ElasticSearch 6.x 学习笔记：1.下载安装与配置

1. 安装配置JDK 8

（1）下载并解压缩

[root@node1 ~]# tar -zxvf jdk-8u112-linux-x64.tar.gz -C /opt

（2）编辑环境变量
vi /etc/profile.d/custom.sh

[root@node1 ~]# vi /etc/profile.d/custom.sh[root@node1 ~]# cat /etc/profile.d/custom.sh#!/bin/bash#java pathexport JAVA_HOME=/opt/jdk1.8.0_112export PATH=$PATH:$JAVA_HOME/binexport CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib

（3）生效

[root@node1 ~]# source /etc/profile.d/custom.sh

（4）查看JDK版本

[root@node1 ~]# java -versionjava version "1.8.0_112"Java(TM) SE Runtime Environment (build 1.8.0_112-b15)Java HotSpot(TM) 64-Bit Server VM (build 25.112-b15, mixed mode)[root@node1 ~]#

2. ElasticSearch 6.x 软件包下载

（1）ElasticSearch 相关软件下载官网
https://www.elastic.co/cn/downloads

（2）下载ElasticSearch
https://www.elastic.co/downloads/elasticsearch

[root@node1 ~]# wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.1.0.tar.gz--2017-12-18 07:54:45--  https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.1.0.tar.gzResolving artifacts.elastic.co (artifacts.elastic.co)... 184.73.156.41, 54.225.188.6, 54.235.82.130, ...Connecting to artifacts.elastic.co (artifacts.elastic.co)|184.73.156.41|:443... connected.HTTP request sent, awaiting response... 200 OKLength: 28535876 (27M) [application/x-gzip]Saving to: ‘elasticsearch-6.1.0.tar.gz’100%[==============================================================================================>] 28,535,876  33.8KB/s   in 10m 53s2017-12-18 08:05:39 (42.7 KB/s) - ‘elasticsearch-6.1.0.tar.gz’ saved [28535876/28535876][root@node1 ~]#

（2）解压缩
tar -zxvf elasticsearch-6.1.0.tar.gz

[root@node1 ~]# tar -zxvf elasticsearch-6.1.0.tar.gz -C /optelasticsearch-6.1.0/elasticsearch-6.1.0/lib/........elasticsearch-6.1.0/modules/lang-painless/antlr4-runtime-4.5.3.jarelasticsearch-6.1.0/plugins/[root@node1 ~]# 

3. 创建用户

从5.0开始，ElasticSearch 安全级别提高了，不允许采用root帐号启动，所以我们要添加一个用户。

（1）创建es用户组

[root@node1 ~]# groupadd es

（2）创建用户es
useradd es（用户名） -g es（组名） -p es（密码）

[root@node1 ~]# useradd es -g es -p es

（3）修改权限
更改elasticsearch-6.1.0文件夹以及内部文件的所属用户以及组为es，-R表示逐级（N层目录）

[root@node1 ~]# chown -R es:es /opt/elasticsearch-6.1.0

4. 启动

（1）切换用户

[root@node1 ~]# su es

（2）启动ElasticSearch

[es@node1 root]$ cd /opt/elasticsearch-6.1.0/[es@node1 elasticsearch-6.1.0]$ bin/elasticsearch [2017-12-18T09:23:57,668][INFO ][o.e.n.Node               ] [] initializing ...[2017-12-18T09:23:57,883][INFO ][o.e.e.NodeEnvironment    ] [MD1gu0h] using [1] data paths, mounts [[/ (rootfs)]], net usable_space [15.4gb], net total_space [21.9gb], types [rootfs][2017-12-18T09:23:57,884][INFO ][o.e.e.NodeEnvironment    ] [MD1gu0h] heap size [1007.3mb], compressed ordinary object pointers [true][2017-12-18T09:23:57,887][INFO ][o.e.n.Node               ] node name [MD1gu0h] derived from node ID [MD1gu0heRDeWuoFvGaygqg]; set [node.name] to override[2017-12-18T09:23:57,888][INFO ][o.e.n.Node               ] version[6.1.0], pid[2172], build[c0c1ba0/2017-12-12T12:32:54.550Z], OS[Linux/3.10.0-514.el7.x86_64/amd64], JVM[Oracle Corporation/Java HotSpot(TM) 64-Bit Server VM/1.8.0_112/25.112-b15][2017-12-18T09:23:57,888][INFO ][o.e.n.Node               ] JVM arguments [-Xms1g, -Xmx1g, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly, -XX:+AlwaysPreTouch, -Xss1m, -Djava.awt.headless=true, -Dfile.encoding=UTF-8, -Djna.nosys=true, -XX:-OmitStackTraceInFastThrow, -Dio.netty.noUnsafe=true, -Dio.netty.noKeySetOptimization=true, -Dio.netty.recycler.maxCapacityPerThread=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -XX:+HeapDumpOnOutOfMemoryError, -Des.path.home=/opt/elasticsearch-6.1.0, -Des.path.conf=/opt/elasticsearch-6.1.0/config][2017-12-18T09:24:00,157][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [aggs-matrix-stats][2017-12-18T09:24:00,157][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [analysis-common][2017-12-18T09:24:00,158][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [ingest-common][2017-12-18T09:24:00,158][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [lang-expression][2017-12-18T09:24:00,158][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [lang-mustache][2017-12-18T09:24:00,158][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [lang-painless][2017-12-18T09:24:00,158][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [mapper-extras][2017-12-18T09:24:00,159][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [parent-join][2017-12-18T09:24:00,159][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [percolator][2017-12-18T09:24:00,159][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [reindex][2017-12-18T09:24:00,159][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [repository-url][2017-12-18T09:24:00,159][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [transport-netty4][2017-12-18T09:24:00,160][INFO ][o.e.p.PluginsService     ] [MD1gu0h] loaded module [tribe][2017-12-18T09:24:00,160][INFO ][o.e.p.PluginsService     ] [MD1gu0h] no plugins loaded[2017-12-18T09:24:03,471][INFO ][o.e.d.DiscoveryModule    ] [MD1gu0h] using discovery type [zen][2017-12-18T09:24:04,371][INFO ][o.e.n.Node               ] initialized[2017-12-18T09:24:04,371][INFO ][o.e.n.Node               ] [MD1gu0h] starting ...[2017-12-18T09:24:04,637][INFO ][o.e.t.TransportService   ] [MD1gu0h] publish_address {192.168.80.131:9300}, bound_addresses {192.168.80.131:9300}[2017-12-18T09:24:04,672][INFO ][o.e.b.BootstrapChecks    ] [MD1gu0h] bound or publishing to a non-loopback or non-link-local address, enforcing bootstrap checks[2017-12-18T09:24:07,765][INFO ][o.e.c.s.MasterService    ] [MD1gu0h] zen-disco-elected-as-master ([0] nodes joined), reason: new_master {MD1gu0h}{MD1gu0heRDeWuoFvGaygqg}{AXDov8dlRNGpubGAks8ODA}{192.168.80.131}{192.168.80.131:9300}[2017-12-18T09:24:07,773][INFO ][o.e.c.s.ClusterApplierService] [MD1gu0h] new_master {MD1gu0h}{MD1gu0heRDeWuoFvGaygqg}{AXDov8dlRNGpubGAks8ODA}{192.168.80.131}{192.168.80.131:9300}, reason: apply cluster state (from master [master {MD1gu0h}{MD1gu0heRDeWuoFvGaygqg}{AXDov8dlRNGpubGAks8ODA}{192.168.80.131}{192.168.80.131:9300} committed version [1] source [zen-disco-elected-as-master ([0] nodes joined)]])[2017-12-18T09:24:07,835][INFO ][o.e.h.n.Netty4HttpServerTransport] [MD1gu0h] publish_address {192.168.80.131:9200}, bound_addresses {192.168.80.131:9200}[2017-12-18T09:24:07,835][INFO ][o.e.n.Node               ] [MD1gu0h] started[2017-12-18T09:24:07,851][INFO ][o.e.g.GatewayService     ] [MD1gu0h] recovered [0] indices into cluster_state

ctrl+c停止。
（3）后台运行
可以通过参数-d后台运行

[es@node1 elasticsearch-6.1.0]$ bin/elasticsearch -d

（4）查询进程

[es@node1 elasticsearch-6.1.0]$ jps2327 Elasticsearch2344 Jps[es@node1 elasticsearch-6.1.0]$

5. 验证

使用curl验证

[es@node1 elasticsearch-6.1.0]$ curl localhost:9200{  "name" : "MD1gu0h",  "cluster_name" : "elasticsearch",  "cluster_uuid" : "MRAhTG8pR1mAif_tGg9qYg",  "version" : {    "number" : "6.1.0",    "build_hash" : "c0c1ba0",    "build_date" : "2017-12-12T12:32:54.550Z",    "build_snapshot" : false,    "lucene_version" : "7.1.0",    "minimum_wire_compatibility_version" : "5.6.0",    "minimum_index_compatibility_version" : "5.0.0"  },  "tagline" : "You Know, for Search"}[es@node1 elasticsearch-6.1.0]$

6.异常闪退解决办法

可能出现elasticsearch启动后，闪退现象。

[es@node1 elasticsearch-6.1.0]$ bin/elasticsearch -d[es@node1 elasticsearch-6.1.0]$ jps2933 Jps2918 Elasticsearch[es@node1 elasticsearch-6.1.0]$ jps2947 Jps2918 Elasticsearch[es@node1 elasticsearch-6.1.0]$ jps3023 Jps[es@node1 elasticsearch-6.1.0]$

查看日志

[es@node1 elasticsearch-6.1.0]$ vi logs/elasticsearch.log

发现异常信息

[2017-12-18T08:57:49,869][INFO ][o.e.n.Node               ] initialized[2017-12-18T08:57:49,870][INFO ][o.e.n.Node               ] [MD1gu0h] starting ...[2017-12-18T08:57:50,145][INFO ][o.e.t.TransportService   ] [MD1gu0h] publish_address {192.168.80.131:9300}, bound_addresses {192.168.80.131:9300}[2017-12-18T08:57:50,163][INFO ][o.e.b.BootstrapChecks    ] [MD1gu0h] bound or publishing to a non-loopback or non-link-local address, enforcing bootstrap checks[2017-12-18T08:57:50,169][ERROR][o.e.b.Bootstrap          ] [MD1gu0h] node validation exception[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][2017-12-18T08:57:50,245][INFO ][o.e.n.Node               ] [MD1gu0h] stopping ...[2017-12-18T08:57:50,289][INFO ][o.e.n.Node               ] [MD1gu0h] stopped[2017-12-18T08:57:50,290][INFO ][o.e.n.Node               ] [MD1gu0h] closing ...[2017-12-18T08:57:50,311][INFO ][o.e.n.Node               ] [MD1gu0h] closed

[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]

切换到root用户，

[root@node1 elasticsearch-6.1.0]# vi /etc/sysctl.conf

添加内容如下：

vm.max_map_count=262144

修改文件/etc/security/limits.conf

[root@node1 logs]# vi /etc/security/limits.conf

添加如下内容

* hard nofile 65536* soft nofile 65536* soft nproc 2048* hard nproc 4096# End of file

然后重启即可。

7.修改配置文件

[es@node1 elasticsearch-6.1.0]$ vi config/elasticsearch.yml

修改network.host和http.port

# Set the bind address to a specific IP (IPv4 or IPv6):#network.host: 192.168.80.131## Set a custom port for HTTP:#http.port: 9200

保存退出。

8.再次启动

（1）curl

[root@node1 ~]# curl 192.168.80.131:9200{  "name" : "MD1gu0h",  "cluster_name" : "elasticsearch",  "cluster_uuid" : "MRAhTG8pR1mAif_tGg9qYg",  "version" : {    "number" : "6.1.0",    "build_hash" : "c0c1ba0",    "build_date" : "2017-12-12T12:32:54.550Z",    "build_snapshot" : false,    "lucene_version" : "7.1.0",    "minimum_wire_compatibility_version" : "5.6.0",    "minimum_index_compatibility_version" : "5.0.0"  },  "tagline" : "You Know, for Search"}[root@node1 ~]# 

（2）使用浏览器打开

如果在Windows平台通过浏览器打开，需要配置hosts。编辑C:\Windows\System32\drivers\etc\hosts
添加

192.168.80.131  node1