Support and document all podman-specific network_modes

Signed-off-by: Bas Zoetekouw <bas.zoetekouw@surf.nl>

docs/Extensions.md

@@ -45,3 +45,23 @@ services:
         ipv4_address: "192.168.1.10"
         podman.mac_address: "02:bb:bb:bb:bb:bb"
 ```
+
+## Podman-specific network modes
+
+Generic docker-compose supports the following values for `network-mode` for a container:
+
+- `bridge`
+- `host`
+- `none`
+- `service`
+- `container`
+
+In addition, podman-compose supports the following podman-specific values for `network-mode`:
+
+- `slirp4netns[:<options>,...]`
+- `ns:<options>`
+- `pasta[:<options>,...]`
+- `private`
+
+The options to the network modes are passed to the `--network` option of the `podman create` command
+as-is.

podman_compose.py

@@ -789,7 +789,11 @@ def get_net_args(compose, cnt):
             net_args.append(f"--network={net}")
         elif net.startswith("slirp4netns"):  # Note: podman-specific network mode
             net_args.append(f"--network={net}")
-        elif net.startswith("ns:"):
+        elif net == "private":  # Note: podman-specific network mode
+            net_args.append("--network=private")
+        elif net.startswith("pasta"):  # Note: podman-specific network mode
+            net_args.append(f"--network={net}")
+        elif net.startswith("ns:"):  # Note: podman-specific network mode
             net_args.append(f"--network={net}")
         elif net.startswith("service:"):
             other_srv = net.split(":", 1)[1].strip()
@@ -809,6 +813,7 @@ def get_net_args(compose, cnt):
     default_net = compose.default_net
     nets = compose.networks
     cnt_nets = cnt.get("networks", None)
+
     aliases = [service_name]
     # NOTE: from podman manpage:
     # NOTE: A container will only have access to aliases on the first network

pytests/test_get_net_args.py

@@ -261,7 +261,10 @@ class TestGetNetArgs(unittest.TestCase):
         ("none", []),
         ("slirp4netns", ["--network=slirp4netns"]),
         ("slirp4netns:cidr=10.42.0.0/24", ["--network=slirp4netns:cidr=10.42.0.0/24"]),
+        ("private", ["--network=private"]),
+        ("pasta", ["--network=pasta"]),
         ("pasta:--ipv4-only,-a,10.0.2.0", ["--network=pasta:--ipv4-only,-a,10.0.2.0"]),
+        ("ns:my_namespace", ["--network=ns:my_namespace"]),
         ("container:my_container", ["--network=container:my_container"]),
     ])
     def test_network_modes(self, network_mode, expected_args):