:
  #     paths:
  #       - path: /
  #         pathType: Prefix
  #         backend:
  #           service:
  #             name: nginx-service
  #             port:
  #               number: 8080
EOF

  2. <Route53にA recordとして登録したいFQDN> の箇所を修正する 

    sudo vim /etc/kubernetes/manifests/04_nginx_ingress_controller.yaml

  3. リソース作成 

    kubectl apply -f /etc.kubernetes/manifests/04_nginx_ingress_controller.yaml

  4. serviceでnode port(30011/TCP) で公開していることを確認 

    $ kubectl describe services nginx-service
Name:                     nginx-service
Namespace:                default
Labels:                   <none>
Annotations:              <none>
Selector:                 app=nginx
Type:                     NodePort
IP Family Policy:         SingleStack
IP Families:              IPv4
IP:                       10.32.0.145
IPs:                      10.32.0.145
Port:                     node-port  8080/TCP
TargetPort:               80/TCP
NodePort:                 node-port  30011/TCP
Endpoints:                10.200.1.184:80
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>

  5. ingressでworker nodeのIPアドレス(wlan0: 192.168.10.51) で公開していることを確認 

    $ kubectl describe ingresses nginx-test-ingress
Name:             nginx-test-ingress
Namespace:        default
Address:          192.168.10.51
Default backend:  nginx-service:8080 (10.200.1.184:80)
Rules:
  Host        Path  Backends
  ----        ----  --------
  *
              /   nginx-service:8080 (10.200.1.184:80)
Annotations:  <none>
Events:
  Type    Reason  Age                  From                      Message
  ----    ------  ----                 ----                      -------
  Normal  Sync    5m39s (x7 over 25h)  nginx-ingress-controller  Scheduled for sync

  6. MacBookProのターミナルでcurlにてアクセス可能であることを確認 

    $ curl --include http://192.168.10.51:30011/
HTTP/1.1 200 OK
Date: Tue, 21 Sep 2021 16:35:07 GMT
Content-Type: text/html
Content-Length: 612
Connection: keep-alive
Last-Modified: Tue, 04 Dec 2018 14:44:49 GMT
ETag: "5c0692e1-264"
Accept-Ranges: bytes

<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>

エラー事例