interfaces: T9269: do not run the hw-id naming pass in a container

Container interfaces are veth pairs created by the runtime. They have no
backing bus device in sysfs, so discover_physical_interfaces() never
considers them, and their MAC is assigned by the host and regenerated on
every start.

A pending node could thus never be resolved. The pass only spent both
bounded hardware waits and then asked for an hw-id that would not
survive a restart:

  interface 'eth0' still has no hw-id configured after this boot's
  naming pass - bind it manually, e.g. ...

Returning before write_status() leaves no status file behind, so
warn_missing_interface_hardware() in vyos-router stays quiet by itself.

setUpModule() pins the detection off for the test module - the build
container would otherwise short-circuit every existing main() test.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/system/vyos-net-name-resolve.py b/src/system/vyos-net-name-resolve.py
index 5b1f36533..e28f3b3c4 100755
--- a/src/system/vyos-net-name-resolve.py
+++ b/src/system/vyos-net-name-resolve.py
@@ -41,6 +41,7 @@ from sys import exit
 from vyos.configtree import ConfigTree
 from vyos.defaults import directories
 from vyos.migrate import ConfigMigrate
+from vyos.system.image import is_running_as_container
 from vyos.utils.process import rc_cmd
 from vyos.utils.process import run
 
@@ -613,6 +614,14 @@ def write_status(configured: dict, found: dict, missing: set, plan: dict,
 
 
 def main():
+    if is_running_as_container():
+        # A container has no NIC of its own - its interfaces are veth pairs
+        # created by the container runtime. They have no backing bus device in
+        # sysfs and their MAC is assigned by the host and regenerated on every
+        # start, so there is nothing to wait for and no hw-id worth binding.
+        logger.info('running inside a container - skipping hw-id naming pass')
+        return
+
     configured = get_configfile_interfaces()
     pending = get_pending_hwid_nodes()