rolling_update.yml

---
# This playbook does a rolling update for all the Ceph services
# Change the value of serial: to adjust the number of server to be updated.
#
# The four roles that apply to the ceph hosts will be applied: ceph-common,
# ceph-mon, ceph-osd and ceph-mds. So any changes to configuration, package updates, etc,
# will be applied as part of the rolling update process.
#

# /!\ DO NOT FORGET TO CHANGE THE RELEASE VERSION FIRST! /!\

- hosts: all
  tasks:
    - debug: msg="gather facts on all hosts for following reference"

- hosts: mons
  serial: 1
  sudo: True

  pre_tasks:
    - name: Compress the store as much as possible
      command: ceph tell mon.{{ ansible_hostname }} compact

  roles:
    - ceph-common
    - ceph-mon

  post_tasks:
    - name: Check if sysvinit
      stat: >
        path=/var/lib/ceph/mon/ceph-{{ ansible_hostname }}/sysvinit
      register: monsysvinit

    - name: Check if upstart
      stat: >
        path=/var/lib/ceph/mon/ceph-{{ ansible_hostname }}/upstart
      register: monupstart

    - name: Restart the monitor after compaction (Upstart)
      service: >
        name=ceph-mon
        state=restarted
        args=id={{ ansible_hostname }}
      when: monupstart.stat.exists == True

    - name: Restart the monitor after compaction (Sysvinit)
      service: >
        name=ceph
        state=restarted
        args=mon
      when: monsysvinit.stat.exists == True

    - name: restart monitor(s)
      service: >
        name=ceph
        state=restarted
        args=mon

    - name: select a running monitor
      set_fact: mon_host={{ item }}
      with_items: groups.mons
      when: item != inventory_hostname

    - name: Waiting for the monitor to join the quorum...
      shell: >
        ceph -s | grep monmap | sed 's/.*quorum//' | egrep -sq {{ ansible_hostname }}
      register: result
      until: result.rc == 0
      retries: 5
      delay: 10
      delegate_to: "{{ mon_host }}"


- hosts: osds
  serial: 1
  sudo: True

  pre_tasks:
    - name: Set OSD flags
      command: ceph osd set {{ item }}
      with_items:
        - noout
        - noscrub
        - nodeep-scrub
      delegate_to: "{{ groups.mons[0] }}"

  roles:
    - ceph-common
    - ceph-osd

  post_tasks:
    - name: Check if sysvinit
      shell: stat /var/lib/ceph/osd/ceph-*/sysvinit
      register: osdsysvinit
      failed_when: false

    - name: Check if upstart
      shell: stat /var/lib/ceph/osd/ceph-*/upstart
      register: osdupstart
      failed_when: false

    - name: Gracefully stop the OSDs (Upstart)
      service: >
        name=ceph-osd-all
        state=restarted
      when: osdupstart.rc == 0

    - name: Gracefully stop the OSDs (Sysvinit)
      service: >
        name=ceph
        state=restarted
        args=osd
      when: osdsysvinit.rc == 0

    - name: Waiting for clean PGs...
      shell: >
        test "$(ceph pg stat | sed 's/^.*pgs://;s/active+clean.*//;s/ //')" -eq "$(ceph pg stat | sed 's/pgs.*//;s/^.*://;s/ //')" && ceph health | egrep -sq "HEALTH_OK|HEALTH_WARN"
      register: result
      until: result.rc == 0
      retries: 10
      delay: 10
      delegate_to: "{{ groups.mons[0] }}"

    - name: Unset OSD flags
      command: ceph osd unset {{ item }}
      with_items:
        - noout
        - noscrub
        - nodeep-scrub
      delegate_to: "{{ groups.mons[0] }}"


- hosts: mdss
  serial: 1
  sudo: True

  roles:
    - ceph-common
    - ceph-mds

  post_tasks:
    - name: Check if sysvinit
      stat: >
        path=/var/lib/ceph/mon/ceph-{{ ansible_hostname }}/sysvinit
      register: mdssysvinit

    - name: Check if upstart
      stat: >
        path=/var/lib/ceph/mon/ceph-{{ ansible_hostname }}/upstart
      register: mdsupstart

    - name: Restart the metadata server (Upstart)
      service: >
        name=ceph-mds
        state=restarted
        args=id={{ ansible_hostname }}
      when: mdsupstart.stat.exists == True

    - name: Restart the metadata server (Sysvinit)
      service: >
        name=ceph
        state=restarted
        args=mds
      when: mdssysvinit.stat.exists == True


- hosts: rgws
  serial: 1
  sudo: True

  roles:
    - ceph-common
    - ceph-rgw

  post_tasks:
    - name: restart rados gateway server(s)
      service: >
        name={{ item }}
        state=restarted
      with_items:
        - radosgw
      when: radosgw_frontend == 'civetweb'

    - name: restart rados gateway server(s)
      service: >
        name={{ item }}
        state=restarted
      with_items:
        - apache2
        - radosgw
      when: radosgw_frontend == 'apache'