Setup a Elasticsearch

Install Elasticsearch https://www.elastic.co/downloads/elasticsearch (2.4.x)
Install attachment plugin cd /usr/share/elasticsearch bin/plugin install mapper-attachments
Configure elasticsearch /etc/sysconfig/elasticsearch ES_HEAP_SIZE=2g

/etc/elasticsearch/elasticsearch.yml http.max_content_length: 500mb

Configure Zammad
- rails r "Setting.set('es_url', 'http://127.0.0.1:9200')"

# optional - es with http basic auth

rails r "Setting.set('es_user', 'elasticsearch')"
rails r "Setting.set('es_password', 'zammad')"

# optional - extra es index name space

rails r "Setting.set('es_index', Socket.gethostname + '_zammad')"

# optional - ignore certain file extentions

rails r "Setting.set('es_attachment_ignore', [ '.png', '.jpg', '.jpeg', '.mpeg', '.mpg', '.mov', '.bin', '.exe', '.box', '.mbox' ] )"

# optional - max attachment size which is used by es, default is 50 mb

rails r "Setting.set('es_attachment_max_size_in_mb', 50)"
Create elastic search indexes
- rake searchindex:rebuild # drop/create/reload