Update Kubernetes v1.18.3 dependencies (#578)

Signed-off-by: 1gtm <1gtm@appscode.com>

go.mod

@@ -21,7 +21,7 @@ require (
 	k8s.io/apimachinery v0.18.5
 	k8s.io/client-go v12.0.0+incompatible
 	k8s.io/kube-openapi v0.0.0-20200410145947-61e04a5be9a6
-	kmodules.xyz/client-go v0.0.0-20200901064306-0f1faee534af
+	kmodules.xyz/client-go v0.0.0-20200903033732-dab39b86c81b
 	kmodules.xyz/crd-schema-fuzz v0.0.0-20200521005638-2433a187de95
 	kmodules.xyz/custom-resources v0.0.0-20200604135349-9e9f5c4fdba9
 	kmodules.xyz/monitoring-agent-api v0.0.0-20200828051750-42aa8e7852f3

go.sum

@@ -1255,8 +1255,8 @@ kmodules.xyz/client-go v0.0.0-20200524205059-e986bc44c91b/go.mod h1:sY/eoe4ktxZE
 kmodules.xyz/client-go v0.0.0-20200525195850-2fd180961371/go.mod h1:sY/eoe4ktxZEoHpr5NpAQ5s22VSwTE8psJtKVeVgLRY=
 kmodules.xyz/client-go v0.0.0-20200818171030-24b2ce405feb h1:0yIIoTfkhR4JAgx8UyXbP7oAveVAOcf66+D+20Uj/Uc=
 kmodules.xyz/client-go v0.0.0-20200818171030-24b2ce405feb/go.mod h1:sY/eoe4ktxZEoHpr5NpAQ5s22VSwTE8psJtKVeVgLRY=
-kmodules.xyz/client-go v0.0.0-20200901064306-0f1faee534af h1:Ly3rbfwRgQumrPnXVpdQsW2UqZiBpsEe40oik8AFNAY=
-kmodules.xyz/client-go v0.0.0-20200901064306-0f1faee534af/go.mod h1:sY/eoe4ktxZEoHpr5NpAQ5s22VSwTE8psJtKVeVgLRY=
+kmodules.xyz/client-go v0.0.0-20200903033732-dab39b86c81b h1:Erhqi9TZEqKmiIO2Lc7gX18JMH474wIJsoZ6xf//Lf0=
+kmodules.xyz/client-go v0.0.0-20200903033732-dab39b86c81b/go.mod h1:sY/eoe4ktxZEoHpr5NpAQ5s22VSwTE8psJtKVeVgLRY=
 kmodules.xyz/constants v0.0.0-20200506032633-a21e58ceec72/go.mod h1:DbiFk1bJ1KEO94t1SlAn7tzc+Zz95rSXgyUKa2nzPmY=
 kmodules.xyz/crd-schema-fuzz v0.0.0-20200521005638-2433a187de95 h1:v0S/+ftzL6Xrs9XevgchAOJyPKlRQXPiZf87xotj3X4=
 kmodules.xyz/crd-schema-fuzz v0.0.0-20200521005638-2433a187de95/go.mod h1:jpu8xFsDKd6kAWUAKk8oTu/GQGBWqhrcaDeOJdaCJnk=

vendor/kmodules.xyz/client-go/meta/incluster.go

@@ -49,6 +49,7 @@ func Namespace() string {
 }
 
 // PossiblyInCluster returns true if loading an inside-kubernetes-cluster is possible.
+// ref: https://github.com/kubernetes/kubernetes/blob/v1.18.3/staging/src/k8s.io/client-go/tools/clientcmd/client_config.go#L537
 func PossiblyInCluster() bool {
 	fi, err := os.Stat("/var/run/secrets/kubernetes.io/serviceaccount/token")
 	return os.Getenv("KUBERNETES_SERVICE_HOST") != "" &&
@@ -93,3 +94,23 @@ func APIServerCertificate(cfg *rest.Config) (*x509.Certificate, error) {
 	}
 	return nil, fmt.Errorf("no cert found")
 }
+
+func ClusterDomain() string {
+	defaultDomain := func() string {
+		if v, ok := os.LookupEnv("KUBE_CLUSTER_DOMAIN"); ok {
+			return v
+		}
+		return "cluster.local"
+	}
+
+	if !PossiblyInCluster() {
+		return defaultDomain()
+	}
+
+	const k8sService = "kubernetes.default.svc"
+	domain, err := net.LookupCNAME(k8sService)
+	if err != nil {
+		return defaultDomain()
+	}
+	return strings.Trim(strings.TrimPrefix(domain, k8sService), ".")
+}

vendor/modules.txt

@@ -851,7 +851,7 @@ k8s.io/utils/net
 k8s.io/utils/path
 k8s.io/utils/pointer
 k8s.io/utils/trace
-# kmodules.xyz/client-go v0.0.0-20200901064306-0f1faee534af
+# kmodules.xyz/client-go v0.0.0-20200903033732-dab39b86c81b
 kmodules.xyz/client-go
 kmodules.xyz/client-go/api/v1
 kmodules.xyz/client-go/apiextensions