oVirt Overview
Physical architecture
oVirt consists of the following bits:
- A stripped-down Fedora build that installs and runs off a CD, a usb key, or a ramdisk (over PXE) on a physical host. The build contains all the necessary pieces to support hosting and managing virtual machines on the host.
- A web-based management UI application for oVirt hosts, users, and vms.
- The FreeIPA ldap/kerberos identity, policy, and audit application.
Logical architecture
The bits above connect in the following ways:
- The FreeIPA application handles kerberos administration, authentication, and authorization for the entire app.
- An oVirt host image is provided with the application. On boot (via cdrom, flash drive, or PXE), the host image loads its keytab and kerberos configuration from the oVirt management application and announces itself.
- The oVirt management application authenticates with FreeIPA and can then communicate with the libvirtd running on each oVirt host via an encrypted SASL connection using the libvirt SASL infrastructure.
- An iSCSI target, running on any machine reachable from the oVirt host, provides disk storage for oVirt guests. The oVirt host will automatically make the storage targets on the iSCSI server it is configured for available for oVirt guest installs.
采用libvirt进行管理，带iscsi存储，web ui 和 ldap等，不知道性能怎样，研究好libvirt后研究一下这个。