Install ES

.travis.yml

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+---
+language: python
+python: "2.7"
+
+# Use the new container infrastructure
+sudo: false
+
+# Install ansible
+addons:
+  apt:
+    packages:
+    - python-pip
+
+install:
+  # Install ansible
+  - pip install ansible
+
+  # Check ansible version
+  - ansible --version
+
+  # Create ansible.cfg with correct roles_path
+  - printf '[defaults]\nroles_path=../' >ansible.cfg
+
+script:
+  # Basic role syntax check
+  - ansible-playbook tests/test.yml -i tests/inventory --syntax-check
+
+notifications:
+  webhooks: https://galaxy.ansible.com/api/v1/notifications/

.yamllint

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+---
+# Based on ansible-lint config
+extends: default
+
+rules:
+  braces:
+    max-spaces-inside: 1
+    level: error
+  brackets:
+    max-spaces-inside: 1
+    level: error
+  colons:
+    max-spaces-after: -1
+    level: error
+  commas:
+    max-spaces-after: -1
+    level: error
+  comments: disable
+  comments-indentation: disable
+  document-start: disable
+  empty-lines:
+    max: 3
+    level: error
+  hyphens:
+    level: error
+  indentation: disable
+  key-duplicates: enable
+  line-length: disable
+  new-line-at-end-of-file: disable
+  new-lines:
+    type: unix
+  trailing-spaces: disable
+  truthy: disable

README.md

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+Elasticsearch
+=========
+
+An Elasticsearch role that can deploy a standalone node or a cluster. All tested with molecule.
+
+Requirements
+------------
+
+No requirements for this role.
+
+Role Variables
+--------------
+
+A description of the settable variables for this role should go here, including any variables that are in defaults/main.yml, vars/main.yml, and any variables that can/should be set via parameters to the role. Any variables that are read from other roles and/or the global scope (ie. hostvars, group vars, etc.) should be mentioned here as well.
+
+Dependencies
+------------
+
+No dependencies for this role.
+
+Example Playbook
+----------------
+
+Including an example of how to use your role (for instance, with variables passed in as parameters) is always nice for users too:
+
+    - hosts: elastic
+      roles:
+         - pictowolf.elasticsearch
+

defaults/main.yml

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+---
+# defaults file for elasticsearch
+es_major_version: 7
+es_minor_version: 15.2-1
+
+es_cluster_name: dev-cluster
+es_data_path: /data/elasticsearch
+es_log_path: /var/log/elasticsearch

handlers/main.yml

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+---
+# handlers file for elasticsearch

meta/main.yml

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+galaxy_info:
+  author: pictowolf
+  namespace: pictowolf
+  description: Installs elasticsearch either as a standalone node or clustered.
+  company: Infinity Servers
+
+  # If the issue tracker for your role is not on github, uncomment the
+  # next line and provide a value
+  # issue_tracker_url: http://example.com/issue/tracker
+
+  # Choose a valid license ID from https://spdx.org - some suggested licenses:
+  # - BSD-3-Clause (default)
+  # - MIT
+  # - GPL-2.0-or-later
+  # - GPL-3.0-only
+  # - Apache-2.0
+  # - CC-BY-4.0
+  license: MIT
+  min_ansible_version: "2.1"
+
+  # If this a Container Enabled role, provide the minimum Ansible Container version.
+  # min_ansible_container_version:
+
+  #
+  # Provide a list of supported platforms, and for each platform a list of versions.
+  # If you don't wish to enumerate all versions for a particular platform, use 'all'.
+  # To view available platforms and versions (or releases), visit:
+  # https://galaxy.ansible.com/api/v1/platforms/
+  #
+  platforms:
+  - name: EL
+    versions:
+    - all
+  #   - 25
+  # - name: SomePlatform
+  #   versions:
+  #   - all
+  #   - 1.0
+  #   - 7
+  #   - 99.99
+
+  galaxy_tags: []
+    # List tags for your role here, one per line. A tag is a keyword that describes
+    # and categorizes the role. Users find roles by searching for tags. Be sure to
+    # remove the '[]' above, if you add tags to this list.
+    #
+    # NOTE: A tag is limited to a single word comprised of alphanumeric characters.
+    #       Maximum 20 tags per role.
+
+dependencies: []
+  # List your role dependencies here, one per line. Be sure to remove the '[]' above,
+  # if you add dependencies to this list.

molecule/default/converge.yml

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+---
+- name: Converge
+  hosts: all
+  tasks:
+    - name: "Include pictowolf.elasticsearch"
+      include_role:
+        name: "pictowolf.elasticsearch"

molecule/default/molecule.yml

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+---
+dependency:
+  name: galaxy
+driver:
+  name: docker
+lint: |
+  set -e
+  yamllint .
+  ansible-lint .
+platforms:
+  - name: instance1
+    image: "geerlingguy/docker-centos7-ansible:latest"
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup:ro
+    privileged: true
+    pre_build_image: true
+    groups:
+      - master
+provisioner:
+  name: ansible
+verifier:
+  name: ansible

molecule/default/verify.yml

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+---
+# This is an example playbook to execute Ansible tests.
+
+- name: Verify
+  hosts: all
+  gather_facts: false
+  tasks:
+  - name: Example assertion
+    ansible.builtin.assert:
+      that: true

tasks/configure.yml

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+---
+- name: Set elasticsearch.yml
+  ansible.builtin.template:
+    src: elasticsearch.yml.j2
+    dest: /etc/elasticsearch/elasticsearch.yml

tasks/install.yml

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+---
+- name: Add Elastic GPG key for downloads
+  ansible.builtin.rpm_key:
+    state: present
+    key: https://artifacts.elastic.co/GPG-KEY-elasticsearch
+
+- name: Add Elastic repo to instance
+  ansible.builtin.yum_repository:
+    name: elasticsearch
+    description: "Elasticsearch repository for {{ es_major_version }} packages"
+    baseurl: "https://artifacts.elastic.co/packages/{{ es_major_version }}.x/yum"
+    gpgcheck: yes
+    gpgkey: https://artifacts.elastic.co/GPG-KEY-elasticsearch
+    enabled: yes
+
+- name: Install Elastic
+  ansible.builtin.package:
+    name: "elasticsearch-{{ es_major_version }}.{{ es_minor_version }}.x86_64"
+    state: present

tasks/main.yml

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+---
+- name: Include install tasks
+  ansible.builtin.include_tasks: install.yml
+
+- name: Include configuration tasks
+  ansible.builtin.include_tasks: configure.yml

templates/elasticsearch.yml.j2

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+# ======================== Elasticsearch Configuration =========================
+#
+# NOTE: Elasticsearch comes with reasonable defaults for most settings.
+#       Before you set out to tweak and tune the configuration, make sure you
+#       understand what are you trying to accomplish and the consequences.
+#
+# The primary way of configuring a node is via this file. This template lists
+# the most important settings you may want to configure for a production cluster.
+#
+# Please consult the documentation for further information on configuration options:
+# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
+#
+# ---------------------------------- Cluster -----------------------------------
+#
+# Use a descriptive name for your cluster:
+#
+cluster.name: {{ es_cluster_name }}
+#
+# ------------------------------------ Node ------------------------------------
+#
+# Use a descriptive name for the node:
+#
+node.name: {{ inventory_hostname }}
+#
+# Add custom attributes to the node:
+#
+#node.attr.rack: r1
+#
+# ----------------------------------- Paths ------------------------------------
+#
+# Path to directory where to store the data (separate multiple locations by comma):
+#
+path.data: {{ es_data_path }}
+#
+# Path to log files:
+#
+path.logs: {{ es_log_path }}
+#
+# ----------------------------------- Memory -----------------------------------
+#
+# Lock the memory on startup:
+#
+#bootstrap.memory_lock: true
+#
+# Make sure that the heap size is set to about half the memory available
+# on the system and that the owner of the process is allowed to use this
+# limit.
+#
+# Elasticsearch performs poorly when the system is swapping the memory.
+#
+# ---------------------------------- Network -----------------------------------
+#
+# By default Elasticsearch is only accessible on localhost. Set a different
+# address here to expose this node on the network:
+#
+network.host: {{ inventory_hostname }}
+#
+# By default Elasticsearch listens for HTTP traffic on the first free port it
+# finds starting at 9200. Set a specific HTTP port here:
+#
+http.port: 9200
+#
+# For more information, consult the network module documentation.
+#
+# --------------------------------- Discovery ----------------------------------
+#
+# Pass an initial list of hosts to perform discovery when this node is started:
+{% if groups['master'] | length == 1 %}
+discovery.type: single-node
+#discovery.seed_hosts:
+{% elif groups['master'] | length > 1 -%}
+discovery.type: multi-node
+discovery.seed_hosts:
+{% for host in groups['master'] %}
+  - {{ hostvars[host]['ansible_default_ipv4']['address'] }} # {{ host }}  
+{% endfor %}
+{% endif %}
+#
+# Bootstrap the cluster using an initial set of master-eligible nodes:
+{% if groups['master'] | length == 1 %}
+#cluster.initial_master_nodes: ["node-1", "node-2"]
+{% elif groups['master'] | length > 1 -%}
+cluster.initial_master_nodes:
+{% for host in groups['master'] %}
+  - {{ hostvars[host]['ansible_default_ipv4']['address'] }} # {{ host }}  
+{% endfor %}
+{% endif %}
+#
+# For more information, consult the discovery and cluster formation module documentation.
+#
+# ---------------------------------- Various -----------------------------------
+#
+# Require explicit names when deleting indices:
+#
+#action.destructive_requires_name: true
+#
+# ---------------------------------- Security -----------------------------------
+{#
+xpack.security.enabled: {{ es_xpack_enabled }}
+xpack.security.http.ssl.enabled: {{ es_tls_enabled }}
+xpack.security.transport.ssl.enabled: {{ es_tls_enabled }}
+{% if es_tls_enabled == true %}
+xpack.security.http.ssl.key: {{ es_tls_key }}
+xpack.security.http.ssl.certificate: {{ es_tls_cert }}
+xpack.security.http.ssl.certificate_authorities: {{ es_tls_ca }}
+xpack.security.transport.ssl.key: {{ es_tls_key }}
+xpack.security.transport.ssl.certificate:  {{ es_tls_cert }}
+xpack.security.transport.ssl.certificate_authorities: {{ es_tls_ca }}
+{% endif %}
+#}

tests/inventory

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+localhost
+

tests/test.yml

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+---
+- hosts: localhost
+  remote_user: root
+  roles:
+    - elasticsearch

vars/main.yml

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+---
+# vars file for elasticsearch