Linux下安装ElasticSearch

linux下使用wget下载jdk8

进到目录/usr/local/software

wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u141-b15/336fa29ff2bb4ef291e347e091f7f4a7/jdk-8u141-linux-x64.tar.gz"

vim /etc/profile
写入

export JAVA_HOME=/usr/local/software/jdk8
export JAVA_BIN=/usr/local/software/jdk8
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME JAVA_BIN PATH CLASSPATH

source /etc/profile
java -version

java version "1.8.0_141"
Java(TM) SE Runtime Environment (build 1.8.0_141-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.141-b15, mixed mode)

使用wget 下载elasticsearch安装包

wget  https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.2.2.tar.gz

解压

tar -zxvf elasticsearch-6.2.2.tar.gz 

配置es出现相关问题处理：

1、问题一

Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000c5330000, 986513408, 0) failed; error='Cannot allocate memory' (errno=12)

There is insufficient memory for the Java Runtime Environment to continue.
Native memory allocation (mmap) failed to map 986513408 bytes for committing reserved memory.
An error report file with more information is saved as:/usr/local/software/temp/elasticsearch-6.2.2/hs_err_pid1912.log

解决：内存不够，购买阿里云的机器可以动态增加内存,2G内存起步

2、问题二

[root@iZwz95j86y235aroi85ht0Z bin]# ./elasticsearch
[2018-02-22T20:14:04,870][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] 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-6.2.2.jar:6.2.2]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[elasticsearch-6.2.2.jar:6.2.2]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.2.2.jar:6.2.2]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.2.2.jar:6.2.2]

解决：用非root用户
添加用户：useradd -m 用户名 然后设置密码 passwd 用户名

3、问题三

./elasticsearch
Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/software/temp/elasticsearch-6.2.2/config/jvm.options

解决：权限不够 chmod 777 -R 当前es目录

常见配置问题资料：https://www.jianshu.com/p/c5d6ec0f35e0