---
# Installs OpenSearch from the upstream tarball (bundled JDK) and runs it
# under systemd in single-node mode for logs.vntx.net.

- name: Set vm.max_map_count for OpenSearch
  ansible.posix.sysctl:
    name: vm.max_map_count
    value: "{{ opensearch_vm_max_map_count }}"
    state: present
    reload: true

- name: Create opensearch group
  ansible.builtin.group:
    name: "{{ opensearch_group }}"
    system: true
    state: present

- name: Create opensearch user
  ansible.builtin.user:
    name: "{{ opensearch_user }}"
    group: "{{ opensearch_group }}"
    system: true
    shell: /usr/sbin/nologin
    home: "{{ opensearch_data_dir }}"
    create_home: false
    state: present

- name: Create opensearch directories
  ansible.builtin.file:
    path: "{{ item }}"
    state: directory
    owner: "{{ opensearch_user }}"
    group: "{{ opensearch_group }}"
    mode: "0750"
  loop:
    - "{{ opensearch_install_dir }}"
    - "{{ opensearch_config_dir }}"
    - "{{ opensearch_data_dir }}"
    - "{{ opensearch_log_dir }}"

- name: Check installed opensearch version
  ansible.builtin.command: "{{ opensearch_install_dir }}/bin/opensearch --version"
  register: opensearch_installed
  changed_when: false
  failed_when: false

- name: Decide whether opensearch needs (re)install
  ansible.builtin.set_fact:
    opensearch_needs_install: >-
      {{
        opensearch_installed.rc != 0
        or opensearch_version not in (opensearch_installed.stdout | default(''))
        and opensearch_version not in (opensearch_installed.stderr | default(''))
      }}

- name: Download opensearch tarball
  ansible.builtin.get_url:
    url: "https://artifacts.opensearch.org/releases/bundle/opensearch/{{ opensearch_version }}/opensearch-{{ opensearch_version }}-linux-{{ opensearch_arch }}.tar.gz"
    dest: "/tmp/opensearch-{{ opensearch_version }}-linux-{{ opensearch_arch }}.tar.gz"
    mode: "0644"
  when: opensearch_needs_install

- name: Extract opensearch tarball to install dir
  ansible.builtin.unarchive:
    src: "/tmp/opensearch-{{ opensearch_version }}-linux-{{ opensearch_arch }}.tar.gz"
    dest: "{{ opensearch_install_dir }}"
    remote_src: true
    extra_opts:
      - --strip-components=1
    owner: "{{ opensearch_user }}"
    group: "{{ opensearch_group }}"
  when: opensearch_needs_install
  notify: Restart opensearch

- name: Render opensearch.yml
  ansible.builtin.template:
    src: opensearch.yml.j2
    dest: "{{ opensearch_config_dir }}/opensearch.yml"
    owner: "{{ opensearch_user }}"
    group: "{{ opensearch_group }}"
    mode: "0640"
  notify: Restart opensearch

- name: Render jvm.options
  ansible.builtin.template:
    src: jvm.options.j2
    dest: "{{ opensearch_config_dir }}/jvm.options"
    owner: "{{ opensearch_user }}"
    group: "{{ opensearch_group }}"
    mode: "0640"
  notify: Restart opensearch

- name: Install opensearch systemd unit
  ansible.builtin.template:
    src: opensearch.service.j2
    dest: /etc/systemd/system/opensearch.service
    owner: root
    group: root
    mode: "0644"
  notify: Restart opensearch

- name: Enable and start opensearch
  ansible.builtin.systemd:
    name: opensearch
    enabled: true
    state: started
    daemon_reload: true

# --- OpenSearch Dashboards ---

- name: Create opensearch-dashboards directories
  ansible.builtin.file:
    path: "{{ item }}"
    state: directory
    owner: "{{ opensearch_user }}"
    group: "{{ opensearch_group }}"
    mode: "0750"
  loop:
    - "{{ opensearch_dashboards_install_dir }}"
    - "{{ opensearch_dashboards_config_dir }}"

- name: Check installed opensearch-dashboards version
  ansible.builtin.command: "{{ opensearch_dashboards_install_dir }}/bin/opensearch-dashboards --version"
  register: dashboards_installed
  changed_when: false
  failed_when: false

- name: Decide whether dashboards needs (re)install
  ansible.builtin.set_fact:
    dashboards_needs_install: >-
      {{
        dashboards_installed.rc != 0
        or opensearch_dashboards_version not in (dashboards_installed.stdout | default(''))
        and opensearch_dashboards_version not in (dashboards_installed.stderr | default(''))
      }}

- name: Download opensearch-dashboards tarball
  ansible.builtin.get_url:
    url: "https://artifacts.opensearch.org/releases/bundle/opensearch-dashboards/{{ opensearch_dashboards_version }}/opensearch-dashboards-{{ opensearch_dashboards_version }}-linux-{{ opensearch_arch }}.tar.gz"
    dest: "/tmp/opensearch-dashboards-{{ opensearch_dashboards_version }}-linux-{{ opensearch_arch }}.tar.gz"
    mode: "0644"
  when: dashboards_needs_install

- name: Extract opensearch-dashboards tarball to install dir
  ansible.builtin.unarchive:
    src: "/tmp/opensearch-dashboards-{{ opensearch_dashboards_version }}-linux-{{ opensearch_arch }}.tar.gz"
    dest: "{{ opensearch_dashboards_install_dir }}"
    remote_src: true
    extra_opts:
      - --strip-components=1
    owner: "{{ opensearch_user }}"
    group: "{{ opensearch_group }}"
  when: dashboards_needs_install
  notify: Restart opensearch-dashboards

- name: Render opensearch-dashboards.yml
  ansible.builtin.template:
    src: opensearch-dashboards.yml.j2
    dest: "{{ opensearch_dashboards_config_dir }}/opensearch_dashboards.yml"
    owner: "{{ opensearch_user }}"
    group: "{{ opensearch_group }}"
    mode: "0640"
  notify: Restart opensearch-dashboards

- name: Install opensearch-dashboards systemd unit
  ansible.builtin.template:
    src: opensearch-dashboards.service.j2
    dest: /etc/systemd/system/opensearch-dashboards.service
    owner: root
    group: root
    mode: "0644"
  notify: Restart opensearch-dashboards

- name: Enable and start opensearch-dashboards
  ansible.builtin.systemd:
    name: opensearch-dashboards
    enabled: true
    state: started
    daemon_reload: true