EKS の LoadBalancerController で http → https のリダイレクト

やりたいこと

EKS の LoadBalancerController で http を https にリダイレクトさせたい

よくある方法

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  namespace: default
  name: ingress
  annotations:
    kubernetes.io/ingress.class: alb
    alb.ingress.kubernetes.io/certificate-arn: arn:aws:acm:us-west-2:xxxx:certificate/xxxxxx
    alb.ingress.kubernetes.io/listen-ports: '[{"HTTP": 80}, {"HTTPS":443}]'
    alb.ingress.kubernetes.io/actions.ssl-redirect: '{"Type": "redirect", "RedirectConfig": { "Protocol": "HTTPS", "Port": "443", "StatusCode": "HTTP_301"}}'
spec:
  rules:
    - http:
        paths:
         - path: /*
           backend:
             serviceName: ssl-redirect
             servicePort: use-annotation
         - path: /*
           backend:
             serviceName: default-service
             servicePort: 80

いまいちな設定になる。

簡潔な方法

アノテーション alb.ingress.kubernetes.io/ssl-redirect　を使う
https://kubernetes-sigs.github.io/aws-load-balancer-controller/v2.2/guide/ingress/annotations/

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  namespace: default
  name: ingress
  annotations:
    kubernetes.io/ingress.class: alb
    alb.ingress.kubernetes.io/certificate-arn: arn:aws:acm:us-west-2:xxxx:certificate/xxxxxx
    alb.ingress.kubernetes.io/listen-ports: '[{"HTTP": 80}, {"HTTPS":443}]'
    alb.ingress.kubernetes.io/ssl-redirect: "443"
spec:
  rules:
    - http:
        paths:
         - path: /*
           backend:
             serviceName: default-service
             servicePort: 80

デフォルトアクションとして扱ってくれる。いいね！