网上找了很久都找不到centos 7 的163源，大多只有6的配置。写了一个7能用的。注意下版本，换成自己的版本吧

1. [base]  
2. name=CentOS-$releasever - Base - 163.com  
3. #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os  
4. baseurl=http://mirrors.163.com/centos/7.1.1503/updates/x86_64  
5. gpgcheck=0  
6. gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7  
7.   
8. #released updates  
9. [updates]  
10. name=CentOS-$releasever - Updates - 163.com  
11. #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates  
12. baseurl=http://mirrors.163.com/centos/7.1.1503/updates/x86_64  
13. gpgcheck=0  
14. gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7  
15.   
16. #packages used/produced in the build but not released  
17. [addons]  
18. name=CentOS-$releasever - Addons - 163.com  
19. #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons  
20. baseurl=http://mirrors.163.com/centos/7.1.1503/updates/x86_64  
21. gpgcheck=0  
22. gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7  
23.   
24. #additional packages that may be useful  
25. [extras]  
26. name=CentOS-$releasever - Extras - 163.com  
27. #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras  
28. baseurl=http://mirrors.163.com/centos/7.1.1503/updates/x86_64  
29. gpgcheck=0  
30. gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7  
31.   
32. #additional packages that extend functionality of existing packages  
33. [centosplus]  
34. name=CentOS-$releasever - Plus - 163.com  
35. #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus  
36. baseurl=http://mirrors.163.com/centos/7.1.1503/updates/x86_64  
37. gpgcheck=0  
38. enabled=0  
39. gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7  
40.   
41. #contrib - packages by Centos Users  
42. [contrib]  
43. name=CentOS-$releasever - Contrib - 163.com  
44. #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib  
45. baseurl=http://mirrors.163.com/centos/7.1.1503/updates/x86_64  
46. gpgcheck=0  
47. enabled=0  
48. gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7  

记得备份下原文件。