Role that configures solr cores into a already deployed solr 4.x instance.

solr-tomcat-core-conf/defaults/main.yml

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+---
+solr_http_port: 8983
+tomcat_load_additional_default_conf: True
+tomcat_version: 7
+# solr needs a lot of time to start if it needs to rebuild its indices
+tomcat_restart_timeout: 100000
+
+solr_service: -solr
+solr_config_name: hindex
+solr_shards: 1
+solr_instance: '{{ solr_service }}'
+solr_log_level: INFO
+solr_http_port_1: '{{ solr_http_port }}'
+solr_zoo_port: 9983
+solr_zoo_port_1: 9984
+solr_zoo_port_2: 9985
+solr_jmx_port_1: 8601
+solr_user: '{{ tomcat_user }}'
+solr_group: '{{ tomcat_user }}'
+solr_outside_tomcat_dir: False
+# We need to define this one because we are using the tomcat multiple instances role
+solr_tomcat_instance_dir: '{{ tomcat_m_instances_base_path }}/{{ solr_http_port }}'
+solr_data_dir: '{{ solr_tomcat_instance_dir }}/solr'
+solr_collections_base_dir: '{{ solr_data_dir }}/data/solr'
+solr_zookeeper_data_dir: '{{ solr_data_dir }}/zoo_data'
+solr_install_collection1: False
+
+# Define the following if you want a multicore installation
+solr_multicore: False
+solr_global_cores:
+  - collection1
+

solr-tomcat-core-conf/handlers/main.yml

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+---
+- name: tomcat solr restart
+  service: name=tomcat-instance-{{ solr_http_port }} state=restarted sleep=20
+

solr-tomcat-core-conf/tasks/main.yml

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+---
+- block:
+  - name: Create the solr cores data directories
+    file: dest={{ solr_collections_base_dir }}/{{ item }} state=directory owner={{ solr_user }} group={{ solr_user }}
+    with_items: '{{ solr_cores }}'
+    
+  - name: Install the solr cores data on a multicore system
+    unarchive: src={{ solr_data_dir }}/collection_data/solr_core_base.tar.gz dest={{ solr_data_dir }}/data/solr/{{ item }} copy=no
+    args:
+      creates: '{{ solr_data_dir }}/data/solr/{{ item }}/conf/solrconfig.xml'
+    with_items: '{{ solr_global_cores }}'
+    notify: tomcat solr restart
+
+  - name: Install the solr.xml file
+    template: src={{ item }}.j2 dest={{ solr_data_dir }}/data/solr/{{ item }} owner=root group={{ solr_user }} mode=0440
+    with_items:
+      - solr.xml
+    notify: tomcat solr restart
+
+  - name: Fix the cores permissions
+    file: path={{ solr_collections_base_dir }} owner={{ solr_user }} group={{ solr_user }} recurse=yes
+
+  when: solr_multicore is defined and solr_multicore
+  tags: [ solr, tomcat, solr_core ]
+

solr-tomcat-core-conf/templates/solr.xml.j2

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+<?xml version="1.0" encoding="UTF-8" ?>
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<!--
+   This is an example of a simple "solr.xml" file for configuring one or 
+   more Solr Cores, as well as allowing Cores to be added, removed, and 
+   reloaded via HTTP requests.
+
+   More information about options available in this configuration file, 
+   and Solr Core administration can be found online:
+   http://wiki.apache.org/solr/CoreAdmin
+-->
+
+<solr>
+
+  <solrcloud>
+    {% if not solr_multicore %}
+    <str name="host">{{ ansible_fqdn }}</str>
+    <int name="hostPort">{{ solr_http_port_1 }}</int>
+    <str name="hostContext">${hostContext:solr}</str>
+    <int name="zkClientTimeout">${zkClientTimeout:30000}</int>
+    <bool name="genericCoreNodeNames">${genericCoreNodeNames:true}</bool>
+    {% endif %}
+  </solrcloud>
+
+  <shardHandlerFactory name="shardHandlerFactory" class="HttpShardHandlerFactory">
+    <int name="socketTimeout">${socketTimeout:0}</int>
+    <int name="connTimeout">${connTimeout:0}</int>
+  </shardHandlerFactory>
+
+  {% if solr_multicore %}
+  <cores adminPath="/admin/cores">
+    {% for core in solr_global_cores %}
+    
+    <core name="{{ core }}" instanceDir="{{ core }}">
+      <property name="dataDir" value="{{ solr_collections_base_dir }}/{{ core }}" />
+    </core>
+    
+    {% endfor %}
+  </cores>
+  {% endif %}
+
+
+</solr>