Kayobe Configuration¶

Configuration Location¶

Kayobe configuration is by default located in /etc/kayobe on the Ansible control host. This location can be overridden to a different location to avoid touching the system configuration directory by setting the environment variable KAYOBE_CONFIG_PATH. Similarly, kolla configuration on the Ansible control host will by default be located in /etc/kolla and can be overridden via KOLLA_CONFIG_PATH.

Configuration Directory Layout¶

The Kayobe configuration directory contains Ansible extra-vars files and the Ansible inventory. An example of the directory structure is as follows:

extra-vars1.yml
extra-vars2.yml
inventory/
    group_vars/
        group1-vars
        group2-vars
    groups
    host_vars/
        host1-vars
        host2-vars
    hosts

Configuration Patterns¶

Ansible’s variable precedence rules are fairly well documented and provide a mechanism we can use for providing site localisation and customisation of OpenStack in combination with some reasonable default values. For global configuration options, Kayobe typically uses the following patterns:

• Playbook group variables for the all group in <kayobe repo>/ansible/group_vars/all/* set global defaults. These files should not be modified.
• Playbook group variables for other groups in <kayobe repo>/ansible/group_vars/<group>/* set defaults for some subsets of hosts. These files should not be modified.
• Extra-vars files in ${KAYOBE_CONFIG_PATH}/*.yml set custom values for global variables and should be used to apply global site localisation and customisation. By default these variables are commented out.

Additionally, variables can be set on a per-host basis using inventory host variables files in ${KAYOBE_CONFIG_PATH}/inventory/host_vars/*. It should be noted that variables set in extra-vars files take precedence over per-host variables.

Configuring Kayobe¶

The kayobe-config git repository contains a Kayobe configuration directory structure and unmodified configuration files. This repository can be used as a mechanism for version controlling Kayobe configuration. As Kayobe is updated, the configuration should be merged to incorporate any upstream changes with local modifications.

Alternatively, the baseline Kayobe configuration may be copied from a checkout of the Kayobe repository to the Kayobe configuration path:

$ mkdir -p ${KAYOBE_CONFIG_PATH:-/etc/kayobe/}
$ cp -r etc/kayobe/* ${KAYOBE_CONFIG_PATH:-/etc/kayobe/}

Once in place, each of the YAML and inventory files should be manually inspected and configured as required.