CentOS7安装MySQL
安装过程:
https://www.cnblogs.com/bigbrotherer/p/7241845.html
修改腾讯安全组：
https://cloud.tencent.com/document/product/213/2502#.E4.B8.BA.E4.BD.95.E8.A6.81.E5.BC.80.E5.90.AF.E7.AB.AF.E5.8F.A3.EF.BC.9F.E5.A6.82.E4.BD.95.E5.BC.80.E5.90.AF.E6.9F.90.E4.B8.AA.E7.AB.AF.E5.8F.A3.EF.BC.9F
修改mysql访问：
https://blog.csdn.net/qivan/article/details/79752574
