ansible-role-elasticsearch/tasks/elasticsearch-plugins.yml

---

# es_plugins_reinstall will be set to true if elasticsearch_install_from_repo.changed or elasticsearch_install_from_package.changed
# i.e. we have changed ES version(or we have clean installation of ES), or if no plugins listed. Otherwise it is false and requires explicitly setting.
- name: set fact es_plugins_reinstall to true
  set_fact: es_plugins_reinstall=true
  when: (((debian_elasticsearch_install_from_repo is defined and debian_elasticsearch_install_from_repo.changed) or (redhat_elasticsearch_install_from_repo is defined and redhat_elasticsearch_install_from_repo.changed)) or (elasticsearch_install_from_package is defined and elasticsearch_install_from_package.changed)) or es_plugins is not defined or es_plugins is none

- name: set fact list_command
  set_fact: list_command=""
#If we are reinstalling all plugins, e.g. to a version change, we need to remove all plugins (inc. x-pack) to install any plugins. Otherwise we don't consider x-pack so the role stays idempotent.
- name: set fact list_command check for x-pack
  set_fact: list_command="| grep -vE 'x-pack'"
  when: not es_plugins_reinstall

- name: remove x-pack plugin directory when it isn't a plugin
  file:
    dest: "{{ es_home }}/plugins/x-pack"
    state: "absent"

#List currently installed plugins. We have to list the directories as the list commmand fails if the ES version is different than the plugin version.
- name: Check installed elasticsearch plugins
  become: yes
  shell: "ls {{es_home}}/plugins {{list_command}}"
  register: installed_plugins
  changed_when: False
  ignore_errors: yes
  environment:
    CONF_DIR: "{{ es_conf_dir }}"
    ES_PATH_CONF: "{{ es_conf_dir }}"
    ES_INCLUDE: "{{ default_file }}"
  check_mode: no

#if es_plugins_reinstall is set to true we remove ALL plugins
- name: set fact plugins_to_remove to install_plugins.stdout_lines
  set_fact: plugins_to_remove="{{ installed_plugins.stdout_lines | default([]) }}"
  when: es_plugins_reinstall

#if the plugins listed are different than those requested, we remove those installed but not listed in the config
- name: set fact plugins_to_remove to delete plugins installed but not listed in es_plugins
  set_fact: plugins_to_remove="{{ installed_plugins.stdout_lines | difference(es_plugins | json_query('[*].plugin')) | default([]) }}"
  when: not es_plugins_reinstall

#if es_plugins_reinstall is set to true we (re)install ALL plugins
- name: set fact plugins_to_install to es_plugins
  set_fact: plugins_to_install="{{ es_plugins | json_query('[*].plugin') | default([]) }}"
  when: es_plugins_reinstall

#if the plugins listed are different than those requested, we install those not installed but listed in the config
- name: set fact to plugins_to_install to those in es_config but not installed
  set_fact: plugins_to_install="{{ es_plugins | json_query('[*].plugin') | difference(installed_plugins.stdout_lines) | default([]) }}"
  when: not es_plugins_reinstall

# This removes any currently installed plugins (to prevent errors when reinstalling)
- name: Remove elasticsearch plugins
  become: yes
  command: "{{es_home}}/bin/elasticsearch-plugin remove {{item}} --silent"
  with_items: "{{ plugins_to_remove | default([]) }}"
  notify: restart elasticsearch
  register: plugin_removed
  environment:
    CONF_DIR: "{{ es_conf_dir }}"
    ES_PATH_CONF: "{{ es_conf_dir }}"
    ES_INCLUDE: "{{ default_file }}"

- name: Install elasticsearch plugins
  become: yes
  command: "{{es_home}}/bin/elasticsearch-plugin install {{ item.url | default(item.plugin) }} --batch --silent"
  register: plugin_installed
  changed_when: plugin_installed.rc|default(0) == 0
  with_items: "{{ es_plugins }}"
  when: item.plugin in plugins_to_install
  notify: restart elasticsearch
  environment:
    CONF_DIR: "{{ es_conf_dir }}"
    ES_PATH_CONF: "{{ es_conf_dir }}"
    ES_INCLUDE: "{{ default_file }}"
  until: plugin_installed.rc|default(0) == 0
  retries: 5
  delay: 5