https://blog.csdn.net/weixin_43210350/article/details/109775605
错误信息
当为es集群设置完一次密码之后，再次执行相同的命令
./elasticsearch-setup-passwords interactive
报错：
Failed to authenticate user 'elastic' against http://172.16.xxx.xxx:9200/_security/_authenticate?pretty
Possible causes include:
* The password for the 'elastic' user has already been changed on this cluster
* Your elasticsearch node is running against a different keystore
This tool used the keystore at /usr/local/elasticsearch-7.2.0/config/elasticsearch.keystore
ERROR: Failed to verify bootstrap password
解决办法：
删除 .security-7 索引，然后重新执行上面命令即可，不用重启es集群
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原文链接：https://blog.csdn.net/weixin_43210350/article/details/109775605
没找到 .security-7 索引，又搜了一下，停止es后删除data文件夹下的文件后再启动es，运行交互密码命令即可