Newton Series Release Notes¶

14.2.4¶

When executing a deployment which includes the telemetry systems (ceilometer, gnocchi, aodh), the repo build will fail due to the inability for pip to read the constraints properly from the extras section in ceilometer’s setup.cfg. The current workaround for this is to add the following content to /etc/openstack_deploy/user_variables.yml.
```
repo_build_upper_constraints_overrides:
  - gnocchiclient<3.0.0
```

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

The task dropping the ceilometer 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_ceilometer 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 ceilometer_*_init_config_overrides variables which use the config_template task to change template defaults.

For the os_ceilometer 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 ceilometer_*_init_config_overrides variables which use the config_template task to change template defaults.

The variables ceilometer_requirements_git_repo and ceilometer_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.

Ceilometer can now use Gnocchi for storage. By default this is disabled. To enable the service, set ceilometer_gnocchi_enabled: yes. See the Gnocchi role documentation for more details.

Yaml files used for ceilometer configuration will now allow a deployer to override a given list. If an override is provided that matches an already defined list in one of the ceilometer default yaml files the entire list will be replaced by the provided override. Previously, a nested lists of lists within the default ceilometer configration files would extend should a deployer provide an override matching an existing pipeline. The extension of the defaults had a high probability to cause undesirable outcomes and was very unpredictable.

The os_ceilometer role now supports the ability to configure whether apt/yum tasks install the latest available package, or just ensure that the package is present. The default action is to ensure that the latest package is present. The action taken may be changed to only ensure that the package is present by setting ceilometer_package_state to present.

The default value of service_credentials/os_endpoint_type within ceilometer’s configuration file has been changed to internalURL. This may be overridden through the use of the ceilometer_ceilometer_conf_overrides variable.

Installation of ceilometer and its dependent pip packages will now only occur within a Python virtual environment. The ceilometer_venv_enabled and ceilometer_venv_bin variables have been removed.

The variable ceilometer_apt_packages has been renamed to ceilometer_distro_packages.

The variable ceilometer_developer_mode_apt_packages has been renamed to ceilometer_developer_mode_distro_packages.

The os_ceilometer role always checks whether the latest package is installed when executed. If a deployer wishes to change the check to only validate the presence of the package, the option ceilometer_package_state should be set to present.

The ceilometer-api init service is removed since ceilometer-api is deployed as an apache mod_wsgi service.

Ceilometer no longer manages alarm storage when Aodh is enabled. It now redirects alarm-related requests to the Aodh API. This is now auto-enabled when Aodh is deployed.

Overrides for ceilometer aodh_connection_string will no longer work. Specifying an Aodh connection string in Ceilometer was deprecated within Ceilometer in a prior release so this option has been removed.