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• Debian wheezy, install xen hypervisor, openvswitch

  # aptitude install xen-hypervisor

  # aptitude install openvswitch-brcompat openvswitch-datapath-source

• Manually build/install openvswitch-datapath for your kernel

# m-a a-i openvswitch-datapath

Various dependencies ( openvswitch-brcompat openvswitch-common{a} openvswitch-switch{a} uuid-runtime{a} )

• Reboot

• This will install all of the opennebula packages on one server

# aptitude install opennebula-{node,sunstone,tools} opennebula

• Once installed edit /etc/one/oned.conf
  

You will need to comment out the KVM drivers, and uncomment the Xen drivers:

    IM_MAD = [
        name       = "im_xen",
        executable = "one_im_ssh",
        arguments  = "xen" ]

    VM_MAD = [
        name       = "vmm_xen",
        executable = "one_vmm_exec",
        arguments  = "xen",
        default    = "vmm_exec/vmm_exec_xen.conf",
        type       = "xen" ]

• Edit /etc/sudoers.d/opennebula-node to insure oneadmin can run ovs-vsctl
  

  # visudo -f /etc/sudoers.d/opennebula-node 

add line

  %cloud    ALL=(ALL) NOPASSWD: /usr/bin/ovs-vsctl * 

• You will need to su to oneadmin and edit the ssh authorized_keys
  

  # su - oneadmin
  # cat .ssh/id_rsa.pub > authorized_keys
  # ssh localhost

• Make sure you can login with no password.

Once logged in do the following

  ~$ onevm list
    ID USER     GROUP    NAME         STAT CPU     MEM        HOSTNAME        TIME

  ~$ exit

If you do not get the above blank list, then verify /var/log/one/oned.log and see where the issue is.

It is critical that your opennebula front end can resolve the name of your hypervisors. In this scenario we will use the /etc/hosts file to do this for us.

# vim /etc/hosts

127.0.0.1 xenhost

:wq

For clustering or high availability you can assign host to closers. For our purposes we will over look this for now.

Switch over to the oneadmin user and add your hosts.
To add a host you use the onehost create command. This command needs to know the information manager (im) driver, the virtual machine monitor (vmm) driver and the network driver that the host is using. In our case we will be adding a xen hypervisor, that is set up to use open vSwitch for its network driver.

# su - oneadmin
~$ onehost create xenhost -i im_xen -v vmm_xen -n ovswitch

Once complete you should now see your host on the onehost list, you can also use onehost show <hostid> to show the details of your host:

oneadmin@xenhost:~$ onehost list
  ID NAME         CLUSTER     RVM   TCPU   FCPU   ACPU   TMEM   FMEM   AMEM STAT
   1 xenhost     -             0      0      0    100     0K     0K     0K   on

oneadmin@xenhost:~$ onehost show xenhost
HOST 1 INFORMATION                                                              
ID                    : 1                   
NAME                  : xenhost            
CLUSTER               : -                   
STATE                 : MONITORED           
IM_MAD                : im_xen              
VM_MAD                : vmm_xen             
VN_MAD                : ovswitch            
LAST MONITORING TIME  : 1339032919          

HOST SHARES                                                                     
MAX MEM               : 16678912            
USED MEM (REAL)       : 13844480            
USED MEM (ALLOCATED)  : 0                   
MAX CPU               : 800                 
USED CPU (REAL)       : 107                 
USED CPU (ALLOCATED)  : 0                   
MAX DISK              : 0                   
USED DISK (REAL)      : 0                   
USED DISK (ALLOCATED) : 0                   
RUNNING VMS           : 0                   

MONITORING INFORMATION                                                          
ARCH="x86_64"
CPUSPEED="3100"
FREECPU="693"
FREEMEMORY="2834432"
HOSTNAME="xenhost"
HYPERVISOR="xen"
MODELNAME="AMD FX(tm)-8120 Eight-Core Processor "
NETRX="0"
NETTX="0"
TOTALCPU="800"
TOTALMEMORY="16678912"
USEDCPU="107"
USEDMEMORY="13844480"

We will mount the RAID array to datastores and use this for all storage.

http://opennebula.org/documentation:rel3.4:lvm