1、solr.xml 配置说明
https://cwiki.apache.org/confluence/display/solr/Moving+to+the+New+solr.xml+Format
2、solr.xml 及core.properties 配置说明
https://cwiki.apache.org/confluence/display/solr/Format+of+solr.xml
3、SolrClound 官方说明（原Wiki的最新说明）
https://cwiki.apache.org/confluence/display/solr/SolrCloud
4、zookeeper CLI 样例地址
https://cwiki.apache.org/confluence/display/solr/Command+Line+Utilities#CommandLineUtilities-ZooKeeperCLIExamples