3.4. Configuring the Self-Hosted Engine

Summary

When package installation is complete, the Red Hat Enterprise Virtualization Manager must be configured. The hosted-engine deployment script is provided to assist with this task. The script asks you a series of questions, and configures your environment based on your answers. When the required values have been provided, the updated configuration is applied and the Red Hat Enterprise Virtualization Manager services are started.

The hosted-engine deployment script guides you through several distinct configuration stages. The script suggests possible configuration defaults in square brackets. Where these default values are acceptable, no additional input is required.
This procedure requires a new Red Hat Enterprise Linux 6.5 or 6.6 host with the ovirt-hosted-engine-setup package installed. This host is referred to as 'Host-HE1', with a fully qualified domain name (FQDN) of Host-HE1.example.com in this procedure.
The hosted engine, the virtual machine created during configuration of Host-HE1 to manage the environment, is referred to as 'my-engine'. You will be prompted by the hosted-engine deployment script to access this virtual machine multiple times to install an operating system and to configure the engine.
All steps in this procedure are to be conducted as the root user for the specified machine.

Procedure 3.2. Configuring the Self-Hosted Engine

  1. Initiating Hosted Engine Deployment

    Begin configuration of the self-hosted environment by deploying the hosted-engine customization script on Host_HE1. To escape the script at any time, use the CTRL+D keyboard combination to abort deployment. 
    # hosted-engine --deploy

  2. Configuring Storage

    Select the version of NFS and specify the full address, using either the FQDN or IP address, and path name of the shared storage domain. Choose the storage domain and storage data center names to be used in the environment. 
    During customization use CTRL-D to abort.
Please specify the storage you would like to use (nfs3, nfs4)[nfs3]: 
Please specify the full shared storage connection path to use (example: host:/path): storage.example.com:/hosted_engine/nfs
[ INFO  ] Installing on first host
Please provide storage domain name. [hosted_storage]: 
Local storage datacenter name is an internal name and currently will not be shown in engine's admin UI.Please enter local datacenter name [hosted_datacenter]:

  3. Configuring the Network

    The script detects possible network interface controllers (NICs) to use as a management bridge for the environment. It then checks your firewall configuration and offers to modify it for console (SPICE or VNC) access HostedEngine-VM. Provide a pingable gateway IP address, to be used by the ovirt-ha-agent to help determine a host's suitability for running HostedEngine-VM. 
    Please indicate a nic to set rhevm bridge on: (eth1, eth0) [eth1]:
iptables was detected on your computer, do you wish setup to configure it? (Yes, No)[Yes]: 
Please indicate a pingable gateway IP address [X.X.X.X]:

  4. Configuring the Virtual Machine

    The script creates a virtual machine to be configured as the Red Hat Enterprise Virtualization Manager, the hosted engine referred to in this procedure as HostedEngine-VM. Specify the boot device and, if applicable, the path name of the installation media, the CPU type, the number of virtual CPUs, and the disk size. Specify a MAC address for the HostedEngine-VM, or accept a randomly generated one. The MAC address can be used to update your DHCP server prior to installing the operating system on the virtual machine. Specify memory size and console connection type for the creation of HostedEngine-VM. 
    Please specify the device to boot the VM from (cdrom, disk, pxe) [cdrom]: 
The following CPU types are supported by this host:
          - model_Penryn: Intel Penryn Family
          - model_Conroe: Intel Conroe Family
Please specify the CPU type to be used by the VM [model_Penryn]: 
Please specify the number of virtual CPUs for the VM [Defaults to minimum requirement: 2]: 
Please specify the disk size of the VM in GB [Defaults to minimum requirement: 25]: 
You may specify a MAC address for the VM or accept a randomly generated default [00:16:3e:77:b2:a4]: 
Please specify the memory size of the VM in MB [Defaults to minimum requirement: 4096]: 
Please specify the console type you would like to use to connect to the VM (vnc, spice) [vnc]:

  5. Configuring the Hosted Engine

    Specify the name for Host-HE1 to be identified in the Red Hat Enterprise Virtualization environment, and the password for the admin@internal user to access the Administrator Portal. Provide the FQDN for HostedEngine-VM; this procedure uses the FQDN HostedEngine-VM.example.com. Finally, provide the name and TCP port number of the SMTP server, the email address used to send email notifications, and a comma-separated list of email addresses to receive these notifications. 
    Enter the name which will be used to identify this host inside the Administrator Portal [hosted_engine_1]: Host-HE1
Enter 'admin@internal' user password that will be used for accessing the Administrator Portal: 
Confirm 'admin@internal' user password: 
Please provide the FQDN for the engine you would like to use. This needs to match the FQDN that you will use for the engine installation within the VM: HostedEngine-VM.example.com
Please provide the name of the SMTP server through which we will send notifications [localhost]: 
Please provide the TCP port number of the SMTP server [25]: 
Please provide the email address from which notifications will be sent [root@localhost]: 
Please provide a comma-separated list of email addresses which will get notifications [root@localhost]:

  6. Configuration Preview

    Before proceeding, the hosted-engine script displays the configuration values you have entered, and prompts for confirmation to proceed with these values. 
    Bridge interface                   : eth1
Engine FQDN                        : HostedEngine-VM.example.com
Bridge name                        : rhevm
SSH daemon port                    : 22
Firewall manager                   : iptables
Gateway address                    : X.X.X.X
Host name for web application      : Host-HE1
Host ID                            : 1
Image size GB                      : 25
Storage connection                 : storage.example.com:/hosted_engine/nfs
Console type                       : vnc
Memory size MB                     : 4096
MAC address                        : 00:16:3e:77:b2:a4
Boot type                          : pxe
Number of CPUs                     : 2
CPU Type                           : model_Penryn

Please confirm installation settings (Yes, No)[No]:

  7. Creating HostedEngine-VM

    The script creates a virtual machine to be HostedEngine-VM and provides connection details. You must install an operating system on HostedEngine-VM before the hosted-engine script can proceed on Host-HE1. 
    [ INFO  ] Generating answer file '/etc/ovirt-hosted-engine/answers.conf'
[ INFO  ] Stage: Transaction setup
[ INFO  ] Stage: Misc configuration
[ INFO  ] Stage: Package installation
[ INFO  ] Stage: Misc configuration
[ INFO  ] Configuring libvirt
[ INFO  ] Generating VDSM certificates
[ INFO  ] Configuring VDSM
[ INFO  ] Starting vdsmd
[ INFO  ] Waiting for VDSM hardware info
[ INFO  ] Creating Storage Domain
[ INFO  ] Creating Storage Pool
[ INFO  ] Connecting Storage Pool
[ INFO  ] Verifying sanlock lockspace initialization
[ INFO  ] Initializing sanlock lockspace
[ INFO  ] Initializing sanlock metadata
[ INFO  ] Creating VM Image
[ INFO  ] Disconnecting Storage Pool
[ INFO  ] Start monitoring domain
[ INFO  ] Configuring VM
[ INFO  ] Updating hosted-engine configuration
[ INFO  ] Stage: Transaction commit
[ INFO  ] Stage: Closing up
[ INFO  ] Creating VM
You can now connect to the VM with the following command:
	/usr/bin/remote-viewer vnc://localhost:5900
Use temporary password "3042QHpX" to connect to vnc console.
Please note that in order to use remote-viewer you need to be able to run graphical applications.
This means that if you are using ssh you have to supply the -Y flag (enables trusted X11 forwarding).
Otherwise you can run the command from a terminal in your preferred desktop environment.
If you cannot run graphical applications you can connect to the graphic console from another host or connect to the console using the following command:
virsh -c qemu+tls://Test/system console HostedEngine
If you need to reboot the VM you will need to start it manually using the command:
hosted-engine --vm-start
You can then set a temporary password using the command:
hosted-engine --add-console-password
The VM has been started.  Install the OS and shut down or reboot it.  To continue please make a selection:
         
          (1) Continue setup - VM installation is complete
          (2) Reboot the VM and restart installation
          (3) Abort setup
         
          (1, 2, 3)[1]:
    Using the naming convention of this procedure, connect to the virtual machine using VNC with the following command: 
    /usr/bin/remote-viewer vnc://Host-HE1.example.com:5900

  8. Installing the Virtual Machine Operating System

    Connect to HostedEngine-VM, the virtual machine created by the hosted-engine script, and install a Red Hat Enterprise Linux 6.5 or 6.6 operating system. Ensure the machine is rebooted once installation has completed.

  9. Synchronizing the Host and the Virtual Machine

    Return to Host-HE1 and continue the hosted-engine deployment script by selecting option 1: 
    (1) Continue setup - VM installation is complete
     Waiting for VM to shut down...
[ INFO  ] Creating VM
You can now connect to the VM with the following command:
	/usr/bin/remote-viewer vnc://localhost:5900
Use temporary password "3042QHpX" to connect to vnc console.
Please note that in order to use remote-viewer you need to be able to run graphical applications.
This means that if you are using ssh you have to supply the -Y flag (enables trusted X11 forwarding).
Otherwise you can run the command from a terminal in your preferred desktop environment.
If you cannot run graphical applications you can connect to the graphic console from another host or connect to the console using the following command:
virsh -c qemu+tls://Test/system console HostedEngine
If you need to reboot the VM you will need to start it manually using the command:
hosted-engine --vm-start
You can then set a temporary password using the command:
hosted-engine --add-console-password
Please install and setup the engine in the VM.
You may also be interested in subscribing to "agent" RHN/Satellite channel and installing rhevm-guest-agent-common package in the VM.
To continue make a selection from the options below:
          (1) Continue setup - engine installation is complete
          (2) Power off and restart the VM
          (3) Abort setup

  10. Installing the Manager

    Connect to HostedEngine-VM, subscribe to the appropriate Red Hat Enterprise Virtualization Manager channels, ensure that the most up-to-date versions of all installed packages are in use, and install the rhevm packages. 
    # yum upgrade
    # yum install rhevm

  11. Configuring the Manager

    Configure the engine on HostedEngine-VM: 
    # engine-setup

  12. Synchronizing the Host and the Manager

    Return to Host-HE1 and continue the hosted-engine deployment script by selecting option 1: 
    (1) Continue setup - engine installation is complete
    [ INFO  ] Engine replied: DB Up!Welcome to Health Status!
[ INFO  ] Waiting for the host to become operational in the engine. This may take several minutes...
[ INFO  ] Still waiting for VDSM host to become operational...
[ INFO  ] The VDSM Host is now operational
          Please shutdown the VM allowing the system to launch it as a monitored service.
          The system will wait until the VM is down.

  13. Shutting Down HostedEngine-VM

    Shutdown HostedEngine-VM. 
    # shutdown now

  14. Setup Confirmation

    Return to Host-HE1 to confirm it has detected that HostedEngine-VM is down. 
    [ INFO  ] Enabling and starting HA services
          Hosted Engine successfully set up
[ INFO  ] Stage: Clean up
[ INFO  ] Stage: Pre-termination
[ INFO  ] Stage: Termination
Result

When the hosted-engine deployment script completes successfully, the Red Hat Enterprise Virtualization Manager is configured and running on your server. In contrast to a bare-metal Manager installation, the hosted engine Manager has already configured the data center, cluster, host (Host-HE1), storage domain, and virtual machine of the hosted engine (HostedEngine-VM). You can log in as the admin@internal user to continue configuring the Manager and add further resources.

Link your Red Hat Enterprise Virtualization Manager to a directory server so you can add additional users to the environment. Red Hat Enterprise Virtualization supports directory services from Red Hat Directory Services (RHDS), IdM, and Active Directory. Add a directory server to your environment using the engine-manage-domains command.
The ovirt-host-engine-setup script also saves the answers you gave during configuration to a file, to help with disaster recovery. If a destination is not specified using the --generate-answer=<file> argument, the answer file is generated at /etc/ovirt-hosted-engine/answers.conf.
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