library/roles/ELK/elasticsearch: Compatibility fixes for version 5.x. Version 5.x is now the default.

ELK/elasticsearch/defaults/main.yml

@@ -1,9 +1,11 @@
 ---
 elasticsearch_repo_key: https://packages.elastic.co/GPG-KEY-elasticsearch
-elasticsearch_repo: 'deb http://packages.elastic.co/elasticsearch/2.x/debian stable main'
+elasticsearch_repo_version: 5.x
+elasticsearch_repo: 'deb http://packages.elastic.co/elasticsearch/{{ elasticsearch_repo_version }}/debian stable main'
 elasticsearch_packages:
   - elasticsearch
 
+elasticsearch_package_state: 'present'
 elasticsearch_cluster_name: 'Elasticsearch Cluster'
 elasticsearch_enabled: True
 elasticsearch_http_port: 9200
@@ -11,15 +13,23 @@ elasticsearch_data_dir: /var/lib/elasticsearch
 elasticsearch_log_dir: /var/log/elasticsearch
 elasticsearch_bind_ip: 127.0.0.1
 elasticsearch_discovery_host_list: '["127.0.0.1", "[::1]"]'
-elasticsearch_define_majority_of_nodes: False
-elasticsearch_majority_of_nodes: 3
+elasticsearch_define_majority_of_nodes: True
+elasticsearch_majority_of_nodes: 1
+elasticsearch_real_cluster: False
 elasticsearch_recover_after_nodes: 3
 elasticsearch_max_local_storage_nodes: 1
-elasticsearch_destructive_requires_name: True
+elasticsearch_destructive_requires_name: 'true'
 elasticsearch_define_heap_size: False
 elasticsearch_heap_size: 2g
 elasticsearch_additional_java_opts: ''
-elasticsearch_max_open_files: 65535
+elasticsearch_max_open_files: 65536
 
-elasticsearch_plugins:
+# bin/plugin for 2.x, bin/elasticsearch-plugin for 5.x
+elasticsearch_plugin_bin: /usr/share/elasticsearch/bin/elasticsearch-plugin
+#elasticsearch_plugins:
+#  - { name: 'royrusso/elasticsearch-HQ', state: 'present' }
+
+# elasticsearch 5 not supported yet
+elasticsearch_hq_install: False
+elasticsearch_hq_plugin:
   - { name: 'royrusso/elasticsearch-HQ', state: 'present' }

ELK/elasticsearch/tasks/elasticsearch.yml

@@ -1,24 +1,25 @@
 ---
+- block:
     - name: Install the elasticsearch repo key
       apt_key: url={{ elasticsearch_repo_key }} state=present
-  tags: [ 'ELK', 'elasticsearch', 'elk' ]
 
     - name: Install the elasticsearch deb repository
       apt_repository: repo='{{ elasticsearch_repo }}' state=present update_cache=yes
-  tags: [ 'ELK', 'elasticsearch', 'elk' ]
 
     - name: Install the elasticsearch deb packages
-  apt: name='{{ item }}' state=present
+      apt: name='{{ item }}' state={{ elasticsearch_package_state }} update_cache=yes cache_valid_time=1800
       with_items: '{{ elasticsearch_packages }}'
-  tags: [ 'ELK', 'elasticsearch', 'elk' ]
   
     - name: Install the elasticsearch startup default
       template: src=elasticsearch-default.j2 dest=/etc/default/elasticsearch owner=root group=elasticsearch mode=0640
       notify: Restart elasticsearch
-  tags: [ 'ELK', 'elasticsearch', 'elk' ]
+
+    - name: Install the elasticsearch JVM options
+      template: src=jvm.options.j2 dest=/etc/elasticsearch/jvm.options owner=root group=elasticsearch mode=0640
+      notify: Restart elasticsearch
 
     - name: Install the elasticsearch configuration
       template: src=elasticsearch.yml.j2 dest=/etc/elasticsearch/elasticsearch.yml owner=root group=elasticsearch mode=0640
       notify: Restart elasticsearch
-  tags: [ 'ELK', 'elasticsearch', 'elk' ]
 
+  tags: [ 'ELK', 'elasticsearch', 'elk' ]

ELK/elasticsearch/tasks/plugins.yml

@@ -1,9 +1,14 @@
 ---
 - block:
     - name: Manage a list of elasticsearch plugins
-      elasticsearch_plugin: name="{{ item.name }}" state={{ item.state }} url={{ item.url|default(omit) }} version={{ item.version|default(omit) }}
+      elasticsearch_plugin: name="{{ item.name }}" state={{ item.state }} plugin_bin={{ elasticsearch_plugin_bin }} url={{ item.url|default(omit) }} version={{ item.version|default(omit) }}
       with_items: '{{ elasticsearch_plugins | default ([]) }}'
 
+    - name: Install the elasticsearch HQ plugin
+      elasticsearch_plugin: name="{{ item.name }}" state={{ item.state }} plugin_bin={{ elasticsearch_plugin_bin }} url={{ item.url|default(omit) }} version={{ item.version|default(omit) }}
+      with_items: '{{ elasticsearch_hq_plugin | default ([]) }}'
+      when: elasticsearch_hq_install
+
   when: elasticsearch_plugins is defined
   tags: [ 'elasticsearch', 'es_plugins' ]
     

ELK/elasticsearch/templates/elasticsearch.yml.j2

@@ -77,16 +77,18 @@ discovery.zen.minimum_master_nodes: {{ elasticsearch_majority_of_nodes }}
 # For more information, see the documentation at:
 # <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery.html>
 #
+{% if elasticsearch_real_cluster %}
 # ---------------------------------- Gateway -----------------------------------
 #
 # Block initial recovery after a full cluster restart until N nodes are started:
 #
-gateway.recover_after_nodes: 
+gateway.recover_after_nodes: {{ elasticsearch_recover_after_nodes }}
 #
 # For more information, see the documentation at:
 # <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-gateway.html>
 #
 {% endif %}
+{% endif %}
 # ---------------------------------- Various -----------------------------------
 #
 # Disable starting multiple nodes on a single system:

ELK/elasticsearch/templates/jvm.options.j2

@@ -0,0 +1,95 @@
+## JVM configuration
+
+################################################################
+## IMPORTANT: JVM heap size
+################################################################
+##
+## You should always set the min and max JVM heap
+## size to the same value. For example, to set
+## the heap to 4 GB, set:
+##
+## -Xms4g
+## -Xmx4g
+##
+## See https://www.elastic.co/guide/en/elasticsearch/reference/current/heap-size.html
+## for more information
+##
+################################################################
+
+# Xms represents the initial size of total heap space
+# Xmx represents the maximum size of total heap space
+
+-Xms{{ elasticsearch_heap_size }}
+-Xmx{{ elasticsearch_heap_size }}
+
+################################################################
+## Expert settings
+################################################################
+##
+## All settings below this section are considered
+## expert settings. Don't tamper with them unless
+## you understand what you are doing
+##
+################################################################
+
+## GC configuration
+-XX:+UseConcMarkSweepGC
+-XX:CMSInitiatingOccupancyFraction=75
+-XX:+UseCMSInitiatingOccupancyOnly
+
+## optimizations
+
+# disable calls to System#gc
+-XX:+DisableExplicitGC
+
+# pre-touch memory pages used by the JVM during initialization
+-XX:+AlwaysPreTouch
+
+## basic
+
+# force the server VM
+-server
+
+# set to headless, just in case
+-Djava.awt.headless=true
+
+# ensure UTF-8 encoding by default (e.g. filenames)
+-Dfile.encoding=UTF-8
+
+# use our provided JNA always versus the system one
+-Djna.nosys=true
+
+# flag to explicitly tell Netty to not use unsafe
+-Dio.netty.noUnsafe=true
+
+## heap dumps
+
+# generate a heap dump when an allocation from the Java heap fails
+# heap dumps are created in the working directory of the JVM
+-XX:+HeapDumpOnOutOfMemoryError
+
+# specify an alternative path for heap dumps
+# ensure the directory exists and has sufficient space
+#-XX:HeapDumpPath=${heap.dump.path}
+
+## GC logging
+
+#-XX:+PrintGCDetails
+#-XX:+PrintGCTimeStamps
+
+#-XX:+PrintGCDateStamps
+#-XX:+PrintClassHistogram
+#-XX:+PrintTenuringDistribution
+#-XX:+PrintGCApplicationStoppedTime
+
+# log GC status to a file with time stamps
+# ensure the directory exists
+#-Xloggc:${loggc}
+
+# Elasticsearch 5.0.0 will throw an exception on unquoted field names in JSON.
+# If documents were already indexed with unquoted fields in a previous version
+# of Elasticsearch, some operations may throw errors.
+#
+# WARNING: This option will be removed in Elasticsearch 6.0.0 and is provided
+# only for migration purposes.
+#-Delasticsearch.json.allow_unquoted_field_names=true