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---
# Get the needed information about the current deployment
- hosts: masters[0]
tasks:
- name: Get number of app nodes
shell: oc get nodes -l autoscaling=app --no-headers=true | wc -l
register: oc_old_num_nodes
- name: Get names of app nodes
shell: oc get nodes -l autoscaling=app --no-headers=true | cut -f1 -d " "
register: oc_old_app_nodes
- hosts: localhost
tasks:
# Since both number and names of app nodes are to be removed
# localhost variables for these values need to be set
- name: Store old number and names of app nodes locally (if there is an existing deployment)
when: '"masters" in groups'
register: set_fact_result
set_fact:
oc_old_num_nodes: "{{ hostvars[groups['masters'][0]]['oc_old_num_nodes'].stdout }}"
oc_old_app_nodes: "{{ hostvars[groups['masters'][0]]['oc_old_app_nodes'].stdout_lines }}"
- name: Set default values for old app nodes (if there is no existing deployment)
when: 'set_fact_result | skipped'
set_fact:
oc_old_num_nodes: 0
oc_old_app_nodes: []
# Set how many nodes are to be added (1 by default)
- name: Set how many nodes are to be added
set_fact:
increment_by: 1
- name: Check that the number corresponds to scaling up (not down)
assert:
that: 'increment_by | int >= 1'
msg: >
FAIL: The value of increment_by must be at least 1
(but it is {{ increment_by | int }}).
- name: Update openstack_num_nodes variable
set_fact:
openstack_num_nodes: "{{ oc_old_num_nodes | int + increment_by | int }}"
# Run provision.yaml with higher number of nodes to create a new app-node VM
- include: provision.yaml
# Run config.yml to perform openshift installation
# Path to openshift-ansible can be customised:
# - the value of openshift_ansible_dir has to be an absolute path
# - the path cannot contain the '/' symbol at the end
# Creating a new deployment by the full installation
- include: "{{ openshift_ansible_dir }}/playbooks/byo/config.yml"
vars:
openshift_ansible_dir: ../../../../openshift-ansible
when: 'not groups["new_nodes"] | list'
# Scaling up existing deployment
- include: "{{ openshift_ansible_dir }}/playbooks/byo/openshift-node/scaleup.yml"
vars:
openshift_ansible_dir: ../../../../openshift-ansible
when: 'groups["new_nodes"] | list'
# Post-verification: Verify new number of nodes
- hosts: masters[0]
tasks:
- name: Get number of nodes
shell: oc get nodes -l autoscaling=app --no-headers=true | wc -l
register: oc_new_num_nodes
- name: Check that the actual result matches the defined value
assert:
that: 'oc_new_num_nodes.stdout | int == (hostvars["localhost"]["oc_old_num_nodes"] | int + hostvars["localhost"]["increment_by"] | int)'
msg: >
FAIL: Number of application nodes has not been increased accordingly
(it should be {{ hostvars["localhost"]["oc_old_num_nodes"] | int + hostvars["localhost"]["increment_by"] | int }}
but it is {{ oc_new_num_nodes.stdout | int }}).
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