elasticsearch8怎么配集群

本文时间用的elasticsearch8的最新版本是elasticsearch-8.3.2,8版本比7版多了验证，配置上有几点较疑惑的地方。

第一步

配第一个节点，还算正常。先解压。

1.执行bin/elasticsearch.bat，启动。启动后会出现以下画面，粘出来到记事本。

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-> Elasticsearch security features have been automatically configured!
-> Authentication is enabled and cluster connections are encrypted.

->  Password for the elastic user (reset with `bin/elasticsearch-reset-password -u elastic`):
  o_gzcANYbJpKYCm0ypCK

->  HTTP CA certificate SHA-256 fingerprint:
  ab9e1e9809b37676d91128add385fb14ad25ba603236cd0302927cac020cb220

->  Configure Kibana to use this cluster:
* Run Kibana and click the configuration link in the terminal when Kibana starts.
* Copy the following enrollment token and paste it into Kibana in your browser (valid for the next 30 minutes):
  eyJ2ZXIiOiI4LjMuMiIsImFkciI6WyIxOTIuMTY4LjMwLjEyMDo5MjAwIl0sImZnciI6ImFiOWUxZTk4MDliMzc2NzZkOTExMjhhZGQzODVmYjE0YWQyNWJhNjAzMjM2Y2QwMzAyOTI3Y2FjMDIwY2IyMjAiLCJrZXkiOiJoQ19WSklJQmhBS1ZMWHhJMWxWcTpPMU5QWHpNMlJrYUMzUlFGSS1WbDFRIn0=

->  Configure other nodes to join this cluster:
* On this node:
  - Create an enrollment token with `bin/elasticsearch-create-enrollment-token -s node`.
  - Uncomment the transport.host setting at the end of config/elasticsearch.yml.
  - Restart Elasticsearch.
* On other nodes:
  - Start Elasticsearch with `bin/elasticsearch --enrollment-token <token>`, using the enrollment token that you generated.
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2.修改配置config/elasticsearch.yml

先注释掉原来的discovery.seed_hosts,再添加以下配置(192.168.30.120为本机ip)

cluster.name: mac-es
bootstrap.memory_lock: false
network.host: 192.168.30.120
discovery.seed_hosts: ["192.168.30.147:9300", "192.168.30.120:9300"]
cluster.initial_master_nodes: ["node-0", "node-1"]
http.port: 9200
transport.port: 9300
node.name: node-1

3.再次用bin/elasticsearch.bat启动。

4.执行以下命令生成token,供后面添加节点使用

bin/elasticsearch-create-enrollment-token -s node

关于kibana

其实第1步后就可以在本机启kibana.bat了，这时再启也行，需要用上第一步生成的key.

第二步

配置第二个节点

1.解压，不要改配置 执行

./elasticsearch --enrollment-token 主节点第4步生成的node值

3.修改../config/elasticsearch.yml ，
先注释掉原来的discovery.seed_hosts,再添加以下配置(192.168.30.147为本机ip)

node.name: node-0
network.host: 192.168.30.147
discovery.seed_hosts: ["192.168.30.147:9300", "192.168.30.120:9300"]
cluster.initial_master_nodes: ["node-0", "node-1"]
cluster.name: mac-es

./elasticsearch

最后，验证结果
在第一个节点上启动的kibana里(Dev Tools)执行

GET /_cat/nodes