Ocata Series Release Notes¶

15.1.3¶

New variables have been added to allow a deployer to customize a neutron systemd unit file to their liking.

The task dropping the neutron systemd unit files now uses the config_template action plugin allowing deployers access to customize the unit files as they see fit without having to load extra options into the defaults and polute the generic systemd unit file with jinja2 variables and conditionals.

For the os_neutron role, the systemd unit TimeoutSec value which controls the time between sending a SIGTERM signal and a SIGKILL signal when stopping or restarting the service has been reduced from 300 seconds to 120 seconds. This provides 2 minutes for long-lived sessions to drain while preventing new ones from starting before a restart or a stop. The RestartSec value which controls the time between the service stop and start when restarting has been reduced from 150 seconds to 2 seconds to make the restart happen faster. These values can be adjusted by using the neutron_*_init_config_overrides variables which use the config_template task to change template defaults.

For the os_neutron role, the systemd unit TimeoutSec value which controls the time between sending a SIGTERM signal and a SIGKILL signal when stopping or restarting the service has been reduced from 300 seconds to 120 seconds. This provides 2 minutes for long-lived sessions to drain while preventing new ones from starting before a restart or a stop. The RestartSec value which controls the time between the service stop and start when restarting has been reduced from 150 seconds to 2 seconds to make the restart happen faster. These values can be adjusted by using the neutron_*_init_config_overrides variables which use the config_template task to change template defaults.

The filename of the apt source for the ubuntu cloud archive can now be defined with the variable uca_apt_source_list_filename.

The number of worker threads for neutron will now be capped at 16 unless a specific value is specified. Previously, the calculated number of workers could get too high on systems with a large number of processors. This was particularly evident on POWER systems.

Capping the default value for the variables neutron_api_workers, neutron_num_sync_threads and neutron_metadata_workers to 16 when the user doesn’t configure these variables. Default value is half the number of vCPUs available on the machine with a capping value of 16.

The dragonflow plugin for neutron is now available. You can set the neutron_plugin_type to ml2.dragonflow to utilize this code path. The dragonflow code path is currently experimental.

Neutron SR-IOV can now be optionally deployed and configured. For details about the what the service is and what it provides, see the SR-IOV Installation Guide for more information.

The variables neutron_requirements_git_repo and neutron_requirements_git_install_branch have been removed in favour of using the URL/path to the upper-constraints file using the variable pip_install_upper_constraints instead.