feat: support pv/pvc metadata in subDir parameter

refine

Author: andyzhangx

charts/latest/csi-driver-smb-v1.8.0.tgz

@@ -57,6 +57,7 @@ spec:
             - "--csi-address=$(ADDRESS)"
             - "--leader-election"
             - "--leader-election-namespace={{ .Release.Namespace }}"
+            - "--extra-create-metadata=true"
           env:
             - name: ADDRESS
               value: /csi/csi.sock

charts/latest/csi-driver-smb/templates/csi-smb-controller.yaml

@@ -37,6 +37,7 @@ spec:
             - "--csi-address=$(ADDRESS)"
             - "--leader-election"
             - "--leader-election-namespace=kube-system"
+            - "--extra-create-metadata=true"
           env:
             - name: ADDRESS
               value: /csi/csi.sock

deploy/csi-smb-controller.yaml

@@ -28,6 +28,12 @@ kubectl create secret generic smbcreds --from-literal username=USERNAME --from-l
 ```
 
 ### Tips
+#### `subDir` parameter supports following pv/pvc metadata transform
+> if `subDir` value contains following string, it would transforms into corresponding pv/pvc name or namespace
+ - `${pvc.metadata.name}`
+ - `${pvc.metadata.namespace}`
+ - `${pv.metadata.name}`
+
 #### provide `mountOptions` for `DeleteVolume`
 > since `DeleteVolumeRequest` does not provide `mountOptions`, following is the workaround to provide `mountOptions` for `DeleteVolume`
   - create a secret `smbcreds` with `mountOptions`

docs/driver-parameters.md

@@ -302,6 +302,7 @@ func getInternalMountPath(workingMountDir string, vol *smbVolume) string {
 // Convert VolumeCreate parameters to an smbVolume
 func newSMBVolume(name string, size int64, params map[string]string) (*smbVolume, error) {
 	var source, subDir string
+	subDirReplaceMap := map[string]string{}
 
 	// validate parameters (case-insensitive).
 	for k, v := range params {
@@ -310,6 +311,12 @@ func newSMBVolume(name string, size int64, params map[string]string) (*smbVolume
 			source = v
 		case subDirField:
 			subDir = v
+		case pvcNamespaceKey:
+			subDirReplaceMap[pvcNamespaceMetadata] = v
+		case pvcNameKey:
+			subDirReplaceMap[pvcNameMetadata] = v
+		case pvNameKey:
+			subDirReplaceMap[pvNameMetadata] = v
 		default:
 			return nil, fmt.Errorf("invalid parameter %s in storage class", k)
 		}
@@ -327,7 +334,8 @@ func newSMBVolume(name string, size int64, params map[string]string) (*smbVolume
 		// use pv name by default if not specified
 		vol.subDir = name
 	} else {
-		vol.subDir = subDir
+		// replace pv/pvc name namespace metadata in subDir
+		vol.subDir = replaceWithMap(subDir, subDirReplaceMap)
 		// make volume id unique if subDir is provided
 		vol.uuid = name
 	}

pkg/smb/controllerserver.go

@@ -130,12 +130,19 @@ func (d *Driver) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRe
 	gidPresent := checkGidPresentInMountFlags(mountFlags)
 
 	var source, subDir string
+	subDirReplaceMap := map[string]string{}
 	for k, v := range context {
 		switch strings.ToLower(k) {
 		case sourceField:
 			source = v
 		case subDirField:
 			subDir = v
+		case pvcNamespaceKey:
+			subDirReplaceMap[pvcNamespaceMetadata] = v
+		case pvcNameKey:
+			subDirReplaceMap[pvcNameMetadata] = v
+		case pvNameKey:
+			subDirReplaceMap[pvNameMetadata] = v
 		}
 	}
 
@@ -205,6 +212,9 @@ func (d *Driver) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRe
 			return nil, fmt.Errorf("prepare stage path failed for %s with error: %v", targetPath, err)
 		}
 		if subDir != "" {
+			// replace pv/pvc name namespace metadata in subDir
+			subDir = replaceWithMap(subDir, subDirReplaceMap)
+
 			source = strings.TrimRight(source, "/")
 			source = fmt.Sprintf("%s/%s", source, subDir)
 		}

pkg/smb/nodeserver.go

@@ -29,14 +29,20 @@ import (
 )
 
 const (
-	DefaultDriverName = "smb.csi.k8s.io"
-	usernameField     = "username"
-	passwordField     = "password"
-	sourceField       = "source"
-	subDirField       = "subdir"
-	domainField       = "domain"
-	mountOptionsField = "mountoptions"
-	defaultDomainName = "AZURE"
+	DefaultDriverName    = "smb.csi.k8s.io"
+	usernameField        = "username"
+	passwordField        = "password"
+	sourceField          = "source"
+	subDirField          = "subdir"
+	domainField          = "domain"
+	mountOptionsField    = "mountoptions"
+	defaultDomainName    = "AZURE"
+	pvcNameKey           = "csi.storage.k8s.io/pvc/name"
+	pvcNamespaceKey      = "csi.storage.k8s.io/pvc/namespace"
+	pvNameKey            = "csi.storage.k8s.io/pv/name"
+	pvcNameMetadata      = "${pvc.metadata.name}"
+	pvcNamespaceMetadata = "${pvc.metadata.namespace}"
+	pvNameMetadata       = "${pv.metadata.name}"
 )
 
 // DriverOptions defines driver parameters specified in driver deployment
@@ -156,3 +162,13 @@ func setKeyValueInMap(m map[string]string, key, value string) {
 	}
 	m[key] = value
 }
+
+// replaceWithMap replace key with value for str
+func replaceWithMap(str string, m map[string]string) string {
+	for k, v := range m {
+		if k != "" {
+			str = strings.ReplaceAll(str, k, v)
+		}
+	}
+	return str
+}

pkg/smb/smb.go

@@ -230,3 +230,55 @@ func TestSetKeyValueInMap(t *testing.T) {
 		}
 	}
 }
+
+func TestReplaceWithMap(t *testing.T) {
+	tests := []struct {
+		desc     string
+		str      string
+		m        map[string]string
+		expected string
+	}{
+		{
+			desc:     "empty string",
+			str:      "",
+			expected: "",
+		},
+		{
+			desc:     "empty map",
+			str:      "",
+			m:        map[string]string{},
+			expected: "",
+		},
+		{
+			desc:     "empty key",
+			str:      "prefix-" + pvNameMetadata,
+			m:        map[string]string{"": "pv"},
+			expected: "prefix-" + pvNameMetadata,
+		},
+		{
+			desc:     "empty value",
+			str:      "prefix-" + pvNameMetadata,
+			m:        map[string]string{pvNameMetadata: ""},
+			expected: "prefix-",
+		},
+		{
+			desc:     "one replacement",
+			str:      "prefix-" + pvNameMetadata,
+			m:        map[string]string{pvNameMetadata: "pv"},
+			expected: "prefix-pv",
+		},
+		{
+			desc:     "multiple replacements",
+			str:      pvcNamespaceMetadata + pvcNameMetadata,
+			m:        map[string]string{pvcNamespaceMetadata: "namespace", pvcNameMetadata: "pvcname"},
+			expected: "namespacepvcname",
+		},
+	}
+
+	for _, test := range tests {
+		result := replaceWithMap(test.str, test.m)
+		if result != test.expected {
+			t.Errorf("test[%s]: unexpected output: %v, expected result: %v", test.desc, result, test.expected)
+		}
+	}
+}

pkg/smb/smb_test.go

@@ -56,7 +56,7 @@ var (
 	}
 	subDirStorageClassParameters = map[string]string{
 		"source": "//smb-server.default.svc.cluster.local/share",
-		"subDir": "subDirectory",
+		"subDir": "subDirectory-${pvc.metadata.name}",
 		"csi.storage.k8s.io/provisioner-secret-name":      "smbcreds",
 		"csi.storage.k8s.io/provisioner-secret-namespace": "default",
 		"csi.storage.k8s.io/node-stage-secret-name":       "smbcreds",