[v4.4] quadlet: Add device support for .volume files

docs/source/markdown/podman-systemd.unit.5.md

@@ -412,6 +412,23 @@ Set one or more OCI labels on the volume. The format is a list of
 
 This key can be listed multiple times.
 
+#### `Device=`
+
+The path of a device which should be mounted for the volume.
+
+#### `Type=`
+
+The filesystem type of `Device` as used by the **mount(8)** commands `-t` option.
+
+#### `Options=`
+
+The mount options to use for a filesystem as used by the **mount(8)** command `-o` option.
+
+#### `Copy=` (default to `yes`)
+
+If enabled, the content of the image located at the mountpoint of the volume is copied into the
+volume on the first run.
+
 ### Network units
 
 Network files are named with a `.network` extension and contain a section `[Network]` describing the

pkg/systemd/quadlet/quadlet.go

@@ -50,6 +50,10 @@ const (
 	KeyPublishPort       = "PublishPort"
 	KeyUser              = "User"
 	KeyGroup             = "Group"
+	KeyDevice            = "Device"
+	KeyType              = "Type"
+	KeyOptions           = "Options"
+	KeyCopy              = "Copy"
 	KeyVolume            = "Volume"
 	KeyPodmanArgs        = "PodmanArgs"
 	KeyLabel             = "Label"
@@ -111,9 +115,13 @@ var (
 
 	// Supported keys in "Volume" group
 	supportedVolumeKeys = map[string]bool{
-		KeyUser:  true,
-		KeyGroup: true,
-		KeyLabel: true,
+		KeyUser:    true,
+		KeyGroup:   true,
+		KeyDevice:  true,
+		KeyType:    true,
+		KeyOptions: true,
+		KeyCopy:    true,
+		KeyLabel:   true,
 	}
 
 	// Supported keys in "Volume" group
@@ -622,6 +630,44 @@ func ConvertVolume(volume *parser.UnitFile, name string) (*parser.UnitFile, erro
 		opts.WriteString(fmt.Sprintf("gid=%d", gid))
 	}
 
+	copy, ok := volume.LookupBoolean(VolumeGroup, KeyCopy)
+	if ok {
+		if copy {
+			podman.add("--opt", "copy")
+		} else {
+			podman.add("--opt", "nocopy")
+		}
+	}
+
+	devValid := false
+
+	dev, ok := volume.Lookup(VolumeGroup, KeyDevice)
+	if ok && len(dev) != 0 {
+		podman.add("--opt", fmt.Sprintf("device=%s", dev))
+		devValid = true
+	}
+
+	devType, ok := volume.Lookup(VolumeGroup, KeyType)
+	if ok && len(devType) != 0 {
+		if devValid {
+			podman.add("--opt", fmt.Sprintf("type=%s", devType))
+		} else {
+			return nil, fmt.Errorf("key Type can't be used without Device")
+		}
+	}
+
+	mountOpts, ok := volume.Lookup(VolumeGroup, KeyOptions)
+	if ok && len(mountOpts) != 0 {
+		if devValid {
+			if opts.Len() > 2 {
+				opts.WriteString(",")
+			}
+			opts.WriteString(mountOpts)
+		} else {
+			return nil, fmt.Errorf("key Options can't be used without Device")
+		}
+	}
+
 	if opts.Len() > 2 {
 		podman.add("--opt", opts.String())
 	}

test/e2e/quadlet/device-copy.volume

@@ -0,0 +1,13 @@
+## assert-key-contains Service ExecStart " --opt o=uid=0,gid=11,rw,compress=zstd "
+## assert-key-contains Service ExecStart " --opt type=btrfs "
+## assert-key-contains Service ExecStart " --opt device=/dev/vda1 "
+## assert-key-contains Service ExecStart " --opt copy "
+
+[Volume]
+# Test usernames too
+User=root
+Group=11
+Device=/dev/vda1
+Type=btrfs
+Options=rw,compress=zstd
+Copy=yes

test/e2e/quadlet/device.volume

@@ -0,0 +1,13 @@
+## assert-key-contains Service ExecStart " --opt o=uid=0,gid=11,rw,compress=zstd "
+## assert-key-contains Service ExecStart " --opt type=btrfs "
+## assert-key-contains Service ExecStart " --opt device=/dev/vda1 "
+## assert-key-contains Service ExecStart " --opt nocopy "
+
+[Volume]
+# Test usernames too
+User=root
+Group=11
+Device=/dev/vda1
+Type=btrfs
+Options=rw,compress=zstd
+Copy=no

test/e2e/quadlet_test.go

@@ -482,6 +482,7 @@ var _ = Describe("quadlet system generator", func() {
 		Entry("basic.volume", "basic.volume"),
 		Entry("label.volume", "label.volume"),
 		Entry("uid.volume", "uid.volume"),
+		Entry("device.volume", "device-copy.volume"),
 
 		Entry("Basic kube", "basic.kube"),
 		Entry("Syslog Identifier", "syslog.identifier.kube"),