added k8s stub adapter for execution environment

internal/config/config.go

@@ -13,6 +13,7 @@ import (
 	"github.com/openHPI/poseidon/pkg/logging"
 	"github.com/sirupsen/logrus"
 	"gopkg.in/yaml.v3"
+	"k8s.io/client-go/rest"
 	"net/url"
 	"os"
 	"reflect"
@@ -66,6 +67,17 @@ var (
 				DNS:  nil,
 			},
 		},
+		Kubernetes: Kubernetes{
+			Enabled: false,
+			KubeConfig: rest.Config{
+				Host: "",
+				TLSClientConfig: rest.TLSClientConfig{
+					Insecure:   false,
+					ServerName: "",
+				},
+				BearerToken: "",
+			},
+		},
 		AWS: AWS{
 			Enabled:   false,
 			Endpoint:  "",
@@ -134,6 +146,11 @@ type Nomad struct {
 	Network          nomadApi.NetworkResource
 }
 
+type Kubernetes struct {
+	Enabled    bool
+	KubeConfig rest.Config
+}
+
 // URL returns the URL for the configured Nomad cluster.
 func (n *Nomad) URL() *url.URL {
 	return parseURL(n.Address, n.Port, n.TLS.Active)
@@ -179,13 +196,14 @@ type InfluxDB struct {
 
 // configuration contains the complete configuration of Poseidon.
 type configuration struct {
-	Server    server
-	Nomad     Nomad
-	AWS       AWS
-	Logger    Logger
-	Profiling Profiling
-	Sentry    sentry.ClientOptions
-	InfluxDB  InfluxDB
+	Server     server
+	Nomad      Nomad
+	Kubernetes Kubernetes
+	AWS        AWS
+	Logger     Logger
+	Profiling  Profiling
+	Sentry     sentry.ClientOptions
+	InfluxDB   InfluxDB
 }
 
 // InitConfig merges configuration options from environment variables and