环境：
OS: Centos 7.6
JDK: 1.8.0_91
下载地址：
https://artifacts.elastic.co/downloads/beats/heartbeat/heartbeat-7.4.2-linux-x86_64.tar.gz
https://artifacts.elastic.co/downloads/beats/packetbeat/packetbeat-7.4.2-linux-x86_64.tar.gz
https://artifacts.elastic.co/downloads/beats/metricbeat/metricbeat-7.4.2-linux-x86_64.tar.gz
https://artifacts.elastic.co/downloads/beats/filebeat/filebeat-7.4.2-linux-x86_64.tar.gz
https://artifacts.elastic.co/downloads/logstash/logstash-7.4.2.tar.gz
https://artifacts.elastic.co/downloads/kibana/kibana-7.4.2-linux-x86_64.tar.gz
https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.4.2-linux-x86_64.tar.gz
安装ElasticSearch