diff --git a/infrastructure-playbooks/shrink-rgw.yml b/infrastructure-playbooks/shrink-rgw.yml new file mode 100644 index 000000000..ef70e1cb1 --- /dev/null +++ b/infrastructure-playbooks/shrink-rgw.yml @@ -0,0 +1,130 @@ +--- +# This playbook shrinks the Ceph RGW from your cluster +# +# Use it like this: +# ansible-playbook shrink-rgw.yml -e rgw_to_kill=ceph-rgw01 +# 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-rgw.yml +# Overrides the prompt using -e option. Can be used in +# 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 monitor from the ceph cluster + hosts: localhost + become: true + 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 + + - name: exit playbook, if no rgw was given + when: rgw_to_kill is not defined + 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 + 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: + msg: > + Exiting shrink-mon playbook, no monitor was removed. To shrink the + cluster, either say 'yes' on the prompt or use + '-e ireallymeanit=yes' on the command line when invoking the playbook + + - 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'] }}" + + - 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 + + tasks: + - name: stop rgw service and verify it + block: + - name: stop rgw service + service: + name: ceph-radosgw@rgw.{{ rgw_to_kill }} + state: stopped + enabled: no + delegate_to: "{{ rgw_to_kill_hostname }}" + failed_when: false + + - name: ensure that the rgw is stopped + command: "systemctl is-active ceph_rgw@rgw.{{ rgw_to_kill }}" + register: rgw_to_kill_status + failed_when: rgw_to_kill_status.rc == 0 + delegate_to: "{{ rgw_to_kill_hostname }}" + 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 + until: + - (ceph_status.stdout | from_json).servicemap.services.rgw is defined + - rgw_to_kill not in (ceph_status.stdout | from_json).servicemap.services.rgw.daemons.keys() | list + retries: 3 + delay: 3 + + - name: purge directories related to rgw + file: + path: /var/lib/ceph/radosgw/{{ cluster }}-{{ rgw_to_kill_hostname }} + state: absent + delegate_to: "{{ rgw_to_kill_hostname }}" + + post_tasks: + - name: show ceph health + command: "{{ container_exec_cmd | default('')}} ceph --cluster {{ cluster }} -s" + delegate_to: "{{ groups[mon_group_name][0] }}"