Hi I think it is possible to rest Amazon rds password, I mean db password. Is it called master password. I mean RDS-PASAWORD. But any way to see current rds password. I searched internet for a long time and can't find a way to do it?
With a standard RDS, you can't. For security reasons they set it up so that, if you lose the password, the only way to recover is to either guess what it was or to reset it. If this is done properly there is no way for anybody, even if they work for AWS, to know what password you had. This is normal for such systems.
N.B See the other answer for the exception in the case of Elastic Beanstalk.