1.先下载ElasticSearch6.2.4的压缩包
下载地址:https://www.elastic.co/downloads/past-releases
2.将压缩包上传到Linux系统
3.将压缩包解压缩,得到目录elasticsearch-6.2.4
tar -zxvf elasticsearch-6.2.4.tar.gz
4.进入目录elasticsearch-6.2.4,并启动elasticsearch
cd elasticsearch-6.2.4/bin
./elasticsearch
5.在root权限下启动会报错
[2018-12-09T06:42:26,667][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-6.2.4.jar:6.2.4]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[elasticsearch-6.2.4.jar:6.2.4]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.2.4.jar:6.2.4]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.2.4.jar:6.2.4]
at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.2.4.jar:6.2.4]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-6.2.4.jar:6.2.4]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:85) ~[elasticsearch-6.2.4.jar:6.2.4]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:105) ~[elasticsearch-6.2.4.jar:6.2.4]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:172) ~[elasticsearch-6.2.4.jar:6.2.4]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:323) ~[elasticsearch-6.2.4.jar:6.2.4]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) ~[elasticsearch-6.2.4.jar:6.2.4]
... 6 more
6.解决方式:
bin/elasticsearch -Des.insecure.allow.root=true
或者修改bin/elasticsearch,加上ES_JAVA_OPTS属性:
ES_JAVA_OPTS="-Des.insecure.allow.root=true"
7.再次启动:
[root@localhost bin]# ./elasticsearch -Des.insecure.allow.root=true
starts elasticsearch
Option Description
------ -----------
-E Configure a setting
-V, --version Prints elasticsearch version information and exits
-d, --daemonize Starts Elasticsearch in the background
-h, --help show help
-p, --pidfile Creates a pid file in the specified path on start
-q, --quiet Turns off standard output/error streams logging in console
-s, --silent show minimal output
-v, --verbose show verbose output
ERROR: D is not a recognized option
这是出于系统安全考虑设置的条件,由于ElasticSearch可以接收用户输入的脚本并且执行,为了系统安全考虑,建议创建一个单独的用户用来运行ElasticSearch
8.创建用户组和用户
groupadd esgroup
useradd esuser -g esgroup -p espassword
更改elasticsearch文件夹及内部文件的所属用户及组:
cd /usr/elasticsearch
chown -R esuser:esgroup elasticsearch-6.2.4
切换用户并运行:
su esuser
./bin/elasticsearch
再次启动显示已杀死：
需要调整JVM的内存大小：
vi bin/elasticsearch
ES_JAVA_OPTS="-Xms512m -Xmx512m"
再次启动：启动成功
如果显示如下类似信息：
[INFO ][o.e.c.r.a.DiskThresholdMonitor] [ZAds5FP] low disk watermark [85%] exceeded on [ZAds5FPeTY-ZUKjXd7HJKA][ZAds5FP][/opt/elasticsearch-6.2.4/data/nodes/0] free: 1.2gb[14.2%], replicas will not be assigned to this node
需要清理磁盘空间。
后台运行：./bin/elasticsearch -d
测试连接：curl 127.0.0.1:9200
会看到一下JSON数据：
[root@localhost ~]# curl 127.0.0.1:9200
{
"name" : "rBrMTNx",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "-noR5DxFRsyvAFvAzxl07g",
"version" : {
"number" : "5.1.1",
"build_hash" : "5395e21",
"build_date" : "2016-12-06T12:36:15.409Z",
"build_snapshot" : false,
"lucene_version" : "6.3.0"
},
"tagline" : "You Know, for Search"
}
实现远程访问：
需要对config/elasticsearch.yml进行 配置：
network.host: 192.168.80.188
再次启动报错：
处理第一个错误：
vim /etc/security/limits.conf //文件最后加入
esuser soft nofile 65536
esuser hard nofile 65536
esuser soft nproc 4096
esuser hard nproc 4096
处理第二个错误：
进入limits.d目录下修改配置文件。
vim /etc/security/limits.d/20-nproc.conf
修改为 esuser soft nproc 4096
处理第三个错误：
vim /etc/sysctl.conf
vm.max_map_count=655360
执行以下命令生效：
sysctl -p
关闭防火墙：systemctl stop firewalld.service
再次启动成功！