graceful_stop.yml

---
# Copyright 2016 PingCAP, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
# limitations under the License.

# The playbook of TiDB

- hosts: all
  tasks:
    - name: check ansible_play_batch
      fail:
        msg: "Only one host can be specified at a time when performing graceful stop."
      run_once: true
      when: ansible_play_batch | length != 1


- name: check config locally
  hosts: localhost
  any_errors_fatal: true
  tags:
    - always
  roles:
    - check_config_static

- name: gather all facts, and check dest
  hosts: all
  any_errors_fatal: true
  tags:
    - always
  roles:
    - check_config_dynamic


- hosts: monitored_servers
  tags:
    - node_exporter
  tasks:
    - name: stop node_exporter by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_{{ item }}.sh
      with_items:
        - node_exporter
      when: process_supervision == 'supervise'

    - name: stop node_exporter by systemd
      systemd: name={{ item }} state=stopped
      become: true
      when: process_supervision == 'systemd'
      with_items:
        - node_exporter-{{ node_exporter_port }}.service

    - name: wait until the node_exporter port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ node_exporter_port }}"
        state: stopped
        msg: "the node_exporter port {{ node_exporter_port }} is not down"


- hosts: monitored_servers
  tags:
    - blackbox_exporter
  tasks:
    - name: stop blackbox_exporter by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_{{ item }}.sh
      with_items:
        - blackbox_exporter
      when: process_supervision == 'supervise'

    - name: stop node_exporter/blackbox_exporter by systemd
      systemd: name={{ item }} state=stopped
      become: true
      when: process_supervision == 'systemd'
      with_items:
        - blackbox_exporter-{{ blackbox_exporter_port }}.service

    - name: wait until the blackbox_exporter port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ blackbox_exporter_port }}"
        state: stopped
        msg: "the blackbox_exporter port {{ blackbox_exporter_port }} is not down"


- hosts: alertmanager_servers
  tags:
    - alertmanager
  tasks:
    - name: stop alertmanager by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_alertmanager.sh
      when: process_supervision == 'supervise'

    - name: stop alertmanager by systemd
      systemd: name=alertmanager-{{ alertmanager_port }}.service state=stopped
      become: true
      when: process_supervision == 'systemd'

    - name: wait until the alertmanager port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ alertmanager_port }}"
        state: stopped
        msg: "the alertmanager port {{ alertmanager_port }} is not down"


- hosts: monitoring_servers
  tags:
    - pushgateway
  tasks:
    - name: stop pushgateway by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_{{ item }}.sh
      with_items:
        - pushgateway
      when: process_supervision == 'supervise'

    - name: stop pushgateway by systemd
      systemd: name={{ item }} state=stopped
      when: process_supervision == 'systemd'
      become: true
      with_items:
        - pushgateway-{{ pushgateway_port }}.service

    - name: wait until the pushgateway port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ pushgateway_port }}"
        state: stopped
        msg: "the pushgateway port {{ pushgateway_port }} is not down"


- hosts: monitoring_servers
  tags:
    - prometheus
  tasks:
    - name: stop prometheus by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_{{ item }}.sh
      with_items:
        - prometheus
      when: process_supervision == 'supervise'

    - name: stop prometheus by systemd
      systemd: name={{ item }} state=stopped
      when: process_supervision == 'systemd'
      become: true
      with_items:
        - prometheus-{{ prometheus_port }}.service

    - name: wait until the prometheus port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ prometheus_port }}"
        state: stopped
        msg: "the prometheus port {{ prometheus_port }} is not down"


- hosts: kafka_exporter_servers
  tags:
    - kafka_exporter
  tasks:
    - name: stop kafka_exporter by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_kafka_exporter.sh
      when:
        - enable_binlog|default(false)
        - process_supervision == 'supervise'

    - name: stop kafka_exporter by systemd
      become: true
      systemd: name=kafka_exporter-{{ kafka_exporter_port }}.service state=stopped enabled=no
      when:
        - enable_binlog|default(false)
        - process_supervision == 'systemd'

    - name: wait until the kafka_exporter port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ kafka_exporter_port }}"
        state: stopped
        msg: "the kafka_exporter port {{ kafka_exporter_port }} is not down"
      when: enable_binlog|default(false)


- hosts: tidb_servers
  tags:
    - tidb
  tasks:
    - name: stop TiDB by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_{{ item }}.sh
      when: process_supervision == 'supervise'
      with_items:
        - tidb

    - name: stop TiDB by systemd
      systemd: name=tidb-{{ tidb_port }}.service state=stopped
      become: true
      when: process_supervision == 'systemd'

    - name: wait until the TiDB port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ tidb_port }}"
        state: stopped
        msg: "the TiDB port {{ tidb_port }} is not down"


- hosts: pump_servers
  tags:
    - pump
  tasks:
    - name: stop pump by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_{{ item }}.sh
      when:
        - enable_binlog|default(false)
        - process_supervision == 'supervise'
      with_items:
        - pump

    - name: stop pump by systemd
      systemd: name=pump-{{ pump_port }}.service state=stopped
      become: true
      when:
        - enable_binlog|default(false)
        - process_supervision == 'systemd'

    - name: wait until the pump port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ pump_port }}"
        state: stopped
        msg: "the pump port {{ pump_port }} is not down"
      when: enable_binlog|default(false)


- hosts: tikv_servers
  tags:
    - tikv
  tasks:
    - include_tasks: "common_tasks/get_pd_tikv_addr.yml"

    - include_tasks: "common_tasks/get_store_id.yml"
      when: not enable_tls|default(false)

    - include_tasks: "common_tasks/get_store_id_tls.yml"
      when: enable_tls|default(false)

    - include_tasks: "common_tasks/add_evict_leader_scheduler.yml"

    - name: stop TiKV by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_tikv.sh
      when: process_supervision == 'supervise'

    - name: stop TiKV by systemd
      systemd: name=tikv-{{ tikv_port }}.service state=stopped
      become: true
      when: process_supervision == 'systemd'

    - name: wait until the TiKV port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ tikv_port }}"
        state: stopped
        msg: "the TiKV port {{ tikv_port }} is not down"

    - command: cat {{ deploy_dir }}/status/tikv.pid
      register: old_tikv_pid
      ignore_errors: yes
      changed_when: false

    - name: display old tikv pid
      debug:
        msg: "tikv binary or docker pid: {{ old_tikv_pid.stdout }}"

    - include_tasks: "common_tasks/remove_evict_leader_scheduler.yml"


- hosts: pd_servers
  tags:
    - pd
  tasks:
    - set_fact:
        pd_addr: "{{ ansible_host }}:{{ pd_client_port }}"

    - include_tasks: "common_tasks/get_pd_name.yml"

    - name: display PD name
      debug:
        var: pd_name

    - name: display PD address
      debug:
        var: pd_addr

    - include_tasks: "common_tasks/get_pd_leader.yml"
      when: not enable_tls|default(false)

    - include_tasks: "common_tasks/get_pd_leader_tls.yml"
      when: enable_tls|default(false)

    - include_tasks: "common_tasks/transfer_pd_leader.yml"

    - name: stop PD by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_pd.sh
      when: process_supervision == 'supervise'

    - name: stop PD by systemd
      systemd: name=pd-{{ pd_client_port }}.service state=stopped
      become: true
      when: process_supervision == 'systemd'

    - name: wait until the PD port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ pd_client_port }}"
        state: stopped
        msg: "the PD port {{ pd_client_port }} is not down"


- hosts: grafana_servers
  tags:
    - grafana
  tasks:
    - name: stop grafana by supervise
      shell: cd {{ deploy_dir }}/scripts && ./stop_{{ item }}.sh
      when: process_supervision == 'supervise'
      with_items:
        - grafana

    - name: stop grafana by systemd
      systemd: name=grafana-{{ grafana_port }}.service state=stopped
      become: true
      when: process_supervision == 'systemd'

    - name: wait until the grafana port is down
      wait_for:
        host: "{{ ansible_host }}"
        port: "{{ grafana_port }}"
        state: stopped
        msg: "the grafana port {{ grafana_port }} is not down"