For change 739139 [1] PS 12, the
neutron-tempest-plugin-scenario-linuxbridge died in devstack with
"/opt/stack/devstack/functions-common:237 Failure retrieving default
route device", which comes from
"/opt/stack/devstack/lib/neutron-legacy:237:die_if_not_set".
Looking at the worlddump.txt for that job [2] I see that there is a
default ipv6 route; the vm was not configured with ipv4 networking.
ip route
--------
ip -6 route
-----------
::1 dev lo proto kernel metric 256 pref medium
2607:ff68:100:54::/64 dev ens3 proto kernel metric 256 expires 86380sec pref medium
fe80::/64 dev ens3 proto kernel metric 256 pref medium
default via fe80::f816:3eff:fe77:b05c dev ens3 proto ra metric 1024 expires 280sec hoplimit 64 pref medium
Looking at the devstack code that throws the error [3] it looks like
it only looks for a default route in the output of `ip route`, which
does not include ipv6 information. This change should look in both
the ipv4 and ipv6 route table. A similar check in the L3 setup code
is also updated.
[1] https://review.opendev.org/#/c/739139/
[2] https://d4eb7e3efe98cba79a4b-f4d168cdb20f40841821e4b213645c0f.ssl.cf2.rackcdn.com/739139/12/gate/neutron-tempest-plugin-scenario-linuxbridge/9a6b4f7/controller/logs/worlddump-latest.txt
[3] https://opendev.org/openstack/devstack/src/branch/master/lib/neutron-legacy#L236
Closes-Bug: #1902002
Change-Id: I839e8c222368df98fec308cf41248a9dd0a8c187
Neutron plugin specific files
Neutron plugins require plugin specific behavior.
The files under the directory, lib/neutron_plugins/, will be used
when their service is enabled.
Each plugin has lib/neutron_plugins/$Q_PLUGIN and define the following
functions.
Plugin specific configuration variables should be in this file.
- filename:
$Q_PLUGIN- The corresponding file name MUST be the same to plugin name
$Q_PLUGIN. Plugin specific configuration variables should be in this file.
- The corresponding file name MUST be the same to plugin name
functions
lib/neutron-legacy calls the following functions when the $Q_PLUGIN is enabled
neutron_plugin_create_nova_conf: optionally set options in nova_confneutron_plugin_install_agent_packages: install packages that is specific to plugin agent e.g. install_package bridge-utilsneutron_plugin_configure_common: set plugin-specific variables,Q_PLUGIN_CONF_PATH,Q_PLUGIN_CONF_FILENAME,Q_PLUGIN_CLASSneutron_plugin_configure_dhcp_agentneutron_plugin_configure_l3_agentneutron_plugin_configure_plugin_agentneutron_plugin_configure_serviceneutron_plugin_setup_interface_driverhas_neutron_plugin_security_group: return 0 if the plugin support neutron security group otherwise return 1neutron_plugin_check_adv_test_requirements: return 0 if requirements are satisfied otherwise return 1