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shrink-rgw: refact global workflow 

Instead of running the ceph roles against localhost we should do it
on the first mon.
The ansible and inventory hostname of the rgw nodes could be different.
Ensure that the rgw instance to remove is present in the cluster.
Fix rgw service and directory path.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1677431

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>
(cherry picked from commit 747555dfa6)
pull/4910/head
Dimitri Savineau 2020-01-09 11:48:13 -05:00 committed by Guillaume Abrioux
parent d6da508a9b
commit 84276f2fe3
1 changed files with 62 additions and 64 deletions
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102
infrastructure-playbooks/shrink-rgw.yml
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@ -11,60 +11,26 @@
# automation scripts to avoid interactive prompt.
- name: gather facts and check the init system
hosts:
- "{{ mon_group_name | default('mons') }}"
- "{{ rgw_group_name | default('rgws') }}"
become: true
tasks:
- debug:
msg: gather facts on MONS and RGWs
- name: confirm whether user really meant to remove rgw from the ceph cluster
hosts: localhost
become: true
become: false
gather_facts: false
vars_prompt:
- name: ireallymeanit
prompt: Are you sure you want to shrink the cluster?
default: 'no'
private: no
pre_tasks:
- import_role:
name: ceph-defaults
- import_role:
name: ceph-facts
tasks:
- name: exit playbook, if no rgw was given
when: rgw_to_kill is not defined
when: rgw_to_kill is not defined or rgw_to_kill | length == 0
fail:
msg: >
rgw_to_kill must be declared.
Exiting shrink-cluster playbook, no RGW was removed. On the command
line when invoking the playbook, you can use
"-e rgw_to_kill=ceph-rgw0 argument". You can only remove a single
"-e rgw_to_kill=ceph.rgw0 argument". You can only remove a single
RGW each time the playbook runs.
- name: get rgw hostname
set_fact:
rgw_to_kill_hostname: "{{ rgw_to_kill.split('.')[0] }}"
- name: get rgw instance
set_fact:
rgw_to_kill_instance: "{{ rgw_to_kill.split('.')[1] }}"
- name: exit if supplied hostname didnt match actual hostname
fail:
msg: supplied hostname didn't match with actual hostname
when: hostvars[rgw_to_kill_hostname]['ansible_hostname'] != rgw_to_kill_hostname
- name: exit playbook, if the rgw is not part of the inventory
when: rgw_to_kill_hostname not in groups[rgw_group_name]
fail:
msg: >
It seems that the host given is not part of your inventory, please
make sure it is.
- name: exit playbook, if user did not mean to shrink cluster
when: ireallymeanit != 'yes'
fail:
@ -73,42 +39,76 @@
cluster, either say 'yes' on the prompt or use
'-e ireallymeanit=yes' on the command line when invoking the playbook
- name: gather facts and mons and rgws
hosts:
- "{{ mon_group_name | default('mons') }}[0]"
- "{{ rgw_group_name | default('rgws') }}"
become: true
gather_facts: false
tasks:
- setup:
- hosts: mons[0]
become: true
gather_facts: false
pre_tasks:
- import_role:
name: ceph-defaults
- import_role:
name: ceph-facts
tasks_from: container_binary
- name: set_fact container_exec_cmd for mon0
when: containerized_deployment | bool
set_fact:
container_exec_cmd: "{{ container_binary }} exec ceph-mon-{{hostvars[groups[mon_group_name][0]]['ansible_hostname'] }}"
container_exec_cmd: "{{ container_binary }} exec ceph-mon-{{ ansible_hostname }}"
when: containerized_deployment | bool
- name: exit playbook, if can not connect to the cluster
command: "{{ container_exec_cmd | default('') }} timeout 5 ceph --cluster {{ cluster }} health"
register: ceph_health
until: ceph_health is succeeded
delegate_to: "{{ groups[mon_group_name][0] }}"
retries: 5
delay: 2
- name: get rgw instances
command: "{{ container_exec_cmd | default('') }} ceph --cluster {{ cluster }} -s -f json"
register: rgw_instances
- name: exit playbook, if the rgw_to_kill doesn't exist
when: rgw_to_kill not in (rgw_instances.stdout | from_json).servicemap.services.rgw.daemons.keys() | list
fail:
msg: >
It seems that the rgw instance given is not part of the ceph cluster. Please
make sure it is.
The rgw instance format is $(hostname}.rgw$(instance number).
tasks:
- name: stop rgw service and verify it
block:
- name: get rgw host running the rgw instance to kill
set_fact:
rgw_host: '{{ item }}'
with_items: '{{ groups[rgw_group_name] }}'
when: hostvars[item]['ansible_hostname'] == rgw_to_kill.split('.')[0]
- name: stop rgw service
service:
name: ceph-radosgw@rgw.{{ rgw_to_kill }}
state: stopped
enabled: no
delegate_to: "{{ rgw_to_kill_hostname }}"
delegate_to: "{{ rgw_host }}"
failed_when: false
- name: ensure that the rgw is stopped
command: "systemctl is-active ceph_rgw@rgw.{{ rgw_to_kill }}"
command: "systemctl is-active ceph-radosgw@rgw.{{ rgw_to_kill }}"
register: rgw_to_kill_status
failed_when: rgw_to_kill_status.rc == 0
delegate_to: "{{ rgw_to_kill_hostname }}"
delegate_to: "{{ rgw_host }}"
retries: 5
delay: 2
- name: exit if rgw_to_kill is reported in ceph status
command: "{{ container_exec_cmd | default('') }} ceph --cluster {{ cluster }} -s -f json"
register: ceph_status
delegate_to: "{{ groups[mon_group_name][0] }}"
failed_when:
- (ceph_status.stdout | from_json).servicemap.services.rgw is defined
- rgw_to_kill in (ceph_status.stdout | from_json).servicemap.services.rgw.daemons.keys() | list
@ -120,11 +120,9 @@
- name: purge directories related to rgw
file:
path: /var/lib/ceph/radosgw/{{ cluster }}-{{ rgw_to_kill_hostname }}
path: /var/lib/ceph/radosgw/{{ cluster }}-rgw.{{ rgw_to_kill }}
state: absent
delegate_to: "{{ rgw_to_kill_hostname }}"
delegate_to: "{{ rgw_host }}"
post_tasks:
- name: show ceph health
command: "{{ container_exec_cmd | default('')}} ceph --cluster {{ cluster }} -s"
delegate_to: "{{ groups[mon_group_name][0] }}"