問題：

　　es安裝好之后，使用root啟動會報錯：can not run elasticsearch as root

[root@iZbp1bb2egi7w0ueys548pZ bin]# ./elasticsearch [2019-01-21T09:50:59,387][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main] org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as rootat org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:134) ~[elasticsearch-6.0.0.jar:6.0.0]at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:121) ~[elasticsearch-6.0.0.jar:6.0.0]at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:69) ~[elasticsearch-6.0.0.jar:6.0.0]at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:134) ~[elasticsearch-6.0.0.jar:6.0.0]at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-6.0.0.jar:6.0.0]at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-6.0.0.jar:6.0.0]at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:85) ~[elasticsearch-6.0.0.jar:6.0.0] Caused by: java.lang.RuntimeException: can not run elasticsearch as rootat org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:104) ~[elasticsearch-6.0.0.jar:6.0.0]at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:171) ~[elasticsearch-6.0.0.jar:6.0.0]at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:322) ~[elasticsearch-6.0.0.jar:6.0.0]at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:130) ~[elasticsearch-6.0.0.jar:6.0.0]... 6 more

原因：

　　為了安全不允許使用root用戶啟動

解決：

　　es5之后的都不能使用添加啟動參數或者修改配置文件等方法啟動了，必須要創建用戶

?

　　1、創建用戶：elasticsearch

[root@iZbp1bb2egi7w0ueys548pZ bin]# adduser elasticsearch

　　2、創建用戶密碼，需要輸入兩次

[root@iZbp1bb2egi7w0ueys548pZ bin]# passwd elasticsearch

　　3、將對應的文件夾權限賦給該用戶

[root@iZbp1bb2egi7w0ueys548pZ local]# chown -R elasticsearch-6.0.0 elasticsearch

　　4、切換至elasticsearch用戶

[root@iZbp1bb2egi7w0ueys548pZ etc]# su elasticsearch

　　5、進入啟動目錄啟動 /usr/local/elasticsearch-6.0.0/bin

bash-4.2$ ./elasticsearch

　　6、啟動后測試

　　輸入ip:9200,如果返回一個json數據說明啟動成功

可能遇到的問題

　　1、啟動后訪問ip:9200沒有顯示json

　　

[root@iZbp1bb2egi7w0ueys548qZ ~]# curl 10.132.131.51:9200 curl: (7) Failed connect to 10.132.131.51:9200; Connection refused

?

　　解決：

　　修改elasticsearch.yml文件，添加

　　network.host: 0.0.0.0

　　再次啟動就可以了

[root@iZbp1bb2egi7w0ueys548qZ ~]# curl 10.132.131.51:9200 {"name" : "dMD7fZd","cluster_name" : "elasticsearch","cluster_uuid" : "Cy4a99t2Sw2_hnJ_jtdRgA","version" : {"number" : "6.0.0","build_hash" : "8f0685b","build_date" : "2017-11-10T18:41:22.859Z","build_snapshot" : false,"lucene_version" : "7.0.1","minimum_wire_compatibility_version" : "5.6.0","minimum_index_compatibility_version" : "5.0.0"},"tagline" : "You Know, for Search" }

?

轉載于:https://www.cnblogs.com/gcgc/p/10297563.html

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