kompose/pkg/transformer/kubernetes/kubernetes.go

/*
Copyright 2017 The Kubernetes Authors All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package kubernetes

import (
	"encoding/base64"
	"fmt"
	"os"
	"os/exec"
	"path"
	"path/filepath"
	"reflect"
	"regexp"
	"sort"
	"strconv"
	"strings"

	"github.com/compose-spec/compose-go/types"
	"github.com/fatih/structs"
	"github.com/kubernetes/kompose/pkg/kobject"
	"github.com/kubernetes/kompose/pkg/loader/compose"
	"github.com/kubernetes/kompose/pkg/transformer"
	"github.com/mattn/go-shellwords"
	deployapi "github.com/openshift/api/apps/v1"
	buildapi "github.com/openshift/api/build/v1"
	"github.com/pkg/errors"
	log "github.com/sirupsen/logrus"
	"github.com/spf13/cast"
	"golang.org/x/tools/godoc/util"
	appsv1 "k8s.io/api/apps/v1"
	batchv1 "k8s.io/api/batch/v1"
	api "k8s.io/api/core/v1"
	networkingv1 "k8s.io/api/networking/v1"
	"k8s.io/apimachinery/pkg/api/resource"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/util/intstr"
)

// Kubernetes implements Transformer interface and represents Kubernetes transformer
type Kubernetes struct {
	// the user provided options from the command line
	Opt kobject.ConvertOptions
}

// PVCRequestSize (Persistent Volume Claim) has default size
const PVCRequestSize = "100Mi"

// ValidVolumeSet has the different types of valid volumes
var ValidVolumeSet = map[string]struct{}{"emptyDir": {}, "hostPath": {}, "configMap": {}, "persistentVolumeClaim": {}}

const (
	// DeploymentController is controller type for Deployment
	DeploymentController = "deployment"
	// DaemonSetController is controller type for DaemonSet
	DaemonSetController = "daemonset"
	// StatefulStateController is controller type for StatefulSet
	StatefulStateController = "statefulset"
)

// CheckUnsupportedKey checks if given komposeObject contains
// keys that are not supported by this transformer.
// list of all unsupported keys are stored in unsupportedKey variable
// returns list of TODO: ....
func (k *Kubernetes) CheckUnsupportedKey(komposeObject *kobject.KomposeObject, unsupportedKey map[string]bool) []string {
	// collect all keys found in project
	var keysFound []string

	for _, serviceConfig := range komposeObject.ServiceConfigs {
		// this reflection is used in check for empty arrays
		val := reflect.ValueOf(serviceConfig)
		s := structs.New(serviceConfig)

		for _, f := range s.Fields() {
			// Check if given key is among unsupported keys, and skip it if we already saw this key
			if alreadySaw, ok := unsupportedKey[f.Name()]; ok && !alreadySaw {
				if f.IsExported() && !f.IsZero() {
					// IsZero returns false for empty array/slice ([])
					// this check if field is Slice, and then it checks its size
					if field := val.FieldByName(f.Name()); field.Kind() == reflect.Slice {
						if field.Len() == 0 {
							// array is empty it doesn't matter if it is in unsupportedKey or not
							continue
						}
					}
					//get tag from kobject service configure
					tag := f.Tag(komposeObject.LoadedFrom)
					keysFound = append(keysFound, tag)
					unsupportedKey[f.Name()] = true
				}
			}
		}
	}
	return keysFound
}

// InitPodSpec creates the pod specification
func (k *Kubernetes) InitPodSpec(name string, image string, pullSecret string) api.PodSpec {
	if image == "" {
		image = name
	}
	pod := api.PodSpec{
		Containers: []api.Container{
			{
				Name:  name,
				Image: image,
			},
		},
	}
	if pullSecret != "" {
		pod.ImagePullSecrets = []api.LocalObjectReference{
			{
				Name: pullSecret,
			},
		}
	}
	return pod
}

// InitPodSpecWithConfigMap creates the pod specification
func (k *Kubernetes) InitPodSpecWithConfigMap(name string, image string, service kobject.ServiceConfig) api.PodSpec {
	var volumeMounts []api.VolumeMount
	var volumes []api.Volume

	for _, value := range service.Configs {
		cmVolName := FormatFileName(value.Source)
		target := value.Target
		if target == "" {
			// short syntax, = /<source>
			target = "/" + value.Source
		}
		subPath := filepath.Base(target)

		volSource := api.ConfigMapVolumeSource{}
		volSource.Name = cmVolName
		key, err := service.GetConfigMapKeyFromMeta(value.Source)
		if err != nil {
			log.Warnf("cannot parse config %s , %s", value.Source, err.Error())
			// mostly it's external
			continue
		}
		volSource.Items = []api.KeyToPath{{
			Key:  key,
			Path: subPath,
		}}

		if value.Mode != nil {
			tmpMode := int32(*value.Mode)
			volSource.DefaultMode = &tmpMode
		}

		cmVol := api.Volume{
			Name:         cmVolName,
			VolumeSource: api.VolumeSource{ConfigMap: &volSource},
		}

		volumeMounts = append(volumeMounts,
			api.VolumeMount{
				Name:      cmVolName,
				MountPath: target,
				SubPath:   subPath,
			})
		volumes = append(volumes, cmVol)
	}

	pod := api.PodSpec{
		Containers: []api.Container{
			{
				Name:         name,
				Image:        image,
				VolumeMounts: volumeMounts,
			},
		},
		Volumes: volumes,
	}

	if service.ImagePullSecret != "" {
		pod.ImagePullSecrets = []api.LocalObjectReference{
			{
				Name: service.ImagePullSecret,
			},
		}
	}
	return pod
}

// InitSvc initializes Kubernetes Service object
// The created service name will = ServiceConfig.Name, but the selector may be not.
// If this service is grouped, the selector may be another name = name
func (k *Kubernetes) InitSvc(name string, service kobject.ServiceConfig) *api.Service {
	svc := &api.Service{
		TypeMeta: metav1.TypeMeta{
			Kind:       "Service",
			APIVersion: "v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:   service.Name,
			Labels: transformer.ConfigLabels(name),
		},
		// The selector uses the service.Name, which must be consistent with workloads label
		Spec: api.ServiceSpec{
			Selector: transformer.ConfigLabels(name),
		},
	}
	return svc
}

// InitConfigMapForEnv initializes a ConfigMap object
func (k *Kubernetes) InitConfigMapForEnv(name string, opt kobject.ConvertOptions, envFile string) *api.ConfigMap {
	workDir, err := transformer.GetComposeFileDir(opt.InputFiles)
	if err != nil {
		log.Fatalf("Unable to get compose file directory: %s", err)
	}
	envs, err := GetEnvsFromFile(filepath.Join(workDir, envFile))
	if err != nil {
		log.Fatalf("Unable to retrieve env file: %s", err)
	}

	// Remove root pathing
	// replace all other slashes / periods
	envName := FormatEnvName(envFile, name)

	// In order to differentiate files, we append to the name and remove '.env' if applicable from the file name
	configMap := &api.ConfigMap{
		TypeMeta: metav1.TypeMeta{
			Kind:       "ConfigMap",
			APIVersion: "v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:   envName,
			Labels: transformer.ConfigLabels(name + "-" + envName),
		},
		Data: envs,
	}

	return configMap
}

// IntiConfigMapFromFileOrDir will create a configmap from dir or file
// usage:
//  1. volume
func (k *Kubernetes) IntiConfigMapFromFileOrDir(name, cmName, filePath string, service kobject.ServiceConfig) (*api.ConfigMap, error) {
	configMap := &api.ConfigMap{
		TypeMeta: metav1.TypeMeta{
			Kind:       "ConfigMap",
			APIVersion: "v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:   cmName,
			Labels: transformer.ConfigLabels(name),
		},
	}
	dataMap := make(map[string]string)

	fi, err := os.Stat(filePath)
	if err != nil {
		return nil, err
	}

	switch mode := fi.Mode(); {
	case mode.IsDir():
		files, err := os.ReadDir(filePath)
		if err != nil {
			return nil, err
		}

		for _, file := range files {
			if !file.IsDir() {
				log.Debugf("Read file to ConfigMap: %s", file.Name())
				data, err := GetContentFromFile(filePath + "/" + file.Name())
				if err != nil {
					return nil, err
				}
				dataMap[file.Name()] = data
			}
		}
		initConfigMapData(configMap, dataMap)

	case mode.IsRegular():
		// do file stuff
		configMap = k.InitConfigMapFromFile(name, service, filePath)
		configMap.Name = cmName
		configMap.Annotations = map[string]string{
			"use-subpath": "true",
		}
	}

	return configMap, nil
}

// useSubPathMount check if a configmap should be mounted as subpath
// in this situation, this configmap will only contains 1 key in data
func useSubPathMount(cm *api.ConfigMap) bool {
	if cm.Annotations == nil {
		return false
	}
	if cm.Annotations["use-subpath"] != "true" {
		return false
	}
	return true
}

func initConfigMapData(configMap *api.ConfigMap, data map[string]string) {
	stringData := map[string]string{}
	binData := map[string][]byte{}

	for k, v := range data {
		lfText := strings.Replace(v, "\r\n", "\n", -1)
		isText := util.IsText([]byte(lfText))
		if isText {
			stringData[k] = lfText
		} else {
			binData[k] = []byte(base64.StdEncoding.EncodeToString([]byte(v)))
		}
	}

	configMap.Data = stringData
	configMap.BinaryData = binData
}

// InitConfigMapFromFile initializes a ConfigMap object
func (k *Kubernetes) InitConfigMapFromFile(name string, service kobject.ServiceConfig, fileName string) *api.ConfigMap {
	content, err := GetContentFromFile(fileName)
	if err != nil {
		log.Fatalf("Unable to retrieve file: %s", err)
	}

	configMapName := ""
	for key, tmpConfig := range service.ConfigsMetaData {
		if tmpConfig.File == fileName {
			configMapName = key
		}
	}
	configMap := &api.ConfigMap{
		TypeMeta: metav1.TypeMeta{
			Kind:       "ConfigMap",
			APIVersion: "v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:   FormatFileName(configMapName),
			Labels: transformer.ConfigLabels(name),
		},
	}

	data := map[string]string{filepath.Base(fileName): content}
	initConfigMapData(configMap, data)
	return configMap
}

// InitD initializes Kubernetes Deployment object
func (k *Kubernetes) InitD(name string, service kobject.ServiceConfig, replicas int) *appsv1.Deployment {
	var podSpec api.PodSpec
	if len(service.Configs) > 0 {
		podSpec = k.InitPodSpecWithConfigMap(name, service.Image, service)
	} else {
		podSpec = k.InitPodSpec(name, service.Image, service.ImagePullSecret)
	}

	rp := int32(replicas)

	dc := &appsv1.Deployment{
		TypeMeta: metav1.TypeMeta{
			Kind:       "Deployment",
			APIVersion: "apps/v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:   name,
			Labels: transformer.ConfigAllLabels(name, &service),
		},
		Spec: appsv1.DeploymentSpec{
			Replicas: &rp,
			Selector: &metav1.LabelSelector{
				MatchLabels: transformer.ConfigLabels(name),
			},
			Template: api.PodTemplateSpec{
				ObjectMeta: metav1.ObjectMeta{
					//Labels: transformer.ConfigLabels(name),
					Annotations: transformer.ConfigAnnotations(service),
				},
				Spec: podSpec,
			},
		},
	}
	dc.Spec.Template.Labels = transformer.ConfigLabels(name)

	update := service.GetKubernetesUpdateStrategy()
	if update != nil {
		dc.Spec.Strategy = appsv1.DeploymentStrategy{
			Type:          appsv1.RollingUpdateDeploymentStrategyType,
			RollingUpdate: update,
		}
		ms := ""
		if update.MaxSurge != nil {
			ms = update.MaxSurge.String()
		}
		mu := ""
		if update.MaxUnavailable != nil {
			mu = update.MaxUnavailable.String()
		}
		log.Debugf("Set deployment '%s' rolling update: MaxSurge: %s, MaxUnavailable: %s", name, ms, mu)
	}

	return dc
}

// InitDS initializes Kubernetes DaemonSet object
func (k *Kubernetes) InitDS(name string, service kobject.ServiceConfig) *appsv1.DaemonSet {
	ds := &appsv1.DaemonSet{
		TypeMeta: metav1.TypeMeta{
			Kind:       "DaemonSet",
			APIVersion: "apps/v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:   name,
			Labels: transformer.ConfigAllLabels(name, &service),
		},
		Spec: appsv1.DaemonSetSpec{
			Selector: &metav1.LabelSelector{
				MatchLabels: transformer.ConfigLabels(name),
			},
			Template: api.PodTemplateSpec{
				Spec: k.InitPodSpec(name, service.Image, service.ImagePullSecret),
			},
		},
	}
	return ds
}

// InitSS method initialize a stateful set
func (k *Kubernetes) InitSS(name string, service kobject.ServiceConfig, replicas int) *appsv1.StatefulSet {
	var podSpec api.PodSpec
	if len(service.Configs) > 0 {
		podSpec = k.InitPodSpecWithConfigMap(name, service.Image, service)
	} else {
		podSpec = k.InitPodSpec(name, service.Image, service.ImagePullSecret)
	}
	rp := int32(replicas)
	ds := &appsv1.StatefulSet{
		TypeMeta: metav1.TypeMeta{
			Kind:       "StatefulSet",
			APIVersion: "apps/v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:   name,
			Labels: transformer.ConfigAllLabels(name, &service),
		},
		Spec: appsv1.StatefulSetSpec{
			Replicas: &rp,
			Template: api.PodTemplateSpec{
				Spec: podSpec,
			},
			Selector: &metav1.LabelSelector{
				MatchLabels: transformer.ConfigLabels(name),
			},
			ServiceName: service.Name,
		},
	}
	return ds
}

// InitCJ initializes Kubernetes CronJob object
func (k *Kubernetes) InitCJ(name string, service kobject.ServiceConfig, schedule string, concurrencyPolicy batchv1.ConcurrencyPolicy, backoffLimit *int32) *batchv1.CronJob {
	cj := &batchv1.CronJob{
		TypeMeta: metav1.TypeMeta{
			Kind:       "CronJob",
			APIVersion: "batch/v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:   name,
			Labels: transformer.ConfigAllLabels(name, &service),
		},
		Spec: batchv1.CronJobSpec{
			Schedule:          schedule,
			ConcurrencyPolicy: concurrencyPolicy,
			JobTemplate: batchv1.JobTemplateSpec{
				Spec: batchv1.JobSpec{
					BackoffLimit: backoffLimit,
					Template: api.PodTemplateSpec{
						Spec: k.InitPodSpec(name, service.Image, service.ImagePullSecret),
					},
				},
			},
		},
	}
	return cj
}

func (k *Kubernetes) initIngress(name string, service kobject.ServiceConfig, port int32) *networkingv1.Ingress {
	hosts := regexp.MustCompile("[ ,]*,[ ,]*").Split(service.ExposeService, -1)

	ingress := &networkingv1.Ingress{
		TypeMeta: metav1.TypeMeta{
			Kind:       "Ingress",
			APIVersion: "networking.k8s.io/v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:        name,
			Labels:      transformer.ConfigLabels(name),
			Annotations: transformer.ConfigAnnotations(service),
		},
		Spec: networkingv1.IngressSpec{
			Rules: make([]networkingv1.IngressRule, len(hosts)),
		},
	}
	tlsHosts := make([]string, len(hosts))
	pathType := networkingv1.PathTypePrefix
	for i, host := range hosts {
		host, p := transformer.ParseIngressPath(host)
		if p == "" {
			p = "/"
		}
		ingress.Spec.Rules[i] = networkingv1.IngressRule{
			IngressRuleValue: networkingv1.IngressRuleValue{
				HTTP: &networkingv1.HTTPIngressRuleValue{
					Paths: []networkingv1.HTTPIngressPath{
						{
							Path:     p,
							PathType: &pathType,
							Backend: networkingv1.IngressBackend{
								Service: &networkingv1.IngressServiceBackend{
									Name: name,
									Port: networkingv1.ServiceBackendPort{
										Number: port,
									},
								},
							},
						},
					},
				},
			},
		}
		if host != "true" {
			ingress.Spec.Rules[i].Host = host
			tlsHosts[i] = host
		}
	}
	if service.ExposeServiceTLS != "" {
		if service.ExposeServiceTLS != "true" {
			ingress.Spec.TLS = []networkingv1.IngressTLS{
				{
					Hosts:      tlsHosts,
					SecretName: service.ExposeServiceTLS,
				},
			}
		} else {
			ingress.Spec.TLS = []networkingv1.IngressTLS{
				{
					Hosts: tlsHosts,
				},
			}
		}
	}

	if service.ExposeServiceIngressClassName != "" {
		ingress.Spec.IngressClassName = &service.ExposeServiceIngressClassName
	}

	return ingress
}

// CreateSecrets create secrets
func (k *Kubernetes) CreateSecrets(komposeObject kobject.KomposeObject) ([]*api.Secret, error) {
	var objects []*api.Secret
	for name, config := range komposeObject.Secrets {
		if config.File != "" {
			dataString, err := GetContentFromFile(config.File)
			if err != nil {
				log.Fatal("unable to read secret from file: ", config.File)
				return nil, err
			}
			data := []byte(dataString)
			fileName := GetFileName(config.File)
			secret := &api.Secret{
				TypeMeta: metav1.TypeMeta{
					Kind:       "Secret",
					APIVersion: "v1",
				},
				ObjectMeta: metav1.ObjectMeta{
					Name:   FormatResourceName(name),
					Labels: transformer.ConfigLabels(name),
				},
				Type: api.SecretTypeOpaque,
				Data: map[string][]byte{fileName: data},
			}
			objects = append(objects, secret)
		} else {
			log.Warnf("External secrets %s is not currently supported - ignoring", name)
		}
	}
	return objects, nil
}

// CreatePVC initializes PersistentVolumeClaim
func (k *Kubernetes) CreatePVC(name string, mode string, size string, selectorValue string, storageClassName string) (*api.PersistentVolumeClaim, error) {
	volSize, err := resource.ParseQuantity(size)
	if err != nil {
		return nil, errors.Wrap(err, "resource.ParseQuantity failed, Error parsing size")
	}

	pvc := &api.PersistentVolumeClaim{
		TypeMeta: metav1.TypeMeta{
			Kind:       "PersistentVolumeClaim",
			APIVersion: "v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:   name,
			Labels: transformer.ConfigLabels(name),
		},
		Spec: api.PersistentVolumeClaimSpec{
			Resources: api.ResourceRequirements{
				Requests: api.ResourceList{
					api.ResourceStorage: volSize,
				},
			},
		},
	}

	if len(selectorValue) > 0 {
		pvc.Spec.Selector = &metav1.LabelSelector{
			MatchLabels: transformer.ConfigLabels(selectorValue),
		}
	}

	if mode == "ro" {
		pvc.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadOnlyMany}
	} else {
		pvc.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadWriteOnce}
	}

	if len(storageClassName) > 0 {
		pvc.Spec.StorageClassName = &storageClassName
	}

	return pvc, nil
}

// ConfigPorts configures the container ports.
func ConfigPorts(service kobject.ServiceConfig) []api.ContainerPort {
	var ports []api.ContainerPort
	exist := map[string]bool{}
	for _, port := range service.Port {
		if exist[port.ID()] {
			continue
		}
		containerPort := api.ContainerPort{
			ContainerPort: port.ContainerPort,
			HostIP:        port.HostIP,
			HostPort:      port.HostPort,
			Protocol:      api.Protocol(port.Protocol),
		}
		ports = append(ports, containerPort)
		exist[port.ID()] = true
	}

	return ports
}

// ConfigLBServicePorts method configure the ports of the k8s Load Balancer Service
func (k *Kubernetes) ConfigLBServicePorts(service kobject.ServiceConfig) ([]api.ServicePort, []api.ServicePort) {
	var tcpPorts []api.ServicePort
	var udpPorts []api.ServicePort
	for _, port := range service.Port {
		if port.HostPort == 0 {
			port.HostPort = port.ContainerPort
		}
		var targetPort intstr.IntOrString
		targetPort.IntVal = port.ContainerPort
		targetPort.StrVal = strconv.Itoa(int(port.ContainerPort))

		servicePort := api.ServicePort{
			Name:       strconv.Itoa(int(port.HostPort)),
			Port:       port.HostPort,
			TargetPort: targetPort,
		}

		if protocol := api.Protocol(port.Protocol); protocol == api.ProtocolTCP {
			// If the default is already TCP, no need to include protocol.
			tcpPorts = append(tcpPorts, servicePort)
		} else {
			servicePort.Protocol = protocol
			udpPorts = append(udpPorts, servicePort)
		}
	}
	return tcpPorts, udpPorts
}

// ConfigServicePorts configure the container service ports.
func (k *Kubernetes) ConfigServicePorts(service kobject.ServiceConfig) []api.ServicePort {
	servicePorts := []api.ServicePort{}
	seenPorts := make(map[int]struct{}, len(service.Port))

	var servicePort api.ServicePort
	for _, port := range service.Port {
		if port.HostPort == 0 {
			port.HostPort = port.ContainerPort
		}

		var targetPort intstr.IntOrString
		targetPort.IntVal = port.ContainerPort
		targetPort.StrVal = strconv.Itoa(int(port.ContainerPort))

		// decide the name based on whether we saw this port before
		name := strconv.Itoa(int(port.HostPort))
		if _, ok := seenPorts[int(port.HostPort)]; ok {
			// https://github.com/kubernetes/kubernetes/issues/2995
			if service.ServiceType == string(api.ServiceTypeLoadBalancer) {
				log.Fatalf("Service %s of type LoadBalancer cannot use TCP and UDP for the same port", name)
			}
			name = fmt.Sprintf("%s-%s", name, strings.ToLower(port.Protocol))
		}

		servicePort = api.ServicePort{
			Name:       name,
			Port:       port.HostPort,
			TargetPort: targetPort,
		}

		if service.ServiceType == string(api.ServiceTypeNodePort) && service.NodePortPort != 0 {
			servicePort.NodePort = service.NodePortPort
		}

		// If the default is already TCP, no need to include protocol.
		if protocol := api.Protocol(port.Protocol); protocol != api.ProtocolTCP {
			servicePort.Protocol = protocol
		}

		servicePorts = append(servicePorts, servicePort)
		seenPorts[int(port.HostPort)] = struct{}{}
	}
	return servicePorts
}

// ConfigCapabilities configure POSIX capabilities that can be added or removed to a container
func ConfigCapabilities(service kobject.ServiceConfig) *api.Capabilities {
	capsAdd := []api.Capability{}
	capsDrop := []api.Capability{}
	for _, capAdd := range service.CapAdd {
		capsAdd = append(capsAdd, api.Capability(capAdd))
	}
	for _, capDrop := range service.CapDrop {
		capsDrop = append(capsDrop, api.Capability(capDrop))
	}
	return &api.Capabilities{
		Add:  capsAdd,
		Drop: capsDrop,
	}
}

// ConfigTmpfs configure the tmpfs.
func (k *Kubernetes) ConfigTmpfs(name string, service kobject.ServiceConfig) ([]api.VolumeMount, []api.Volume) {
	//initializing volumemounts and volumes
	volumeMounts := []api.VolumeMount{}
	volumes := []api.Volume{}

	for index, volume := range service.TmpFs {
		//naming volumes if multiple tmpfs are provided
		volumeName := fmt.Sprintf("%s-tmpfs%d", name, index)
		volume = strings.Split(volume, ":")[0]
		// create a new volume mount object and append to list
		volMount := api.VolumeMount{
			Name:      volumeName,
			MountPath: volume,
		}
		volumeMounts = append(volumeMounts, volMount)

		//create tmpfs specific empty volumes
		volSource := k.ConfigEmptyVolumeSource("tmpfs")

		// create a new volume object using the volsource and add to list
		vol := api.Volume{
			Name:         volumeName,
			VolumeSource: *volSource,
		}
		volumes = append(volumes, vol)
	}
	return volumeMounts, volumes
}

// ConfigSecretVolumes config volumes from secret.
// Link: https://docs.docker.com/compose/compose-file/#secrets
// In kubernetes' Secret resource, it has a data structure like a map[string]bytes, every key will act like the file name
// when mount to a container. This is the part that missing in compose. So we will create a single key secret from compose
// config and the key's name will be the secret's name, it's value is the file content.
// compose's secret can only be mounted at `/run/secrets`, so this will be hardcoded.
func (k *Kubernetes) ConfigSecretVolumes(name string, service kobject.ServiceConfig) ([]api.VolumeMount, []api.Volume) {
	var volumeMounts []api.VolumeMount
	var volumes []api.Volume
	if len(service.Secrets) > 0 {
		for _, secretConfig := range service.Secrets {
			if secretConfig.UID != "" {
				log.Warnf("Ignore pid in secrets for service: %s", name)
			}
			if secretConfig.GID != "" {
				log.Warnf("Ignore gid in secrets for service: %s", name)
			}

			var secretItemPath, secretMountPath, secretSubPath string
			if k.Opt.SecretsAsFiles {
				secretItemPath, secretMountPath, secretSubPath = k.getSecretPaths(secretConfig)
			} else {
				secretItemPath, secretMountPath, secretSubPath = k.getSecretPathsLegacy(secretConfig)
			}

			volSource := api.VolumeSource{
				Secret: &api.SecretVolumeSource{
					SecretName: secretConfig.Source,
					Items: []api.KeyToPath{{
						Key:  secretConfig.Source,
						Path: secretItemPath,
					}},
				},
			}

			if secretConfig.Mode != nil {
				mode := cast.ToInt32(*secretConfig.Mode)
				volSource.Secret.DefaultMode = &mode
			}

			vol := api.Volume{
				Name:         secretConfig.Source,
				VolumeSource: volSource,
			}
			volumes = append(volumes, vol)

			volMount := api.VolumeMount{
				Name:      vol.Name,
				MountPath: secretMountPath,
				SubPath:   secretSubPath,
			}
			volumeMounts = append(volumeMounts, volMount)
		}
	}
	return volumeMounts, volumes
}

func (k *Kubernetes) getSecretPaths(secretConfig types.ServiceSecretConfig) (secretItemPath, secretMountPath, secretSubPath string) {
	// Default secretConfig.Target to secretConfig.Source, just in case user was using short secret syntax or
	// otherwise did not define a specific target
	target := secretConfig.Target
	if target == "" {
		target = secretConfig.Source
	}

	// If target is an absolute path, set that as the MountPath
	if strings.HasPrefix(secretConfig.Target, "/") {
		secretMountPath = target
	} else {
		// If target is a relative path, prefix with "/run/secrets/" to replicate what docker-compose would do
		secretMountPath = "/run/secrets/" + target
	}

	// Set subPath to the target filename. this ensures that we end up with a file at our MountPath instead
	// of a directory with symlinks (see https://stackoverflow.com/a/68332231)
	splitPath := strings.Split(target, "/")
	secretFilename := splitPath[len(splitPath)-1]

	// `secretItemPath` and `secretSubPath` have to be the same as `secretFilename` to ensure we create a file with
	// that name at `secretMountPath`, instead of a directory containing a symlink to the actual file.
	secretItemPath = secretFilename
	secretSubPath = secretFilename

	return secretItemPath, secretMountPath, secretSubPath
}

func (k *Kubernetes) getSecretPathsLegacy(secretConfig types.ServiceSecretConfig) (secretItemPath, secretMountPath, secretSubPath string) {
	// The old way of setting secret paths. It resulted in files being placed in incorrect locations when compared to
	// docker-compose results, but some people might depend on this behavior so this is kept here for compatibility.
	// See https://github.com/kubernetes/kompose/issues/1280 for more details.

	var itemPath string // should be the filename
	var mountPath = ""  // should be the directory
	// if is used the short-syntax
	if secretConfig.Target == "" {
		// the secret path (mountPath) should be inside the default directory /run/secrets
		mountPath = "/run/secrets/" + secretConfig.Source
		// the itemPath should be the source itself
		itemPath = secretConfig.Source
	} else {
		// if is the long-syntax, i should get the last part of path and consider it the filename
		pathSplitted := strings.Split(secretConfig.Target, "/")
		lastPart := pathSplitted[len(pathSplitted)-1]

		// if the filename (lastPart) and the target is the same
		if lastPart == secretConfig.Target {
			// the secret path should be the source (it need to be inside a directory and only the filename was given)
			mountPath = secretConfig.Source
		} else {
			// should then get the target without the filename (lastPart)
			mountPath = mountPath + strings.TrimSuffix(secretConfig.Target, "/"+lastPart) // menos ultima parte
		}

		// if the target isn't absolute path
		if !strings.HasPrefix(secretConfig.Target, "/") {
			// concat the default secret directory
			mountPath = "/run/secrets/" + mountPath
		}

		itemPath = lastPart
	}

	secretSubPath = "" // We didn't set a SubPath in legacy behavior
	return itemPath, mountPath, ""
}

// ConfigVolumes configure the container volumes.
func (k *Kubernetes) ConfigVolumes(name string, service kobject.ServiceConfig) ([]api.VolumeMount, []api.Volume, []*api.PersistentVolumeClaim, []*api.ConfigMap, error) {
	volumeMounts := []api.VolumeMount{}
	volumes := []api.Volume{}
	var PVCs []*api.PersistentVolumeClaim
	var cms []*api.ConfigMap
	var volumeName string
	var subpathName string

	// Set a var based on if the user wants to use empty volumes
	// as opposed to persistent volumes and volume claims
	useEmptyVolumes := k.Opt.EmptyVols
	useHostPath := k.Opt.Volumes == "hostPath"
	useConfigMap := k.Opt.Volumes == "configMap"
	if k.Opt.Volumes == "emptyDir" {
		useEmptyVolumes = true
	}

	if subpath, ok := service.Labels["kompose.volume.subpath"]; ok {
		subpathName = subpath
	}

	// Override volume type if specified in service labels.
	if vt, ok := service.Labels["kompose.volume.type"]; ok {
		if _, okk := ValidVolumeSet[vt]; !okk {
			return nil, nil, nil, nil, fmt.Errorf("invalid volume type %s specified in label 'kompose.volume.type' in service %s", vt, service.Name)
		}
		useEmptyVolumes = vt == "emptyDir"
		useHostPath = vt == "hostPath"
		useConfigMap = vt == "configMap"
	}

	// config volumes from secret if present
	secretsVolumeMounts, secretsVolumes := k.ConfigSecretVolumes(name, service)
	volumeMounts = append(volumeMounts, secretsVolumeMounts...)
	volumes = append(volumes, secretsVolumes...)

	var count int
	//iterating over array of `Vols` struct as it contains all necessary information about volumes
	for _, volume := range service.Volumes {
		// check if ro/rw mode is defined, default rw
		readonly := len(volume.Mode) > 0 && volume.Mode == "ro"
		if volume.VolumeName == "" {
			if useEmptyVolumes {
				volumeName = strings.Replace(volume.PVCName, "claim", "empty", 1)
			} else if useHostPath {
				volumeName = strings.Replace(volume.PVCName, "claim", "hostpath", 1)
			} else if useConfigMap {
				volumeName = strings.Replace(volume.PVCName, "claim", "cm", 1)
			} else {
				volumeName = volume.PVCName
			}
			// to support service group bases on volume, we need use the new group name to replace the origin service name
			// in volume name. For normal service, this should have no effect
			volumeName = strings.Replace(volumeName, service.Name, name, 1)
			count++
		} else {
			volumeName = volume.VolumeName
		}
		volMount := api.VolumeMount{
			Name:      volumeName,
			ReadOnly:  readonly,
			MountPath: volume.Container,
		}

		// Get a volume source based on the type of volume we are using
		// For PVC we will also create a PVC object and add to list
		var volsource *api.VolumeSource

		if useEmptyVolumes {
			volsource = k.ConfigEmptyVolumeSource("volume")
		} else if useHostPath {
			source, err := k.ConfigHostPathVolumeSource(volume.Host)
			if err != nil {
				return nil, nil, nil, nil, errors.Wrap(err, "k.ConfigHostPathVolumeSource failed")
			}
			volsource = source
		} else if useConfigMap {
			log.Debugf("Use configmap volume")
			cm, err := k.IntiConfigMapFromFileOrDir(name, volumeName, volume.Host, service)
			if err != nil {
				return nil, nil, nil, nil, err
			}
			cms = append(cms, cm)
			volsource = k.ConfigConfigMapVolumeSource(volumeName, volume.Container, cm)

			if useSubPathMount(cm) {
				volMount.SubPath = volsource.ConfigMap.Items[0].Path
			}
		} else {
			volsource = k.ConfigPVCVolumeSource(volumeName, readonly)
			if volume.VFrom == "" {
				var storageClassName string
				defaultSize := PVCRequestSize
				if k.Opt.PVCRequestSize != "" {
					defaultSize = k.Opt.PVCRequestSize
				}
				if len(volume.PVCSize) > 0 {
					defaultSize = volume.PVCSize
				} else {
					for key, value := range service.Labels {
						if key == "kompose.volume.size" {
							defaultSize = value
						} else if key == "kompose.volume.storage-class-name" {
							storageClassName = value
						}
					}
				}

				createdPVC, err := k.CreatePVC(volumeName, volume.Mode, defaultSize, volume.SelectorValue, storageClassName)

				if err != nil {
					return nil, nil, nil, nil, errors.Wrap(err, "k.CreatePVC failed")
				}

				PVCs = append(PVCs, createdPVC)
			}
		}
		if subpathName != "" {
			volMount.SubPath = subpathName
		}
		volumeMounts = append(volumeMounts, volMount)

		// create a new volume object using the volsource and add to list
		vol := api.Volume{
			Name:         volumeName,
			VolumeSource: *volsource,
		}
		volumes = append(volumes, vol)

		if len(volume.Host) > 0 && (!useHostPath && !useConfigMap) {
			log.Warningf("Volume mount on the host %q isn't supported - ignoring path on the host", volume.Host)
		}
	}

	return volumeMounts, volumes, PVCs, cms, nil
}

// ConfigEmptyVolumeSource is helper function to create an EmptyDir api.VolumeSource
// either for Tmpfs or for emptyvolumes
func (k *Kubernetes) ConfigEmptyVolumeSource(key string) *api.VolumeSource {
	//if key is tmpfs
	if key == "tmpfs" {
		return &api.VolumeSource{
			EmptyDir: &api.EmptyDirVolumeSource{Medium: api.StorageMediumMemory},
		}
	}

	//if key is volume
	return &api.VolumeSource{
		EmptyDir: &api.EmptyDirVolumeSource{},
	}
}

// ConfigConfigMapVolumeSource config a configmap to use as volume source
func (k *Kubernetes) ConfigConfigMapVolumeSource(cmName string, targetPath string, cm *api.ConfigMap) *api.VolumeSource {
	s := api.ConfigMapVolumeSource{}
	s.Name = cmName
	if useSubPathMount(cm) {
		var keys []string
		for k := range cm.Data {
			keys = append(keys, k)
		}
		for k := range cm.BinaryData {
			keys = append(keys, k)
		}
		key := keys[0]
		_, p := path.Split(targetPath)
		s.Items = []api.KeyToPath{
			{
				Key:  key,
				Path: p,
			},
		}
	}
	return &api.VolumeSource{
		ConfigMap: &s,
	}
}

// ConfigHostPathVolumeSource is a helper function to create a HostPath api.VolumeSource
func (k *Kubernetes) ConfigHostPathVolumeSource(path string) (*api.VolumeSource, error) {
	dir, err := transformer.GetComposeFileDir(k.Opt.InputFiles)
	if err != nil {
		return nil, err
	}
	absPath := path
	if !filepath.IsAbs(path) {
		absPath = filepath.Join(dir, path)
	}

	return &api.VolumeSource{
		HostPath: &api.HostPathVolumeSource{Path: absPath},
	}, nil
}

// ConfigPVCVolumeSource is helper function to create an api.VolumeSource with a PVC
func (k *Kubernetes) ConfigPVCVolumeSource(name string, readonly bool) *api.VolumeSource {
	return &api.VolumeSource{
		PersistentVolumeClaim: &api.PersistentVolumeClaimVolumeSource{
			ClaimName: name,
			ReadOnly:  readonly,
		},
	}
}

// ConfigEnvs configures the environment variables.
func ConfigEnvs(service kobject.ServiceConfig, opt kobject.ConvertOptions) ([]api.EnvVar, error) {
	envs := transformer.EnvSort{}

	keysFromEnvFile := make(map[string]bool)

	// If there is an env_file, use ConfigMaps and ignore the environment variables
	// already specified

	if len(service.EnvFile) > 0 {
		// Load each env_file
		for _, file := range service.EnvFile {
			envName := FormatEnvName(file, service.Name)

			// Load environment variables from file
			workDir, err := transformer.GetComposeFileDir(opt.InputFiles)
			if err != nil {
				log.Fatalf("Unable to get compose file directory: %s", err)
			}
			envLoad, err := GetEnvsFromFile(filepath.Join(workDir, file))
			if err != nil {
				return envs, errors.Wrap(err, "Unable to read env_file")
			}

			// Add configMapKeyRef to each environment variable
			for k := range envLoad {
				envs = append(envs, api.EnvVar{
					Name: k,
					ValueFrom: &api.EnvVarSource{
						ConfigMapKeyRef: &api.ConfigMapKeySelector{
							LocalObjectReference: api.LocalObjectReference{
								Name: envName,
							},
							Key: k,
						}},
				})
				keysFromEnvFile[k] = true
			}
		}
	}

	// Load up the environment variables
	for _, v := range service.Environment {
		if !keysFromEnvFile[v.Name] {
			envs = append(envs, api.EnvVar{
				Name:  v.Name,
				Value: v.Value,
			})
		}
	}

	// Stable sorts data while keeping the original order of equal elements
	// we need this because envs are not populated in any random order
	// this sorting ensures they are populated in a particular order
	sort.Stable(envs)
	return envs, nil
}

// ConfigAffinity configures the Affinity.
func ConfigAffinity(service kobject.ServiceConfig) *api.Affinity {
	var affinity *api.Affinity
	// Config constraints
	// Convert constraints to requiredDuringSchedulingIgnoredDuringExecution
	positiveConstraints := configConstrains(service.Placement.PositiveConstraints, api.NodeSelectorOpIn)
	negativeConstraints := configConstrains(service.Placement.NegativeConstraints, api.NodeSelectorOpNotIn)
	if len(positiveConstraints) != 0 || len(negativeConstraints) != 0 {
		affinity = &api.Affinity{
			NodeAffinity: &api.NodeAffinity{
				RequiredDuringSchedulingIgnoredDuringExecution: &api.NodeSelector{
					NodeSelectorTerms: []api.NodeSelectorTerm{
						{
							MatchExpressions: append(positiveConstraints, negativeConstraints...),
						},
					},
				},
			},
		}
	}
	return affinity
}

// ConfigTopologySpreadConstraints configures the TopologySpreadConstraints.
func ConfigTopologySpreadConstraints(service kobject.ServiceConfig) []api.TopologySpreadConstraint {
	preferencesLen := len(service.Placement.Preferences)
	constraints := make([]api.TopologySpreadConstraint, 0, preferencesLen)

	// Placement preferences are ignored for global services
	if service.DeployMode == "global" {
		log.Warnf("Ignore placement preferences for global service %s", service.Name)
		return constraints
	}

	for i, p := range service.Placement.Preferences {
		constraints = append(constraints, api.TopologySpreadConstraint{
			// According to the order of preferences, the MaxSkew decreases in order
			// The minimum value is 1
			MaxSkew:           int32(preferencesLen - i),
			TopologyKey:       p,
			WhenUnsatisfiable: api.ScheduleAnyway,
			LabelSelector: &metav1.LabelSelector{
				MatchLabels: transformer.ConfigLabels(service.Name),
			},
		})
	}

	return constraints
}

func configConstrains(constrains map[string]string, operator api.NodeSelectorOperator) []api.NodeSelectorRequirement {
	constraintsLen := len(constrains)
	rs := make([]api.NodeSelectorRequirement, 0, constraintsLen)
	if constraintsLen == 0 {
		return rs
	}
	for k, v := range constrains {
		r := api.NodeSelectorRequirement{
			Key:      k,
			Operator: operator,
			Values:   []string{v},
		}
		rs = append(rs, r)
	}
	return rs
}

// CreateWorkloadAndConfigMapObjects generates a Kubernetes artifact for each input type service
func (k *Kubernetes) CreateWorkloadAndConfigMapObjects(name string, service kobject.ServiceConfig, opt kobject.ConvertOptions) []runtime.Object {
	var objects []runtime.Object
	var replica int

	if opt.IsReplicaSetFlag || service.Replicas == 0 {
		replica = opt.Replicas
	} else {
		replica = service.Replicas
	}

	// Check to see if Docker Compose v3 Deploy.Mode has been set to "global"
	if service.DeployMode == "global" {
		//default use daemonset
		if opt.Controller == "" {
			opt.CreateD = false
			opt.CreateDS = true
		} else if opt.Controller != "daemonset" {
			log.Warnf("Global deploy mode service is best converted to daemonset, now it convert to %s", opt.Controller)
		}
	}

	//Resolve labels first
	if val, ok := service.Labels[compose.LabelControllerType]; ok {
		opt.CreateD = false
		opt.CreateDS = false
		opt.CreateRC = false
		if opt.Controller != "" {
			log.Warnf("Use label %s type %s for service %s, ignore %s flags", compose.LabelControllerType, val, name, opt.Controller)
		}
		opt.Controller = val
	}

	if len(service.Configs) > 0 {
		objects = k.createConfigMapFromComposeConfig(name, service, objects)
	}

	if opt.CreateD || opt.Controller == DeploymentController {
		objects = append(objects, k.InitD(name, service, replica))
	}

	if opt.CreateDS || opt.Controller == DaemonSetController {
		objects = append(objects, k.InitDS(name, service))
	}

	if opt.Controller == StatefulStateController {
		objects = append(objects, k.InitSS(name, service, replica))
	}

	if len(service.EnvFile) > 0 {
		for _, envFile := range service.EnvFile {
			configMap := k.InitConfigMapForEnv(name, opt, envFile)
			objects = append(objects, configMap)
		}
	}

	return objects
}

func (k *Kubernetes) createConfigMapFromComposeConfig(name string, service kobject.ServiceConfig, objects []runtime.Object) []runtime.Object {
	for _, config := range service.Configs {
		currentConfigName := config.Source
		currentConfigObj := service.ConfigsMetaData[currentConfigName]
		if currentConfigObj.External.External {
			continue
		}
		currentFileName := currentConfigObj.File
		configMap := k.InitConfigMapFromFile(name, service, currentFileName)
		objects = append(objects, configMap)
	}
	return objects
}

// InitPod initializes Kubernetes Pod object
func (k *Kubernetes) InitPod(name string, service kobject.ServiceConfig) *api.Pod {
	pod := api.Pod{
		TypeMeta: metav1.TypeMeta{
			Kind:       "Pod",
			APIVersion: "v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:        name,
			Labels:      transformer.ConfigLabels(name),
			Annotations: transformer.ConfigAnnotations(service),
		},
		Spec: k.InitPodSpec(name, service.Image, service.ImagePullSecret),
	}
	return &pod
}

// CreateNetworkPolicy initializes Network policy
func (k *Kubernetes) CreateNetworkPolicy(networkName string) (*networkingv1.NetworkPolicy, error) {
	str := "true"
	np := &networkingv1.NetworkPolicy{
		TypeMeta: metav1.TypeMeta{
			Kind:       "NetworkPolicy",
			APIVersion: "networking.k8s.io/v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name: networkName,
			//Labels: transformer.ConfigLabels(name)(name),
		},
		Spec: networkingv1.NetworkPolicySpec{
			PodSelector: metav1.LabelSelector{
				MatchLabels: map[string]string{"io.kompose.network/" + networkName: str},
			},
			Ingress: []networkingv1.NetworkPolicyIngressRule{{
				From: []networkingv1.NetworkPolicyPeer{{
					PodSelector: &metav1.LabelSelector{
						MatchLabels: map[string]string{"io.kompose.network/" + networkName: str},
					},
				}},
			}},
		},
	}

	return np, nil
}

func buildServiceImage(opt kobject.ConvertOptions, service kobject.ServiceConfig, name string) error {
	// Must build the images before conversion (got to add service.Image in case 'image' key isn't provided
	// Check that --build is set to true
	// Check to see if there is an InputFile (required!) before we build the container
	// Check that there's actually a Build key
	// Lastly, we must have an Image name to continue

	// If the user provided a custom build it will override the docker one.
	if opt.BuildCommand != "" && opt.PushCommand != "" {
		p := shellwords.NewParser()
		p.ParseEnv = true

		buildArgs, _ := p.Parse(opt.BuildCommand)
		buildCommand := exec.Command(buildArgs[0], buildArgs[1:]...)
		err := buildCommand.Run()
		if err != nil {
			return errors.Wrap(err, "error while trying to build a custom container image")
		}

		pushArgs, _ := p.Parse(opt.PushCommand)
		pushCommand := exec.Command(pushArgs[0], pushArgs[1:]...)
		err = pushCommand.Run()
		if err != nil {
			return errors.Wrap(err, "error while trying to push a custom container image")
		}
		return nil
	}
	if opt.Build == "local" && opt.InputFiles != nil && service.Build != "" {
		// If there's no "image" key, use the name of the container that's built
		if service.Image == "" {
			service.Image = name
		}

		if service.Image == "" {
			return fmt.Errorf("image key required within build parameters in order to build and push service '%s'", name)
		}

		log.Infof("Build key detected. Attempting to build image '%s'", service.Image)

		// Build the image!
		err := transformer.BuildDockerImage(service, name)
		if err != nil {
			return errors.Wrapf(err, "Unable to build Docker image for service %v", name)
		}

		// Push the built image to the repo!
		err = transformer.PushDockerImageWithOpt(service, name, opt)
		if err != nil {
			return errors.Wrapf(err, "Unable to push Docker image for service %v", name)
		}
	}
	return nil
}

func (k *Kubernetes) configKubeServiceAndIngressForService(service kobject.ServiceConfig, name string, objects *[]runtime.Object) {
	if k.PortsExist(service) {
		if service.ServiceType == "LoadBalancer" {
			svcs := k.CreateLBService(name, service)
			for _, svc := range svcs {
				svc.Spec.ExternalTrafficPolicy = api.ServiceExternalTrafficPolicyType(service.ServiceExternalTrafficPolicy)
				*objects = append(*objects, svc)
			}
			if len(svcs) > 1 {
				log.Warningf("Create multiple service to avoid using mixed protocol in the same service when it's loadbalancer type")
			}
		} else {
			svc := k.CreateService(name, service)
			*objects = append(*objects, svc)
			if service.ExposeService != "" {
				*objects = append(*objects, k.initIngress(name, service, svc.Spec.Ports[0].Port))
			}
			if service.ServiceExternalTrafficPolicy != "" && svc.Spec.Type != api.ServiceTypeNodePort {
				log.Warningf("External Traffic Policy is ignored for the service %v of type %v", name, service.ServiceType)
			}
		}
	} else {
		if service.ServiceType == "Headless" {
			svc := k.CreateHeadlessService(name, service)
			*objects = append(*objects, svc)
			if service.ServiceExternalTrafficPolicy != "" {
				log.Warningf("External Traffic Policy is ignored for the service %v of type Headless", name)
			}
		} else {
			log.Warnf("Service %q won't be created because 'ports' is not specified", service.Name)
		}
	}
}

func (k *Kubernetes) configNetworkPolicyForService(service kobject.ServiceConfig, name string, objects *[]runtime.Object) error {
	if len(service.Network) > 0 {
		for _, net := range service.Network {
			log.Infof("Network %s is detected at Source, shall be converted to equivalent NetworkPolicy at Destination", net)
			np, err := k.CreateNetworkPolicy(net)

			if err != nil {
				return errors.Wrapf(err, "Unable to create Network Policy for network %v for service %v", net, name)
			}
			*objects = append(*objects, np)
		}
	}
	return nil
}

// Transform maps komposeObject to k8s objects
// returns object that are already sorted in the way that Services are first
func (k *Kubernetes) Transform(komposeObject kobject.KomposeObject, opt kobject.ConvertOptions) ([]runtime.Object, error) {
	// this will hold all the converted data
	var allobjects []runtime.Object

	if komposeObject.Secrets != nil {
		secrets, err := k.CreateSecrets(komposeObject)
		if err != nil {
			return nil, errors.Wrapf(err, "Unable to create Secret resource")
		}
		for _, item := range secrets {
			allobjects = append(allobjects, item)
		}
	}

	if komposeObject.Namespace != "" {
		ns := transformer.CreateNamespace(komposeObject.Namespace)
		allobjects = append(allobjects, ns)
	}

	if opt.ServiceGroupMode != "" {
		log.Debugf("Service group mode is: %s", opt.ServiceGroupMode)
		komposeObjectToServiceConfigGroupMapping := KomposeObjectToServiceConfigGroupMapping(&komposeObject, opt)
		sortedGroupMappingKeys := SortedKeys(komposeObjectToServiceConfigGroupMapping)
		for _, group := range sortedGroupMappingKeys {
			groupMapping := komposeObjectToServiceConfigGroupMapping[group]
			var objects []runtime.Object
			podSpec := PodSpec{}

			var groupName string
			// if using volume group, the name here will be a volume config string. reset to the first service name
			if opt.ServiceGroupMode == "volume" {
				if opt.ServiceGroupName != "" {
					groupName = opt.ServiceGroupName
				} else {
					var names []string
					for _, svc := range groupMapping {
						names = append(names, svc.Name)
					}
					groupName = strings.Join(names, "-")
				}
			} else {
				groupName = group
			}

			// added a container
			// ports conflict check between services
			portsUses := map[string]bool{}

			for _, service := range groupMapping {
				// first do ports check
				ports := ConfigPorts(service)
				for _, port := range ports {
					key := string(port.ContainerPort) + string(port.Protocol)
					if portsUses[key] {
						return nil, fmt.Errorf("detect ports conflict when group services, service: %s, port: %d", service.Name, port.ContainerPort)
					}
					portsUses[key] = true
				}

				log.Infof("Group Service %s to [%s]", service.Name, groupName)
				service.WithKomposeAnnotation = opt.WithKomposeAnnotation
				podSpec.Append(AddContainer(service, opt))

				if err := buildServiceImage(opt, service, service.Name); err != nil {
					return nil, err
				}
				// override..
				objects = append(objects, k.CreateWorkloadAndConfigMapObjects(groupName, service, opt)...)
				k.configKubeServiceAndIngressForService(service, groupName, &objects)

				// Configure the container volumes.
				volumesMount, volumes, pvc, cms, err := k.ConfigVolumes(groupName, service)
				if err != nil {
					return nil, errors.Wrap(err, "k.ConfigVolumes failed")
				}
				// Configure Tmpfs
				if len(service.TmpFs) > 0 {
					TmpVolumesMount, TmpVolumes := k.ConfigTmpfs(groupName, service)
					volumes = append(volumes, TmpVolumes...)
					volumesMount = append(volumesMount, TmpVolumesMount...)
				}
				podSpec.Append(
					SetVolumeMounts(volumesMount),
					SetVolumes(volumes),
				)

				// Looping on the slice pvc instead of `*objects = append(*objects, pvc...)`
				// because the type of objects and pvc is different, but when doing append
				// one element at a time it gets converted to runtime.Object for objects slice
				for _, p := range pvc {
					objects = append(objects, p)
				}

				for _, c := range cms {
					objects = append(objects, c)
				}

				podSpec.Append(
					SetPorts(service),
					ImagePullPolicy(groupName, service),
					RestartPolicy(groupName, service),
					SecurityContext(groupName, service),
					HostName(service),
					DomainName(service),
					ResourcesLimits(service),
					ResourcesRequests(service),
					TerminationGracePeriodSeconds(groupName, service),
					TopologySpreadConstraints(service),
				)

				if serviceAccountName, ok := service.Labels[compose.LabelServiceAccountName]; ok {
					podSpec.Append(ServiceAccountName(serviceAccountName))
				}

				err = k.UpdateKubernetesObjectsMultipleContainers(groupName, service, &objects, podSpec)
				if err != nil {
					return nil, errors.Wrap(err, "Error transforming Kubernetes objects")
				}

				if opt.GenerateNetworkPolicies {
					if err = k.configNetworkPolicyForService(service, service.Name, &objects); err != nil {
						return nil, err
					}
				}
			}

			allobjects = append(allobjects, objects...)
		}
	}
	sortedKeys := SortedKeys(komposeObject.ServiceConfigs)
	for _, name := range sortedKeys {
		service := komposeObject.ServiceConfigs[name]

		// if service belongs to a group, we already processed it
		if service.InGroup {
			continue
		}

		var objects []runtime.Object

		service.WithKomposeAnnotation = opt.WithKomposeAnnotation

		if err := buildServiceImage(opt, service, name); err != nil {
			return nil, err
		}

		// Generate pod or cronjob and configmap objects
		if (service.Restart == "no" || service.Restart == "on-failure") && !opt.IsPodController() {
			if service.CronJobSchedule != "" {
				log.Infof("Create kubernetes pod instead of pod controller due to restart policy: %s", service.Restart)
				cronJob := k.InitCJ(name, service, service.CronJobSchedule, service.CronJobConcurrencyPolicy, service.CronJobBackoffLimit)
				objects = append(objects, cronJob)
			} else {
				pod := k.InitPod(name, service)
				objects = append(objects, pod)
			}

			if len(service.EnvFile) > 0 {
				for _, envFile := range service.EnvFile {
					configMap := k.InitConfigMapForEnv(name, opt, envFile)
					objects = append(objects, configMap)
				}
			}
		} else {
			objects = k.CreateWorkloadAndConfigMapObjects(name, service, opt)
		}
		if opt.Controller == StatefulStateController {
			service.ServiceType = "Headless"
		}
		k.configKubeServiceAndIngressForService(service, name, &objects)
		err := k.UpdateKubernetesObjects(name, service, opt, &objects)
		if err != nil {
			return nil, errors.Wrap(err, "Error transforming Kubernetes objects")
		}
		if opt.GenerateNetworkPolicies {
			if err := k.configNetworkPolicyForService(service, name, &objects); err != nil {
				return nil, err
			}
		}
		allobjects = append(allobjects, objects...)
	}

	// sort all object so Services are first
	k.SortServicesFirst(&allobjects)
	k.RemoveDupObjects(&allobjects)

	// Only append namespaces if --namespace has been passed in
	if komposeObject.Namespace != "" {
		transformer.AssignNamespaceToObjects(&allobjects, komposeObject.Namespace)
	}
	// k.FixWorkloadVersion(&allobjects)
	return allobjects, nil
}

// UpdateController updates the given object with the given pod template update function and ObjectMeta update function
func (k *Kubernetes) UpdateController(obj runtime.Object, updateTemplate func(*api.PodTemplateSpec) error, updateMeta func(meta *metav1.ObjectMeta)) (err error) {
	switch t := obj.(type) {
	case *appsv1.Deployment:
		err = updateTemplate(&t.Spec.Template)
		if err != nil {
			return errors.Wrap(err, "updateTemplate failed")
		}
		updateMeta(&t.ObjectMeta)
	case *appsv1.DaemonSet:
		err = updateTemplate(&t.Spec.Template)
		if err != nil {
			return errors.Wrap(err, "updateTemplate failed")
		}
		updateMeta(&t.ObjectMeta)
	case *appsv1.StatefulSet:
		err = updateTemplate(&t.Spec.Template)
		if err != nil {
			return errors.Wrap(err, "updateTemplate failed")
		}
		updateMeta(&t.ObjectMeta)
	case *batchv1.CronJob:
		err = updateTemplate(&t.Spec.JobTemplate.Spec.Template)
		if err != nil {
			return errors.Wrap(err, "updateTemplate failed")
		}
		updateMeta(&t.ObjectMeta)
	case *deployapi.DeploymentConfig:
		err = updateTemplate(t.Spec.Template)
		if err != nil {
			return errors.Wrap(err, "updateTemplate failed")
		}
		updateMeta(&t.ObjectMeta)
	case *api.Pod:
		p := api.PodTemplateSpec{
			ObjectMeta: t.ObjectMeta,
			Spec:       t.Spec,
		}
		err = updateTemplate(&p)
		if err != nil {
			return errors.Wrap(err, "updateTemplate failed")
		}
		t.Spec = p.Spec
		t.ObjectMeta = p.ObjectMeta
	case *buildapi.BuildConfig:
		updateMeta(&t.ObjectMeta)
	}
	return nil
}