Set the address when in solrcloud mode.

defaults/main.yml

@@ -31,6 +31,7 @@ solr_heap:  1024M
 # core, solrcloud.
 # Use 'core' when running standalone.
 solr_mode: core
+solr_host_address: '{{ ansible_default_ipv4.address }}'
 solr_download_dir: '{{ solr_base_dir }}/download'
 solr_zookeeper_data_dir: '{{ solr_data_dir }}/zoo_data'
 solr_install_collection1: False

templates/solr-default.j2

@@ -61,9 +61,11 @@ ZK_HOST="{{ solr_zk_hosts }}"
 # Set the ZooKeeper client timeout (for SolrCloud mode)
 ZK_CLIENT_TIMEOUT="{{ solr_zk_timeout }}"
 
+{% if solr_mode == solrcloud %}
 # By default the start script uses "localhost"; override the hostname here
 # for production SolrCloud environments to control the hostname exposed to cluster state
-#SOLR_HOST="192.168.1.1"
+SOLR_HOST="{{ solr_host_address }}"
+{% endif %}
 
 # By default the start script uses UTC; override the timezone if needed
 #SOLR_TIMEZONE="UTC"