action_utils: Add generic utils for managing podman containers

Signed-off-by: Benedek Nagy <contact@nbenedek.me>
[sunil: Rename methods]
[sunil: yapf formatting]
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/action_utils.py

@@ -487,3 +487,71 @@ def is_package_manager_busy():
         return True
     except subprocess.CalledProcessError:
         return False
+
+
+def podman_run(network_name, subnet, bridge_ip, host_port, container_port,
+               container_ip, volume_name, container_name, image_name,
+               extra_run_options=None, extra_network_options=None):
+    """Remove, recreate and run a podman container."""
+    try:
+        service_stop(container_name)
+        subprocess.run(['podman', 'network', 'rm', '--force', network_name],
+                       check=False)
+    finally:
+        network_create_command = [
+            'podman', 'network', 'create', '--driver', 'bridge', '--subnet',
+            subnet, '--gateway', bridge_ip, '--dns', bridge_ip,
+            '--interface-name', network_name, network_name
+        ]
+        if extra_network_options:
+            network_create_command.extend(extra_network_options)
+        # create bridge network
+        subprocess.run(network_create_command, check=True)
+
+        run_command = [
+            'podman',
+            'run',
+            '--detach',
+            # Only listen on localhost. This is to prevent
+            # exposing the host port to the internet
+            '--publish',
+            f'127.0.0.1:{host_port}:{container_port}',
+            '--network',
+            network_name,
+            '--ip',
+            container_ip,
+            '--volume',
+            f'{volume_name}:/var/www/html',
+            '--name',
+            container_name,
+            '--restart',
+            'unless-stopped',
+            '--quiet',
+            # enable automatic updates
+            '--label',
+            'io.containers.autoupdate=registry',
+            # If another container with the same name already
+            # exists, replace and remove it.
+            '--replace',
+        ] + (extra_run_options or []) + [image_name]
+        subprocess.run(run_command, check=True)
+
+        systemd_content = subprocess.run(
+            ['podman', 'generate', 'systemd', '--new', container_name],
+            capture_output=True, check=True).stdout.decode()
+        pathlib.Path('/etc/systemd/system/'
+                     '{container_name}.service').write_text(
+                         systemd_content, encoding='utf-8')
+        service_daemon_reload()
+
+
+def podman_uninstall(container_name, network_name, volume_name, image_name):
+    """Remove a podman container's components and systemd unit."""
+    components = [('network', network_name), ('volume', volume_name),
+                  ('image', image_name)]
+    for component in components:
+        subprocess.run(['podman', component[0], 'rm', component[1]],
+                       check=True)
+    pathlib.Path('/etc/systemd/system/{container_name}.service').unlink(
+        missing_ok=True)
+    service_daemon_reload()