94b4adae2f
When Kolla Ansible is executed with a '--limit' argument, the scope of an operation is limited to the hosts in the limit. For example: kolla-ansible deploy --limit control Due to the nature of configuring clustered software services, there are cases where we need to know information about other hosts. Most often this is related to their hostname or network addresses. To make this work, Kolla Ansible gathers facts for hosts outside of the limit using delegated fact gathering [1]. By default, Kolla Ansible gathers facts for all hosts. Because delegated facts are gathered serially in batches by the active hosts, this can take a long time when there are not many hosts in the limit. This change makes it possible to reduce the set of hosts eligible for delegated fact gathering by setting 'kolla_ansible_delegate_facts_hosts' to a list of hosts. [1] https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_delegation.html#delegating-facts Depends-On: https://review.opendev.org/c/openstack/kolla-ansible/+/899615 Change-Id: Id0bda00b81b5bc6a9a870e231335c33d9828e95f
63 lines
2.4 KiB
YAML
63 lines
2.4 KiB
YAML
---
|
|
# NOTE(awiddersheim): Gather facts for all hosts as a
|
|
# first step since several plays below require them when
|
|
# building their configurations.
|
|
- name: Gather facts for all hosts
|
|
hosts: all
|
|
max_fail_percentage: >-
|
|
{{ gather_facts_max_fail_percentage |
|
|
default(kolla_max_fail_percentage) |
|
|
default(100) }}
|
|
serial: '{{ kolla_serial|default("0") }}'
|
|
gather_facts: false
|
|
tasks:
|
|
- name: Group hosts to determine when using --limit
|
|
group_by:
|
|
key: "all_using_limit_{{ (ansible_play_batch | length) != (groups['all'] | length) }}"
|
|
changed_when: false
|
|
|
|
- name: Gather facts
|
|
setup:
|
|
filter: "{{ kolla_ansible_setup_filter }}"
|
|
gather_subset: "{{ kolla_ansible_setup_gather_subset }}"
|
|
when:
|
|
# Don't gather if fact caching is in use
|
|
- not ansible_facts
|
|
tags: always
|
|
|
|
# NOTE(pbourke): This case covers deploying subsets of hosts using --limit. The
|
|
# limit arg will cause the first play to gather facts only about that node,
|
|
# meaning facts such as IP addresses for rabbitmq nodes etc. will be undefined
|
|
# in the case of adding a single compute node.
|
|
# NOTE(mgoddard): Divide all hosts to be queried between the hosts selected via
|
|
# the limit.
|
|
- name: Gather facts for all hosts (if using --limit)
|
|
hosts: all_using_limit_True
|
|
max_fail_percentage: >-
|
|
{{ gather_facts_max_fail_percentage |
|
|
default(kolla_max_fail_percentage) |
|
|
default(100) }}
|
|
serial: '{{ kolla_serial|default("0") }}'
|
|
gather_facts: false
|
|
vars:
|
|
batch_index: "{{ ansible_play_batch.index(inventory_hostname) }}"
|
|
batch_size: "{{ ansible_play_batch | length }}"
|
|
# Use a python list slice to divide the group up.
|
|
# Syntax: [<start index>:<end index>:<step size>]
|
|
delegate_hosts: "{{ kolla_ansible_delegate_facts_hosts[batch_index | int::batch_size | int] }}"
|
|
tasks:
|
|
- name: Gather facts
|
|
setup:
|
|
filter: "{{ kolla_ansible_setup_filter }}"
|
|
gather_subset: "{{ kolla_ansible_setup_gather_subset }}"
|
|
delegate_facts: True
|
|
delegate_to: "{{ item }}"
|
|
with_items: "{{ delegate_hosts }}"
|
|
when:
|
|
# We gathered facts for all hosts in the batch during the first play.
|
|
# Ensure that we don't try again if they failed.
|
|
- item not in groups["all_using_limit_True"]
|
|
# Don't gather if fact caching is in use
|
|
- not hostvars[item].ansible_facts
|
|
tags: always
|