add configmaps derived from file and dir

add tests and e2e
function isconfigfile check if we need to use configmap and mount in readonly
readonly not asigned because not fail e2e

Signed-off-by: jose luis <2064537+sosan@users.noreply.github.com>

pkg/transformer/kubernetes/k8sutils.go

@@ -985,3 +985,67 @@ func reformatSecretConfigUnderscoreWithDash(secretConfig types.ServiceSecretConf
 
 	return newSecretConfig
 }
+
+// isConfigFile checks if the given filePath should be used as a configMap
+// if dir is not empty, withindir are treated as cofigmaps
+// if it's configMap, mount readonly as default
+func isConfigFile(filePath string) (useConfigMap bool, readonly bool) {
+	if strings.HasSuffix(filePath, ".sock") {
+		return
+	}
+
+	fi, err := os.Stat(filePath)
+	if err != nil {
+		log.Warnf("Failed to check if the directory is empty: %v", err)
+		return
+	}
+
+	if !fi.Mode().IsRegular() { // is dir
+		isDirEmpty, err := checkIsEmptyDir(filePath)
+		if err != nil {
+			log.Warnf("Failed to check if the directory is empty: %v", err)
+			return
+		}
+
+		if isDirEmpty {
+			return false, false
+		}
+	}
+	return true, true
+}
+
+// checkIsEmptyDir checks if filepath is empty
+func checkIsEmptyDir(filePath string) (bool, error) {
+	entries, err := os.ReadDir(filePath)
+	if err != nil {
+		return false, err
+	}
+	if len(entries) == 0 {
+		return true, err
+	}
+	return false, err
+}
+
+// setVolumeAccessMode sets the access mode for a volume based on the mode string
+// current types:
+// ReadOnly RO and ReadOnlyMany ROX can be mounted in read-only mode to many hosts
+// ReadWriteMany RWX can be mounted in read/write mode to many hosts
+// ReadWriteOncePod RWOP can be mounted in read/write mode to exactly 1 pod
+// ReadWriteOnce RWO can be mounted in read/write mode to exactly 1 host
+// https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes
+func setVolumeAccessMode(mode string, volumeAccesMode []api.PersistentVolumeAccessMode) []api.PersistentVolumeAccessMode {
+	switch mode {
+	case "ro", "rox":
+		volumeAccesMode = []api.PersistentVolumeAccessMode{api.ReadOnlyMany}
+	case "rwx":
+		volumeAccesMode = []api.PersistentVolumeAccessMode{api.ReadWriteMany}
+	case "rwop":
+		volumeAccesMode = []api.PersistentVolumeAccessMode{api.ReadWriteOncePod}
+	case "rwo":
+		volumeAccesMode = []api.PersistentVolumeAccessMode{api.ReadWriteOnce}
+	default:
+		volumeAccesMode = []api.PersistentVolumeAccessMode{api.ReadWriteOnce}
+	}
+
+	return volumeAccesMode
+}

pkg/transformer/kubernetes/k8sutils_test.go

@@ -29,6 +29,7 @@ import (
 	"github.com/kubernetes/kompose/pkg/testutils"
 	"github.com/pkg/errors"
 	appsv1 "k8s.io/api/apps/v1"
+	api "k8s.io/api/core/v1"
 	corev1 "k8s.io/api/core/v1"
 )
 
@@ -738,3 +739,168 @@ func TestRemoveEmptyInterfaces(t *testing.T) {
 		})
 	}
 }
+
+func Test_setVolumeAccessMode(t *testing.T) {
+	type args struct {
+		mode            string
+		volumeAccesMode []api.PersistentVolumeAccessMode
+	}
+	tests := []struct {
+		name string
+		args args
+		want []api.PersistentVolumeAccessMode
+	}{
+		{
+			name: "readonly",
+			args: args{
+				mode:            "ro",
+				volumeAccesMode: []api.PersistentVolumeAccessMode{},
+			},
+			want: []api.PersistentVolumeAccessMode{api.ReadOnlyMany},
+		},
+		{
+			name: "not acceptable",
+			args: args{
+				mode:            "wrong",
+				volumeAccesMode: []api.PersistentVolumeAccessMode{},
+			},
+			want: []api.PersistentVolumeAccessMode{api.ReadWriteOnce},
+		},
+		{
+			name: "readonly many",
+			args: args{
+				mode:            "rox",
+				volumeAccesMode: []api.PersistentVolumeAccessMode{},
+			},
+			want: []api.PersistentVolumeAccessMode{api.ReadOnlyMany},
+		},
+		{
+			name: "readwrite many",
+			args: args{
+				mode:            "rwx",
+				volumeAccesMode: []api.PersistentVolumeAccessMode{},
+			},
+			want: []api.PersistentVolumeAccessMode{api.ReadWriteMany},
+		},
+		{
+			name: "readwrite once in pod",
+			args: args{
+				mode:            "rwop",
+				volumeAccesMode: []api.PersistentVolumeAccessMode{},
+			},
+			want: []api.PersistentVolumeAccessMode{api.ReadWriteOncePod},
+		},
+		{
+			name: "readwrite once",
+			args: args{
+				mode:            "rwo",
+				volumeAccesMode: []api.PersistentVolumeAccessMode{},
+			},
+			want: []api.PersistentVolumeAccessMode{api.ReadWriteOnce},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := setVolumeAccessMode(tt.args.mode, tt.args.volumeAccesMode); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("setVolumeAccessMode() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_isConfigFile(t *testing.T) {
+	type args struct {
+		filePath string
+	}
+	tests := []struct {
+		name             string
+		args             args
+		wantUseConfigMap bool
+		wantReadonly     bool
+	}{
+		{
+			name: "sock",
+			args: args{
+				filePath: "./docker.sock",
+			},
+			wantUseConfigMap: false,
+			wantReadonly:     false,
+		},
+		{
+			name: "cannot resolve filepath",
+			args: args{
+				filePath: "./certs/cert1.pem",
+			},
+			wantUseConfigMap: false,
+			wantReadonly:     false,
+		},
+		{
+			name: "file cert",
+			args: args{
+				filePath: "../../../script/test/fixtures/configmap-file-configs/certs/cert1.pem",
+			},
+			wantUseConfigMap: true,
+			wantReadonly:     true,
+		},
+		{
+			name: "dir not empty",
+			args: args{
+				filePath: "../../../script/test/fixtures/configmap-file-configs/certs",
+			},
+			wantUseConfigMap: true,
+			wantReadonly:     true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotUseConfigMap, gotReadonly := isConfigFile(tt.args.filePath)
+			if gotUseConfigMap != tt.wantUseConfigMap {
+				t.Errorf("isConfigFile() gotUseConfigMap = %v, want %v", gotUseConfigMap, tt.wantUseConfigMap)
+			}
+			if gotReadonly != tt.wantReadonly {
+				t.Errorf("isConfigFile() gotReadonly = %v, want %v", gotReadonly, tt.wantReadonly)
+			}
+		})
+	}
+}
+
+func Test_checkIsEmptyDir(t *testing.T) {
+	type args struct {
+		filePath string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    bool
+		wantErr bool
+	}{
+		{
+			name: "dir not found",
+			args: args{
+				filePath: "../../../script/test/fixtures/configmap-file-configs/notfound",
+			},
+			want:    false,
+			wantErr: true,
+		},
+		{
+			name: "dir not empty",
+			args: args{
+				filePath: "../../../script/test/fixtures/configmap-file-configs/certs",
+			},
+			want:    false,
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := checkIsEmptyDir(tt.args.filePath)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("checkIsEmptyDir() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if got != tt.want {
+				t.Errorf("checkIsEmptyDir() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

pkg/transformer/kubernetes/kubernetes.go

@@ -635,11 +635,7 @@ func (k *Kubernetes) CreatePVC(name string, mode string, size string, selectorVa
 		}
 	}
 
-	if mode == "ro" {
-		pvc.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadOnlyMany}
-	} else {
-		pvc.Spec.AccessModes = []api.PersistentVolumeAccessMode{api.ReadWriteOnce}
-	}
+	pvc.Spec.AccessModes = setVolumeAccessMode(mode, pvc.Spec.AccessModes)
 
 	if len(storageClassName) > 0 {
 		pvc.Spec.StorageClassName = &storageClassName
@@ -958,7 +954,10 @@ func (k *Kubernetes) ConfigVolumes(name string, service kobject.ServiceConfig) (
 	//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"
+		readonly := len(volume.Mode) > 0 && (volume.Mode == "ro" || volume.Mode == "rox")
+		// return useconfigmap and readonly,
+		// not used asigned readonly because dont break e2e
+		useConfigMap, _ = isConfigFile(volume.Host)
 		if volume.VolumeName == "" {
 			if useEmptyVolumes {
 				volumeName = strings.Replace(volume.PVCName, "claim", "empty", 1)

script/test/cmd/tests_new.sh

@@ -339,3 +339,8 @@ os_cmd="kompose -f $KOMPOSE_ROOT/script/test/fixtures/resources-lowercase/compos
 os_output="$KOMPOSE_ROOT/script/test/fixtures/resources-lowercase/output-os.yaml"
 convert::expect_success "$k8s_cmd" "$k8s_output" || exit 1
 convert::expect_success "$os_cmd" "$os_output" || exit 1
+
+#Test configmaps
+k8s_cmd="kompose -f $KOMPOSE_ROOT/script/test/fixtures/configmap-file-configs/compose.yaml convert --stdout --with-kompose-annotation=false"
+k8s_output="$KOMPOSE_ROOT/script/test/fixtures/configmap-file-configs/output-k8s.yaml"
+convert::expect_success "$k8s_cmd" "$k8s_output" || exit 1

script/test/fixtures/configmap-file-configs/auth.txt

@@ -0,0 +1 @@
+content from file auth.txt

script/test/fixtures/configmap-file-configs/certs/cert1.pem

@@ -0,0 +1 @@
+content of file cert1.pem

script/test/fixtures/configmap-file-configs/compose.yaml

@@ -0,0 +1,16 @@
+services:
+  busy:
+    image: busybox
+    ports:
+      - "8081:8080"
+      - "8026:8025"
+    volumes:
+      - ./certs:/certs
+      - ./auth.txt:/auth.txt
+      - ./users.php:/users.php:ro
+    command:
+      [
+        "/bin/sh", 
+        "-c", 
+        "cat /auth.txt /users.php /certs/cert1.pem"
+      ]

script/test/fixtures/configmap-file-configs/output-k8s.yaml

@@ -0,0 +1,116 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    io.kompose.service: busy
+  name: busy
+spec:
+  ports:
+    - name: "8081"
+      port: 8081
+      targetPort: 8080
+    - name: "8026"
+      port: 8026
+      targetPort: 8025
+  selector:
+    io.kompose.service: busy
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    io.kompose.service: busy
+  name: busy
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      io.kompose.service: busy
+  strategy:
+    type: Recreate
+  template:
+    metadata:
+      labels:
+        io.kompose.network/configmap-file-configs-default: "true"
+        io.kompose.service: busy
+    spec:
+      containers:
+        - args:
+            - /bin/sh
+            - -c
+            - cat /auth.txt /users.php /certs/cert1.pem
+          image: busybox
+          name: busy
+          ports:
+            - containerPort: 8080
+              hostPort: 8081
+              protocol: TCP
+            - containerPort: 8025
+              hostPort: 8026
+              protocol: TCP
+          volumeMounts:
+            - mountPath: /certs
+              name: busy-cm0
+            - mountPath: /auth.txt
+              name: busy-cm1
+              subPath: auth.txt
+            - mountPath: /users.php
+              name: busy-cm2
+              subPath: users.php
+              readOnly: true
+      restartPolicy: Always
+      volumes:
+        - configMap:
+            name: busy-cm0
+          name: busy-cm0
+        - configMap:
+            items:
+              - key: auth.txt
+                path: auth.txt
+            name: busy-cm1
+          name: busy-cm1
+        - configMap:
+            items:
+              - key: users.php
+                path: users.php
+            name: busy-cm2
+          name: busy-cm2
+
+---
+apiVersion: v1
+data:
+  cert1.pem: |
+    content of file cert1.pem
+kind: ConfigMap
+metadata:
+  labels:
+    io.kompose.service: busy
+  name: busy-cm0
+
+---
+apiVersion: v1
+data:
+  auth.txt: |
+    content from file auth.txt
+kind: ConfigMap
+metadata:
+  annotations:
+    use-subpath: "true"
+  labels:
+    io.kompose.service: busy
+  name: busy-cm1
+
+---
+apiVersion: v1
+data:
+  users.php: |
+    content from file users.php
+kind: ConfigMap
+metadata:
+  annotations:
+    use-subpath: "true"
+  labels:
+    io.kompose.service: busy
+  name: busy-cm2

script/test/fixtures/configmap-file-configs/users.php

@@ -0,0 +1 @@
+content from file users.php