安装 elasticsearch 遇到 ERROR: Failed to determine the health of the cluster 问题解决

通常安装好 elasticsearch 之后，需要验证安装是否正常，都会在浏览器访问 http://安装的IP地址:9200/ 地址，此时，直接访问都会连接不上，需要修改elasticsearch.yml文件

# Enable security features
xpack.security.enabled: false

重启 elasticsearch 一般都能正常访问该地址。继续安装kibana，安装完成后登录kibana需要输入注册的令牌，执行以下命令生成令牌报错：

root@localhost:~/docker/elasticsearch/config# docker exec -it elastic /usr/share/elasticsearch/bin/elasticsearch-create-enrollment-token -s kibana
ERROR: Failed to determine the health of the cluster. 

百度了两小时，结果依然没有解决，最后修改了 elasticsearch.yml文件,将xpack.security.enabled改成true

# Enable security features
xpack.security.enabled: true

再重新执行生成令牌的命令，问题解决

root@localhost:~/docker/elasticsearch/config# docker exec -it elastic /usr/share/elasticsearch/bin/elasticsearch-create-enrollment-token -s kibana
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