By the way, if it's not clear, my ultimate goal is to automate everything
so that bare metal servers pxe boot to a razor server, get their CentOS
install ISO and kickstart from razor, get installed, boot up, get their
network interfaces and logical volumes set up, get all the necessary
libvirt packages installed and configured, all the necessary bits required
to get VMs up and running (storage pools, virtual volumes, virtual
networks), VMs get spun up, they connect to razor and get their OSes
installed and everything configured through Puppet.
And the only thing I have to do is turn on the bare metal servers and sign
the puppet certs, although I will likely set the Puppet server to autosign
those as well so everything is automated. This way we can have a set of lab
systems that can be brought up and torn down as quickly as possible.
On Monday, April 28, 2014 12:34:43 PM UTC-7, Alex Scoble wrote:
>
> Hi All,
>
> I'm working on a module that builds KVM/libvirt hosts and populates them
> with predefined VMs.
>
> So far I have the module to where it can create any number of virtual
> nets, storage pools and volumes using virsh, but it isn't pretty.
>
> I've read on various threads here that create_resources is not a good
> function to use. This was stated quite emphatically by R.I. Pienaar and
> others.
>
> Already I've run into the situation where it's hard to control order in
> which two separate create_resources functions are run and I've seen some
> kludges to fix it, but I'm looking for a better way and hoping that it
> doesn't involve the use of custom types because that's currently more than
> I want to deal with.
>
> Here's what I have and hopefully someone can help me do this in a cleaner
> way. Sorry that it's not in Github as I'm not ready to put it there yet.
>
> *This is an example of the hiera data that I'm working with:*
>
> kvm::servertype: 'kvm'
> kvm::virtnet_name: 'br0'
> kvm::virtnet_forwardmode: 'bridge'
> kvm::virtbridge_name: 'br0'
> kvm::virtnet_macaddress: '52:54:00:1F:95:6C'
> kvm::virtpool_hash:
> default:
> virtpool_size: '429496729601'
> iso-images:
> virtpool_target: '/var/lib/libvirt/iso-images'
> virtpool_format: 'iso'
> kvm::virtvol_hash:
> dtlrazorts1.img:
> volcapacity: '80G'
> volformat: 'qcow2'
> dtlrepots1.img:
> volcapacity: '80G'
> volformat: 'qcow2'
> dtlwebvirtmants1.img:
> volcapacity: '60G'
> volformat: 'qcow2'
>
> *My init.pp*
>
> class kvm (
> $servertype = $kvm::params::servertype,
> $virtnet_name = 'undef',
> $virtnet_forwardmode = 'undef',
> $virtbridge_name = 'undef',
> $virtnet_macaddress = 'undef',
> $virtpool_hash = 'undef',
> $virtvol_hash = 'undef',
> ) inherits kvm::params {
>
> include kvm::fw
>
> if ($servertype == 'kvm') {
>
> file { '/var/opt/lib/pe-puppet/temp':
> ensure => directory,
> owner => 'pe-puppet',
> group => 'pe-puppet',
> }
>
> package { ['libvirt',
> 'python-virtinst',
> 'qemu-kvm',
> 'qemu-kvm-tools',
> 'bridge-utils',
> 'virt-manager',
> 'libguestfs-tools',]:
> ensure => present,
> }
>
> service { 'libvirtd':
> ensure => running,
> enable => true,
> hasstatus => true,
> hasrestart => true,
> require => Package['libvirt'],
> }
>
> if $virtpool_hash {
> create_resources('kvm::virtpool', $virtpool_hash)
> }
> include kvm::virtnet
> if $virtvol_hash {
> create_resources('kvm::virtvol', $virtvol_hash)
> }
> }
>
> if $servertype == 'kvmwebmgr' {
> include kvm::kvmwebmgr
> }
>
> }
>
> *The virtpool.pp file:*
>
> define kvm::virtpool (
> $virtpool = $name,
> $virtpool_size = undef,
> $virtpool_target = '/var/lib/libvirt/images',
> $virtpool_type = 'dir',
> $virtpool_format = 'raw',
> ) {
>
> file { "${virtpool_target}":
> ensure => directory,
> } ->
> exec { "virsh pool-define-as ${name} --target ${virtpool_target} --type
> ${virtpool_type} --source-format ${virtpool_format} && virsh pool-autostart
> ${name} && virsh pool-start ${name}":
> path => '/usr/bin',
> unless => "virsh pool-list | /bin/grep ${name}",
> # refreshonly => true,
> }
>
> }
>
> *The virtnet.pp file:*
>
> class kvm::virtnet inherits kvm {
>
> file {
> "/var/opt/lib/pe-puppet/temp/${hostname}_virtnet_${virtnet_name}.xml":
> ensure => file,
> content => template('kvm/virtnet.xml.erb'),
> owner => 'pe-puppet',
> group => 'pe-puppet',
> } ->
> exec { 'virsh net-destroy default && virsh net-undefine default':
> path => '/usr/bin',
> onlyif => 'virsh net-list | /bin/grep default',
> } ->
> exec { "virsh net-define
> /var/opt/lib/pe-puppet/temp/${hostname}_virtnet_${virtnet_name}.xml &&
> virsh net-autostart ${virtnet_name} && virsh net-start ${virtnet_name}":
> path => '/usr/bin',
> unless => "virsh net-list | /bin/grep ${virtnet_name}",
> }
>
> }
>
> *The virtvol.pp file:*
>
> define kvm::virtvol (
> $virtvol = $name,
> $pool = 'default',
> $volcapacity = '60G',
> $volformat = 'qcow2',
> ) {
>
> exec { "virsh vol-create-as ${pool} ${name} ${volcapacity} --format
> ${volformat}":
> path => '/usr/bin',
> unless => "virsh vol-list ${name} | /bin/grep ${name}",
> onlyif => "virsh pool-list ${pool} | /bin/grep ${pool}",
> }
>
> }
>
> *The virtnet.xml.erb:*
>
> <network>
> <name><%= @virtnet_name %></name>
> <forward mode='<%= @virtnet_forwardmode %>' />
> <bridge name='<%= @virtbridge_name %>'/>
> <mac address='<%= @virtnet_macaddress %>'/>
> </network>
>
>
> -----------------------------------------------------------------------------
> end files
>
> -----------------------------------------------------------------------------
>
> It would be super helpful if anyone could point me to a puppet module on
> github that presents me with a better pattern to use with the hiera data.
>
> Any other help or criticisms are also welcome.
>
> Thanks,
>
> Alex
>
>
>
>
>
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