quadlet: support user mapping in pod unit

cmd/quadlet/main.go

@@ -658,7 +658,7 @@ func process() error {
 		case strings.HasSuffix(unit.Filename, ".build"):
 			service, err = quadlet.ConvertBuild(unit, unitsInfoMap)
 		case strings.HasSuffix(unit.Filename, ".pod"):
-			service, err = quadlet.ConvertPod(unit, unit.Filename, unitsInfoMap)
+			service, err = quadlet.ConvertPod(unit, unit.Filename, unitsInfoMap, isUserFlag)
 		default:
 			Logf("Unsupported file type %q", unit.Filename)
 			continue

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

@@ -867,13 +867,18 @@ Valid options for `[Pod]` are listed below:
 | **[Pod] options**                   | **podman container create equivalent** |
 |-------------------------------------|----------------------------------------|
 | ContainersConfModule=/etc/nvd\.conf | --module=/etc/nvd\.conf                |
+| GIDMap=0:10000:10                   | --gidmap=0:10000:10                   |
 | GlobalArgs=--log-level=debug        | --log-level=debug                      |
 | Network=host                        | --network host                         |
 | NetworkAlias=name                   | --network-alias name                   |
 | PodmanArgs=\-\-cpus=2               | --cpus=2                               |
 | PodName=name                        | --name=name                            |
 | PublishPort=50-59                   | --publish 50-59                        |
 | ServiceName=name                    | Name the systemd unit `name.service`   |
+| SubGIDMap=gtest                     | --subgidname=gtest                     |
+| SubUIDMap=utest                     | --subuidname=utest                     |
+| UIDMap=0:10000:10                   | --uidmap=0:10000:10                    |
+| UserNS=keep-id:uid=200,gid=210      | --userns keep-id:uid=200,gid=210       |
 | Volume=/source:/dest                | --volume /source:/dest                 |
 
 Supported keys in the `[Pod]` section are:
@@ -884,6 +889,13 @@ Load the specified containers.conf(5) module. Equivalent to the Podman `--module
 
 This key can be listed multiple times.
 
+### `GIDMap=`
+
+Create the pod in a new user namespace using the supplied GID mapping.
+Equivalent to the Podman `--gidmap` option.
+
+This key can be listed multiple times.
+
 ### `GlobalArgs=`
 
 This key contains a list of arguments passed directly between `podman` and `pod`
@@ -966,6 +978,28 @@ Setting this key overrides this behavior by instructing Quadlet to use the provi
 
 Note, the name should not include the `.service` file extension
 
+### `SubGIDMap=`
+
+Create the pod in a new user namespace using the map with name in the /etc/subgid file.
+Equivalent to the Podman `--subgidname` option.
+
+### `SubUIDMap=`
+
+Create the pod in a new user namespace using the map with name in the /etc/subuid file.
+Equivalent to the Podman `--subuidname` option.
+
+### `UIDMap=`
+
+Create the pod in a new user namespace using the supplied UID mapping.
+Equivalent to the Podman `--uidmap` option.
+
+This key can be listed multiple times.
+
+### `UserNS=`
+
+Set the user namespace mode for the pod. This is equivalent to the Podman `--userns` option and
+generally has the form `MODE[:OPTIONS,...]`.
+
 ### `Volume=`
 
 Mount a volume in the pod. This is equivalent to the Podman `--volume` option, and

pkg/systemd/quadlet/quadlet.go

@@ -380,13 +380,22 @@ var (
 
 	supportedPodKeys = map[string]bool{
 		KeyContainersConfModule: true,
+		KeyGIDMap:               true,
 		KeyGlobalArgs:           true,
 		KeyNetwork:              true,
 		KeyNetworkAlias:         true,
 		KeyPodName:              true,
 		KeyPodmanArgs:           true,
 		KeyPublishPort:          true,
+		KeyRemapGid:             true,
+		KeyRemapUid:             true,
+		KeyRemapUidSize:         true,
+		KeyRemapUsers:           true,
 		KeyServiceName:          true,
+		KeySubGIDMap:            true,
+		KeySubUIDMap:            true,
+		KeyUIDMap:               true,
+		KeyUserNS:               true,
 		KeyVolume:               true,
 	}
 )
@@ -1570,7 +1579,7 @@ func getServiceName(quadletUnitFile *parser.UnitFile, groupName string, defaultE
 	return removeExtension(quadletUnitFile.Filename, "", defaultExtraSuffix)
 }
 
-func ConvertPod(podUnit *parser.UnitFile, name string, unitsInfoMap map[string]*UnitInfo) (*parser.UnitFile, error) {
+func ConvertPod(podUnit *parser.UnitFile, name string, unitsInfoMap map[string]*UnitInfo, isUser bool) (*parser.UnitFile, error) {
 	unitInfo, ok := unitsInfoMap[podUnit.Filename]
 	if !ok {
 		return nil, fmt.Errorf("internal error while processing pod %s", podUnit.Filename)
@@ -1639,6 +1648,10 @@ func ConvertPod(podUnit *parser.UnitFile, name string, unitsInfoMap map[string]*
 		"--replace",
 	)
 
+	if err := handleUserMappings(podUnit, PodGroup, execStartPre, isUser, true); err != nil {
+		return nil, err
+	}
+
 	if err := handlePublishPorts(podUnit, PodGroup, execStartPre); err != nil {
 		return nil, err
 	}

test/e2e/quadlet/remap-auto.pod

@@ -0,0 +1,4 @@
+## assert-podman-pre-args --userns=auto
+
+[Pod]
+RemapUsers=auto

test/e2e/quadlet/remap-auto2.pod

@@ -0,0 +1,9 @@
+## assert-podman-pre-args "--userns=auto:uidmapping=0:10000:10,uidmapping=10:20000:10,gidmapping=0:10000:10,gidmapping=10:20000:10,size=20"
+
+[Pod]
+RemapUsers=auto
+RemapUid=0:10000:10
+RemapUid=10:20000:10
+RemapGid=0:10000:10
+RemapGid=10:20000:10
+RemapUidSize=20

test/e2e/quadlet/remap-keep-id.pod

@@ -0,0 +1,4 @@
+## assert-podman-pre-args --userns=keep-id
+
+[Pod]
+RemapUsers=keep-id

test/e2e/quadlet/remap-manual.pod

@@ -0,0 +1,11 @@
+## assert-podman-pre-args "--uidmap=0:10000:10"
+## assert-podman-pre-args "--uidmap=10:20000:10"
+## assert-podman-pre-args "--gidmap=0:10000:10"
+## assert-podman-pre-args "--gidmap=10:20000:10"
+
+[Pod]
+RemapUsers=manual
+RemapUid=0:10000:10
+RemapUid=10:20000:10
+RemapGid=0:10000:10
+RemapGid=10:20000:10

test/e2e/quadlet_test.go

@@ -998,11 +998,15 @@ BOGUS=foo
 		Entry("Build - TLSVerify Key", "tls-verify.build"),
 		Entry("Build - Variant Key", "variant.build"),
 
-		Entry("basic.pod", "basic.pod"),
-		Entry("name.pod", "name.pod"),
-		Entry("network.pod", "network.pod"),
-		Entry("podmanargs.pod", "podmanargs.pod"),
+		Entry("Pod - Basic", "basic.pod"),
+		Entry("Pod - Name", "name.pod"),
+		Entry("Pod - Network", "network.pod"),
+		Entry("Pod - PodmanArgs", "podmanargs.pod"),
 		Entry("Pod - NetworkAlias", "network-alias.pod"),
+		Entry("Pod - Remap auto", "remap-auto.pod"),
+		Entry("Pod - Remap auto2", "remap-auto2.pod"),
+		Entry("Pod - Remap keep-id", "remap-keep-id.pod"),
+		Entry("Pod - Remap manual", "remap-manual.pod"),
 	)
 
 	DescribeTable("Running expected warning quadlet test case",