ElasticSearch快速入门

安装包下载

1）Elasticsearch官网： https://www.elastic.co/products/elasticsearch 

 

单节点Linux环境安装

1、解压elasticsearch-5.2.2.tar.gz到/opt/module目录下
tar -zxvf elasticsearch-5.2.2.tar.gz -C /opt/module/

2、在/opt/module/elasticsearch-5.2.2路径下创建data和logs文件夹

3、修改配置文件/opt/module/elasticsearch-5.2.2/config/elasticsearch.yml

# ---------------------------------- Cluster -----------------------------------
cluster.name: my-application
# ------------------------------------ Node ------------------------------------
node.name: node-102
# ----------------------------------- Paths ------------------------------------
path.data: /opt/module/elasticsearch-5.2.2/data
path.logs: /opt/module/elasticsearch-5.2.2/logs
# ----------------------------------- Memory -----------------------------------
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
# ---------------------------------- Network -----------------------------------
network.host: 192.168.1.102 
# --------------------------------- Discovery ----------------------------------
discovery.zen.ping.unicast.hosts: ["hadoop102"]

 

cluster.name

如果要配置集群需要两个节点上的elasticsearch配置的cluster.name相同，都启动可以自动组成集群，这里如果不改cluster.name则默认是cluster.name=my-application，

nodename

随意取但是集群内的各节点不能相同

修改后的每行前面不能有空格，修改后的“：”后面必须有一个空格

4、配置linux系统环境（参考：http://blog.csdn.net/satiling/article/details/59697916）

 

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

问题四：max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]

解决：切换到root用户修改配置sysctl.conf    vi /etc/sysctl.conf  添加下面配置：

vm.max_map_count=655360

并执行命令：sysctl -p

然后，重新启动elasticsearch，即可启动成功。

 

5、启动集群

bin/elasticsearch

6、测试

7、关闭

kill -9 进程号

 

Elasticsearch head插件安装

1）下载插件
https://github.com/mobz/elasticsearch-head
elasticsearch-head-master.zip

2）nodejs官网下载安装包
https://nodejs.org/dist/
node-v6.9.2-linux-x64.tar.xz

3）将elasticsearch-head-master.zip和node-v6.9.2-linux-x64.tar.xz都导入到linux的/opt/software目录。

4）安装nodejs   tar -zxvf node-v6.9.2-linux-x64.tar.gz -C /opt/module/

5）配置nodejs环境变量

[root@hadoop102 software]# vi /etc/profile
export NODE_HOME=/opt/module/node-v6.9.2-linux-x64
export PATH=$PATH:$NODE_HOME/bin
[root@hadoop102 software]# source /etc/profile

6）查看node和npm版本

[root@hadoop102 software]# node -v
v6.9.2
[root@hadoop102 software]# npm -v
3.10.9

7）解压head插件到/opt/module目录下   unzip elasticsearch-head-master.zip -d /opt/module/

8）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

9）安装head插件
npm install -g cnpm --registry=https://registry.npm.taobao.org

10）安装grunt
npm install -g grunt-cli

11）编辑Gruntfile.js
vim Gruntfile.js

文件93行添加hostname:'0.0.0.0'
options: {
        hostname:'0.0.0.0',
        port: 9100,
        base: '.',
        keepalive: true
      }

12）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

mkdir base
cp base/* ../base/

13）启动grunt server
grunt server -d
Running "connect:server" (connect) task
[D] Task source: /opt/module/elasticsearch-head-master/node_modules/grunt-contrib-connect/tasks/connect.js
Waiting forever...
Started connect web server on http://localhost:9100

如果提示grunt的模块没有安装：

Local Npm module “grunt-contrib-clean” not found. Is it installed?
Local Npm module “grunt-contrib-concat” not found. Is it installed?
Local Npm module “grunt-contrib-watch” not found. Is it installed?
Local Npm module “grunt-contrib-connect” not found. Is it installed?
Local Npm module “grunt-contrib-copy” not found. Is it installed?
Local Npm module “grunt-contrib-jasmine” not found. Is it installed?
Warning: Task “connect:server” not found. Use –force to continue.
执行以下命令：
npm install grunt-contrib-clean -registry=https://registry.npm.taobao.org
npm install grunt-contrib-concat -registry=https://registry.npm.taobao.org
npm install grunt-contrib-watch -registry=https://registry.npm.taobao.org
npm install grunt-contrib-connect -registry=https://registry.npm.taobao.org
npm install grunt-contrib-copy -registry=https://registry.npm.taobao.org
npm install grunt-contrib-jasmine -registry=https://registry.npm.taobao.org
最后一个模块可能安装不成功，但是不影响使用。

14）浏览器访问head插件
http://hadoop102:9100