安装环境 CentOS release 7
1、因Elasticsearch是基于Java写的，所以它的运行环境中需要java的支持，在Linux下执行命令：java -version，检查Jar包是否安装
安装java版本至少是1.8以上
检查当前系统是否有jdk java -version rpm -qa|grep java 移除当前系统安装的jdk rpm -e xxx
2、首先准备下载Elasticsearch5.5.0 安装包
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.5.0.tar.gz
3、下载到/usr/local 目录下，解压
tar -zxvf elasticsearch-5.5.0.tar.gz
4、因为Elasticsearch5.0之后，不能使用root账户启动，我们先创建一个elasticsearch组和账户
groupadd elasticsearch useradd elasticsearch -g elasticsearch -p elasticsearch chown -R elasticsearch:elasticsearch elasticsearch-5.5.0
5、启动elasticsearch
cd /usr/local/elasticsearch5.5.0/ su elasticsearch ./bin/elasticsearch //或用以下命令 su - elasticsearch -c "/usr/local/elasticsearch-5.5.0/bin/elasticsearch -d"
这时候我们看见下面的提示，说明就成功了
[plain] view plain copy print? [elasticsearch@vmlnx-sma bin]$ ./elasticsearch [2017-03-02T21:43:21,185][INFO ][o.e.n.Node ] [] initializing ... [2017-03-02T21:43:21,264][INFO ][o.e.e.NodeEnvironment ] [uY3prpy] using [1] data paths, mounts [[/ (/dev/mapper/VolGroup-lv_root)]], net usable_space [43.5gb], net total_space [54.6gb], spins? [possibly], types [ext4] [2017-03-02T21:43:21,265][INFO ][o.e.e.NodeEnvironment ] [uY3prpy] heap size [1.9gb], compressed ordinary object pointers [true] [2017-03-02T21:43:21,268][INFO ][o.e.n.Node ] node name [uY3prpy] derived from node ID [uY3prpyqTHim5twauiVWhQ]; set [node.name] to override [2017-03-02T21:43:21,271][INFO ][o.e.n.Node ] version[5.2.2], pid[5602], build[f9d9b74/2017-02-24T17:26:45.835Z], OS[Linux/3.10.5-3.el6.x86_64/amd64], JVM[Oracle Corporation/OpenJDK 64-Bit Server VM/1.8.0_121/25.121-b13] [2017-03-02T21:43:22,226][INFO ][o.e.p.PluginsService ] [uY3prpy] loaded module [aggs-matrix-stats] [2017-03-02T21:43:22,226][INFO ][o.e.p.PluginsService ] [uY3prpy] loaded module [ingest-common] [2017-03-02T21:43:22,226][INFO ][o.e.p.PluginsService ] [uY3prpy] loaded module [lang-expression] [2017-03-02T21:43:22,227][INFO ][o.e.p.PluginsService ] [uY3prpy] loaded module [lang-groovy] [2017-03-02T21:43:22,227][INFO ][o.e.p.PluginsService ] [uY3prpy] loaded module [lang-mustache] [2017-03-02T21:43:22,227][INFO ][o.e.p.PluginsService ] [uY3prpy] loaded module [lang-painless] [2017-03-02T21:43:22,228][INFO ][o.e.p.PluginsService ] [uY3prpy] loaded module [percolator] [2017-03-02T21:43:22,228][INFO ][o.e.p.PluginsService ] [uY3prpy] loaded module [reindex] [2017-03-02T21:43:22,228][INFO ][o.e.p.PluginsService ] [uY3prpy] loaded module [transport-netty3] [2017-03-02T21:43:22,229][INFO ][o.e.p.PluginsService ] [uY3prpy] loaded module [transport-netty4] [2017-03-02T21:43:22,230][INFO ][o.e.p.PluginsService ] [uY3prpy] no plugins loaded [2017-03-02T21:43:24,689][INFO ][o.e.n.Node ] initialized [2017-03-02T21:43:24,689][INFO ][o.e.n.Node ] [uY3prpy] starting ... [2017-03-02T21:43:24,929][INFO ][o.e.t.TransportService ] [uY3prpy] publish_address {10.245.250.65:9300}, bound_addresses {10.245.250.65:9300} [2017-03-02T21:43:24,948][INFO ][o.e.b.BootstrapChecks ] [uY3prpy] bound or publishing to a non-loopback or non-link-local address, enforcing bootstrap checks [2017-03-02T21:43:28,010][INFO ][o.e.c.s.ClusterService ] [uY3prpy] new_master {uY3prpy}{uY3prpyqTHim5twauiVWhQ}{AqALBH68RCucWcPmHCE6dw}{10.245.250.65}{10.245.250.65:9300}, reason: zen-disco-elected-as-master ([0] nodes joined) [2017-03-02T21:43:28,034][INFO ][o.e.h.HttpServer ] [uY3prpy] publish_address {10.245.250.65:9200}, bound_addresses {10.245.250.65:9200} [2017-03-02T21:43:28,034][INFO ][o.e.n.Node ] [uY3prpy] started [2017-03-02T21:43:28,061][INFO ][o.e.g.GatewayService ] [uY3prpy] recovered [0] indices into cluster_state
执行
curl http://localhost:9200
打开另一个终端进行测试：
curl 'http://localhost:9200/?pretty'
你能看到以下返回信息：
{ "status": 200, "name": "Shrunken Bones", "version": { "number": "1.4.0", "lucene_version": "4.10" }, "tagline": "You Know, for Search" }
开机启动配置
chmod +x /etc/rc.d/rc.local vim /etc/rc.d/rc.local su - elasticsearch -c "/usr/local/elasticsearch-5.5.0/bin/elasticsearch -d"
说明安装成功。
但是我们希望能够使用ip访问，那么还需要设置相关内容
跳转到Elasticsearch的config配置文件下，使用vim打开elasticsearch.yml，找到里面的"network.host",将其改为本机IP,保存。
cd elasticsearch/config/
vim elasticsearch.yml
重启ElasticSearch，浏览器访问验证
http://192.168.37.137:9200
安装nodejs
//yum方式安装 切换到root用户安装 curl –silent –location https://rpm.nodesource.com/setup_6.x | bash - sudo yum -y install nodejs //查看版本 node –v v6.10.3 npm –v 3.10.10
安装elasticsearch-head插件
cd /usr/local git clone git://github.com/mobz/elasticsearch-head.git //yum install -y git //更改elasticsearch.yml http.cors.enabled: true //是否支持跨域 http.cors.allow-origin: "*" //表示支持所有域名 #http.cors.allow-headers: Authorization //安装了xpack，启用了basic authentication //查看当前head插件目录下有无node_modules/grunt目录： //没有：执行命令创建： npm install grunt --save cd elasticsearch-head //安装head插件： npm install //或者使用重定向安装： npm install -g cnpm --registry=https://registry.npm.taobao.org //安装grunt： npm install -g grunt-cli //打开elasticsearch-head-master/Gruntfile.js，找到下面connect属性，新增hostname: ‘0.0.0.0’: connect: { server: { options: { hostname: '0.0.0.0', port: 9100, base: '.', keepalive: true } } } //检查head根目录下是否存在base文件夹 //没有：将 _site下的base文件夹及其内容复制到head根目录下 cp -r _site/base ./ //启动grunt server： //在head下运行grunt server -d启动head插件 访问head插件： http://localhost:9100（启动后会有提示：Started connect web server on http://localhost:9100）
必做优化
禁用swap
sudo swapoff -a
修改linux内核参数
sudo vim /etc/security/limits.conf //添加如下内容: * soft nofile 65536 * hard nofile 131072 * soft memlock unlimited * hard memlock unlimited
修改虚拟内存空间及swap使用率
sudo vim /etc/sysctl.conf vm.zone_reclaim_mode=0 vm.max_map_count=655360 vm.swappiness=1
内核配置立即生效
sudo sysctl -p
修改创建本地线程数
sudo vim /etc/security/limits.d/90-nproc.conf //修改为 * soft nproc 2048
我们常见错误：
问题一：警告提示
[2016-11-06T16:27:21,712][WARN ][o.e.b.JNANatives ] unable to install syscall filter: java.lang.UnsupportedOperationException: seccomp unavailable: requires kernel 3.5+ with CONFIG_SECCOMP and CONFIG_SECCOMP_FILTER compiled in at org.elasticsearch.bootstrap.Seccomp.linuxImpl(Seccomp.java:349) ~[elasticsearch-5.0.0.jar:5.0.0] at org.elasticsearch.bootstrap.Seccomp.init(Seccomp.java:630) ~[elasticsearch-5.0.0.jar:5.0.0]
报了一大串错误，其实只是一个警告。
解决：使用心得linux版本，就不会出现此类问题了。
问题二：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 [lishang] likely too low, increase to at least [2048]
解决：切换到root用户，编辑limits.conf 添加类似如下内容
vi /etc/security/limits.conf //添加如下内容: * soft nofile 65536 * hard nofile 131072 * soft nproc 2048 * hard nproc 4096
问题三：max number of threads [1024] for user [lish] likely too low, increase to at least [2048]
解决：切换到root用户，进入limits.d目录下修改配置文件。
vi /etc/security/limits.d/90-nproc.conf //修改如下内容： * soft nproc 1024 //修改为 * soft nproc 2048
