---
# Copyright 2018, Rackspace US, 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,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

- name: Check for service_name var
  fail:
    msg: >-
      The required variable [ service_name ] is undefined.
  when:
    - service_name is undefined

- name: Check for service_owner var
  fail:
    msg: >-
      The required variable [ service_owner ] is undefined.
  when:
    - service_owner is undefined

- name: Check for service_group var
  fail:
    msg: >-
      The required variable [ service_group ] is undefined.
  when:
    - service_group is undefined

- name: Load service variables
  include_vars: "vars_{{ service_name }}.yml"

- name: Gather variables for each operating system
  include_vars: "{{ item }}"
  with_first_found:
    - "{{ ansible_distribution | lower }}-{{ ansible_distribution_version | lower }}.yml"
    - "{{ ansible_distribution | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
    - "{{ ansible_os_family | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
    - "{{ ansible_distribution | lower }}.yml"
    - "{{ ansible_os_family | lower }}-{{ ansible_distribution_version.split('.')[0] }}.yml"
    - "{{ ansible_os_family | lower }}.yml"
  tags:
    - always

- name: Set elastic heap defaults
  set_fact:
    elastic_heap_size_default: "{{ _elastic_heap_size_default }}"
    elastic_log_rotate_path: "/var/log/{{ service_name }}"

- name: Configure systcl vm.max_map_count=262144 on container hosts
  sysctl:
    name: "vm.max_map_count"
    value: "262144"
    state: "present"
    reload: "yes"
  delegate_to: "{{ physical_host }}"
  tags:
    - sysctl

- name: Physical host block
  block:
    - name: Check for directory
      stat:
        path: "/var/lib/{{ service_name }}"
      register: service_dir

    - name: Check for data directory
      debug:
        msg: >-
          The service data directory [ /var/lib/{{ service_name }} ] already
          exists. To ensure no data is lost, the linked directory path to
          [ /openstack/{{ inventory_hostname }}/{{ service_name }} ] will not be
          created for this host.
      when:
        - service_dir.stat.isdir is defined and
          service_dir.stat.isdir

    - name: Ensure service directories data-path exists
      file:
        path: "/openstack/{{ inventory_hostname }}/{{ service_name }}"
        state: "directory"
        owner: "{{ service_owner }}"
        group: "{{ service_group }}"
      when:
        - service_dir.stat.isdir is defined and
          not service_dir.stat.isdir

    - name: Ensure data link exists
      file:
        src: "/openstack/{{ inventory_hostname }}/{{ service_name }}"
        dest: "/var/lib/{{ service_name }}"
        owner: "{{ service_owner }}"
        group: "{{ service_group }}"
        state: link
      when:
        - service_dir.stat.isdir is defined and
          not service_dir.stat.isdir
  when:
    - physical_host == inventory_hostname

- name: elasticsearch datapath bind mount
  lxc_container:
    name: "{{ inventory_hostname }}"
    container_command: |
      [[ ! -d "/var/lib/{{ service_name }}" ]] && mkdir -p "/var/lib/{{ service_name }}"
    container_config:
      - "lxc.mount.entry=/openstack/{{ inventory_hostname }}/{{ service_name }} var/lib/{{ service_name }} none bind 0 0"
  delegate_to: "{{ physical_host }}"
  when:
    - physical_host != inventory_hostname
    - container_tech | default('lxc') == 'lxc'

- name: Ensure Java is installed
  package:
    name: "{{ elastic_distro_packages }}"
    state: "{{ elk_package_state | default('present') }}"
    install_recommends: "{{ (ansible_pkg_mgr == 'apt') | ternary('yes', omit) }}"
    update_cache: "{{ (ansible_pkg_mgr == 'apt') | ternary('yes', omit) }}"
  register: _package_task
  until: _package_task is success
  retries: 3
  delay: 2
  tags:
    - package_install

- name: Create the system group
  group:
    name: "{{ service_group }}"
    gid: "{{ service_group_gid | default(omit) }}"
    state: "present"
    system: "yes"

- name: Create the system user
  block:
    - name: Create the system user
      user:
        name: "{{ service_owner }}"
        uid: "{{ service_owner_uid | default(omit) }}"
        group: "{{ service_group }}"
        shell: "/bin/false"
        system: "yes"
        createhome: "yes"
        home: "/var/lib/{{ service_name }}"
  rescue:
    - name: Ensure the system user exists
      user:
        name: "{{ service_owner }}"
        group: "{{ service_group }}"

- name: Ensure service directories exists
  file:
    path: "/etc/{{ service_name }}"
    state: "directory"
    owner: "{{ service_owner }}"
    group: "{{ service_group }}"

- name: Drop jvm conf file(s)
  template:
    src: "{{ item.src }}"
    dest: "{{ item.dest }}"
  with_items:
    - src: "jvm.options.j2"
      dest: "/etc/{{ service_name }}/jvm.options"
    - src: "templates/logrotate.j2"
      dest: "/etc/logrotate.d/{{ service_name }}"

- name: Ensure host can resolve itself
  lineinfile:
    path: /etc/hosts
    regexp: '^{{ item }}'
    line: '{{ item }} {{ ansible_hostname }} {{ ansible_fqdn }}'
    owner: root
    group: root
    mode: 0644
  with_items:
    - "127.0.2.1"
    - "{{ ansible_host }}"