报错1：
查看日志/var/log/redis/redis.log
843:M 19 Feb 17:26:29.097 * 1 changes in 900 seconds. Saving…
843:M 19 Feb 17:26:29.097 * Background saving started by pid 24809
24809:C 19 Feb 17:26:29.098 # Failed opening the RDB file nginx (in server root dir /et
