Elasticsearch 入门：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: 9200node.name: node-1cluster.name: es_clusternetwork.host: 192.168.1.222bootstrap.memory_lock: falsepath.data: /usr/local/elasticsearch/datapath.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 failedmax 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           65536elsearch               hard    nofile           65536elsearch               soft    nproc            2048elsearch               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）