feat(k8s): allow to mount tmp volume to apps

Signed-off-by: Pascal Sthamer <10992664+P4sca1@users.noreply.github.com>

functions/onprem/orborus/orborus.go

@@ -1146,6 +1146,10 @@ func deployK8sWorker(image string, identifier string, env []string) error {
 		env = append(env, fmt.Sprintf("SHUFFLE_APP_CONTAINER_SECURITY_CONTEXT=%s", appContainerSecurityContext))
 	}
 
+	if len(os.Getenv("SHUFFLE_APP_MOUNT_TMP_VOLUME")) > 0 {
+		env = append(env, fmt.Sprintf("SHUFFLE_APP_MOUNT_TMP_VOLUME=%s", os.Getenv("SHUFFLE_APP_MOUNT_TMP_VOLUME")))
+	}
+
 	if len(os.Getenv("SHUFFLE_LOGS_DISABLED")) > 0 {
 		env = append(env, fmt.Sprintf("SHUFFLE_LOGS_DISABLED=%s", os.Getenv("SHUFFLE_LOGS_DISABLED")))
 	}

functions/onprem/worker/worker.go

@@ -2,7 +2,7 @@ package main
 
 import (
 	"github.com/shuffle/shuffle-shared"
-	"github.com/shuffle/singul/pkg"
+	singul "github.com/shuffle/singul/pkg"
 
 	"bytes"
 	"context"
@@ -664,6 +664,27 @@ func deployk8sApp(image string, identifier string, env []string) error {
 		},
 	}
 
+	if os.Getenv("SHUFFLE_APP_MOUNT_TMP_VOLUME") == "true" {
+		deployment.Spec.Template.Spec.Volumes = append(
+			deployment.Spec.Template.Spec.Volumes,
+			corev1.Volume{
+				Name: "tmp",
+				VolumeSource: corev1.VolumeSource{
+					EmptyDir: &corev1.EmptyDirVolumeSource{},
+				},
+			},
+		)
+
+		deployment.Spec.Template.Spec.Containers[0].VolumeMounts = append(
+			deployment.Spec.Template.Spec.Containers[0].VolumeMounts,
+			corev1.VolumeMount{
+				Name:      "tmp",
+				ReadOnly:  false,
+				MountPath: "/tmp",
+			},
+		)
+	}
+
 	if len(os.Getenv("REGISTRY_URL")) > 0 && len(os.Getenv("SHUFFLE_BASE_IMAGE_NAME")) > 0 {
 		log.Printf("[INFO] Setting image pull policy to Always as private registry is used.")
 		//containerAttachment.ImagePullPolicy = corev1.PullAlways
@@ -3233,8 +3254,6 @@ func deploySwarmService(dockercli *dockerclient.Client, name, image string, depl
 	log.Printf("[DEBUG] Deploying service for %s to swarm on port %d", name, deployport)
 	//containerName := fmt.Sprintf("shuffle-worker-%s", parsedUuid)
 
-
-
 	// Check if the image exists or not - just in case
 	_, _, err := dockercli.ImageInspectWithRaw(context.Background(), image)
 	if err != nil {
@@ -3257,7 +3276,6 @@ func deploySwarmService(dockercli *dockerclient.Client, name, image string, depl
 		}
 	}
 
-
 	if len(baseimagename) == 0 || baseimagename == "/" {
 		baseimagename = "frikky/shuffle"
 		//var baseimagename = "frikky/shuffle"
@@ -3310,7 +3328,6 @@ func deploySwarmService(dockercli *dockerclient.Client, name, image string, depl
 		nodeCount = 1
 	}
 
-
 	replicatedJobs := uint64(replicas * nodeCount)
 	log.Printf("[DEBUG] Deploying app with name %s with image %s", name, image)
 
@@ -3472,7 +3489,6 @@ func findAppInfo(image, name string, redeploy bool) (int, error) {
 	// chance of being successful
 	time.Sleep(time.Duration(rand.Intn(1500)) * time.Millisecond)
 
-
 	highest := baseport
 	exposedPort := -1
 
@@ -3695,7 +3711,6 @@ func initSwarmNetwork() error {
 	mtu := 1500
 	options["com.docker.network.driver.mtu"] = fmt.Sprintf("%d", mtu)
 
-
 	ingressOptions := network.CreateOptions{
 		Driver:     "overlay",
 		Attachable: false,
@@ -3782,8 +3797,6 @@ func initSwarmNetwork() error {
 	return nil
 }
 
-
-
 /*** ENDREMOVE ***/
 
 func sendAppRequest(ctx context.Context, incomingUrl, appName string, port int, action *shuffle.Action, workflowExecution *shuffle.WorkflowExecution, image string, attempts int64) error {