Ocata Series Release Notes

15.1.21-11

Known Issues

  • With the release of CentOS 7.5, all pike releases are broken due to a mismatch in version between the libvirt-python library specified by the OpenStack community, and the version provided in CentOS 7.5. As such OSA is unable build the appropriate python library for libvirt. The only recourse for this is to upgrade the environment to the latest queens release.

Deprecation Notes

  • The variable nova_compute_pip_packages is no longer used and has been removed.

Bug Fixes

  • In order to prevent further issues with a libvirt and python-libvirt version mismatch, KVM-based compute nodes will now use the distribution package python library for libvirt. This should resolve the issue seen with pike builds on CentOS 7.5.

15.1.17

Known Issues

  • For all ocata releases up to 15.1.16 when executing the os-nova-install.yml playbook the nova-novncproxy and nova-spicehtml5proxy services will fail. The workaround to resolve this issue is to restart the services.

    cd /opt/rpc-openstack/openstack-ansible/playbooks
# start the service again
# replace nova-novncproxy with nova-spicehtml5proxy when appropriate
ansible nova_console -m service -a 'name=nova-novncproxy state=restarted'
# set the appropriate facts to prevent the playbook trying
# to reload it again when the playbook is run again
ansible nova_console -m ini_file -a 'dest=/etc/ansible/facts.d/openstack_ansible.fact section=nova option=need_service_restart value=False'

    This issue has been resolved in the 15.1.17 release.

15.1.8

New Features

  • The os_nova role now provides for doing online data migrations once the db sync has been completed. The data migrations will not be executed until the boolean variable nova_all_software_updated is true. This variable will need to be set by the playbook consuming the role.

15.1.6

Deprecation Notes

  • The upstream noVNC developers recommend that the keymap be automatically detected for virtual machine consoles. The defaults for three Ansible variables have been removed:

    • nova_console_keymap

    • nova_novncproxy_vnc_keymap

    • nova_spice_console_keymap

    The nova.conf template still includes these variables and it sets the keymap configuration option. Deployers who have customized this setting will not see a change in their nova.conf.

Bug Fixes

  • Upgrading from Newton to Ocata will now correctly add existing Nova instances to the nova_cell1_name cell. For more information see bug 1682169.

15.1.3

New Features

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

  • The task dropping the nova 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_nova 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 nova_*_init_config_overrides variables which use the config_template task to change template defaults.

Upgrade Notes

  • For the os_nova 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 nova_*_init_config_overrides variables which use the config_template task to change template defaults.

15.1.2

New Features

  • Removed dependency for cinder_backends_rbd_inuse in nova.conf when setting rbd_user and rbd_secret_uuid variables. Cinder delivers all necessary values via RPC when attaching the volume, so those variables are only necessary for ephemeral disks stored in Ceph. These variables are required to be set up on cinder-volume side under backend section.

Bug Fixes

  • Nova features that use libguestfs (libvirt password/key injection) now work on compute hosts running Ubuntu. When Nova is deployed to Ubuntu compute hosts and either nova_libvirt_inject_key or nova_libvirt_inject_password are set to True, then kernels stored in /boot/vmlinuz-* will be made readable to nova user. See launchpad bug 1507915.

15.0.0

New Features

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

  • Capping the default value for the variables nova_wsgi_processes, nova_osapi_compute_workers, nova_metadata_workers and nova_conductor_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 nova-placement service is now configured by default. nova_placement_service_enabled can be set to False to disable the nova-placement service.

  • The nova-placement api service will run as its own ansible group nova_api_placement.

  • Nova cell_v2 support has been added. The default cell is cell1 which can be overridden by the nova_cell1_name. Support for multiple cells is not yet available.

  • CentOS7/RHEL support has been added to the os_nova role.

Upgrade Notes

  • The nova-cert service has been deprecated, is marked for removal in the Ocata release, and will no longer be deployed by the os_nova role.

  • The variables nova_requirements_git_repo and nova_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.

  • The variables nova_lxd_requirements_git_repo and nova_lxd_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.

Bug Fixes

  • The URL of NovaLink uses ‘ftp’ protocol to provision apt key. It causes apt_key module to fail to retrieve NovaLink gpg public key file. Therefore, change the protocol of URL to ‘http’. For more information, see bug 1637348.

  • Setup for the PowerVM driver was not properly configuring the system to support RMC configuration for client instances. This fix introduces an interface template for PowerVM that properly supports mixed IPV4/IPV6 deploys and adds documentation for PowerVM RMC. For more information see bug 1643988.