[elasticsearch]部署安装单节点和集群

单点安装

1. 进入安装目录：cd /usr/local
2. 获取安装包：
   1. wget http://172.29.50.31/download/ProgramPackage/elasticsearch/elasticsearch-7.6.2-linux-x86_64.tar.gz
   2. wget http://172.29.50.31/download/ProgramPackage/elasticsearch/elasticsearch-analysis-ik-7.6.2.zip
3. 解压安装包：tar -zxvf elasticsearch-7.6.2-linux-x86_64.tar.gz
4. 重命名：mv elasticsearch-7.6.2/ elasticsearch
5. 安装ik插件
   1. unzip elasticsearch-analysis-ik-7.6.2.zip
   2. 将解压文件拷贝至elasticsearch的plugins文件下：cp -r elasticsearch-analysis-ik-7.6.2 /usr/local/elasticsearch/plugins
6. 修改配置文件：cd elasticsearch/config/

进入到es安装目录下的config文件夹中，修改elasticsearch.yml 文件，配置示例如下：

cluster.name: robot-elastic
node.name: node-1
path.data: /home/data/elasticsearch
path.logs: /home/logs/elasticsearch
bootstrap.system_call_filter: false
network.host: 0.0.0.0
http.port: 9200
http.cors.enabled: true
http.cors.allow-origin: "*"
cluster.initial_master_nodes: ["node-1"]

按esc输入 :wq 保存并退出

1. 补齐目录

   1. mkdir -p /home/data/elasticsearch
   2. mkdir -p /home/logs/elasticsearch

2. 因为安全问题elasticsearch 不让用root用户直接运行，所以要创建新用户

   1. useradd dicfin
   2. passwd dicfin

3. 为用户赋权限

chown -R dicfin:dicfin /usr/local/elasticsearch
chown -R dicfin:dicfin /home/data/elasticsearch
chown -R dicfin:dicfin /home/logs/elasticsearch

1. 修改系统参数：vim /etc/security/limits.conf ，最后追加

* soft nproc 20480
* hard nproc 20480
* soft nofile 65536
* hard nofile 65536
* soft memlock unlimited
* hard memlock unlimited

• vim /etc/security/limits.d/20-nproc.conf 修改以下

*     soft  nproc   20480

• vim /etc/sysctl.conf 修改以下，若无则新增

fs.file-max = 655360
vm.max_map_count = 262144

• sysctl -p 生效

1. 切换用户启动ES (验证是否初步安装成功)
   1. cd
   2. su dicfin
   3. cd /usr/local/elasticsearch
   4. bin/elasticsearch &

集群安装

es版本：v7.12.0-x86_64

在三个节点部署es集群：（需要提前安装jdk，本文使用的版本为jdk-8u-251，即jdk1.8）

• 172.50.13.103
• 172.50.13.104
• 172.50.13.105

1. 准备

1. 获取安装包：elasticsearch-7.12.0-linux-x86_64.tar.gz
2. 解压：tar xf elasticsearch-7.12.0-linux-x86_64.tar.gz
3. 创建安装目录：mkdir -p /home/{web,data,logs}/elasticsearch
4. 转移压缩包内容：mv ./elasticsearch-7.12.0/* /home/web/elasticsearch/
5. 删除es安装包
6. 创建es用户：
   1. useradd -M elasticsearch
   2. passwd elasticsearch
7. 授权：

chown -R elasticsearch:elasticsearch /home/web/elasticsearch
chown -R elasticsearch:elasticsearch /home/data/elasticsearch
chown -R elasticsearch:elasticsearch /home/logs/elasticsearch

2. 修改系统参数

/etc/sysctl.conf

fs.file-max = 655360
vm.max_map_count = 262144

执行sysctl -p生效

/etc/security/limits.conf

* soft nproc 20480
* hard nproc 20480
* soft nofile 65536
* hard nofile 65536
* soft memlock unlimited
* hard memlock unlimited

/etc/security/limits.d/20-nproc.conf

修改内容如下：

*     soft  nproc   20480

3. 修改es配置文件

config/jvm.options

-Xms1g
-Xmx1g

以实际情况为准，一般设置为内存的一半最佳。

config/elasticsearch.yml

• 172.50.13.103

cluster.name: esbigdata
node.name: server1
node.master: true
node.data: true
path.data: /home/data/elasticsearch
path.logs: /home/logs/elasticsearch
bootstrap.memory_lock: true
bootstrap.system_call_filter: true
network.host: 0.0.0.0
http.port: 9200
transport.port: 9300
discovery.seed_hosts: ["172.50.13.103:9300","172.50.13.105:9300"]
cluster.initial_master_nodes: ["server1","server3"]

• 172.50.13.104

cluster.name: esbigdata
node.name: server2
node.master: true
node.data: true
path.data: /home/data/elasticsearch
path.logs: /home/logs/elasticsearch
bootstrap.memory_lock: true
bootstrap.system_call_filter: true
network.host: 0.0.0.0
http.port: 9200
transport.port: 9300
discovery.seed_hosts: ["172.50.13.103:9300","172.50.13.105:9300"]
cluster.initial_master_nodes: ["server1","server3"]

• 172.50.13.105

cluster.name: esbigdata
node.name: server3
node.master: true
node.data: true
path.data: /home/data/elasticsearch
path.logs: /home/logs/elasticsearch
bootstrap.memory_lock: true
bootstrap.system_call_filter: true
network.host: 0.0.0.0
http.port: 9200
transport.port: 9300
discovery.seed_hosts: ["172.50.13.103:9300","172.50.13.105:9300"]
cluster.initial_master_nodes: ["server1","server3"]

参数说明：

• cluster.name：集群名称
• node.name：节点名
• node.master：该节点是否有资格被选举为主节点，默认为true
• node.data：该节点是否存储索引数据，默认为true。如果master和data都为false，则该节点为客户端，负责将集群中的请求转发到主节点
• path.data：数据存储路径
• path.logs：日志存储路径
• bootstrap.memory_lock：锁定只使用物理内存，不使用swap虚拟内存
• bootstrap.system_call_filter：检测SecComp
• network.host：若安全起见，可以设置为本机IP
• http.port：http请求的端口，默认9200
• transport.port：集群之间通信端口
• discovery.seed_hosts，用于发现集群节点的主机IP和端口，一般是master节点
• cluster.initial_master_nodes：初始化⼀个新的集群时需要此配置来选举master

4. 启动

1. 切换用户：su elasticsearch
2. 启动：/home/web/elasticsearch/bin/elasticsearch -d
3. 验证：curl http://172.50.13.103:9300，出现以下内容则集群搭建成功。（如果cluster_uuid为 _na_，则搭建失败）

{
  "name" : "server1",
  "cluster_name" : "esbigdata",
  "cluster_uuid" : "UzHTBNaWSxiyOIJWAUP7Vg",
  "version" : {
    "number" : "7.12.0",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "78722783c38caa25a70982b5b042074cde5d3b3a",
    "build_date" : "2021-03-18T06:17:15.410153305Z",
    "build_snapshot" : false,
    "lucene_version" : "8.8.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}