I am new on centos, I was in Ubuntu and my friend "yograterol convinced me to go over to Fedora was the best.  

Change many things, the problem is that mysql does not start in docker, in my local fedora was the same, but in Docker did not work, no commands are: 

# mysql 

ERROR 2002 (HY000): Can not connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) 

Local fix it as follows: 

$ sudo setenforce 0 

$ sudo service mysqld start 

But in Docker, out the following: 

# setenforce 0 

bash: setenforce: command not found 

# Service mysqld start 

bash: service: command not found 

It happens in the Docker: Centos and Fedora. 

I think it's because they are minimum operating system images.