Add support for AddHost in quadlet .pod and .container

Signed-off-by: Jerome degroote <jeromedu59230@gmx.fr>

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

@@ -257,6 +257,7 @@ Valid options for `[Container]` are listed below:
 |--------------------------------------|------------------------------------------------------|
 | AddCapability=CAP                    | --cap-add CAP                                        |
 | AddDevice=/dev/foo                   | --device /dev/foo                                    |
+| AddHost=hostname:192.168.10.11       | --add-host=hostname:192.168.10.11                    |
 | Annotation="XYZ"                     | --annotation "XYZ"                                   |
 | AutoUpdate=registry                  | --label "io.containers.autoupdate=registry"          |
 | CgroupsMode=no-conmon                | --cgroups=no-conmon                                  |
@@ -356,6 +357,14 @@ only if it exists on the host.
 
 This key can be listed multiple times.
 
+### `AddHost=`
+
+Add  host-to-IP mapping to /etc/hosts.
+The format is `hostname:ip`.
+
+Equivalent to the Podman `--add-host` option.
+This key can be listed multiple times.
+
 ### `Annotation=`
 
 Set one or more OCI annotations on the container. The format is a list of `key=value` items,
@@ -877,6 +886,7 @@ Valid options for `[Pod]` are listed below:
 
 | **[Pod] options**                   | **podman container create equivalent** |
 |-------------------------------------|----------------------------------------|
+| AddHost=hostname:192.168.10.11      | --add-host=hostname:192.168.10.11      |
 | ContainersConfModule=/etc/nvd\.conf | --module=/etc/nvd\.conf                |
 | GIDMap=0:10000:10                   | --gidmap=0:10000:10                   |
 | GlobalArgs=--log-level=debug        | --log-level=debug                      |
@@ -896,6 +906,14 @@ Valid options for `[Pod]` are listed below:
 
 Supported keys in the `[Pod]` section are:
 
+### `AddHost=`
+
+Add  host-to-IP mapping to /etc/hosts.
+The format is `hostname:ip`.
+
+Equivalent to the Podman `--add-host` option.
+This key can be listed multiple times.
+
 ### `ContainersConfModule=`
 
 Load the specified containers.conf(5) module. Equivalent to the Podman `--module` option.

pkg/systemd/quadlet/quadlet.go

@@ -56,6 +56,7 @@ const (
 const (
 	KeyAddCapability         = "AddCapability"
 	KeyAddDevice             = "AddDevice"
+	KeyAddHost               = "AddHost"
 	KeyAllTags               = "AllTags"
 	KeyAnnotation            = "Annotation"
 	KeyArch                  = "Arch"
@@ -190,6 +191,7 @@ var (
 	supportedContainerKeys = map[string]bool{
 		KeyAddCapability:         true,
 		KeyAddDevice:             true,
+		KeyAddHost:               true,
 		KeyAnnotation:            true,
 		KeyAutoUpdate:            true,
 		KeyCgroupsMode:           true,
@@ -381,6 +383,7 @@ var (
 	}
 
 	supportedPodKeys = map[string]bool{
+		KeyAddHost:              true,
 		KeyContainersConfModule: true,
 		KeyGIDMap:               true,
 		KeyGlobalArgs:           true,
@@ -832,6 +835,11 @@ func ConvertContainer(container *parser.UnitFile, isUser bool, unitsInfoMap map[
 		podman.add("--ip6", ip6)
 	}
 
+	addHosts := container.LookupAll(ContainerGroup, KeyAddHost)
+	for _, addHost := range addHosts {
+		podman.addf("--add-host=%s", addHost)
+	}
+
 	labels := container.LookupAllKeyVal(ContainerGroup, KeyLabel)
 	podman.addLabels(labels)
 
@@ -1691,6 +1699,11 @@ func ConvertPod(podUnit *parser.UnitFile, name string, unitsInfoMap map[string]*
 		execStartPre.addf("--ip6=%s", ip6)
 	}
 
+	addHosts := podUnit.LookupAll(PodGroup, KeyAddHost)
+	for _, addHost := range addHosts {
+		execStartPre.addf("--add-host=%s", addHost)
+	}
+
 	handlePodmanArgs(podUnit, PodGroup, execStartPre)
 
 	service.AddCmdline(ServiceGroup, "ExecStartPre", execStartPre.Args)

test/e2e/quadlet/host.container

@@ -0,0 +1,6 @@
+[Container]
+Image=localhost/imagename
+## assert-podman-args "--add-host=my-host-name:192.168.10.10"
+AddHost=my-host-name:192.168.10.10
+## assert-podman-args "--add-host=my-second-host-name:192.168.10.11"
+AddHost=my-second-host-name:192.168.10.11

test/e2e/quadlet/host.pod

@@ -0,0 +1,5 @@
+[Pod]
+## assert-podman-pre-args "--add-host=my-host-name:192.168.10.10"
+AddHost=my-host-name:192.168.10.10
+## assert-podman-pre-args "--add-host=my-second-host-name:192.168.10.11"
+AddHost=my-second-host-name:192.168.10.11

test/e2e/quadlet_test.go

@@ -841,6 +841,7 @@ BOGUS=foo
 		Entry("exec.container", "exec.container"),
 		Entry("group-add.container", "group-add.container"),
 		Entry("health.container", "health.container"),
+		Entry("host.container", "host.container"),
 		Entry("hostname.container", "hostname.container"),
 		Entry("idmapping.container", "idmapping.container"),
 		Entry("image.container", "image.container"),
@@ -1000,6 +1001,7 @@ BOGUS=foo
 		Entry("Build - Variant Key", "variant.build"),
 
 		Entry("Pod - Basic", "basic.pod"),
+		Entry("Pod - Host", "host.pod"),
 		Entry("Pod - IP", "ip.pod"),
 		Entry("Pod - Name", "name.pod"),
 		Entry("Pod - Network", "network.pod"),