记一次elasticsearch集群部署

ES版本：5.6.3

1.在单节点安装测试的时候，遇到了root账号不能启动es问题。

解决方案：切换linux普通用户noroot，并且需要将elasticsearch文件的所有者更改为noroot.

2.elasticsearch启动后，遇到bootstrap checks failed问题。

[code][2] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

是由于操作系统的vm.max_map_count参数设置太小以及linux系统对用户内存大小和文件句柄的限制。

解决方案：修改/etc/sysctl.conf 增加vm.max_map_count=262144(根据异常去设置这个值的大小)   

                  执行 systcl -p 

                  修改/etc/security/limits.conf文件

                  新增：* hard nofile 65536                * soft nofile 65536

                 noroot账号重新登录即可生效。

3.单节点部署完毕，扩展其他节点时，由于参数没有修改正确，抛出了以下异常。

[code][o.e.b.ElasticsearchUncaughtExceptionHandler] [node-3] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: BindTransportException[Failed to bind to [9300-9400]]; nested: BindException[Cannot assign requested address];
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:123) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:70) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:134) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84) ~[elasticsearch-5.6.3.jar:5.6.3]
Caused by: org.elasticsearch.transport.BindTransportException: Failed to bind to [9300-9400]
at org.elasticsearch.transport.TcpTransport.bindToPort(TcpTransport.java:780) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.transport.TcpTransport.bindServer(TcpTransport.java:745) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.transport.netty4.Netty4Transport.doStart(Netty4Transport.java:174) ~[?:?]
at org.elasticsearch.common.component.AbstractLifecycleComponent.start(AbstractLifecycleComponent.java:69) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.transport.TransportService.doStart(TransportService.java:209) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.common.component.AbstractLifecycleComponent.start(AbstractLifecycleComponent.java:69) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.node.Node.start(Node.java:694) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.bootstrap.Bootstrap.start(Bootstrap.java:278) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:351) ~[elasticsearch-5.6.3.jar:5.6.3]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:132) ~[elasticsearch-5.6.3.jar:5.6.3]
... 6 more
Caused by: java.net.BindException: Cannot assign requested address
at sun.nio.ch.Net.bind0(Native Method) ~[?:?]
at sun.nio.ch.Net.bind(Net.java:433) ~[?:?]
at sun.nio.ch.Net.bind(Net.java:425) ~[?:?]
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) ~[?:?]
at io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:128) ~[?:?]
at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:554) ~[?:?]
at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1258) ~[?:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:501) ~[?:?]
at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:486) ~[?:?]
at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:980) ~[?:?]
at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:250) ~[?:?]
at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:365) ~[?:?]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) ~[?:?]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:403) ~[?:?]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:462) ~[?:?]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) ~[?:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_152]

是由于在另外一个节点上没有修改network.host导致的。

        node.name: 每个节点的名称都不一样
        path.data:  每个节点存储数据的路径
        path.logs: 每个节点存储日志的路径
        network.host: 每个节点的ip