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centos搭建elastic集群

article 2025/3/4 2:40:05

1、环境可以在同一台集群上搭建elastic，也可以在三台机器上搭建，这次演示的是在同一台机器搭建机器。

2、下载elastic ：https://www.elastic.co/cn/downloads/past-releases#elasticsearch

2、

tar -zxvf elasticsearch-xxx-版本

cd elasticsearch-8.10.3
# 创建data目录（data目录后来用来设置保存数据路径，如果要保存在其他路径，
# 需要创建该目录保证该目录存在，不然会启动报错）
mkdir data
# 创建目录好后进入config
cd config
# 编辑jvm.options设置合理参数，参数如下图
vim jvm.options

#安装服务器内存来设置即可
-Xms4g
-Xmx4g

[root@xxx data]# cat elasticsearch-node1/config/elasticsearch.yml
cluster.name: es-cluster
node.name: node-1
path.data: /data/elasticsearch-node1/data
path.logs: /data/elasticsearch-node1/logs
network.host: 0.0.0.0
http.port: 9201
discovery.seed_hosts: ["10.1.34.8:9301", "10.1.34.8:9302","10.1.34.8:9302"]
cluster.initial_master_nodes: ["node-1", "node-2","node-3"]
xpack.security.enabled: false
xpack.security.enrollment.enabled: false
xpack.security.http.ssl:
enabled: true
keystore.path: /data/elasticsearch-node1/config/certs/http.p12
truststore.path: /data/elasticsearch-node1/config/certs/http.p12
xpack.security.transport.ssl:
enabled: true
verification_mode: certificate
keystore.path: /data/elasticsearch-node1/config/certs/elastic-certificates.p12
truststore.path: /data/elasticsearch-node1/config/certs/elastic-certificates.p12

http.host: [_local_, _site_]
ingest.geoip.downloader.enabled: false
xpack.security.http.ssl.client_authentication: none

# 编辑
vim /etc/security/limits.conf
# 添加以下内容
* soft nofile 65536
* hard nofile 131072
* soft nproc 65536
* hard nproc 65536

# 编辑
vim /etc/sysctl.conf
# 添加以下内容
vm.max_map_count = 6553600

4、新增用户

useradd es
groupadd es

chown -R es:es elasticsearch-node1 elasticsearch-node2 elasticsearch-node3

#----------------------
#切换用户
su es
# 签发ca证书 直接敲回车 不需要输入密码
bin/elasticsearch-certutil ca
# 用ca证书签发节点证书 敲三次回车
bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12
# 将生成的证书文件移动到config/certs目录中
 mv elastic-certificates.p12 config/certs
#----------------------

# 签发Https证书
bin/elasticsearch-certutil http

#----------------------
关键环节如下：

Generate  a  CRS? [y/n]n  （是否发送认证证书请求）

Use  an existing CA? [y/n]y (是否使用已存在的CA证书)

CA  Path: certs/elastic-stack-ca.p12 (CA证书路径)

Password  for elastic-stack-ca.p12:  (输入CA证书密码、上面生成CA证书未设置密码、直接回车)

For  how long should  your certificate be valid: [5y] 20y (输入证书使用年限)

Generate a  certificate per node: [y/n] n(是否每个节点都 生成证书)

Enter all the hostnames that you need,one per line. （输入主机名称、回车）

when you are done,press <enter> once more to move on to the next step

es01(可以不填写，安装具体集群主机名填写，不填写的话直接回车)

es02

es03

Is this correct [y/n] n(输入的主机名称是否正确)

Enter all the ip address that you need,one per line. （输入节点ip地址、回车）

when you are done,press <enter> once more to move on to the next step

192.168.206.101(可以不填写，安装具体集群ip填写，不填写的话直接回车)

192.168.206.102

192.168.206.103

Is this correct [y/n] n(输入的ip地址是否正确)

DO you wish to change any of these options [y/n] n (是否修改证书配置)

Provide a password for the "http.p12" file:[<enter> for none] (输入密码、没配置密码、直接回车) 

What filename should be used for the output zip files?[/opt/module/elasticsearch-8.1.0/elasticsearch-ssl-http.zip] (是否自定义名称、直接回车)

unzip elasticsearch-ssl-http.zip
# 证书文件移动到指定目录下
mv elasticsearch/http.p12 kibana/elasticsearch-ca.pem config/certs

##参考以下

vim conf/elasticsearch.yml

# ES集群配置
cluster.name: cluster-es
node.name: es-node-1
#设置数据
path.data: /data/elasticsearch-8.10.3/data/
path.logs:/data/elasticsearch-8.10.3/logs/
# 网络访问节点名称(需要在/etc/hosts里设置解析)
network.host: es01
# Rest访问端口9200 ES集群内部端口为9300
http.port: 9200
# 初始节点
discovery.seed_hosts: ["es01"]
# 安全认证
xpack.security.enabled: true
xpack.security.enrollment.enabled: true
xpack.security.http.ssl:
enabled: true
keystore.path: /data/elasticsearch-8.10.3/config/certs/http.p12
truststore.path:/data/elasticsearch-8.10.3/config/certs/http.p12
xpack.security.transport.ssl:
enabled: true
verification_mode: certificate
keystore.path: /data/elasticsearch-8.10.3/config/certs/elastic-certificates.p12
truststore.path:/data/elasticsearch-8.10.3/config/certs/elastic-certificates.p12
# 集群初始化的主节点
cluster.initial_master_nodes: ["es-node-1"]
http.host: [_local_, _site_]
ingest.geoip.downloader.enabled: false
xpack.security.http.ssl.client_authentication: none