---
# This playbook purges the Ceph MGR Dashboard and Monitoring
# (alertmanager/prometheus/grafana/node-exporter) stack.
# It removes: packages, configuration files and ALL THE DATA
#
# Use it like this:
# ansible-playbook purge-dashboard.yml
#     Prompts for confirmation to purge, defaults to no and
#     doesn't purge anything. yes purges the dashboard and
#     monitoring stack.
#
# ansible-playbook -e ireallymeanit=yes|no purge-dashboard.yml
#     Overrides the prompt using -e option. Can be used in
#     automation scripts to avoid interactive prompt.

- name: confirm whether user really meant to purge the dashboard
  hosts: localhost
  gather_facts: false
  vars_prompt:
    - name: ireallymeanit
      prompt: Are you sure you want to purge the dashboard?
      default: 'no'
      private: no
  tasks:
    - name: exit playbook, if user did not mean to purge dashboard
      fail:
        msg: >
          "Exiting purge-dashboard playbook, dashboard was NOT purged.
           To purge the dashboard, either say 'yes' on the prompt or
           or use `-e ireallymeanit=yes` on the command line when
           invoking the playbook"
      when: ireallymeanit != 'yes'

- name: gather facts on all hosts
  hosts:
    - "{{ mon_group_name|default('mons') }}"
    - "{{ osd_group_name|default('osds') }}"
    - "{{ mds_group_name|default('mdss') }}"
    - "{{ rgw_group_name|default('rgws') }}"
    - "{{ rbdmirror_group_name|default('rbdmirrors') }}"
    - "{{ nfs_group_name|default('nfss') }}"
    - "{{ client_group_name|default('clients') }}"
    - "{{ mgr_group_name|default('mgrs') }}"
    - "{{ grafana_server_group_name | default('grafana-server') }}"
  become: true
  tasks:
    - debug: msg="gather facts on all Ceph hosts for following reference"

- name: purge node exporter
  hosts:
    - "{{ mon_group_name|default('mons') }}"
    - "{{ osd_group_name|default('osds') }}"
    - "{{ mds_group_name|default('mdss') }}"
    - "{{ rgw_group_name|default('rgws') }}"
    - "{{ rbdmirror_group_name|default('rbdmirrors') }}"
    - "{{ nfs_group_name|default('nfss') }}"
    - "{{ client_group_name|default('clients') }}"
    - "{{ mgr_group_name|default('mgrs') }}"
    - "{{ grafana_server_group_name | default('grafana-server') }}"
  gather_facts: false
  become: true
  tasks:
    - import_role:
        name: ceph-defaults

    - import_role:
        name: ceph-facts
        tasks_from: container_binary

    - name: disable node_exporter service
      service:
        name: node_exporter
        state: stopped
        enabled: no
      failed_when: false

    - name: remove node_exporter service files
      file:
        name: "{{ item }}"
        state: absent
      loop:
        - /etc/systemd/system/node_exporter.service
        - /run/node_exporter.service-cid

    - name: remove node-exporter image
      command: "{{ container_binary }} rmi {{ node_exporter_container_image }}"
      changed_when: false
      failed_when: false

- name: purge ceph monitoring
  hosts: "{{ grafana_server_group_name | default('grafana-server') }}"
  gather_facts: false
  become: true
  tasks:
    - import_role:
        name: ceph-defaults

    - import_role:
        name: ceph-facts
        tasks_from: container_binary

    - name: stop services
      service:
        name: "{{ item }}"
        state: stopped
        enabled: no
      failed_when: false
      loop:
        - alertmanager
        - prometheus
        - grafana-server

    - name: remove systemd service files
      file:
        name: "{{ item }}"
        state: absent
      loop:
        - /etc/systemd/system/alertmanager.service
        - /etc/systemd/system/prometheus.service
        - /etc/systemd/system/grafana-server.service
        - /run/alertmanager.service-cid
        - /run/prometheus.service-cid
        - /run/grafana-server.service-cid

    - name: remove ceph dashboard container images
      command: "{{ container_binary }} rmi {{ item }}"
      loop:
        - "{{ alertmanager_container_image }}"
        - "{{ prometheus_container_image }}"
        - "{{ grafana_container_image }}"
      changed_when: false
      failed_when: false

    - name: remove ceph-grafana-dashboards package on RedHat or SUSE
      package:
        name: ceph-grafana-dashboards
        state: absent
      when:
        - not containerized_deployment | bool
        - ansible_facts['os_family'] in ['RedHat', 'Suse']

    - name: remove data
      file:
        name: "{{ item }}"
        state: absent
      loop:
        - "{{ alertmanager_conf_dir }}"
        - "{{ prometheus_conf_dir }}"
        - /etc/grafana
        - "{{ alertmanager_data_dir }}"
        - "{{ prometheus_data_dir }}"
        - /var/lib/grafana

- name: purge ceph dashboard
  hosts: "{{ groups[mgr_group_name] | default(groups[mon_group_name]) | default(omit) }}"
  gather_facts: false
  become: true
  environment:
    CEPH_CONTAINER_IMAGE: "{{ ceph_docker_registry + '/' + ceph_docker_image + ':' + ceph_docker_image_tag if containerized_deployment | bool else None }}"
    CEPH_CONTAINER_BINARY: "{{ container_binary }}"
  tasks:
    - import_role:
        name: ceph-defaults

    - import_role:
        name: ceph-facts
        tasks_from: container_binary

    - name: set_fact ceph_cmd radosgw_cmd
      set_fact:
        ceph_cmd: "{{ hostvars[groups[mon_group_name][0]]['container_binary'] + ' run --net=host --rm -v /etc/ceph:/etc/ceph:z --entrypoint=ceph ' + ceph_docker_registry + '/' + ceph_docker_image + ':' + ceph_docker_image_tag if containerized_deployment | bool else 'ceph' }}"
        radosgw_cmd: "{{ hostvars[groups[mon_group_name][0]]['container_binary'] + ' run --net=host --rm -v /etc/ceph:/etc/ceph:z --entrypoint=radosgw-admin ' + ceph_docker_registry + '/' + ceph_docker_image + ':' + ceph_docker_image_tag if containerized_deployment | bool else 'radosgw-admin' }}"

    - name: remove the dashboard admin user
      command: "{{ ceph_cmd }} --cluster {{ cluster }} dashboard ac-user-delete {{ dashboard_admin_user }}"
      run_once: true
      changed_when: false
      failed_when: false
      delegate_to: "{{ groups[mon_group_name][0] }}"

    - name: remove radosgw system user
      command: "{{ radosgw_cmd }} --cluster {{ cluster }} user rm --uid={{ dashboard_rgw_api_user_id }}"
      run_once: true
      changed_when: false
      failed_when: false
      delegate_to: "{{ groups[mon_group_name][0] }}"
      when: groups.get(rgw_group_name, []) | length > 0

    - name: disable mgr dashboard and prometheus modules
      command: "{{ ceph_cmd }} --cluster {{ cluster }} mgr module disable {{ item }}"
      delegate_to: "{{ groups[mon_group_name][0] }}"
      run_once: true
      changed_when: false
      loop:
        - dashboard
        - prometheus

    - name: remove TLS certificate and key files
      file:
        name: "/etc/ceph/ceph-dashboard.{{ item }}"
        state: absent
      loop:
        - crt
        - key
      when: dashboard_protocol == "https"

    - name: remove ceph-mgr-dashboard package
      package:
        name: ceph-mgr-dashboard
        state: absent
      when: not containerized_deployment | bool