First Complete Working Version

template/cert-manager/cert-manager-certificate.template.yaml

@@ -2,15 +2,15 @@ apiVersion: cert-manager.io/v1
 kind: Certificate
 metadata:
     name: letsencrypt-cluster-certificate
-    namespace: portfolio
+    namespace: ${KUBE_NAMESPACE}
 spec:
     dnsNames:
-        - ${DOMAIN}
-        - ${API_DOMAIN}
+        - ${KUBE_DOMAIN}
+        - ${KUBE_API_DOMAIN}
     secretName: letsencrypt-cluster-certificate-tls
     issuerRef:
         name: cluster-certificate-issuer
         kind: ClusterIssuer
     subject:
         organizations:
-            - Hideyoshi
+            - ${KUBE_DOMAIN_ORGANIZATION}

template/cert-manager/cert-manager-issuer-dev.yaml

@@ -0,0 +1,6 @@
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+    name: cluster-certificate-issuer
+spec:
+    selfSigned: {}

template/cert-manager/cert-manager-issuer.yaml

@@ -0,0 +1,14 @@
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+    name: cluster-certificate-issuer
+spec:
+    acme:
+        server: ${KUBE_CERT_SERVER}
+        email: ${KUBE_DOMAIN_EMAIL}
+        privateKeySecretRef:
+            name: cluster-certificate-issuer
+        solvers:
+            - http01:
+                  ingress:
+                      class: nginx