ceph-ansible/infrastructure-playbooks/take-over-existing-cluster.yml

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---
# NOTE (leseb):
2016-05-16 11:51:12 +08:00
# The playbook aims to takeover a cluster that was not configured with
# ceph-ansible.
#
2016-05-16 11:51:12 +08:00
# The procedure is as follows:
#
# 1. Install Ansible and add your monitors and osds hosts in it. For more detailed information you can read the [Ceph Ansible Wiki](https://github.com/ceph/ceph-ansible/wiki)
# 2. Set `generate_fsid: false` in `group_vars`
# 3. Get your current cluster fsid with `ceph fsid` and set `fsid` accordingly in `group_vars`
# 4. Run the playbook called: `take-over-existing-cluster.yml` like this `ansible-playbook take-over-existing-cluster.yml`.
# 5. Eventually run Ceph Ansible to validate everything by doing: `ansible-playbook site.yml`.
- hosts: mons
become: True
vars_files:
- roles/ceph-defaults/defaults/main.yml
- group_vars/all.yml
roles:
- ceph-defaults
- ceph-fetch-keys
- hosts: all
become: true
tasks:
- include_vars: roles/ceph-defaults/defaults/main.yml
- include_vars: group_vars/all.yml
- name: get the name of the existing ceph cluster
shell: |
basename $(grep --exclude '*.bak' -R fsid /etc/ceph/ | egrep -o '^[^.]*')
changed_when: false
register: cluster_name
- name: "stat {{ cluster_name.stdout }}.conf"
stat:
path: "/etc/ceph/{{ cluster_name.stdout }}.conf"
register: ceph_conf_stat
# Creates a backup of original ceph conf file in 'cluster_name-YYYYMMDDTHHMMSS.conf.bak' format
- name: "make a backup of original {{ cluster_name.stdout }}.conf"
copy:
src: "/etc/ceph/{{ cluster_name.stdout }}.conf"
dest: "/etc/ceph/{{ cluster_name.stdout }}-{{ ansible_date_time.iso8601_basic_short }}.conf.bak"
remote_src: true
owner: "{{ ceph_conf_stat.stat.pw_name }}"
group: "{{ ceph_conf_stat.stat.gr_name }}"
mode: "{{ ceph_conf_stat.stat.mode }}"
- name: generate ceph configuration file
action: config_template
args:
src: "roles/ceph-common/templates/ceph.conf.j2"
dest: "/etc/ceph/{{ cluster_name.stdout }}.conf"
owner: "{{ ceph_conf_stat.stat.pw_name }}"
group: "{{ ceph_conf_stat.stat.gr_name }}"
mode: "{{ ceph_conf_stat.stat.mode }}"
config_overrides: "{{ ceph_conf_overrides }}"
config_type: ini