okd/roles/openshift_master/tasks/upgrade/upgrade_scheduler.yml

---
# Upgrade predicates
- vars:
    # openshift_master_facts_default_predicates is a custom lookup plugin in
    # role lib_utils
    prev_predicates: "{{ lookup('openshift_master_facts_default_predicates', short_version=openshift_upgrade_min, deployment_type=openshift_deployment_type) }}"
    prev_predicates_no_region: "{{ lookup('openshift_master_facts_default_predicates', short_version=openshift_upgrade_min, deployment_type=openshift_deployment_type, regions_enabled=False) }}"
    default_predicates_no_region: "{{ lookup('openshift_master_facts_default_predicates', regions_enabled=False) }}"
    # older_predicates are the set of predicates that have previously been
    # hard-coded into openshift_facts
    older_predicates:
    - - name: MatchNodeSelector
      - name: PodFitsResources
      - name: PodFitsPorts
      - name: NoDiskConflict
      - name: NoVolumeZoneConflict
      - name: MaxEBSVolumeCount
      - name: MaxGCEPDVolumeCount
      - name: Region
        argument:
          serviceAffinity:
            labels:
            - region
    - - name: MatchNodeSelector
      - name: PodFitsResources
      - name: PodFitsPorts
      - name: NoDiskConflict
      - name: NoVolumeZoneConflict
      - name: Region
        argument:
          serviceAffinity:
            labels:
            - region
    - - name: MatchNodeSelector
      - name: PodFitsResources
      - name: PodFitsPorts
      - name: NoDiskConflict
      - name: Region
        argument:
          serviceAffinity:
            labels:
            - region
    # older_predicates_no_region are the set of predicates that have previously
    # been hard-coded into openshift_facts, with the Region predicate removed
    older_predicates_no_region:
    - - name: MatchNodeSelector
      - name: PodFitsResources
      - name: PodFitsPorts
      - name: NoDiskConflict
      - name: NoVolumeZoneConflict
      - name: MaxEBSVolumeCount
      - name: MaxGCEPDVolumeCount
    - - name: MatchNodeSelector
      - name: PodFitsResources
      - name: PodFitsPorts
      - name: NoDiskConflict
      - name: NoVolumeZoneConflict
    - - name: MatchNodeSelector
      - name: PodFitsResources
      - name: PodFitsPorts
      - name: NoDiskConflict
  block:

  # Handle case where openshift_master_predicates is defined
  - block:
    - debug:
        msg: "WARNING: openshift_master_scheduler_predicates is set to defaults from an earlier release of OpenShift current defaults are: {{ openshift_master_scheduler_default_predicates }}"
      when: openshift_master_scheduler_predicates in older_predicates + older_predicates_no_region + [prev_predicates] + [prev_predicates_no_region]

    - debug:
        msg: "WARNING: openshift_master_scheduler_predicates does not match current defaults of: {{ openshift_master_scheduler_default_predicates }}"
      when: openshift_master_scheduler_predicates != openshift_master_scheduler_default_predicates
    when: openshift_master_scheduler_predicates | default(none) is not none

  # Handle cases where openshift_master_predicates is not defined
  - block:
    - debug:
        msg: "WARNING: existing scheduler config does not match previous known defaults automated upgrade of scheduler config is disabled.\nexisting scheduler predicates: {{ openshift_master_scheduler_current_predicates }}\ncurrent scheduler default predicates are: {{ openshift_master_scheduler_default_predicates }}"
      when:
      - openshift_master_scheduler_current_predicates != openshift_master_scheduler_default_predicates
      - openshift_master_scheduler_current_predicates not in older_predicates + [prev_predicates]

    - set_fact:
        openshift_upgrade_scheduler_predicates: "{{ openshift_master_scheduler_default_predicates }}"
      when:
      - openshift_master_scheduler_current_predicates != openshift_master_scheduler_default_predicates
      - openshift_master_scheduler_current_predicates in older_predicates + [prev_predicates]

    - set_fact:
        openshift_upgrade_scheduler_predicates: "{{ default_predicates_no_region }}"
      when:
      - openshift_master_scheduler_current_predicates != default_predicates_no_region
      - openshift_master_scheduler_current_predicates in older_predicates_no_region + [prev_predicates_no_region]

    when: openshift_master_scheduler_predicates | default(none) is none


# Upgrade priorities
- vars:
    prev_priorities: "{{ lookup('openshift_master_facts_default_priorities', short_version=openshift_upgrade_min, deployment_type=openshift_deployment_type) }}"
    prev_priorities_no_zone: "{{ lookup('openshift_master_facts_default_priorities', short_version=openshift_upgrade_min, deployment_type=openshift_deployment_type, zones_enabled=False) }}"
    default_priorities_no_zone: "{{ lookup('openshift_master_facts_default_priorities', zones_enabled=False) }}"
    # older_priorities are the set of priorities that have previously been
    # hard-coded into openshift_facts
    older_priorities:
    - - name: LeastRequestedPriority
        weight: 1
      - name: SelectorSpreadPriority
        weight: 1
      - name: Zone
        weight: 2
        argument:
          serviceAntiAffinity:
            label: zone
    # older_priorities_no_region are the set of priorities that have previously
    # been hard-coded into openshift_facts, with the Zone priority removed
    older_priorities_no_zone:
    - - name: LeastRequestedPriority
        weight: 1
      - name: SelectorSpreadPriority
        weight: 1
  block:

  # Handle case where openshift_master_priorities is defined
  - block:
    - debug:
        msg: "WARNING: openshift_master_scheduler_priorities is set to defaults from an earlier release of OpenShift current defaults are: {{ openshift_master_scheduler_default_priorities }}"
      when: openshift_master_scheduler_priorities in older_priorities + older_priorities_no_zone + [prev_priorities] + [prev_priorities_no_zone]

    - debug:
        msg: "WARNING: openshift_master_scheduler_priorities does not match current defaults of: {{ openshift_master_scheduler_default_priorities }}"
      when: openshift_master_scheduler_priorities != openshift_master_scheduler_default_priorities
    when: openshift_master_scheduler_priorities | default(none) is not none

  # Handle cases where openshift_master_priorities is not defined
  - block:
    - debug:
        msg: "WARNING: existing scheduler config does not match previous known defaults automated upgrade of scheduler config is disabled.\nexisting scheduler priorities: {{ openshift_master_scheduler_current_priorities }}\ncurrent scheduler default priorities are: {{ openshift_master_scheduler_default_priorities }}"
      when:
      - openshift_master_scheduler_current_priorities != openshift_master_scheduler_default_priorities
      - openshift_master_scheduler_current_priorities not in older_priorities + [prev_priorities]

    - set_fact:
        openshift_upgrade_scheduler_priorities: "{{ openshift_master_scheduler_default_priorities }}"
      when:
      - openshift_master_scheduler_current_priorities != openshift_master_scheduler_default_priorities
      - openshift_master_scheduler_current_priorities in older_priorities + [prev_priorities]

    - set_fact:
        openshift_upgrade_scheduler_priorities: "{{ default_priorities_no_zone }}"
      when:
      - openshift_master_scheduler_current_priorities != default_priorities_no_zone
      - openshift_master_scheduler_current_priorities in older_priorities_no_zone + [prev_priorities_no_zone]

    when: openshift_master_scheduler_priorities | default(none) is none


# Update scheduler
- vars:
    scheduler_config:
      kind: Policy
      apiVersion: v1
      predicates: "{{ openshift_upgrade_scheduler_predicates
                      | default(openshift_master_scheduler_current_predicates) }}"
      priorities: "{{ openshift_upgrade_scheduler_priorities
                      | default(openshift_master_scheduler_current_priorities) }}"
  block:
  - name: Update scheduler config
    copy:
      content: "{{ scheduler_config | to_nice_json }}"
      dest: "{{ openshift_master_scheduler_conf }}"
      backup: true
  when: >
    openshift_upgrade_scheduler_predicates is defined or
    openshift_upgrade_scheduler_priorities is defined