okd/playbooks/common/openshift-etcd/migrate.yml

---
- include: ../openshift-cluster/evaluate_groups.yml
  tags:
  - always

- name: Run pre-checks
  hosts: oo_etcd_to_migrate
  tags:
  - always
  roles:
  - role: etcd_migrate
    r_etcd_migrate_action: check
    r_etcd_common_embedded_etcd: "{{ groups.oo_etcd_to_config | default([]) | length == 0 }}"
    etcd_peer: "{{ ansible_default_ipv4.address }}"

- include: ../openshift-cluster/initialize_facts.yml
  tags:
  - always

- name: Prepare masters for etcd data migration
  hosts: oo_masters_to_config
  tasks:
  - set_fact:
      master_services:
      - "{{ openshift.common.service_type + '-master' }}"
  - set_fact:
      master_services:
      - "{{ openshift.common.service_type + '-master-controllers' }}"
      - "{{ openshift.common.service_type + '-master-api' }}"
    when:
    - (openshift_master_cluster_method is defined and openshift_master_cluster_method == "native") or openshift.common.is_master_system_container | bool
  - debug:
      msg: "master service name: {{ master_services }}"
  - name: Stop masters
    service:
      name: "{{ item }}"
      state: stopped
    with_items: "{{ master_services }}"

- name: Backup v2 data
  hosts: oo_etcd_to_migrate
  gather_facts: no
  tags:
  - always
  roles:
  - role: openshift_facts
  - role: etcd_common
    r_etcd_common_action: backup
    r_etcd_common_etcd_runtime: "{{ openshift.common.etcd_runtime }}"
    r_etcd_common_backup_tag: pre-migration
    r_etcd_common_embedded_etcd: "{{ groups.oo_etcd_to_config | default([]) | length == 0 }}"
    r_etcd_common_backup_sufix_name: "{{ lookup('pipe', 'date +%Y%m%d%H%M%S') }}"

- name: Gate on etcd backup
  hosts: localhost
  connection: local
  become: no
  tasks:
  - set_fact:
      etcd_backup_completed: "{{ hostvars
                                 | oo_select_keys(groups.oo_etcd_to_migrate)
                                 | oo_collect('inventory_hostname', {'r_etcd_common_backup_complete': true}) }}"
  - set_fact:
      etcd_backup_failed: "{{ groups.oo_etcd_to_migrate | difference(etcd_backup_completed) }}"
  - fail:
      msg: "Migration cannot continue. The following hosts did not complete etcd backup: {{ etcd_backup_failed | join(',') }}"
    when:
    - etcd_backup_failed | length > 0

- name: Migrate etcd data from v2 to v3
  hosts: oo_etcd_to_migrate
  gather_facts: no
  tags:
  - always
  roles:
  - role: etcd_migrate
    r_etcd_migrate_action: migrate
    r_etcd_common_embedded_etcd: "{{ groups.oo_etcd_to_config | default([]) | length == 0 }}"
    etcd_peer: "{{ ansible_default_ipv4.address }}"

- name: Gate on etcd migration
  hosts: oo_masters_to_config
  gather_facts: no
  tasks:
  - set_fact:
      etcd_migration_completed: "{{ hostvars
                                 | oo_select_keys(groups.oo_etcd_to_migrate)
                                 | oo_collect('inventory_hostname', {'r_etcd_migrate_success': true}) }}"
  - set_fact:
      etcd_migration_failed: "{{ groups.oo_etcd_to_migrate | difference(etcd_migration_completed) }}"

- name: Configure masters if etcd data migration is succesfull
  hosts: oo_masters_to_config
  roles:
  - role: etcd_migrate
    r_etcd_migrate_action: configure
    when: etcd_migration_failed | length == 0
  tasks:
  - debug:
      msg: "Skipping master re-configuration since migration failed."
    when:
    - etcd_migration_failed | length > 0

- name: Start masters after etcd data migration
  hosts: oo_masters_to_config
  tasks:
  - name: Start master services
    service:
      name: "{{ item }}"
      state: started
    register: service_status
    # Sometimes the master-api, resp. master-controllers fails to start for the first time
    until: service_status.state is defined and service_status.state == "started"
    retries: 5
    delay: 10
    with_items: "{{ master_services[::-1] }}"
  - fail:
      msg: "Migration failed. The following hosts were not properly migrated: {{ etcd_migration_failed | join(',') }}"
    when:
    - etcd_migration_failed | length > 0