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.. _nodeset:
Nodeset
=======
A Nodeset is a named collection of nodes for use by a job. Jobs may
specify what nodes they require individually, however, by defining
groups of node types once and referring to them by name, job
configuration may be simplified.
Nodesets, like most configuration items, are unique within a tenant,
though a nodeset may be defined on multiple branches of the same
project as long as the contents are the same. This is to aid in
branch maintenance, so that creating a new branch based on an existing
branch will not immediately produce a configuration error.
.. code-block:: yaml
- nodeset:
name: nodeset1
nodes:
- name: controller
label: controller-label
- name: compute1
label: compute-label
- name:
- compute2
- web
label: compute-label
groups:
- name: ceph-osd
nodes:
- controller
- name: ceph-monitor
nodes:
- controller
- compute1
- compute2
- name: ceph-web
nodes:
- web
.. attr:: nodeset
A Nodeset requires two attributes:
.. attr:: name
:required:
The name of the Nodeset, to be referenced by a :ref:`job`.
This is required when defining a standalone Nodeset in Zuul.
When defining an in-line anonymous nodeset within a job
definition, this attribute should be omitted.
.. attr:: nodes
:required:
A list of node definitions, each of which has the following format:
.. attr:: name
:required:
The name of the node. This will appear in the Ansible inventory
for the job.
This can also be as a list of strings. If so, then the list of hosts in
the Ansible inventory will share a common ansible_host address.
.. attr:: label
:required:
The Nodepool label for the node. Zuul will request a node with
this label.
.. attr:: groups
Additional groups can be defined which are accessible from the ansible
playbooks.
.. attr:: name
:required:
The name of the group to be referenced by an ansible playbook.
.. attr:: nodes
:required:
The nodes that shall be part of the group. This is specified as a list
of strings.
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