CentOS 5.6 安装 Elasticsearch 5.0

0. 操作系统：CentOS release 5.6 i686 athlon i386 GNU/Linux

1. 安装 java jdk1.8 （参考：Centos 6.5 安装java及设置默认jdk版本）
2. 下载安装包：elasticsearch-5.0.0.tar.zip

注：此为虚拟机测试，以下系统资源配置会较低。

解压文件

# tar zxvf elasticsearch-5.0.0.tar.gz
# mv elasticsearch-5.0.0 /usr/local/elasticsearch
# mkdir -p /usr/local/elasticsearch/{data,logs}

配置 es 参数文件 （Important Elasticsearch configuration）

# vi /usr/local/elasticsearch/config/elasticsearch.yml
# 注意冒号后有空格
http.port: 9200
node.name: node-1
cluster.name: es_cluster
network.host: 192.168.1.222
bootstrap.memory_lock: false
path.data: /usr/local/elasticsearch/data
path.logs: /usr/local/elasticsearch/logs

配置足够内存 （Set JVM heap size via jvm.options）

# vi /usr/local/elasticsearch/config/jvm.options
-Xms512M
-Xmx512M

配置环境变量

# vi /etc/profile  
export ES_HOME=/usr/local/elasticsearch
 
# source /etc/profile

添加独立用户,并启动服务

# groupadd elsearch
# useradd elsearch -g elsearch
# chown -R elsearch:elsearch /usr/local/elasticsearch
# su elsearch
# cd /usr/local/elasticsearch/bin
# ./elasticsearch

可能错误(一)

ERROR: bootstrap checks failed
max file descriptors [4096] for elasticsearch process likely too low,increase to at least [65536]
max number of threads [1024] for user [elsearch] likely too low,increase to at least [2048]
max virtual memory areas vm.max_map_count [65530] likely too low,increase to at least [262144]


解决：修改配置
# https://www.elastic.co/guide/en/elasticsearch/reference/master/setting-system-settings.html

# vi /etc/security/limits.conf		#永久设置
elsearch               soft    nofile           65536
elsearch               hard    nofile           65536
elsearch               soft    nproc            2048
elsearch               hard    nproc            2048

# ulimit -n 65536			#临时设置，重启无效
# ulimit -u 2048
# ulimit -a

# vi /etc/sysctl.conf			#永久设置
vm.max_map_count=262144

# sysctl -w vm.max_map_count=262144	#临时设置，重启无效
# sysctl -a | grep "vm.max_map_count"

可能错误(二)

Java HotSpot(TM) Server VM warning: INFO: os::commit_memory(0xcc000000,469762048,0) 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 469762048 bytes for committing reserved memory.
# An error report file with more information is saved as:
# /usr/local/elasticsearch/bin/hs_err_pid7598.log


解决：修改足够的内存

# vi /usr/local/elasticsearch/config/jvm.options
-Xms512M
-Xmx512M

# vi /usr/local/elasticsearch/bin/elasticsearch
# ES_JAVA_OPTS="-Xms512m -Xmx512m" $ES_HOME/bin/elasticsearch

正常启动服务状态

[2017-01-07T12:18:21,508][INFO ][o.e.n.Node               ] [node-1] initializing ...
[2017-01-07T12:18:21,814][INFO ][o.e.e.NodeEnvironment    ] [node-1] using [1] data paths,mounts [[/ (/dev/sda2)]],net usable_space [11gb],net total_space [17.7gb],spins? [possibly],types [ext3]
[2017-01-07T12:18:21,816][INFO ][o.e.e.NodeEnvironment    ] [node-1] heap size [505.6mb],compressed ordinary object pointers [unknown]
[2017-01-07T12:18:21,849][INFO ][o.e.n.Node               ] [node-1] version[5.0.0],pid[16529],build[253032b/2016-10-26T04:37:51.531Z],OS[Linux/2.6.18-238.el5/i386],JVM[Oracle Corporation/Java HotSpot(TM) Server VM/1.8.0_111/25.111-b14]
[2017-01-07T12:18:30,971][INFO ][o.e.p.PluginsService     ] [node-1] loaded module [aggs-matrix-stats]
[2017-01-07T12:18:30,972][INFO ][o.e.p.PluginsService     ] [node-1] loaded module [ingest-common]
[2017-01-07T12:18:30,972][INFO ][o.e.p.PluginsService     ] [node-1] loaded module [lang-expression]
[2017-01-07T12:18:30,972][INFO ][o.e.p.PluginsService     ] [node-1] loaded module [lang-groovy]
[2017-01-07T12:18:30,972][INFO ][o.e.p.PluginsService     ] [node-1] loaded module [lang-mustache]
[2017-01-07T12:18:30,972][INFO ][o.e.p.PluginsService     ] [node-1] loaded module [lang-painless]
[2017-01-07T12:18:30,972][INFO ][o.e.p.PluginsService     ] [node-1] loaded module [percolator]
[2017-01-07T12:18:30,974][INFO ][o.e.p.PluginsService     ] [node-1] loaded module [reindex]
[2017-01-07T12:18:30,974][INFO ][o.e.p.PluginsService     ] [node-1] loaded module [transport-netty3]
[2017-01-07T12:18:30,975][INFO ][o.e.p.PluginsService     ] [node-1] loaded module [transport-netty4]
[2017-01-07T12:18:30,976][INFO ][o.e.p.PluginsService     ] [node-1] no plugins loaded
[2017-01-07T12:18:55,728][INFO ][o.e.n.Node               ] [node-1] initialized
[2017-01-07T12:18:55,728][INFO ][o.e.n.Node               ] [node-1] starting ...
[2017-01-07T12:18:59,185][INFO ][o.e.t.TransportService   ] [node-1] publish_address {192.168.1.222:9300},bound_addresses {192.168.1.222:9300}
[2017-01-07T12:18:59,277][INFO ][o.e.b.BootstrapCheck     ] [node-1] bound or publishing to a non-loopback or non-link-local address,enforcing bootstrap checks
[2017-01-07T12:19:03,447][INFO ][o.e.c.s.ClusterService   ] [node-1] new_master {node-1}{8x-utN34QFqJmeeIhrTGjA}{euJKK9YNSSueCM__ko6O8Q}{192.168.1.222}{192.168.1.222:9300},reason: zen-disco-elected-as-master ([0] nodes joined)
[2017-01-07T12:19:03,636][INFO ][o.e.h.HttpServer         ] [node-1] publish_address {192.168.1.222:9200},bound_addresses {192.168.1.222:9200}
[2017-01-07T12:19:03,636][INFO ][o.e.n.Node               ] [node-1] started
[2017-01-07T12:19:03,637][INFO ][o.e.g.GatewayService     ] [node-1] recovered [0] indices into cluster_state
[2017-01-07T12:23:04,309][INFO ][o.e.m.j.JvmGcMonitorService] [node-1] [gc][young][248][9] duration [723ms],collections [1]/[1s],total [723ms]/[1.7s],memory [72.1mb]->[37mb]/[505.6mb],all_pools {[young] [51.2mb]->[172.8kb]/[51.2mb]}{[survivor] [6.3mb]->[4.7mb]/[6.3mb]}{[old] [14.4mb]->[32.3mb]/[448mb]}
[2017-01-07T12:23:04,310][WARN ][o.e.m.j.JvmGcMonitorService] [node-1] [gc][248] overhead,spent [723ms] collecting in the last [1s]

浏览器打开网址：http://192.168.1.222:9200/ （出现当前集群节点信息）

{
  "name" : "node-1","cluster_name" : "es_cluster","cluster_uuid" : "3DUO7WigT9m0pqMz-QlR4g","version" : {
    "number" : "5.0.0","build_hash" : "253032b","build_date" : "2016-10-26T04:37:51.531Z","build_snapshot" : false,"lucene_version" : "6.2.0"
  },"tagline" : "You Know,for Search"
}

参考：Installing Elasticsearch

Elasticsearch 权威指南（中文版）