环境

• ubuntu 20.04
• elasticsearch 8.0
• 服务器IP：192.168.1.63
• 目录elastic-master是主节点，目录elastic-node2 是从节点
• 系统需要新建一个用户来专门启动es,因为es不能使用root用户启动
• 一台服务器上装多个es来配置集群（多台也是一样的配置）

elasticsearch下载地址

• 下载地址

不设置用户名密码和https的启动步骤

• 解压刚刚下载的es，解压后我就暂时放在elastic-master吧

  tar -zxvf xxxx
  

• 如果不配置集群，那直接就可以启动使用了

  #前台启动
  elastic-master/bin/elasticsearch
  #后台启动
  elastic-master/bin/elasticsearch -d
  

• 进入到主节点elastic-master/config,找到elasticsearch.yml文件，这个文件就是配置文件,将文件改为：

network.host: 0.0.0.0

http.port: 9200
#内部各节点通信端口
transport.port: 9301


#
#集群名，各个节点集群名保证一样，但是节点名不能一样
cluster.name: es-cluster
#节点名
node.name: node-1
#模式启动的时候推选哪个节点来做主几点，可以是IP，也可以是节点名
#cluster.initial_master_nodes: ["node-1","node-2"]
cluster.initial_master_nodes: ["192.168.1.63:9301"]

#discovery.seed_hosts: ["192.168.1.63:9301","192.168.1.63:9302","192.168.1.63:9303","192.168.1.59:9304"]
#节点发现，就是集群中的各个节点
discovery.seed_hosts: ["192.168.1.63:9301","192.168.1.63:9302"]

#这一块主要是设置，是否允许跨域，是否启用https安全访问等。
#不设置密码
xpack.security.enabled: false
xpack.security.transport.ssl.enabled: false
xpack.security.http.ssl.enabled: false
http.cors.enabled: true
http.cors.allow-origin: "*"

• 重新解压一份es的源码出来作为从节点，就是刚刚下载的压缩包，目录是elastic-node2
• 进入到从节点elastic-node2/config,找到elasticsearch.yml文件，这个文件就是配置文件,将文件改为,其实这里不同地方就是节点名和取消设置选主节点的配置：cluster.initial_master_nodes和node.name,端口是因为我同一台服务器，所以需要设置成不同的

network.host: 0.0.0.0

http.port: 9201
transport.port: 9302

cluster.name: es-cluster
node.name: node-2
#cluster.initial_master_nodes: ["192.168.1.63:9302"]

discovery.seed_hosts: ["192.168.1.63:9301","192.168.1.63:9301","192.168.1.63:9302"]


#不设置密码
xpack.security.enabled: false
xpack.security.transport.ssl.enabled: false
xpack.security.http.ssl.enabled: false
http.cors.enabled: true
http.cors.allow-origin: "*"

• 现在启动两个节点，然后浏览器访问http://192.168.1.63:9200或者http://192.168.1.63:9201就可以看到是否成功了

  #启动主节点
  elastic-master/bin/elasticsearch
  #启动从节点
  elastic-node2/bin/elasticsearch
  

• 如果无法启动或者无法连接到集群，尝试删除掉elastic-master/data目录和elastic-node2/data。特别注意，这个文件删除了，那所有的数据都没有了，慎重。。。。一般来说，主节点如果有数据，不要删除主节点的，先删除从节点的试试

设置用户名密码和https的启动步骤

• 一般来说，为了安全会设置用户名和https访问

• 通过bin/elasticsearch-certutil ca生成elastic-stack-ca.p12

  elastic-master/bin/elasticsearch-certutil ca
  

  1.出现提示时，接受默认文件名，即 elastic-stack-ca.p12。此文件包含 CA 的公共证书和用于为每个节点签署证书的私钥。
  2…输入 CA 的密码。如果不部署到生产环境，您可以选择将密码留空,这里我随便个密码123123，后面要用到。

• 生成elastic-stack-ca.p12

  elastic-master/bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12
  

  1.会弹出三次提示，分别是输入密码，输出文件，输入密码，第一次密码是输入上一步设置的密码，也是123123，输出文件可以直接回车，默认就行。最后一次叫输入密码，什么都不要输入，直接回车就行，否则启动的时候会报错输入刚刚的密码，最后生成elastic-stack-ca.p12密码不要写，直接回车 不然会报错xpack Caused by: java.io.IOException: keystore password was incorrect
  2.生成的证书文件在elastic-master目录下，需要给文件权限和移动到elastic-master/config目录下

  chmod 777 elastic-master/elastic-stack-ca.p12
  chmod 777 elastic-master/elastic-certificates.p12
  mv elastic-master/elastic-stack-ca.p12 elastic-master/config
  mv elastic-master/elastic-certificates.p12 elastic-master/config
  

• 创建keystore

  bin/elasticsearch-keystore create
  

• 更改主节点配置文件elasticsearch.yml

network.host: 0.0.0.0

http.port: 9200
transport.port: 9301


cluster.name: es-cluster
node.name: node-1
cluster.initial_master_nodes: ["192.168.1.63:9301"]
cluster.auto_shrink_voting_configuration: false
#discovery.seed_hosts: ["192.168.1.63:9301","192.168.1.63:9302","192.168.1.63:9303","192.168.1.59:9304"]
discovery.seed_hosts: ["192.168.1.63:9301","192.168.1.63:9302","192.168.1.63:9303","192.168.1.59:9304"]





xpack.license.self_generated.type: basic
http.cors.enabled: true
http.cors.allow-origin: "*"
http.cors.allow-headers: Authorization,X-Requested-With,Content-Length,Content-Type
#开启密码认证
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true

xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.keystore.path: /home/xway-rd/elastic-master/config/elastic-certificates.p12

#配置https的，如果启动不了，可以先注释下面的配置，启动成功后，设置完密码后再打开这些配置重新启动
xpack.security.transport.ssl.truststore.path: /home/xway-rd/elastic-master/config/elastic-certificates.p12
xpack.security.http.ssl.enabled: true
xpack.security.http.ssl.keystore.path: /home/xway-rd/elastic-master/config/elastic-certificates.p12
xpack.security.http.ssl.truststore.path: /home/xway-rd/elastic-master/config/elastic-certificates.p12

• 先将刚刚生成的证书文件发送复制到从节点的config目录下，elastic-node2/config目录下
• 再更改从节点配置文件elasticsearch.yml

network.host: 0.0.0.0

http.port: 9201
transport.port: 9302


cluster.name: es-cluster
node.name: node-2
#cluster.initial_master_nodes: ["192.168.1.63:9302"]

discovery.seed_hosts: ["192.168.1.63:9301","192.168.1.63:9302","192.168.1.63:9303"]



#设置密码
xpack.license.self_generated.type: basic
http.cors.enabled: true
http.cors.allow-origin: "*"
http.cors.allow-headers: Authorization,X-Requested-With,Content-Length,Content-Type
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true

xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.keystore.path: /home/xway-rd/elastic-node2/config/elastic-certificates.p12



#配置https的，如果启动不了，可以先注释下面的配置，启动成功后，设置完密码后再打开这些配置重新启动
xpack.security.transport.ssl.truststore.path: /home/xway-rd/elastic-node2/config/elastic-certificates.p12
xpack.security.http.ssl.enabled: true
xpack.security.http.ssl.keystore.path: /home/xway-rd/elastic-node2/config/elastic-certificates.p12
xpack.security.http.ssl.truststore.path: /home/xway-rd/elastic-node2/config/elastic-certificates.p12

• 启动主节点和从节点，这个时候可能会报错，提示的大概是证书或者密码错误这些，如果没报错就算完成了，直接访问https://192.168.1.63:9200，如果提示证书不安全，忽略就行，然后就会提示叫输入账号密码。

• 启动成功的情况，启动成功了但是还没有设置密码，所以登录不进去，先设置密码。会要求设置很多用户的密码，耐心点，我们记住一个elastic用户的密码就行

  elastic-master/bin/elasticsearch-setup-passwords interactive
  

• 如果启动失败，那可能需要按下面操作一波
  1.先更改主节点的配置文件elasticsearch.yml

network.host: 0.0.0.0

http.port: 9200
transport.port: 9301


cluster.name: es-cluster
node.name: node-1
cluster.initial_master_nodes: ["192.168.1.63:9301"]
cluster.auto_shrink_voting_configuration: false
#discovery.seed_hosts: ["192.168.1.63:9301","192.168.1.63:9302","192.168.1.63:9303","192.168.1.59:9304"]
discovery.seed_hosts: ["192.168.1.63:9301","192.168.1.63:9302"]




#设置密码
xpack.license.self_generated.type: basic
http.cors.enabled: true
http.cors.allow-origin: "*"
http.cors.allow-headers: Authorization,X-Requested-With,Content-Length,Content-Type
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true


xpack.security.transport.ssl.keystore.path: /home/xway-rd/elasticsearch-8.0.0/config/elastic-certificates.p12


xpack.security.transport.ssl.verification_mode: certificate

2.更改从节点配置elasticsearch.yml

network.host: 0.0.0.0

http.port: 9201
transport.port: 9302


cluster.name: es-cluster
node.name: node-2
#cluster.initial_master_nodes: ["192.168.1.63:9302"]

discovery.seed_hosts: ["192.168.1.63:9301","192.168.1.63:9302","192.168.1.63:9303"]



#设置密码
xpack.license.self_generated.type: basic
http.cors.enabled: true
http.cors.allow-origin: "*"
http.cors.allow-headers: Authorization,X-Requested-With,Content-Length,Content-Type
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true

xpack.security.transport.ssl.keystore.path: /home/xway-rd/elastic-node2/config/elastic-certificates.p12
xpack.security.transport.ssl.verification_mode: certificate

3.在重新启动，启动成功后，再设置密码，再用之前的配置文件启动https。

说明

• 所有节点共用同一份证书，用户密码也是共有的。因为我是在同一台服务部署多个es，我不知道在多台服务器上部署会不会出现用户名密码不对。如果有，就在各个子节点都执行设置密码的命令

补充

如果后面又要加一台节点进来，安装好后就把主节点的证书复制过来就行了,改改配置文件就行了，然后登录账号密码是复用主节点的账号密码，复制的证书文件有：config/certs/elastic-certificates.p12 ,config/certs/elastic-stack-ca.p12,config/elasticsearch.keystore