okd/playbooks/common/openshift-cluster/upgrades/upgrade_nodes.yml

---
- name: Drain and upgrade nodes
  hosts: oo_nodes_to_upgrade:!oo_masters_to_config
  # This var must be set with -e on invocation, as it is not a per-host inventory var
  # and is evaluated early. Values such as "20%" can also be used.
  serial: "{{ openshift_upgrade_nodes_serial | default(1) }}"
  any_errors_fatal: true

  pre_tasks:
  # TODO: To better handle re-trying failed upgrades, it would be nice to check if the node
  # or docker actually needs an upgrade before proceeding. Perhaps best to save this until
  # we merge upgrade functionality into the base roles and a normal config.yml playbook run.
  - name: Determine if node is currently scheduleable
    command: >
      {{ hostvars[groups.oo_first_master.0].openshift.common.client_binary }} get node {{ openshift.node.nodename | lower }} -o json
    register: node_output
    delegate_to: "{{ groups.oo_first_master.0 }}"
    changed_when: false

  - set_fact:
      was_schedulable: "{{ 'unschedulable' not in (node_output.stdout | from_json).spec }}"

  - name: Mark node unschedulable
    command: >
      {{ hostvars[groups.oo_first_master.0].openshift.common.client_binary }} adm manage-node {{ openshift.node.nodename | lower }} --schedulable=false
    delegate_to: "{{ groups.oo_first_master.0 }}"
    # NOTE: There is a transient "object has been modified" error here, allow a couple
    # retries for a more reliable upgrade.
    register: node_unsched
    until: node_unsched.rc == 0
    retries: 3
    delay: 1

  - name: Drain Node for Kubelet upgrade
    command: >
      {{ hostvars[groups.oo_first_master.0].openshift.common.admin_binary }} drain {{ openshift.node.nodename | lower }} --force --delete-local-data
    delegate_to: "{{ groups.oo_first_master.0 }}"

  roles:
  - openshift_facts
  - docker
  - openshift_node_upgrade

  post_tasks:
  - name: Set node schedulability
    command: >
      {{ hostvars[groups.oo_first_master.0].openshift.common.client_binary }} adm manage-node {{ openshift.node.nodename | lower }} --schedulable=true
    delegate_to: "{{ groups.oo_first_master.0 }}"
    when: was_schedulable | bool
    register: node_sched
    until: node_sched.rc == 0
    retries: 3
    delay: 1

- include: ../reset_excluder.yml
  tags:
  - always