Virtualization With KVM And openQRM 5.1 On Debian Wheezy - Page 4

Started the new server, now marked as 'active'. Starting the logical server object triggers to actually start the resource (the KVM VM) with the configured Image (the LVM volume) and triggers additional automatic configuration tasks via a plugin-hook. This server start- and stop hooks are "asking" each activated plugin if there is "some work to do". For a few examples how hooks are used in openQRM please check the list below:

- The DNS plugin is using those hooks to automatically add (or remove) the server name into the managed bind server

- The Dhcpd plugin add the "hostname option" for the server to its configuration

- The Nagios plugin adds/removes service checks for automatic monitoring

- The Puppet plugin activates configured appliaction recipes to automatically setup and pre-configure services on the VM

Go to Plugins -> Virtualization -> KVM -> KVM VMs and select the openQRM server. In the KVM VM overview click on the 'console' button of the VM. This opens a VNC console within your web browser

Please notice!

You need to deactivate the browsers Pop-up Blocker for the openQRM website!

To start the automatic installation please type 'install' in the VNC console and press ENTER.

The KVM VM is now automatically installing a Debian Linux distribution. Good time for you to grab a coffee!

Please notice!

After the automatic installation via the attached LinuxCOE ISO image the VM reboots to the install screen again. We now have to re-configure the VMs boot-sequence to 'local-boot'. To do this please follow the steps below:

- stop the VM by stopping its server object - Datacenter -> Server -> Select + Stop

- in Plugins -> Virtualization -> KVM -> KVM VMs select the KVM Host and udate the VM to boot 'local'

- now start the VM again by starting its server object - Datacenter -> Server -> Select + Start

Here a screenshot of the completed Debian installation after setting the boot-sequence of the VM to 'local'

Install the 'openqrm-local-vm-client'

Now it is recommended to install the 'openqrm-local-vm-client' on the fresh installed system. For local-installed Virtual Machines (e.g. kvm(local VM), xen(local VM), lxc(local VM), openvz(local VM) which have access to the openQRM network the 'openqrm-local-vm-client' activates the plugin-client-boot-services to allow further management functionality (e.g. application deployment with Puppet, system statistics with Collectd etc). Monitoring and openQRM actions are still running on behalf of the VM Host.

The 'openqrm-local-vm-client' also automatically makes sure that the 'acpi-support/acpid' package is installed to enable the reboot/restart functionalities of KVM via the VM monitor socket. To install the 'openqrm-local-vm-client' on VM please follow the steps below:

Copy the 'openqrm-local-vm-client' utility to the running VM

cd /usr/share/openqrm/plugins/local-server/web/local-vm/
scp openqrm-local-vm-client [ip-address-of-the-VM]:/tmp/

Then login to the VM

ssh [ip-address-of-the-VM]

This prompts for the password which was configured in the LinuxCOE automatic-installation template. Please give the password and execute the openqrm-local-vm-client utility

/tmp/openqrm-local-vm-client

This will automatically setup the 'openqrm-local-vm-client' in the system init and start it.

Create additional KVM VMs by cloning/snapshotting the Volume

Go to Plugins -> Virtualization -> KVM -> KVM Volumes and select the 'openqrm-lvm' storage object. Then choose the 'kvmvg' logical volume group to get a list of all available LVM volumes. In this view you can use the 'clone' or 'snap' action to clone or snapshot existing, installed KVM LVM Volumes. The 'clone' action creates a new logical volume and copies the content of the origin over. Snaptshoting is using the "copy-on-write" mechanism of LVM which is much more efficient. Actually a deployd snapshot of a KVM LVM Volume just stores the changes compared to its origin. That means that creating snapshots e.g. per user allows to 'just' store the data which is different per user.

Here the Datacenter Dashboard after we have created the KVM Virtual Machine