Allow PublishPorts to be used with [Pod] entry

Fixed: https://github.com/containers/podman/issues/21035

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

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

@@ -719,6 +719,7 @@ Valid options for `[Pod]` are listed below:
 | Network=host                        | --network host                         |
 | PodmanArgs=\-\-cpus=2               | --cpus=2                               |
 | PodName=name                        | --name=name                            |
+| PublishPort=50-59                   | --publish 50-59                        |
 | Volume=/source:/dest                | --volume /source:/dest                 |
 
 Supported keys in the `[Pod]` section are:
@@ -775,6 +776,23 @@ prefix to avoid conflicts with user-managed containers.
 Please note that pods and containers cannot have the same name.
 So, if PodName is set, it must not conflict with any container.
 
+### `PublishPort=`
+
+Exposes a port, or a range of ports (e.g. `50-59`), from the pod to the host. Equivalent
+to the Podman `--publish` option. The format is similar to the Podman options, which is of
+the form `ip:hostPort:containerPort`, `ip::containerPort`, `hostPort:containerPort` or
+`containerPort`, where the number of host and container ports must be the same (in the case
+of a range).
+
+If the IP is set to 0.0.0.0 or not set at all, the port is bound on all IPv4 addresses on
+the host; use [::] for IPv6.
+
+Note that not listing a host port means that Podman automatically selects one, and it
+may be different for each invocation of service. This makes that a less useful option. The
+allocated port can be found with the `podman port` command.
+
+This key can be listed multiple times.
+
 ### `Volume=`
 
 Mount a volume in the pod. This is equivalent to the Podman `--volume` option, and

pkg/systemd/quadlet/quadlet.go

@@ -324,8 +324,9 @@ var (
 		KeyContainersConfModule: true,
 		KeyGlobalArgs:           true,
 		KeyNetwork:              true,
-		KeyPodmanArgs:           true,
 		KeyPodName:              true,
+		KeyPodmanArgs:           true,
+		KeyPublishPort:          true,
 		KeyVolume:               true,
 	}
 )
@@ -1302,6 +1303,10 @@ func ConvertPod(podUnit *parser.UnitFile, name string, podsInfoMap map[string]*P
 		"--replace",
 	)
 
+	if err := handlePublishPorts(podUnit, PodGroup, execStartPre); err != nil {
+		return nil, err
+	}
+
 	addNetworks(podUnit, PodGroup, service, names, execStartPre)
 
 	if err := addVolumes(podUnit, service, PodGroup, names, execStartPre); err != nil {

test/e2e/quadlet/network.pod

@@ -1,4 +1,6 @@
 ## assert-podman-pre-args "--network=host"
+## assert-podman-pre-args --publish 127.0.0.1:80:90
 
 [Pod]
 Network=host
+PublishPort=127.0.0.1:80:90