ceph-ansible/infrastructure-playbooks/shrink-osd.yml

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---
# This playbook shrinks Ceph OSDs.
# It can remove any number of OSD(s) from the cluster and ALL THEIR DATA
#
# Use it like this:
# ansible-playbook shrink-osd.yml -e osd_id=0,2,6
# Prompts for confirmation to shrink, defaults to no and
# doesn't shrink the cluster. yes shrinks the cluster.
#
# ansible-playbook -e ireallymeanit=yes|no shrink-osd.yml
# Overrides the prompt using -e option. Can be used in
# automation scripts to avoid interactive prompt.
- name: confirm whether user really meant to remove osd(s) from the cluster
hosts:
- localhost
gather_facts: false
become: true
vars_prompt:
- name: ireallymeanit
prompt: Are you sure you want to shrink the cluster?
default: 'no'
private: no
tasks:
- include_vars: roles/ceph-common/defaults/main.yml
- include_vars: group_vars/all.yml
- name: exit playbook, if user did not mean to shrink cluster
fail:
msg: "Exiting shrink-osd playbook, no osd(s) was/were removed..
To shrink the cluster, either say 'yes' on the prompt or
or use `-e ireallymeanit=yes` on the command line when
invoking the playbook"
when: ireallymeanit != 'yes'
- name: exit playbook, if no osd(s) was/were given
fail:
msg: "osd_ids must be declared
Exiting shrink-osd playbook, no OSD()s was/were removed.
On the command line when invoking the playbook, you can use
-e osd_ids=0,1,2,3 argument."
when: osd_ids is not defined
- name: test if ceph command exist
command: command -v ceph
changed_when: false
failed_when: false
register: ceph_command
- name: exit playbook, if ceph command does not exist
debug:
msg: "The ceph command is not available, please install it :("
run_once: true
when:
- ceph_command.rc != 0
- name: exit playbook, if cluster files do not exist
stat:
path: "{{ item }}"
register: ceph_conf_key
with_items:
- /etc/ceph/{{ cluster }}.conf
- /etc/ceph/{{ cluster }}.client.admin.keyring
failed_when: false
- fail:
msg: "Ceph's configuration file is not present in /etc/ceph"
with_items: "{{ ceph_conf_key.results }}"
when:
- item.stat.exists == false
- name: exit playbook, if can not connect to the cluster
command: timeout 5 ceph --cluster {{ cluster }} health
register: ceph_health
until: ceph_health.stdout.find("HEALTH") > -1
retries: 5
delay: 2
# NOTE (leseb): just in case, the complex filters mechanism below does not work anymore.
# This will be a quick and easy fix but will require using the shell module.
# - name: find the host where the osd(s) is/are running on
# shell: |
# ceph --cluster {{ cluster }} osd find {{ item }} | grep -Po '(?<="ip": ")[^:]*'
# with_items: "{{osd_ids.split(',')}}"
# register: osd_hosts
#
- name: find the host where the osd(s) is/are running on
command: ceph --cluster {{ cluster }} osd find {{ item }}
with_items: "{{ osd_ids.split(',') }}"
register: osd_hosts
- set_fact: ip_item="{{(item.stdout | from_json).ip}}"
with_items: "{{ osd_hosts.results }}"
register: ip_result
- set_fact: ips="{{ ip_result.results | map(attribute='ansible_facts.ip_item') | list }}"
- set_fact: real_ips="{{ ips | regex_replace(':[0-9][0-9][0-9][0-9]\/[0-9]+', '') }}"
- name: check if ceph admin key exists on the osd nodes
stat:
path: "/etc/ceph/{{ cluster }}.client.admin.keyring"
register: ceph_admin_key
with_items: "{{ real_ips }}"
delegate_to: "{{ item }}"
failed_when: false
- fail:
msg: "The Ceph admin key is not present on the OSD node, please add it and remove it after the playbook is done."
with_items: "{{ ceph_admin_key.results }}"
when:
- item.stat.exists == false
- name: deactivating osd(s)
command: ceph-disk deactivate --cluster {{ cluster }} --deactivate-by-id {{ item.0 }} --mark-out
register: deactivate
ignore_errors: yes
with_together:
- "{{ osd_ids.split(',') }}"
- "{{ real_ips }}"
delegate_to: "{{ item.1 }}"
- name: set osd(s) out when ceph-disk deactivating fail
command: ceph --cluster {{ cluster }} osd out osd.{{ item.0 }}
with_together:
- "{{ osd_ids.split(',') }}"
- "{{ deactivate.results }}"
when:
- item.1.stderr|length > 0
- name: destroying osd(s)
command: ceph-disk destroy --cluster {{ cluster }} --destroy-by-id {{ item.0 }} --zap
register: destroy
ignore_errors: yes
with_together:
- "{{ osd_ids.split(',') }}"
- "{{ real_ips }}"
delegate_to: "{{ item.1 }}"
- name: remove osd(s) from crush_map when ceph-disk destroy fail
command: ceph --cluster {{ cluster }} osd crush remove osd.{{ item.0 }}
with_together:
- "{{ osd_ids.split(',') }}"
- "{{ destroy.results }}"
when:
- item.1.stderr|length > 0
- name: delete osd(s) auth key when ceph-disk destroy fail
command: ceph --cluster {{ cluster }} auth del osd.{{ item.0 }}
with_together:
- "{{ osd_ids.split(',') }}"
- "{{ destroy.results }}"
when:
- item.1.stderr|length > 0
- name: deallocate osd(s) id when ceph-disk destroy fail
command: ceph --cluster {{ cluster }} osd rm {{ item.0 }}
with_together:
- "{{ osd_ids.split(',') }}"
- "{{ destroy.results }}"
when:
- item.1.stderr|length > 0