[virtual envs] Switch to raw images

[fuel.git] / deploy / environments / virtual_fuel.py

diff --git a/deploy/environments/virtual_fuel.py b/deploy/environments/virtual_fuel.py
index 0e7f273..5ddd93b 100644 (file)
--- a/deploy/environments/virtual_fuel.py
+++ b/deploy/environments/virtual_fuel.py
@@ -11,56 +11,128 @@
 from lxml import etree
 from execution_environment import ExecutionEnvironment
 import tempfile
+import os
+import re
+import time
 
 from common import (
     exec_cmd,
     check_file_exists,
     check_if_root,
     delete,
+    log,
 )
 
+VOL_XML_TEMPLATE = '''<volume type='file'>
+  <name>{name}</name>
+  <capacity unit='{unit}'>{size!s}</capacity>
+  <target>
+    <format type='{format_type}'/>
+  </target>
+</volume>'''
+
+DEFAULT_POOL = 'jenkins'
+
+def get_size_and_unit(s):
+    p = re.compile('^(\d+)\s*(\D+)')
+    m = p.match(s)
+    if m == None:
+        return None, None
+    size = m.groups()[0]
+    unit = m.groups()[1]
+    return size, unit
 
 class VirtualFuel(ExecutionEnvironment):
 
     def __init__(self, storage_dir, pxe_bridge, dha_file, root_dir):
         super(VirtualFuel, self).__init__(storage_dir, dha_file, root_dir)
         self.pxe_bridge = pxe_bridge
+        self.temp_dir = tempfile.mkdtemp()
+        self.vm_name = self.dha.get_node_property(self.fuel_node_id,
+                                                  'libvirtName')
+        self.vm_template = '%s/%s' % (self.root_dir,
+                                      self.dha.get_node_property(
+                                          self.fuel_node_id, 'libvirtTemplate'))
+        check_file_exists(self.vm_template)
+        with open(self.vm_template) as f:
+            self.vm_xml = etree.parse(f)
+
+        self.temp_vm_file = '%s/%s' % (self.temp_dir, self.vm_name)
+        self.update_vm_template_file()
+
+    def __del__(self):
+        delete(self.temp_dir)
+
+    def update_vm_template_file(self):
+        with open(self.temp_vm_file, "wc") as f:
+            self.vm_xml.write(f, pretty_print=True, xml_declaration=True)
 
-    def set_vm_nic(self, temp_vm_file):
-        with open(temp_vm_file) as f:
-            vm_xml = etree.parse(f)
-        interfaces = vm_xml.xpath('/domain/devices/interface')
+    def del_vm_nics(self):
+        interfaces = self.vm_xml.xpath('/domain/devices/interface')
         for interface in interfaces:
             interface.getparent().remove(interface)
+
+    def add_vm_nic(self, bridge):
         interface = etree.Element('interface')
         interface.set('type', 'bridge')
         source = etree.SubElement(interface, 'source')
-        source.set('bridge', self.pxe_bridge)
+        source.set('bridge', bridge)
         model = etree.SubElement(interface, 'model')
         model.set('type', 'virtio')
-        devices = vm_xml.xpath('/domain/devices')
+
+        devices = self.vm_xml.xpath('/domain/devices')
         if devices:
             device = devices[0]
             device.append(interface)
-        with open(temp_vm_file, 'w') as f:
-            vm_xml.write(f, pretty_print=True, xml_declaration=True)
+        else:
+            err('No devices!')
+
+    def create_volume(self, pool, name, su, img_type='raw'):
+        log('Creating image using Libvirt volumes in pool %s, name: %s' %
+            (pool, name))
+        size, unit = get_size_and_unit(su)
+        if size == None:
+            err('Could not determine size and unit of %s' % s)
+
+        vol_xml = VOL_XML_TEMPLATE.format(name=name, unit=unit, size=size,
+                                          format_type=img_type)
+        fname = os.path.join(self.temp_dir, '%s_vol.xml' % name)
+        with file(fname, 'w') as f:
+            f.write(vol_xml)
+
+        exec_cmd('virsh vol-create --pool %s %s' % (pool, fname))
+        vol_path = exec_cmd('virsh vol-path --pool %s %s' % (pool, name))
+
+        delete(fname)
+
+        return vol_path
+
+    def create_image(self, disk_path, disk_size):
+        if os.environ.get('LIBVIRT_DEFAULT_URI') == None:
+            exec_cmd('qemu-img create -f raw %s %s' % (disk_path, disk_size))
+        else:
+            pool = DEFAULT_POOL # FIXME
+            name = os.path.basename(disk_path)
+            disk_path = self.create_volume(pool, name, disk_size)
+
+        return disk_path
 
     def create_vm(self):
-        temp_dir = tempfile.mkdtemp()
-        vm_name = self.dha.get_node_property(self.fuel_node_id, 'libvirtName')
-        vm_template = '%s/%s' % (self.root_dir,
-                                 self.dha.get_node_property(
-                                     self.fuel_node_id, 'libvirtTemplate'))
-        check_file_exists(vm_template)
-        disk_path = '%s/%s.raw' % (self.storage_dir, vm_name)
+        stamp = time.strftime("%Y%m%d%H%M%S")
+        disk_path = '%s/%s-%s.raw' % (self.storage_dir, self.vm_name, stamp)
         disk_sizes = self.dha.get_disks()
         disk_size = disk_sizes['fuel']
-        exec_cmd('qemu-img create -f qcow2 %s %s' % (disk_path, disk_size))
-        temp_vm_file = '%s/%s' % (temp_dir, vm_name)
-        exec_cmd('cp %s %s' % (vm_template, temp_vm_file))
-        self.set_vm_nic(temp_vm_file)
-        self.define_vm(vm_name, temp_vm_file, disk_path)
-        delete(temp_dir)
+        disk_path = self.create_image(disk_path, disk_size)
+
+        self.del_vm_nics()
+        for bridge in self.pxe_bridge:
+            self.add_vm_nic(bridge)
+        self.update_vm_template_file()
+
+        vm_definition_overwrite = self.dha.get_vm_definition('fuel')
+
+        self.define_vm(self.vm_name, self.temp_vm_file, disk_path,
+                       vm_definition_overwrite)
 
     def setup_environment(self):
         check_if_root()