container: T6702: re-add missing UNIX API socket

During podman upgrade and a build from the original source the UNIX socket
definition for systemd got lost in translation.

This commit re-adds the UNIX socket which is started on boot to interact with
Podman.

Example:
  curl --unix-socket /run/podman/podman.sock -H 'content-type: application/json' \
    -sf http://localhost/containers/json
(cherry picked from commit f67e217f2716937115a3bdf6d316b172bbec75e5)

4 files changed, 47 insertions, 0 deletions

diff --git a/debian/vyos-1x.postinst b/debian/vyos-1x.postinst
index 141a9e8f9..dc8ada267 100644
--- a/debian/vyos-1x.postinst
+++ b/debian/vyos-1x.postinst
@@ -244,6 +244,9 @@ fi
 # Enable Cloud-init pre-configuration service
 systemctl enable vyos-config-cloud-init.service
 
+# Enable Podman API
+systemctl enable podman.service
+
 # Generate API GraphQL schema
 /usr/libexec/vyos/services/api/graphql/generate/generate_schema.py
 
diff --git a/smoketest/scripts/cli/test_container.py b/smoketest/scripts/cli/test_container.py
index 3dd97a175..5e33eba40 100755
--- a/smoketest/scripts/cli/test_container.py
+++ b/smoketest/scripts/cli/test_container.py
@@ -230,5 +230,23 @@ class TestContainer(VyOSUnitTestSHIM.TestCase):
         tmp = cmd(f'sudo podman exec -it {cont_name} id -g')
         self.assertEqual(tmp, gid)
 
+    def test_api_socket(self):
+        base_name = 'api-test'
+        container_list = range(1, 5)
+
+        for ii in container_list:
+            name = f'{base_name}-{ii}'
+            self.cli_set(base_path + ['name', name, 'image', cont_image])
+            self.cli_set(base_path + ['name', name, 'allow-host-networks'])
+
+        self.cli_commit()
+
+        # Query API about running containers
+        tmp = cmd("sudo curl --unix-socket /run/podman/podman.sock -H 'content-type: application/json' -sf http://localhost/containers/json")
+        tmp = json.loads(tmp)
+
+        # We expect the same amount of containers from the API that we started above
+        self.assertEqual(len(container_list), len(tmp))
+
 if __name__ == '__main__':
     unittest.main(verbosity=2)
diff --git a/src/systemd/podman.service b/src/systemd/podman.service
new file mode 100644
index 000000000..20a16304b
--- /dev/null
+++ b/src/systemd/podman.service
@@ -0,0 +1,16 @@
+[Unit]
+Description=Podman API Service
+Requires=podman.socket
+After=podman.socket
+Documentation=man:podman-system-service(1)
+StartLimitIntervalSec=0
+
+[Service]
+Delegate=true
+Type=exec
+KillMode=process
+Environment=LOGGING="--log-level=info"
+ExecStart=/usr/bin/podman $LOGGING system service
+
+[Install]
+WantedBy=default.target
diff --git a/src/systemd/podman.socket b/src/systemd/podman.socket
new file mode 100644
index 000000000..397058ee4
--- /dev/null
+++ b/src/systemd/podman.socket
@@ -0,0 +1,10 @@
+[Unit]
+Description=Podman API Socket
+Documentation=man:podman-system-service(1)
+
+[Socket]
+ListenStream=%t/podman/podman.sock
+SocketMode=0660
+
+[Install]
+WantedBy=sockets.target