KVM and Centos 6.3 setup checklist for CloudStack 3 and 4

Here is a short checklist to make CloudStack 3/4 work with KVM on CentOS 6.3:

1. check hostname is okay

2. disable selinux (or set it in permissive mode)

3. remove qemu-kvm if installed

4. add EPEL repository

5. adjust /etc/cgconfig.conf file by adding:

group virt {
    cpu

{         cpu.shares = 9216;         }
}

6. update centos

7. make sure primary/secondary storages could be mounted

8. reboot

9. install cloudstack agent

10. configure bridge devices

11. connect host from the management server