Feat support security fsgroup (#1613)

* feat: support security context fsgroup

Signed-off-by: AhmedGrati <ahmedgrati1999@gmail.com>

* test: add unit test to security group fsgroup

Signed-off-by: AhmedGrati <ahmedgrati1999@gmail.com>

* test: add functional test to security group fsgroup

Signed-off-by: AhmedGrati <ahmedgrati1999@gmail.com>

* docs: add documentation of the new label of security group fsgroup

Signed-off-by: AhmedGrati <ahmedgrati1999@gmail.com>

---------

Signed-off-by: AhmedGrati <ahmedgrati1999@gmail.com>

docs/user-guide.md

@@ -201,6 +201,7 @@ The currently supported options are:
 | kompose.service.healthcheck.liveness.http_get_port  | kubernetes liveness httpGet port                                                     |
 | kompose.service.healthcheck.liveness.tcp_port       | kubernetes liveness tcpSocket port                                                   |
 | kompose.service.external-traffic-policy       | 'cluster', 'local', ''                                                   |                                                |
+| kompose.security-context.fsgroup       |  kubernetes pod security group fsgroup                                                  |                                                |
 
 **Note**: `kompose.service.type` label should be defined with `ports` only (except for headless service), otherwise `kompose` will fail.
 
@@ -431,6 +432,20 @@ services:
       kompose.service.external-traffic-policy: local
       kompose.service.type: loadbalancer
 ```
+
+- `kompose.security-context.fsgroup` defines Kubernetes Pod [security context FsGroup.](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/).
+
+For example:
+
+```yaml
+version: '3.8'
+
+services:
+  pgadmin:
+    image: nginx
+    labels:
+      kompose.security-context.fsgroup: 1001
+```
 ## Restart
 
 If you want to create normal pods without controller you can use `restart` construct of docker-compose to define that. Follow table below to see what happens on the `restart` value.

pkg/kobject/kobject.go

@@ -149,6 +149,7 @@ type ServiceConfig struct {
 	Dockerfile         string             `compose:"dockerfile"`
 	Replicas           int                `compose:"replicas"`
 	GroupAdd           []int64            `compose:"group_add"`
+	FsGroup            int64              `compose:"kompose.security-context.fsgroup"`
 	Volumes            []Volumes          `compose:""`
 	Secrets            []types.ServiceSecretConfig
 	HealthChecks       HealthChecks `compose:""`

pkg/loader/compose/compose.go

@@ -705,6 +705,8 @@ func parseKomposeLabels(labels map[string]string, serviceConfig *kobject.Service
 			}
 
 			serviceConfig.ServiceExternalTrafficPolicy = serviceExternalTypeTrafficPolicy
+		case LabelSecurityContextFsGroup:
+			serviceConfig.FsGroup = cast.ToInt64(value)
 		case LabelServiceExpose:
 			serviceConfig.ExposeService = strings.Trim(strings.ToLower(value), " ,")
 		case LabelNodePortPort:

pkg/loader/compose/utils.go

@@ -79,6 +79,8 @@ const (
 
 	// ServiceTypeHeadless ...
 	ServiceTypeHeadless = "Headless"
+	// LabelSecurityContextFsGroup defines the pod FsGroup
+	LabelSecurityContextFsGroup = "kompose.security-context.fsgroup"
 )
 
 // load environment variables from compose file

pkg/transformer/kubernetes/k8sutils.go

@@ -549,6 +549,11 @@ func (k *Kubernetes) UpdateKubernetesObjects(name string, service kobject.Servic
 			podSecurityContext.SupplementalGroups = service.GroupAdd
 		}
 
+		//set Security Context FsGroup
+		if service.FsGroup != 0 {
+			podSecurityContext.FSGroup = &service.FsGroup
+		}
+
 		// Setup security context
 		securityContext := &api.SecurityContext{}
 		if service.Privileged {

pkg/transformer/kubernetes/kubernetes_test.go

@@ -51,6 +51,7 @@ func newServiceConfig() kobject.ServiceConfig {
 		VolList:         []string{"/tmp/volume"},
 		Network:         []string{"network1", "network2"}, // supported
 		Labels:          nil,
+		FsGroup:         1001,
 		Annotations:     map[string]string{"abc": "def"},
 		CPUQuota:        1, // not supported
 		CapAdd:          []string{"cap_add"},
@@ -209,6 +210,9 @@ func checkPodTemplate(config kobject.ServiceConfig, template api.PodTemplateSpec
 	if config.Privileged == privilegedNilOrFalse(template) {
 		return fmt.Errorf("Found different template privileged: %#v vs. %#v", config.Privileged, template.Spec.Containers[0].SecurityContext)
 	}
+	if config.FsGroup != *template.Spec.SecurityContext.FSGroup {
+		return fmt.Errorf("Found different pod security context fs group values: %#v vs. %#v", config.FsGroup, *template.Spec.SecurityContext.FSGroup)
+	}
 	if config.Stdin != template.Spec.Containers[0].Stdin {
 		return fmt.Errorf("Found different values for stdin: %#v vs. %#v", config.Stdin, template.Spec.Containers[0].Stdin)
 	}

pkg/transformer/kubernetes/podspec.go

@@ -128,6 +128,11 @@ func SecurityContext(name string, service kobject.ServiceConfig) PodSpecOption {
 			podSecurityContext.SupplementalGroups = service.GroupAdd
 		}
 
+		//set Pod FsGroup
+		if service.FsGroup != 0 {
+			podSecurityContext.FSGroup = &service.FsGroup
+		}
+
 		// Setup security context
 		securityContext := &api.SecurityContext{}
 		if service.Privileged {

script/test/cmd/tests_new.sh

@@ -239,3 +239,11 @@ os_cmd="kompose --provider=openshift -f $KOMPOSE_ROOT/script/test/fixtures/exter
 os_output="$KOMPOSE_ROOT/script/test/fixtures/external-traffic-policy/output-os-v2.yaml"
 convert::expect_success_and_warning "$k8s_cmd" "$k8s_output"
 convert::expect_success_and_warning "$os_cmd" "$os_output"
+
+# Test Pod security context fs group
+k8s_cmd="kompose -f $KOMPOSE_ROOT/script/test/fixtures/fsgroup/docker-compose.yaml convert --stdout --with-kompose-annotation=false"
+k8s_output="$KOMPOSE_ROOT/script/test/fixtures/fsgroup/output-k8s.yaml"
+os_cmd="kompose --provider=openshift -f $KOMPOSE_ROOT/script/test/fixtures/fsgroup/docker-compose.yaml convert --stdout --with-kompose-annotation=false"
+os_output="$KOMPOSE_ROOT/script/test/fixtures/fsgroup/output-os.yaml"
+convert::expect_success_and_warning "$k8s_cmd" "$k8s_output"
+convert::expect_success "$os_cmd" "$os_output"

script/test/fixtures/fsgroup/docker-compose.yaml

@@ -0,0 +1,14 @@
+version: '3.8'
+volumes:
+  pgadmin-data:
+
+services:
+  pgadmin:
+    labels:
+      kompose.security-context.fsgroup: 1001
+    image: dpage/pgadmin4
+    environment:
+      PGADMIN_DEFAULT_EMAIL: dumb_pgadmin_user@email.com
+      PGADMIN_DEFAULT_PASSWORD: pgadmin_password
+    volumes:
+      - pgadmin-data:/var/lib/pgadmin

script/test/fixtures/fsgroup/output-k8s.yaml

@@ -0,0 +1,79 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  annotations:
+    kompose.security-context.fsgroup: "1001"
+  creationTimestamp: null
+  labels:
+    io.kompose.service: pgadmin
+  name: pgadmin
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      io.kompose.service: pgadmin
+  strategy:
+    type: Recreate
+  template:
+    metadata:
+      annotations:
+        kompose.security-context.fsgroup: "1001"
+      creationTimestamp: null
+      labels:
+        io.kompose.network/fsgroup-default: "true"
+        io.kompose.service: pgadmin
+    spec:
+      containers:
+        - env:
+            - name: PGADMIN_DEFAULT_EMAIL
+              value: dumb_pgadmin_user@email.com
+            - name: PGADMIN_DEFAULT_PASSWORD
+              value: pgadmin_password
+          image: dpage/pgadmin4
+          name: pgadmin
+          resources: {}
+          volumeMounts:
+            - mountPath: /var/lib/pgadmin
+              name: pgadmin-data
+      restartPolicy: Always
+      securityContext:
+        fsGroup: 1001
+      volumes:
+        - name: pgadmin-data
+          persistentVolumeClaim:
+            claimName: pgadmin-data
+status: {}
+
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  creationTimestamp: null
+  labels:
+    io.kompose.service: pgadmin-data
+  name: pgadmin-data
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 100Mi
+status: {}
+
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  creationTimestamp: null
+  name: fsgroup-default
+spec:
+  ingress:
+    - from:
+        - podSelector:
+            matchLabels:
+              io.kompose.network/fsgroup-default: "true"
+  podSelector:
+    matchLabels:
+      io.kompose.network/fsgroup-default: "true"
+

script/test/fixtures/fsgroup/output-os.yaml

@@ -0,0 +1,102 @@
+---
+apiVersion: v1
+kind: DeploymentConfig
+metadata:
+  annotations:
+    kompose.security-context.fsgroup: "1001"
+  creationTimestamp: null
+  labels:
+    io.kompose.service: pgadmin
+  name: pgadmin
+spec:
+  replicas: 1
+  selector:
+    io.kompose.service: pgadmin
+  strategy:
+    resources: {}
+    type: Recreate
+  template:
+    metadata:
+      creationTimestamp: null
+      labels:
+        io.kompose.network/fsgroup-default: "true"
+        io.kompose.service: pgadmin
+    spec:
+      containers:
+        - env:
+            - name: PGADMIN_DEFAULT_EMAIL
+              value: dumb_pgadmin_user@email.com
+            - name: PGADMIN_DEFAULT_PASSWORD
+              value: pgadmin_password
+          image: ' '
+          name: pgadmin
+          resources: {}
+          volumeMounts:
+            - mountPath: /var/lib/pgadmin
+              name: pgadmin-data
+      restartPolicy: Always
+      securityContext:
+        fsGroup: 1001
+      volumes:
+        - name: pgadmin-data
+          persistentVolumeClaim:
+            claimName: pgadmin-data
+  test: false
+  triggers:
+    - type: ConfigChange
+    - imageChangeParams:
+        automatic: true
+        containerNames:
+          - pgadmin
+        from:
+          kind: ImageStreamTag
+          name: pgadmin:latest
+      type: ImageChange
+status:
+  availableReplicas: 0
+  latestVersion: 0
+  observedGeneration: 0
+  replicas: 0
+  unavailableReplicas: 0
+  updatedReplicas: 0
+
+---
+apiVersion: v1
+kind: ImageStream
+metadata:
+  creationTimestamp: null
+  labels:
+    io.kompose.service: pgadmin
+  name: pgadmin
+spec:
+  lookupPolicy:
+    local: false
+  tags:
+    - annotations: null
+      from:
+        kind: DockerImage
+        name: dpage/pgadmin4
+      generation: null
+      importPolicy: {}
+      name: latest
+      referencePolicy:
+        type: ""
+status:
+  dockerImageRepository: ""
+
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  creationTimestamp: null
+  labels:
+    io.kompose.service: pgadmin-data
+  name: pgadmin-data
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 100Mi
+status: {}
+