Elasticsearch can not run elasticsearch as root

ES启动报错

[2019-04-24T17:27:27,226][ERROR][o.e.b.Bootstrap          ] [root] Exception
java.lang.RuntimeException: can not run elasticsearch as root
        at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:102) ~[elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:169) ~[elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:325) [elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) [elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) [elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) [elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) [elasticsearch-cli-7.0.0.jar:7.0.0]
        at org.elasticsearch.cli.Command.main(Command.java:90) [elasticsearch-cli-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:115) [elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) [elasticsearch-7.0.0.jar:7.0.0]
[2019-04-24T17:27:27,247][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [root] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:163) ~[elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) ~[elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-7.0.0.jar:7.0.0]
        at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:115) ~[elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-7.0.0.jar:7.0.0]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
        at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:102) ~[elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:169) ~[elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:325) ~[elasticsearch-7.0.0.jar:7.0.0]
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~[elasticsearch-7.0.0.jar:7.0.0]
        ... 6 more

解决方案

不能以root角色启动

• 创建elsearch用户组及elsearch用户

groupadd elsearch
useradd elsearch -g elsearch -p elasticsearch

• 更改elasticsearch文件夹及内部文件的所属用户及组为elsearch:elsearch

chown -R elsearch:elsearch elasticsearch-7.0.0

• 切换到elsearch用户再启动

su elsearch
./elasticsearch -d