部署etcd错误总结
1、conflicting environment variable "ETCD_NAME" is shadowed by corresponding command-line flag (either unset environment variable or disable flag)
原因：ETCD3.4版本会自动读取环境变量的参数，所以EnvironmentFile文件中有的参数，不需要再次在ExecStart启动参数中添加，二选一，如同时配置，会触发以下类似报错
etcd: conflicting environment variable "ETCD_NAME" is shadowed by corresponding command-line flag (either unset environment variable or disable flag)
解决：剔除ExecStart中和配置文件重复的内容即可
2、cannot access data directory: directory "/application/kubernetes/data/","drwxr-xr-x" exist without desired file permission "-rwx------".
解决：将权限设置为700即可
3、Failed at step CHDIR spawning /usr/bin/etcd: No such file or directory
原因：etcd.service服务配置文件中设置的工作目录WorkingDirectory=/var/lib/etcd/必须存在，否则会报以上错误