地址：https://blog.csdn.net/wd2014610/article/details/89532638
一、外网访问问题
默认情况下，是不支持外网访问，如果你的Elasticsearch安装在其他机器上，你从外网去访问的时候，访问不到，不通。
那么需要修改配置。
修改：elasticsearch.yml文件
添加
network.host: 0.0.0.0
二、会报错
ERROR: [2] bootstrap checks failed
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
三、解决方案
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
使用sudo用户修改文件：sudo vim /etc/sysctl.conf
添加一行配置：
vm.max_map_count=655360
查看是否生效：
sudo sysctl -p
2.针对问题2
[2]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
放开：
cluster.initial_master_nodes: ["node-1", "node-2"]
启动访问就可以了
