upgrade-whole-cluster-pre.yml

---
# This playbook optionally prints some useful information about the state of MooseFS prior to running upgrades.
# It is intended to be used before performing a whole cluster upgrade.
# WIP
- name: Run checks before an upgrade
  hosts: moosefs_master
  serial: 1
  become: true

  vars_files:
    - "vars/moosefs-settings.yml"
    - "vars/upgrade-settings.yml"

  pre_tasks:
    - name: Check the state of the chunk matrix
      command: mfscli -SIC -H {{ moosefs_master_host }} -p -s ' '
      register: moosefs_chunks_status
      check_mode: false
      changed_when: false
      when: inventory_hostname == ansible_play_hosts[0]

    - name: Check the state of the chunkservers
      command: mfscli -SCS -H {{ moosefs_master_host }} -p -s ' '
      register: moosefs_chunkserver_status
      check_mode: false
      changed_when: false
      when: inventory_hostname == ansible_play_hosts[0]

    - name: Determine the current state of the chunk matrix
      set_fact:
        moosefs_chunks_missing: "{{ moosefs_chunks_status.stdout_lines | select('search', 'chunkclass missing:') | select('search', ': 0') | length == 0 }}"
        moosefs_chunks_endangered: "{{ moosefs_chunks_status.stdout_lines | select('search', 'chunkclass endangered:') | select('search', ': 0') | length == 0 }}"
        moosefs_chunks_undergoal: "{{ moosefs_chunks_status.stdout_lines | select('search', 'chunkclass undergoal:') | select('search', ': 0') | length == 0 }}"
      when: inventory_hostname == ansible_play_hosts[0]

    - name: Print the current state of the chunk matrix
      debug:
        msg:
          - "Chunks missing? {{ moosefs_chunks_missing }}"
          - "Chunks endangered? {{ moosefs_chunks_endangered }}"
          - "Chunks undergoal? {{ moosefs_chunks_undergoal }}"
      when: inventory_hostname == ansible_play_hosts[0]