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1、使用root用户启动失败
在有一次搭建elasticsearch的时候，使用systemctl启动elasticsearch失败，然后在bin目录下面去使用启动脚本启动，发现报错不能用root用户启动，报“Caused by: java.lang.RuntimeException: can not run elasticsearch as root”： [root@localhost bin]# ./elasticsearch [2017-12-20T17:01:47,922][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [node-1] 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:125) ~[elasticsearch-6.1.1.jar:6.1.1] at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[elasticsearch-6.1.1.jar:6.1.1] at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.1.1.jar:6.1.1] at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.1.1.jar:6.1.1] at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.1.1.jar:6.1.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-6.1.1.jar:6.1.1] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:85) ~[elasticsearch-6.1.1.jar:6.1.1] Caused by: java.lang.RuntimeException: can not run elasticsearch as root at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:104) ~[elasticsearch-6.1.1.jar:6.1.1] at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:171) ~[elasticsearch-6.1.1.jar:6.1.1] at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:322) ~[elasticsearch-6.1.1.jar:6.1.1] at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) ~[elasticsearch-6.1.1.jar:6.1.1] ... 6 more [root@localhost bin]# cd .. 解决：创建一个独立的用户，比如elk来启动elasticsearch，不用root用户启动 2、elasticsearch安装目录权限不对遇到启动elasticsearch失败，使用的是专门的用户elk来启动的，启动日志提示不能加载配置文件： [elk@docker bin]$ ./elasticsearch Exception in thread "main" 2018-06-03 17:36:23,881 main ERROR No log4j2 configuration file found. Using default configuration: logging only errors to the console. Set system property 'log4j2.debug' to show Log4j2 internal initialization logging. 2018-06-03 17:36:24,113 main ERROR Could not register mbeans java.security.AccessControlException: access denied ("javax.management.MBeanTrustPermission" "register") at java.security.AccessControlContext.checkPermission(AccessControlContext.java:472) at java.lang.SecurityManager.checkPermission(SecurityManager.java:585) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.checkMBeanTrustPermission(DefaultMBeanServerInterceptor.java:1848) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:322) at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522) at org.apache.logging.log4j.core.jmx.Server.register(Server.java:389) at org.apache.logging.log4j.core.jmx.Server.reregisterMBeansAfterReconfigure(Server.java:167) at org.apache.logging.log4j.core.jmx.Server.reregisterMBeansAfterReconfigure(Server.java:140) at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:556) at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:617) at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:634) at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:229) at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:242) at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45) at org.apache.logging.log4j.LogManager.getContext(LogManager.java:174) at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:618) at org.elasticsearch.common.logging.ESLoggerFactory.getLogger(ESLoggerFactory.java:54) at org.elasticsearch.common.logging.ESLoggerFactory.getLogger(ESLoggerFactory.java:62) at org.elasticsearch.common.logging.Loggers.getLogger(Loggers.java:101) at org.elasticsearch.ExceptionsHelper.(ExceptionsHelper.java:42) at org.elasticsearch.ElasticsearchException.toString(ElasticsearchException.java:663) at java.lang.String.valueOf(String.java:2994) at java.io.PrintStream.println(PrintStream.java:821) at java.lang.Throwable$WrappedPrintStream.println(Throwable.java:748) at java.lang.Throwable.printStackTrace(Throwable.java:655) at java.lang.Throwable.printStackTrace(Throwable.java:643) at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1061) at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1052) at java.lang.Thread.dispatchUncaughtException(Thread.java:1959) SettingsException[Failed to load settings from /usr/local/elasticsearch-5.6.0/config/elasticsearch.yml]; nested: AccessDeniedException[/usr/local/elasticsearch-5.6.0/config/elasticsearch.yml]; at org.elasticsearch.node.InternalSettingsPreparer.prepareEnvironment(InternalSettingsPreparer.java:102) at org.elasticsearch.cli.EnvironmentAwareCommand.createEnv(EnvironmentAwareCommand.java:72) at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67) at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:134) at org.elasticsearch.cli.Command.main(Command.java:90) at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84) Caused by: java.nio.file.AccessDeniedException: /usr/local/elasticsearch-5.6.0/config/elasticsearch.yml at sun.nio.fs.UnixException.translateToIOException(UnixException.java:84) at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102) at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107) at sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:214) at java.nio.file.Files.newByteChannel(Files.java:361) at java.nio.file.Files.newByteChannel(Files.java:407) at java.nio.file.spi.FileSystemProvider.newInputStream(FileSystemProvider.java:384) at java.nio.file.Files.newInputStream(Files.java:152) at org.elasticsearch.common.settings.Settings$Builder.loadFromPath(Settings.java:1032) at org.elasticsearch.node.InternalSettingsPreparer.prepareEnvironment(InternalSettingsPreparer.java:100) ... 6 more [elk@docker bin]$ 解决：看到“Caused by: java.nio.file.AccessDeniedException: /usr/local/elasticsearch-5.6.0/config/elasticsearch.yml”的提示，就去检查目录的权限，果然是root:root权限，使用elk用户去启动，就报错了。将目录的权限改成elk:elk就好了。 [root@docker ~]# ll /usr/local/ drwxr-xr-x 7 root root 123 9月 7 2017 elasticsearch-5.6.0 [root@docker local]# chown -R elk:elk elasticsearch-5.6.0 [root@docker local]# ll drwxr-xr-x 7 elk elk 123 9月 7 2017 elasticsearch-5.6.0 3、使用yum安装方式，赋权错误，启动失败在一次使用yum安装elasticsearch的时候，执行完yum -y install elasticsearch 命令后，进行了下面的操作：1、修改elasticsearch.yml文件 2、创建elk用户3、创建/opt/elk/data目录，并且赋权为elk:elk4、修改/var/log/elasticsearch权限为elk:elk5、启动服务，但是报下面的错（截取了部分）： [root@test101 init.d]# ./elasticsearch start Starting elasticsearch: 2018-06-12 15:13:50,287 main ERROR Unable to create file /var/log/elasticsearch/elk.log java.io.IOEx |
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