Failed to load answers from file: Failed to load answers from file ./answers.json: EOF

rancher容器网络出现问题，大面积服务启动失败。

healthcheck   

ipsec

network-services

scheduler无法启动

network-services-metadata启动报缺少./answers.json

如服务出现Timeout getting IP address

或者查看基础设施应>network-services>metadata>network-services-metadata-2日志出现：Failed to load answers from file: Failed to load answers from file ./answers.json: EOF

可能是异常关机造成的网络错误，先删除主机，再重新添加主机即可。