Elasticsearch7.7.0搭建并集成IK分词器

1、下载，解压安装

https://www.elastic.co/cn/downloads/past-releases/elasticsearch-7-7-0

rpm --install elasticsearch-7.7.0-x86_64.rpm

2、添加systemd

systemctl daemon-reload
systemctl enable elasticsearch.service

3、修改配置/etc/elasticsearch/elasticsearch.yml

cluster.name: sjzy-es
node.name: node18
path.data: /bigdata/es/data1,/bigdata/es/data2,/bigdata/es/data3,/bigdata/es/data4,/bigdata/es/data5,/bigdata/es/data
path.logs: /var/log/elasticsearch
bootstrap.memory_lock: true
network.host: 0.0.0.0
http.port: 9200
transport.tcp.port: 9300
discovery.seed_hosts: ["node18","node19","node20","node21","node22","node23","node24","node2
5","node26","node27","node28","node29"]
cluster.initial_master_nodes: ["node18", "node19", "node20"]

4、修改配置/etc/elasticsearch/jvm.options

根据实际情况设置内存

-Xms64g
-Xmx64g

5、修改配置/usr/lib/systemd/system/elasticsearch.service

否则报错内存锁定

[Service]下添加
LimitMEMLOCK=infinity

6、给数据目录赋权限

chmod -R 777 /bigdata/es

7、增加跨域访问，方便header查看

http.cors.enabled: true
http.cors.allow-origin: "*"

8、启动ES

systemctl start elasticsearch.service

9、集成IK分词器

（1）下载对应版本IK

https://github.com/medcl/elasticsearch-analysis-ik

（2）到指定目下解压为ik目录

cd /usr/share/elasticsearch/plugins
unzip -d ik elasticsearch-analysis-ik-7.7.0.zip

（3）重启es