From here,you'll be learn how to update Red Hat Enterprise Virtualization Manager.

  1. Checking for Red Hat Enterprise Virtualization Manager Updates

[root@rhevm ~]# engine-upgrade-check 
VERB: queue package rhevm-setup for update
VERB: package rhevm-setup queued
VERB: Building transaction
VERB: Transaction built
VERB: Transaction Summary:
VERB:     updated    - rhevm-lib-3.3.2-0.50.el6ev.noarch
VERB:     update     - rhevm-lib-3.3.3-0.52.el6ev.noarch
VERB:     updated    - rhevm-setup-3.3.2-0.50.el6ev.noarch
VERB:     update     - rhevm-setup-3.3.3-0.52.el6ev.noarch
Upgrade available

2.Updating Red Hat Enterprise Virtualization Manager

[root@rhevm ~]# yum update rhevm -y
[root@rhevm ~]# rhevm-setup 
[ INFO  ] Stage: Initializing
[ INFO  ] Stage: Environment setup
          Configuration files: ['/etc/ovirt-engine-setup.conf.d/10-packaging.conf', '/etc/ovirt-engine-setup.conf.d/20-setup-ovirt-post.conf']
          Log file: /var/log/ovirt-engine/setup/ovirt-engine-setup-20140530093354.log
          Version: otopi-1.1.3 (otopi-1.1.3-1.el6ev)
[ INFO  ] Stage: Environment packages setup
[ INFO  ] Stage: Programs detection
[ INFO  ] Stage: Environment setup
[ INFO  ] Stage: Environment customization
         
          --== PACKAGES ==--
         
[ INFO  ] Checking for product updates...
          Setup has found updates for some packages, do you wish to update them now? (Yes, No) [Yes]: 
[ INFO  ] Checking for an update for Setup...
         
          --== NETWORK CONFIGURATION ==--
         
          Setup can automatically configure the firewall on this system.
          Note: automatic configuration of the firewall may overwrite current settings.
          Do you want Setup to configure the firewall? (Yes, No) [Yes]: No
         
          --== DATABASE CONFIGURATION ==--
         
         
          --== OVIRT ENGINE CONFIGURATION ==--
         
          Skipping storing options as database already prepared
         
          --== PKI CONFIGURATION ==--
         
          PKI is already configured
         
          --== APACHE CONFIGURATION ==--
         
         
          --== SYSTEM CONFIGURATION ==--
         
         
          --== END OF CONFIGURATION ==--
         
[ INFO  ] Stage: Setup validation
[ INFO  ] Cleaning stale zombie tasks
         
          --== CONFIGURATION PREVIEW ==--
         
          Database name                      : engine
          Database secured connection        : False
          Database host                      : localhost
          Database user name                 : engine
          Database host name validation      : False
          Database port                      : 5432
          NFS setup                          : False
          Update Firewall                    : False
          Configure WebSocket Proxy          : True
          Host FQDN                          : rhevm.xzxj.edu.cn
          NFS mount point                    : /var/lib/exports/iso
          Set application as default page    : True
          Configure Apache SSL               : True
          Upgrade packages                   : True
         
          Please confirm installation settings (OK, Cancel) [OK]: 
[ INFO  ] Cleaning async tasks and compensations
[ INFO  ] Checking the DB consistency
[ INFO  ] Stage: Transaction setup
[ INFO  ] Stopping engine service
[ INFO  ] Stopping websocket-proxy service
[ INFO  ] Stage: Misc configuration
[ INFO  ] Fixing DB inconsistencies
[ INFO  ] Stage: Package installation
[ INFO  ] Yum Status: Downloading Packages
[ INFO  ] Yum Download/Verify: rhevm-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum Download/Verify: rhevm-backend-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum Download/Verify: rhevm-dbscripts-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum Download/Verify: rhevm-restapi-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum Download/Verify: rhevm-tools-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum Download/Verify: rhevm-userportal-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum Download/Verify: rhevm-webadmin-portal-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum Status: Check Package Signatures
[ INFO  ] Yum Status: Running Test Transaction
[ INFO  ] Yum Status: Running Transaction
[ INFO  ] Yum update: 1/14: rhevm-restapi-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum update: 2/14: rhevm-backend-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum update: 3/14: rhevm-userportal-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum update: 4/14: rhevm-dbscripts-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum update: 5/14: rhevm-tools-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum update: 6/14: rhevm-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum update: 7/14: rhevm-webadmin-portal-3.3.3-0.52.el6ev.noarch
[ INFO  ] Yum updated: 8/14: rhevm-backend
[ INFO  ] Yum updated: 9/14: rhevm-dbscripts
[ INFO  ] Yum updated: 10/14: rhevm-restapi
[ INFO  ] Yum updated: 11/14: rhevm-tools
[ INFO  ] Yum updated: 12/14: rhevm-userportal
[ INFO  ] Yum updated: 13/14: rhevm
[ INFO  ] Yum updated: 14/14: rhevm-webadmin-portal
[ INFO  ] Yum Verify: 1/14: rhevm-webadmin-portal.noarch 0:3.3.3-0.52.el6ev - u
[ INFO  ] Yum Verify: 2/14: rhevm-restapi.noarch 0:3.3.3-0.52.el6ev - u
[ INFO  ] Yum Verify: 3/14: rhevm-backend.noarch 0:3.3.3-0.52.el6ev - u
[ INFO  ] Yum Verify: 4/14: rhevm.noarch 0:3.3.3-0.52.el6ev - u
[ INFO  ] Yum Verify: 5/14: rhevm-userportal.noarch 0:3.3.3-0.52.el6ev - u
[ INFO  ] Yum Verify: 6/14: rhevm-dbscripts.noarch 0:3.3.3-0.52.el6ev - u
[ INFO  ] Yum Verify: 7/14: rhevm-tools.noarch 0:3.3.3-0.52.el6ev - u
[ INFO  ] Yum Verify: 8/14: rhevm-backend.noarch 0:3.3.2-0.50.el6ev - ud
[ INFO  ] Yum Verify: 9/14: rhevm-restapi.noarch 0:3.3.2-0.50.el6ev - ud
[ INFO  ] Yum Verify: 10/14: rhevm-webadmin-portal.noarch 0:3.3.2-0.50.el6ev - ud
[ INFO  ] Yum Verify: 11/14: rhevm-dbscripts.noarch 0:3.3.2-0.50.el6ev - ud
[ INFO  ] Yum Verify: 12/14: rhevm-tools.noarch 0:3.3.2-0.50.el6ev - ud
[ INFO  ] Yum Verify: 13/14: rhevm-userportal.noarch 0:3.3.2-0.50.el6ev - ud
[ INFO  ] Yum Verify: 14/14: rhevm.noarch 0:3.3.2-0.50.el6ev - ud
[ INFO  ] Stage: Misc configuration
[ INFO  ] Backing up database to '/var/lib/ovirt-engine/backups/engine-20140530093518.WOpbf3.sql'.
[ INFO  ] Updating database schema
[ INFO  ] Generating post install configuration file '/etc/ovirt-engine-setup.conf.d/20-setup-ovirt-post.conf'
[ INFO  ] Stage: Transaction commit
[ INFO  ] Stage: Closing up
         
          --== SUMMARY ==--
         
          An ISO NFS share has been created on this host.
              If IP based access restrictions are required, edit:
              entry /var/lib/exports/iso in /etc/exports
          SSH fingerprint: FF:5B:A8:EB:77:59:5F:9F:26:FF:DD:AC:DE:7D:59:C2
          Internal CA CA:7C:1E:AF:07:20:17:D4:36:4D:81:60:D0:67:68:F4:FF:93:DB:49
          The following network ports should be opened:
              tcp:443
              tcp:5432
              tcp:6100
              tcp:80
          An example of the required configuration for iptables can be found at:
              /etc/ovirt-engine/iptables.example
          Web access is enabled at:
              http://rhevm.xzxj.edu.cn:80/ovirt-engine
              https://rhevm.xzxj.edu.cn:443/ovirt-engine
         
          --== END OF SUMMARY ==--
         
[ INFO  ] Starting engine service
[ INFO  ] Restarting httpd
[ INFO  ] Stage: Clean up
          Log file is located at /var/log/ovirt-engine/setup/ovirt-engine-setup-20140530093354.log
[ INFO  ] Generating answer file '/var/lib/ovirt-engine/setup/answers/20140530093607-upgrade.conf'
[ INFO  ] Stage: Pre-termination
[ INFO  ] Stage: Termination
[ INFO  ] Execution of upgrade completed successfully