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Role Name

An Ansible role for scaling and deleting nodes from an overcloud.

Requirements

This role assumes it will be executed against a host on which a Liberty, Mitaka, Newton, or Ocata under/overcloud have already been deployed.

Note: The validate-simple role must be accessible.

Role Variables

A description of the settable variables for this role should go here, including any variables that are in defaults/main.yml, vars/main.yml, and any variables that can/should be set via parameters to the role. Any variables that are read from other roles and/or the global scope (ie. hostvars, group vars, etc.) should be mentioned here as well.

Note: Make sure to include all environment file and options from your initial Overcloud creation. This includes the same scale parameters for non-Compute nodes.

artosn_scale_nodes: -- boolean value that will scale nodes if true
artosn_delete_original_node: -- boolean value that will delete the original node of type that was scaled
artosn_working_dir: <'/home/stack'> -- working directory for the role. Assumes stackrc file is present at this location

Dependencies

ansible-role-tripleo-overcloud-validate

Example Playbook

Sample playbook to call the role

- name: Scale overcloud nodes
  hosts: undercloud
  roles:
    - ansible-role-tripleo-overcloud-scale-nodes

Sample config file to scale from one compute node to two compute nodes on the overcloud

control_memory: 6144
compute_memory: 6144

undercloud_memory: 8192
undercloud_vcpu: 2

overcloud_nodes:
  - name: control_0
    flavor: control

  - name: compute_0
    flavor: compute

  - name: compute_1
    flavor: compute

  - name: compute_2
    flavor: compute

tempest: false
pingtest: true
deploy_timeout: 60

# General deployment info
libvirt_args: "--libvirt-type qemu"
flavor_args: >-
  --control-flavor {{flavor_map.control
  if flavor_map is defined and 'control' in flavor_map else 'oooq_control'}}
  --compute-flavor {{flavor_map.compute
  if flavor_map is defined and 'compute' in flavor_map else 'oooq_compute'}}
  --ceph-storage-flavor {{flavor_map.ceph
  if flavor_map is defined and 'ceph' in flavor_map else 'oooq_ceph'}}
timeout_args: "--timeout {{ deploy_timeout }}"
# Pulled this out so we can hand these configs to the openstack overcloud node delete command
scale_extra_configs: "-e /usr/share/openstack-tripleo-heat-templates/environments/network-isolation.yaml -e /usr/share/openstack-tripleo-heat-templates/environments/net-single-nic-with-vlans.yaml -e ~/network-environment.yaml"
scale_extra_args: "--{{ node_to_scale }}-scale {{ final_scale_value }} {{ scale_extra_configs }} --ntp-server pool.ntp.org"

# Scale deployment info
node_to_scale: compute # Type of node to scale
initial_scale_value: 1 # Initial number of nodes to deploy
final_scale_value: 2   # Number of additional nodes to add during the scale

# Scale deployment arguments
scale_args: >-
  {{ libvirt_args }}
  {{ flavor_args }}
  {{ timeout_args }}
  {{ scale_extra_args }}

License

Apache

Author Information

RDO-CI Team

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