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K8S Ingress/Ingress Controller

介紹

Ingress

定義規則

Ingress 是 K8s 所提供的工具，用在定義應用程式如何公開服務

Ingress Controller

實現規則與分流

Ingress Controller 負責監聽 Ingress 管理路由 Nginx 等,Ingress Controller 會根據 Ingress Controler 分配流量到應用程式

實作

建立 Ingress

手上有三個 service

  1. efk-elasticsearch-client
  2. efk-kibana
  3. hl
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    apiVersion: networking.k8s.io/v1
    kind: Ingress
    metadata:
      name: ingress
      annotations:
        kubernetes.io/ingress.class: "traefik"
        traefik.ingress.kubernetes.io/frontend-entry-points: http,https
        #traefik.ingress.kubernetes.io/redirect-entry-point: https
        #traefik.ingress.kubernetes.io/redirect-permanent: "true"
    spec:
      ingressClassName: traefik
      rules:
        - http:
            paths:
            - path: /es
              pathType: Prefix
              backend:
                service:
                  name: efk-elasticsearch-client
                  port:
                    number: 9200
            - path: /kb
              pathType: Prefix
              backend:
                service:
                  name: efk-kibana
                  port:
                    number: 443
            - path: /
              pathType: Exact
              backend:
                service:
                  name: hl
                  port:
                    number: 8080


建立 Ingress Controller

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kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.5.1/deploy/static/provider/cloud/deploy.yaml

一旦更新或刪除 Ingress 資源，Nginx Ingress Controller 會自動響應並相應地更新或刪除相關的路由規則。

參考資料

  • [Kubernetes / K8s]Ingress 和 Ingress Controller 差別
  • Kubernetes - Ingress
  • GitHub marcel-dempers/docker-development-youtube-series