78a828ef42
This patch adds initial support for deploying multiple Nova cells. Splitting a nova-cell role out from the Nova role allows a more granular approach to deploying and configuring Nova services. A new enable_cells flag has been added that enables the support of multiple cells via the introduction of a super conductor in addition to cell-specific conductors. When this flag is not set (the default), nova is configured in the same manner as before - with a single conductor. The nova role now deploys the global services: * nova-api * nova-scheduler * nova-super-conductor (if enable_cells is true) The nova-cell role handles services specific to a cell: * nova-compute * nova-compute-ironic * nova-conductor * nova-libvirt * nova-novncproxy * nova-serialproxy * nova-spicehtml5proxy * nova-ssh This patch does not support using a single cell controller for managing more than one cell. Support for sharing a cell controller will be added in a future patch. This patch should be backwards compatible and is tested by existing CI jobs. A new CI job has been added that tests a multi-cell environment. ceph-mon has been removed from the play hosts list as it is not necessary - delegate_to does not require the host to be in the play. Documentation will be added in a separate patch. Partially Implements: blueprint support-nova-cells Co-Authored-By: Mark Goddard <mark@stackhpc.com> Change-Id: I810aad7d49db3f5a7fd9a2f0f746fd912fe03917
82 lines
3.5 KiB
YAML
82 lines
3.5 KiB
YAML
---
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# We need to wait for all expected compute services to register before running
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# cells v2 host discovery. This includes virtualised compute services and
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# ironic compute services.
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# Work with --limit by including only hosts in ansible_play_batch.
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- name: Build a list of expected compute service hosts
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vars:
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# For virt, use ansible_nodename rather than inventory_hostname, since this
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# is similar to what nova uses internally as its default for the
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# [DEFAULT] host config option.
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virt_compute_service_hosts: >-
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{{ groups[nova_cell_compute_group] |
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intersect(ansible_play_batch) |
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map('extract', hostvars, 'ansible_nodename') |
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list }}
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# For ironic, use {{ansible_hostname}}-ironic since this is what we
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# configure for [DEFAULT] host in nova.conf.
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ironic_compute_service_hosts: >-
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{{ (groups[nova_cell_compute_ironic_group] |
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intersect(ansible_play_batch) |
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map('extract', hostvars, 'ansible_hostname') |
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map('regex_replace', '^(.*)$', '\1-ironic') |
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list)
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if nova_cell_services['nova-compute-ironic'].enabled | bool else [] }}
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set_fact:
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expected_compute_service_hosts: "{{ virt_compute_service_hosts + ironic_compute_service_hosts }}"
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when: inventory_hostname == groups[nova_cell_conductor_group][0] | default(None)
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- name: Waiting for nova-compute services to register themselves
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become: true
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command: >
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docker exec kolla_toolbox openstack
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--os-interface internal
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--os-auth-url {{ keystone_admin_url }}
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--os-identity-api-version 3
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--os-project-domain-name {{ openstack_auth.domain_name }}
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--os-tenant-name {{ openstack_auth.project_name }}
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--os-username {{ openstack_auth.username }}
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--os-password {{ keystone_admin_password }}
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--os-user-domain-name {{ openstack_auth.domain_name }}
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--os-region-name {{ openstack_region_name }}
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{% if openstack_cacert != '' %}--os-cacert {{ openstack_cacert }}{% endif %}
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compute service list --format json --column Host --service nova-compute
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register: nova_compute_services
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changed_when: false
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retries: 20
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delay: 10
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until:
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- nova_compute_services is success
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# A list containing the 'Host' field of compute services that have
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# registered themselves. Don't exclude compute services that are disabled
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# since these could have been explicitly disabled by the operator. While we
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# could exclude services that are down, the nova-manage cell_v2
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# discover_hosts does not do this so let's not block on it here.
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# NOTE(mgoddard): Cannot factor this out into an intermediary variable
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# before ansible 2.8, due to
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# https://bugs.launchpad.net/kolla-ansible/+bug/1835817.
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- (nova_compute_services.stdout |
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from_json |
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map(attribute='Host') |
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list)
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is superset(expected_compute_service_hosts)
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when: inventory_hostname == groups[nova_cell_conductor_group][0] | default(None)
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- import_tasks: get_cell_settings.yml
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- name: Fail if cell settings not found
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fail:
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msg: >-
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Unable to find settings for {{ nova_cell_name or 'the default cell' }}.
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when:
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- inventory_hostname == groups[nova_cell_conductor_group][0] | default(None)
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- not nova_cell_settings
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# TODO(yoctozepto): no need to do --by-service if ironic not used
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- name: Discover nova hosts
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become: true
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command: >
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docker exec nova_conductor nova-manage cell_v2 discover_hosts --by-service --cell_uuid {{ nova_cell_settings.cell_uuid }}
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changed_when: False
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when: inventory_hostname == groups[nova_cell_conductor_group][0] | default(None)
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