1.下载安装包

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.8.3.tar.gz

下载后,解压.

我解压的地址是:/usr/local/elasticsearch6.8.3

2.创建用户

• es不能以root用户运行,所以需要创建用户

adduser elastic #创建elastic用户

• 在es的安装目录下创建esdata

cd /usr/local/elasticsearch6.8.3
mkdir -p  esdata/data
mkdir -p  esdata/log

• 赋予elastic用户权限

chown -R elastic elasticsearch6.8.3

3.配置es节点

• 修改配置文件

vi /usr/local/elasticsearch6.8.3/config/elasticsearch.yml

• 具体配置如下

# ======================== Elasticsearch Configuration =========================
#
# NOTE: Elasticsearch comes with reasonable defaults for most settings.
#       Before you set out to tweak and tune the configuration, make sure you
#       understand what are you trying to accomplish and the consequences.
#
# The primary way of configuring a node is via this file. This template lists
# the most important settings you may want to configure for a production cluster.
#
# Please consult the documentation for further information on configuration options:
# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
#
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
#
cluster.name: htkj-es #集群的名称
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
node.name: htkj101 #节点的名称
#
# Add custom attributes to the node:
#
#node.attr.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
path.data: /usr/local/elasticsearch6.8.3/esdata/data #data的路径
#
# Path to log files:
#
path.logs: /usr/local/elasticsearch6.8.3/esdata/log  #log的路径
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
bootstrap.memory_lock: true #ES在内存交换时性能很差,设置这个可以防止内存交换
#
# Make sure that the heap size is set to about half the memory available
# on the system and that the owner of the process is allowed to use this
# limit.
#
# Elasticsearch performs poorly when the system is swapping the memory.
#
# ---------------------------------- Network -----------------------------------
#
# Set the bind address to a specific IP (IPv4 or IPv6):
#
network.host: htkj101 #节点的ip地址
#
# Set a custom port for HTTP:
#
http.port: 9200   #端口号
http.cors.enabled: true #head插件发现节点
http.cors.allow-origin: "*" #head插件发现节点
#
# For more information, consult the network module documentation.
#
# --------------------------------- Discovery ----------------------------------
#
# Pass an initial list of hosts to perform discovery when new node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
discovery.zen.ping.unicast.hosts: ["htkj102", "htkj103"]#集群的其他节点Ip,只有一个节点写本机ip
#
# Prevent the "split brain" by configuring the majority of nodes (total number of master-eligible nodes / 2 + 1):
#
discovery.zen.minimum_master_nodes: 2 #防止脑裂,配置的数量为集群的节点数量/2+1 我配的是3节点,所以为3/2+1=2
#
# For more information, consult the zen discovery module documentation.
#
# ---------------------------------- Gateway -----------------------------------
#
# Block initial recovery after a full cluster restart until N nodes are started:
#
gateway.recover_after_nodes: 3  #在集群完全重新启动后阻止初始恢复，直到启动3个节点
#
# For more information, consult the gateway module documentation.
#
# ---------------------------------- Various -----------------------------------
#
# Require explicit names when deleting indices:
#
action.destructive_requires_name: true #删除索引时需要明确名称

4.配置系统参数

• 修改 /etc/security/limits.conf 

vi /etc/security/limits.conf

#修改下面几项，没有的就添加
* soft nofile 65536
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096

• 修改 /etc/sysctl.conf,添加下面一行，然后重启机器

vm.max_map_count=262144

5.启动

• 重启机器后，启动es的节点

su elastic #es启动默认不使用root
cd /usr/local/elasticsearch6.8.3/bin
./elasticsearch -d

• 浏览器访问ip:port,出现如下信息表示安装成功

{
"name" : "htkj101",
"cluster_name" : "htkj-es",
"cluster_uuid" : "_na_",
"version" : {
"number" : "6.8.3",
"build_flavor" : "default",
"build_type" : "tar",
"build_hash" : "0c48c0e",
"build_date" : "2019-08-29T19:05:24.312154Z",
"build_snapshot" : false,
"lucene_version" : "7.7.0",
"minimum_wire_compatibility_version" : "5.6.0",
"minimum_index_compatibility_version" : "5.0.0"
},
"tagline" : "You Know, for Search"
}

6.部署head插件

• 下载head插件

#head插件只需要部署在一个节点上即可 这里选择htkj101这个节点
wget https://github.com/mobz/elasticsearch-head/archive/master.zip
unzip elasticsearch-head-master.zip

• 安装环境

cd /usr/local/elasticsearch-head-master
#以下操作均在elasticsearch-head-master目录下进行
su root #在root角色下
curl -sL https://rpm.nodesource.com/setup_8.x | bash -
sudo yum install gcc-c++ make
curl -sL https://dl.yarnpkg.com/rpm/yarn.repo | sudo tee /etc/yum.repos.d/yarn.repo
yum -y install yarn nodejs git
npm install -g grunt-cli

• 安装grunt

npm install grunt --save-dev
npm install

• 修改Gruntfile.js

vi /usr/local/elasticsearch-head-master/Gruntfile.js
#修改下面这一段：
connect: {
server: {
options: {
port: 9100,
hostname: '*', #添加hostname这一行
base: '.',
keepalive: true
}
}
}

• 启动head服务

#在elasticsearch-head-master目录下启动服务
cd /usr/local/elasticsearch-head-master
grunt server &

• 出现如下信息

Running "connect:server" (connect) task
Waiting forever...
Started connect web server on http://localhost:9100

• 打开浏览器,访问http://ip:9100(ip为安装head插件的节点ip)

• 安装成功