安裝cert-manager自動續簽k8s證書

helm 安裝cert-manager

$ kubectl create namespace cert-manager
$ helm repo add jetstack https://charts.jetstack.io
$ helm repo update
$ helm install cert-manager jetstack/cert-manager --namespace cert-manager --version v0.15.0 --set installCRDs=true

配置clusterissue

   apiVersion: cert-manager.io/v1alpha2
   kind: ClusterIssuer
   metadata:
     name: letsencrypt-prod
   spec:
     acme:
       # The ACME server URL
       server: https://acme-v02.api.letsencrypt.org/directory
       # Email address used for ACME registration
       email: [e-mail]
       # Name of a secret used to store the ACME account private key
       privateKeySecretRef:
         name: letsencrypt-prod
       # Enable the HTTP-01 challenge provider
       solvers:
       - http01:
           ingress:
             class: nginx

配置ingress

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    cert-manager.io/cluster-issuer: "letsencrypt-prod"
  name: example-ingress
  namespace: default
spec:
  rules:
  - host: a.foo.com
    http:
      paths:
      - backend:
          serviceName: a-svc
          servicePort: 80
        path: /
  - host: b.foo.com
    http:
      paths:
      - backend:
          serviceName: b-svc
          servicePort: 80
        path: /
  tls:
  - hosts:
    - a.foo.com
    secretName: a-foo-com
  - hosts:
    - b.foo.com
    secretName: b-foo-com