目录

• 0.环境系统
• 1.安装es集群
• 2.配置es集群
• • 2.1.修改es配置文件
  • 2.2.修改JVM配置
• 3.系统配置
• 4.启动es集群

0.环境系统

1.安装es集群

• 下载及安装

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.17.6-x86_64.rpm
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.17.6-x86_64.rpm.sha512
yum install perl-Digest-SHA -y
shasum -a 512 -c elasticsearch-7.17.6-x86_64.rpm.sha512 
rpm --install elasticsearch-7.17.6-x86_64.rpm

• 设置为系统启动时自动启动

systemctl daemon-reload
systemctl enable elasticsearch.service

• 服务启动与关闭（可以等修改完一些配置后再启动）

systemctl start elasticsearch.service
systemctl stop elasticsearch.service

• {如果你使用了密码保护es密钥库，则需要使用本地文件和系统环境变量提供密钥库密码}

mkdir /path/to -p
echo "espasswd" > /path/to/my_pwd_file.tmp
chmod 600 /path/to/my_pwd_file.tmp
chown elasticsearch.elasticsearch /path/to/my_pwd_file.tmp
systemctl set-environment ES_KEYSTORE_PASSPHRASE_FILE=/path/to/my_pwd_file.tmp

2.配置es集群

es服务有三个比较重要的文件：

es配置文件：elasticsearch.yml
JVM配置：jvm.options
日志记录配置：log4j2.properties

2.1.修改es配置文件

• 设置集群名称

cluster.name: my-es

• 设置节点名称(使用各自主机名)

node.name: es-node01

• 数据和日志存放路径（注意生产中不要使用默认路径，数据容易满）

path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch

• 网络设置

network.host: 0.0.0.0

• 集群设置（设置集群有多少节点）

discovery.seed_hosts: ["192.168.0.250", "192.168.0.251", "192.168.0.252"]

• 参与master选举设置

cluster.initial_master_nodes: ["192.168.0.250", "192.168.0.251", "192.168.0.252"]

2.2.修改JVM配置

• 限制内存大小（可以使用内存的一半，最大不超过32）

-Xms2g
-Xmx2g

对了，提一句，安装es会默认携带openjdk，如果使用自定义jdk请更改指向路径。

3.系统配置

• 设置文件句柄数（因为我使用阿里云主机，默认是配置好的）

vim /etc/security/limits.conf
root soft nofile 65535
root hard nofile 65535
* soft nofile 65535
* hard nofile 65535

• 禁用交换内存（阿里云同样没有这项）

sawpoff -a
# vim /etc/fstab 找到swap那行进行注释

• 设置虚拟内存

sysctl -w vm.max_map_count=262144

vim /etc/sysctl.conf
vm.max_map_count = 262144
sysctl -p

• 设置线程数

vim /etc/security/limits.conf
* soft nproc 4096
* hard nproc 4096

4.启动es集群

配置目前就先配置这么多了，还有很多配置可以参考官网

• 启动es集群

systemctl start elasticsearch.service 
netstat -utpln
tcp6       0      0 :::9200                 :::*                    LISTEN      12535/java          
tcp6       0      0 :::9300                 :::*                    LISTEN      12535/java

• 验证集群是否运行成功

es-node01：

curl 127.0.0.1:9200
{
  "name" : "es-node01",
  "cluster_name" : "my-es",
  "cluster_uuid" : "7_WxMzV4TjKE5xnyowvG3A",
  "version" : {
    "number" : "7.17.6",
    "build_flavor" : "default",
    "build_type" : "rpm",
    "build_hash" : "f65e9d338dc1d07b642e14a27f338990148ee5b6",
    "build_date" : "2022-08-23T11:08:48.893373482Z",
    "build_snapshot" : false,
    "lucene_version" : "8.11.1",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

es-node02：

curl 127.0.0.1:9200
{
  "name" : "es-node02",
  "cluster_name" : "my-es",
  "cluster_uuid" : "7_WxMzV4TjKE5xnyowvG3A",
  "version" : {
    "number" : "7.17.6",
    "build_flavor" : "default",
    "build_type" : "rpm",
    "build_hash" : "f65e9d338dc1d07b642e14a27f338990148ee5b6",
    "build_date" : "2022-08-23T11:08:48.893373482Z",
    "build_snapshot" : false,
    "lucene_version" : "8.11.1",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

es-node03：

curl 127.0.0.1:9200
{
  "name" : "es-node03",
  "cluster_name" : "my-es",
  "cluster_uuid" : "7_WxMzV4TjKE5xnyowvG3A",
  "version" : {
    "number" : "7.17.6",
    "build_flavor" : "default",
    "build_type" : "rpm",
    "build_hash" : "f65e9d338dc1d07b642e14a27f338990148ee5b6",
    "build_date" : "2022-08-23T11:08:48.893373482Z",
    "build_snapshot" : false,
    "lucene_version" : "8.11.1",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

• 查看哪个节点为主节点：*为主节点

curl http://192.168.0.250:9200/_cat/master
LnrA5H20Q8qtUeoxBAMrHQ 192.168.0.250 192.168.0.250 es-node01

curl http://192.168.0.250:9200/_cat/nodes
192.168.0.252 16 97 1 0.11 0.04 0.05 cdfhilmrstw - es-node03
192.168.0.250 18 96 2 0.03 0.05 0.09 cdfhilmrstw * es-node01
192.168.0.251 14 97 2 0.13 0.06 0.09 cdfhilmrstw - es-node02

因为是使用阿里云的内网部署的集群，所以在浏览器上看不到，可以部署kiana作为集群的前端页面来查看。