ES安装

1、下载elasticsearch7.6.0

https://www.elastic.co/guide/en/elasticsearch/reference/7.6/targz.html

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.6.0-linux-x86_64.tar.gz
tar -xzf elasticsearch-7.6.0-linux-x86_64.tar.gz
cd elasticsearch-7.6.2/
./bin/elasticsearch 

 

2、安装ik分词器

https://blog.csdn.net/a159951333/article/details/124302400

 unzip -o elasticsearch-analysis-ik-7.6.0.zip -d ik-analyzer

mv ik-analyzer /soft/elasticsearch/plugins/

 

3、修改配置

vim elasticsearch.yml

network.host: 0.0.0.0
http.port: 9200
discovery.seed_hosts: ["127.0.0.1"]
cluster.initial_master_nodes: ["node-1"]

 

 ./bin/elasticsearch 

 

4、常见问题

问题1：无法使用root启动

java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:105)
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:172)
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:349)
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170)
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161)
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:125)
at org.elasticsearch.cli.Command.main(Command.java:90)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92)
For complete error details, refer to the log at /soft/elasticsearch-7.6.0/logs/elasticsearch.log

解决方法https://blog.csdn.net/ichen820/article/details/122414312
adduser es
passwd es
chown -R es:es elasticsearch-6.8.9/
chmod 770 elasticsearch-6.8.9/
useradd es
su es

 

问题2：max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

vim /etc/sysctl.conf  添加vm.max_map_count = 262144   参考https://blog.csdn.net/lsqtzj/article/details/123767421

问题3：the default discovery settings are unsuitable for production use； at least...

vim config/elasticsearch.yml

#添加配置

discovery.seed_hosts: ["127.0.0.1"]
cluster.initial_master_nodes: ["node-1"]

问题4：解决max number of threads [3818] for user [es] is too low, increase to at least [4096]

vim  /etc/security/limits.conf

soft nproc 4096
soft nproc 4096

重启后用查看

ulimit -Hu

ulimit -Su 

 

5、测试

POST http://192.168.110.128:9200/_analyze?pretty

User-Agent: Fiddler
Host: 192.168.110.128:9200
Content-Type: application/json
Content-Length: 59

{ "analyzer": "ik_smart", "text": "中国人民共和国" }