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rolling-metalogger.yml
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---
# This playbook restarts the metaloggers one by one and waits for each to come up before moving to the next.
# By default it only upgrades metaloggers that are healthy and out of date.
- name: Rolling restart of metaloggers
hosts: moosefs_metalogger
serial: 1
become: true
vars_files:
- "vars/moosefs-settings.yml"
- "vars/upgrade-settings.yml"
pre_tasks:
- name: Get MooseFS version
shell: "mfsmetalogger -v | cut -d' ' -f 2 | cut -d'-' -f 1"
register: moosefs_metalogger_version
check_mode: false
changed_when: false
- name: Set MooseFS version
set_fact:
moosefs_version: "{{ moosefs_metalogger_version.stdout }}"
- name: Check the list of connected metalogger servers using mfscli
command: mfscli -SMB -H {{ moosefs_master_host }} -p -s ' '
register: moosefs_metalogger_status_list
check_mode: false
changed_when: false
- name: debug
debug:
msg: "{{ moosefs_metalogger_status_list.stdout_lines | select('search', inventory_hostname) }}"
- name: Determine the current state of the metalogger
set_fact:
moosefs_metalogger_connected: "{{ moosefs_metalogger_status_list.stdout_lines | select('search', inventory_hostname) | length != 0 }}"
moosefs_metalogger_version_match: "{{ moosefs_metalogger_status_list.stdout_lines | select('search', inventory_hostname) | select('search', moosefs_version) | length != 0 }}"
moosefs_metalogger_upgrade_needed: "{{ moosefs_metalogger_status_list.stdout_lines | select('search', inventory_hostname) | select('search', moosefs_version) | length == 0 }}"
- name: Die if metalogger not currently connected
assert:
that:
- moosefs_metalogger_connected == true
fail_msg: "Metalogger not connected."
success_msg: "Metalogger connected, continuing..."
- name: Print the current state of the metalogger
debug:
msg:
- "Connected? {{ moosefs_metalogger_connected }}"
- "Version matches target? {{ moosefs_metalogger_version_match }}"
- "Upgrade needed? {{ moosefs_metalogger_upgrade_needed }}"
tasks:
- name: Restart metalogger service
service:
name: moosefs-metalogger
state: restarted
when:
- moosefs_restart_metaloggers
- moosefs_metalogger_upgrade_needed or moosefs_restart_metaloggers_force
- not moosefs_pro
- name: Stop CE metalogger service (PRO)
service:
name: moosefs-metalogger
state: stopped
when:
- moosefs_restart_metaloggers
- moosefs_metalogger_upgrade_needed or moosefs_restart_metaloggers_force
- moosefs_upgrade
- moosefs_pro
- name: Restart metalogger service (PRO)
service:
name: moosefs-pro-metalogger
state: restarted
when:
- moosefs_restart_metaloggers
- moosefs_metalogger_upgrade_needed or moosefs_restart_metaloggers_force
- moosefs_pro
post_tasks:
- name: Wait until this metalogger is connected
command: mfscli -SMB -H {{ moosefs_master_host }} -p -s ' '
register: moosefs_metalogger_status
check_mode: false
changed_when: false
retries: 1800
until: moosefs_metalogger_status.stdout_lines | select('search', inventory_hostname) | length != 0
- name: Check the list of connected metalogger servers using mfscli
command: mfscli -SMB -H {{ moosefs_master_host }} -p -s ' '
register: moosefs_metalogger_status_list
check_mode: false
changed_when: false
- name: Determine the current state of the metalogger
set_fact:
moosefs_metalogger_connected: "{{ moosefs_metalogger_status_list.stdout_lines | select('search', inventory_hostname) | length != 0 }}"
moosefs_metalogger_version_match: "{{ moosefs_metalogger_status_list.stdout_lines | select('search', inventory_hostname) | select('search', moosefs_version) | length != 0 }}"
moosefs_metalogger_upgrade_needed: "{{ moosefs_metalogger_status_list.stdout_lines | select('search', inventory_hostname) | select('search', moosefs_version) | length == 0 }}"
- name: Print the current state of the metalogger
debug:
msg:
- "Connected? {{ moosefs_metalogger_connected }}"
- "Version matches target? {{ moosefs_metalogger_version_match }}"
- "Upgrade needed? {{ moosefs_metalogger_upgrade_needed }}"
- name: Prevent moving on if there was an issue
assert:
that:
- moosefs_metalogger_connected
- moosefs_metalogger_version_match
- not moosefs_metalogger_upgrade_needed