【知識積累】ElasticSearch安裝

提示：先將JDK版本升級到1.8以上
https://blog.csdn.net/axin1240101543/article/details/103583217

1、上傳ES到linux

2、配置ES用戶

useradd es
passwd es

3、將ES複製到/opt目錄、解壓、賦權

cp elasticsearch-7.4.2-linux-x86_64.tar /opt/
tar xf elasticsearch-7.4.2-linux-x86_64.tar
chown -R es:es elasticsearch-7.4.2

4、配置ES

vi elasticsearch-7.4.2/config/elasticsearch.yml

bootstrap.memory_lock: false
bootstrap.system_call_filter: false
network.host: 192.168.244.11 #本機IP
http.port: 9200 #訪問端口
discovery.seed_hosts: ["node01"] #主機名
cluster.initial_master_nodes: ["node01-1"]  #主節點

5、配置ES的文件描述符

vi /etc/security/limits.conf

es soft nofile 819200 #es是剛剛添加的用戶
es hard nofile 819200

TIPS：不配置可能會報錯：
max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]

6、配置用戶的最大線程數

vi /etc/security/limits.d/90-nproc.conf

es          soft    nproc     4096 #es是剛剛添加的用戶

TIPS：不配置可能會報錯：
max number of threads [1024] for user [es] likely too low, increase to at least [4096]

7、配置虛擬內存

vi /etc/sysctl.conf

vm.max_map_count=655360

加載配置

sysctl -p

TIPS：不配置可能會報錯
max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [655360]

8、切換用戶並啓動

su es
./elasticsearch-7.4.2/bin/elasticsearch

測試：http://192.168.244.11:9200/

9、後臺啓動ES

./elasticsearch-7.4.2/bin/elasticsearch -d