Support for all xpack features through generic install + improved tests

tasks/xpack/elasticsearch-xpack-install.yml

@@ -0,0 +1,40 @@
+---
+
+- set_fact: es_version_changed=((elasticsearch_install_from_package is defined and elasticsearch_install_from_repo.changed) or (elasticsearch_install_from_package is defined and elasticsearch_install_from_package.changed))
+
+#Test if feature is installed
+- shell: "{{es_home}}/bin/plugin list | sed -n '1!p' | grep {{item}}"
+  register: feature_installed
+  changed_when: False
+  ignore_errors: yes
+  environment:
+    CONF_DIR: "{{ conf_dir }}"
+    ES_INCLUDE: "{{ instance_default_file }}"
+
+
+#Remove Plugin if installed and its not been requested or the ES version has changed
+- name: Remove {{item}} plugin
+  command: >
+    {{es_home}}/bin/plugin remove shield
+  register: xpack_state
+  failed_when: "'ERROR' in xpack_state.stdout"
+  changed_when: xpack_state.rc == 0
+  when: feature_installed.rc == 0 and (not es_enable_xpack or not '"{{item}}" in es_xpack_features' or es_version_changed)
+  notify: restart elasticsearch
+  environment:
+    CONF_DIR: "{{ conf_dir }}"
+    ES_INCLUDE: "{{ instance_default_file }}"
+
+
+#Install plugin if not installed, or the es version has changed (so removed above), and its been requested
+- name: Install {{item}} plugin
+  command: >
+    {{es_home}}/bin/plugin install {{item}}
+  register: xpack_state
+  failed_when: "'ERROR' in xpack_state.stdout"
+  changed_when: xpack_state.rc == 0
+  when: (feature_installed.rc == 1 or es_version_changed) and es_enable_xpack and "{{item}}" in es_xpack_features
+  notify: restart elasticsearch
+  environment:
+    CONF_DIR: "{{ conf_dir }}"
+    ES_INCLUDE: "{{ instance_default_file }}"