Sort the Certificates by the secret name

Certificates for ingress rules are stored in
Kubernetes secrets. This change sorts the certs
based on the secret name they are stored in. When
selecting a certificate for a hostname the first
secret found is used.

pkg/controller/appdefinition/ingress.go

@@ -3,6 +3,7 @@ package appdefinition
 import (
 	"crypto/x509"
 	"encoding/pem"
+	"sort"
 	"strconv"
 	"strings"
 
@@ -84,15 +85,21 @@ func getCerts(namespace string, req router.Request) ([]*TLSCert, error) {
 		result = append(result, cert)
 	}
 
+	sort.Slice(result, func(i, j int) bool {
+		return result[i].SecretName < result[j].SecretName
+	})
+
 	return result, nil
 }
 
 func getCertsForPublishedHosts(rules []networkingv1.IngressRule, certs []*TLSCert) (ingressTLS []networkingv1.IngressTLS) {
 	certSecretToHostMapping := map[string][]string{}
 	for _, rule := range rules {
 		for _, cert := range certs {
+			// Find the first cert and stop looking
 			if cert.certForThisDomain(rule.Host) {
 				certSecretToHostMapping[cert.SecretName] = append(certSecretToHostMapping[cert.SecretName], rule.Host)
+				break
 			}
 		}
 	}