openstack/tripleo-heat-templates
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3b50fdf886
tripleo-heat-templates/roles/README.rst
Steven Hardy d006711426 Allow defaults for Image/Flavor/RoleParameters in roles_data.yaml 
This allows specific roles, e.g ComputeRealTime to specify defaults
where the services are the same as some existing roles but a different
image and/or configuration are needed.

Inspired by discussion of this requirement in:
  https://review.openstack.org/#/c/531739/

RoleParametersDefaults is merged with the user provided parameters
with precendence to user parameters, as this is a special parameter,
which contains a map of the actual parameters to be applied to a
role.

Partially Implements: blueprint tripleo-realtime
Change-Id: I6497144340d3b9276e6ed141d3bc655bfbbeb53c
2018-01-19 11:06:36 +05:30

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Roles
=====
The yaml files in this directory can be combined into a single roles_data.yaml
and be used with TripleO to create custom deployments.
Use tripleoclient to build your own custom roles_data.yaml for your
environment.
roles_data.yaml
---------------
The roles_data.yaml specifies which roles (groups of nodes) will be deployed.
Note this file is used as an input the the various \*.j2.yaml jinja2 templates,
so that they are converted into \*.yaml during the plan creation. This occurs
via a mistral action/workflow. The file format of this file is a yaml list.
Role YAML files
===============
Each role yaml file should contain only a single role. The filename should
match the role name. The name of the role is mandatory and must be unique.
The role files in this folder should contain at least a role name and the
default list of services for the role.
Role Options
------------
* CountDefault: (number) optional, default number of nodes, defaults to 0
sets the default for the {{role.name}}Count parameter in overcloud.yaml
* HostnameFormatDefault: (string) optional default format string for hostname
defaults to '%stackname%-{{role.name.lower()}}-%index%'
sets the default for {{role.name}}HostnameFormat parameter in overcloud.yaml
* ImageDefault: (string) optional default image name or ID, defaults to
overcloud-full
* FlavorDefault: (string) optional default flavor name or ID, defaults to
baremetal
* RoleParametersDefault: (map) optional default to the per-role RoleParameters
value, this enables roles to specify specific values appropriate to their
configuration, defaults to an empty map.
* disable_constraints: (boolean) optional, whether to disable Nova and Glance
constraints for each role specified in the templates.
* disable_upgrade_deployment: (boolean) optional, whether to run the
ansible upgrade steps for all services that are deployed on the role. If set
to True, the operator will drive the upgrade for this role's nodes.
* upgrade_batch_size: (number): batch size for upgrades where tasks are
specified by services to run in batches vs all nodes at once.
This defaults to 1, but larger batches may be specified here.
* ServicesDefault: (list) optional default list of services to be deployed
on the role, defaults to an empty list. Sets the default for the
{{role.name}}Services parameter in overcloud.yaml
* tags: (list) list of tags used by other parts of the deployment process to
find the role for a specific type of functionality. Currently a role
with both 'primary' and 'controller' is used as the primary role for the
deployment process. If no roles have have 'primary' and 'controller', the
first role in this file is used as the primary role.
* description: (string) as few sentences describing the role and information
pertaining to the usage of the role.
* networks: (list), optional list of networks which the role will have
access to when network isolation is enabled. The names should match
those defined in network_data.yaml.
Working with Roles
==================
The tripleoclient provides a series of commands that can be used to view
roles and generate a roles_data.yaml file for deployment.
Listing Available Roles
-----------------------
The ``openstack overcloud role list`` command can be used to view the list
of roles provided by tripleo-heat-templates.
Usage
^^^^^
.. code-block::
usage: openstack overcloud role list [-h] [--roles-path <roles directory>]
List availables roles
optional arguments:
-h, --help show this help message and exit
--roles-path <roles directory>
Filesystem path containing the role yaml files. By
default this is /usr/share/openstack-tripleo-heat-
templates/roles
Example
^^^^^^^
.. code-block::
[user@host ~]$ openstack overcloud role list
BlockStorage
CephStorage
Compute
ComputeOvsDpdk
ComputeSriov
Controller
ControllerOpenstack
Database
Messaging
Networker
ObjectStorage
Telemetry
Undercloud
Viewing Role Details
--------------------
The ``openstack overcloud role show`` command can be used as a quick way to
view some of the information about a role.
Usage
^^^^^
.. code-block::
usage: openstack overcloud role show [-h] [--roles-path <roles directory>]
<role>
Show information about a given role
positional arguments:
<role> Role to display more information about.
optional arguments:
-h, --help show this help message and exit
--roles-path <roles directory>
Filesystem path containing the role yaml files. By
default this is /usr/share/openstack-tripleo-heat-
templates/roles
Example
^^^^^^^
.. code-block::
[user@host ~]$ openstack overcloud role show Compute
###############################################################################
# Role Data for 'Compute'
###############################################################################
HostnameFormatDefault: '%stackname%-novacompute-%index%'
ServicesDefault:
* OS::TripleO::Services::AuditD
* OS::TripleO::Services::CACerts
* OS::TripleO::Services::CephClient
* OS::TripleO::Services::CephExternal
* OS::TripleO::Services::CertmongerUser
* OS::TripleO::Services::Collectd
* OS::TripleO::Services::ComputeCeilometerAgent
* OS::TripleO::Services::ComputeNeutronCorePlugin
* OS::TripleO::Services::ComputeNeutronL3Agent
* OS::TripleO::Services::ComputeNeutronMetadataAgent
* OS::TripleO::Services::ComputeNeutronOvsAgent
* OS::TripleO::Services::Docker
* OS::TripleO::Services::Fluentd
* OS::TripleO::Services::Iscsid
* OS::TripleO::Services::Kernel
* OS::TripleO::Services::MySQLClient
* OS::TripleO::Services::NeutronSriovAgent
* OS::TripleO::Services::NeutronVppAgent
* OS::TripleO::Services::NovaCompute
* OS::TripleO::Services::NovaLibvirt
* OS::TripleO::Services::NovaMigrationTarget
* OS::TripleO::Services::Ntp
* OS::TripleO::Services::OpenDaylightOvs
* OS::TripleO::Services::Securetty
* OS::TripleO::Services::SensuClient
* OS::TripleO::Services::Snmp
* OS::TripleO::Services::Sshd
* OS::TripleO::Services::Timezone
* OS::TripleO::Services::TripleoFirewall
* OS::TripleO::Services::TripleoPackages
* OS::TripleO::Services::Vpp
name: 'Compute'
Generate roles_data.yaml
------------------------
The ``openstack overcloud roles generate`` command can be used to generate
a roles_data.yaml file for deployments.
Usage
^^^^^
.. code-block::
usage: openstack overcloud roles generate [-h]
[--roles-path <roles directory>]
[-o <output file>]
<role> [<role> ...]
Generate roles_data.yaml file
positional arguments:
<role> List of roles to use to generate the roles_data.yaml
file for the deployment. NOTE: Ordering is important
if no role has the "primary" and "controller" tags. If
no role is tagged then the first role listed will be
considered the primary role. This usually is the
controller role.
optional arguments:
-h, --help show this help message and exit
--roles-path <roles directory>
Filesystem path containing the role yaml files. By
default this is /usr/share/openstack-tripleo-heat-
templates/roles
-o <output file>, --output-file <output file>
File to capture all output to. For example,
roles_data.yaml
Example
^^^^^^^
.. code-block::
[user@host ~]$ openstack overcloud roles generate -o roles_data.yaml Controller Compute BlockStorage ObjectStorage CephStorage
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