kayobe/doc/source/administration/overcloud.rst

Overcloud Administration

Updating Packages

It is possible to update packages on the overcloud hosts. To update one or more packages:

(kayobe) $ kayobe overcloud host package update --packages <package1>,<package2>

To update all eligible packages, use *, escaping if necessary:

(kayobe) $ kayobe overcloud host package update --packages *

To only install updates that have been marked security related:

(kayobe) $ kayobe overcloud host package update --packages <packages> --security

Note that these commands do not affect packages installed in containers, only those installed on the host.

Reconfiguring Containerised Services

When configuration is changed, it is necessary to apply these changes across the system in an automated manner. To reconfigure the overcloud, first make any changes required to the configuration on the Ansible control host. Next, run the following command:

(kayobe) $ kayobe overcloud service reconfigure

In case not all services' configuration have been modified, performance can be improved by specifying Ansible tags to limit the tasks run in kayobe and/or kolla-ansible's playbooks. This may require knowledge of the inner workings of these tools but in general, kolla-ansible tags the play used to configure each service by the name of that service. For example: nova, neutron or ironic. Use -t or --tags to specify kayobe tags and -kt or --kolla-tags to specify kolla-ansible tags. For example:

(kayobe) $ kayobe overcloud service reconfigure --tags config --kolla-tags nova,ironic

Upgrading Containerised Services

Containerised control plane services may be upgraded by replacing existing containers with new containers using updated images which have been pulled from a registry or built locally. If using an updated version of Kayobe or upgrading from one release of OpenStack to another, be sure to follow the kayobe upgrade guide <upgrading>. It may be necessary to upgrade one or more services within a release, for example to apply a patch or minor release.

To upgrade the containerised control plane services:

(kayobe) $ kayobe overcloud service upgrade

As for the reconfiguration command, it is possible to specify tags for Kayobe and/or kolla-ansible:

(kayobe) $ kayobe overcloud service upgrade --tags config --kolla-tags keystone

Destroying the Overcloud Services

Note

This step will destroy all containers, container images, volumes and data on the overcloud hosts.

To destroy the overcloud services:

(kayobe) $ kayobe overcloud service destroy --yes-i-really-really-mean-it

Deprovisioning The Cloud

Note

This step will power down the overcloud hosts and delete their nodes' instance state from the seed's ironic service.

To deprovision the overcloud:

(kayobe) $ kayobe overcloud deprovision

Saving Overcloud Service Configuration

It is often useful to be able to save the configuration of the control plane services for inspection or comparison with another configuration set prior to a reconfiguration or upgrade. This command will gather and save the control plane configuration for all hosts to the Ansible control host:

(kayobe) $ kayobe overcloud service configuration save

The default location for the saved configuration is $PWD/overcloud-config, but this can be changed via the output-dir argument. To gather configuration from a directory other than the default /etc/kolla, use the node-config-dir argument.

Generating Overcloud Service Configuration

Prior to deploying, reconfiguring, or upgrading a control plane, it may be useful to generate the configuration that will be applied, without actually applying it to the running containers. The configuration should typically be generated in a directory other than the default configuration directory of /etc/kolla, to avoid overwriting the active configuration:

(kayobe) $ kayobe overcloud service configuration generate --node-config-dir /path/to/generated/config

The configuration will be generated remotely on the overcloud hosts in the specified directory, with one subdirectory per container. This command may be followed by kayobe ovecloud service configuration save to gather the generated configuration to the Ansible control host.