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Add possibility to configure HDD cache mode during instance creation

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This commit is contained in:
Benjamin Renard 2016-04-17 23:41:40 +02:00
parent e1d3be17f1
commit 9520282a4b
4 changed files with 43 additions and 6 deletions
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21
vrtManager/create.py
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@ -48,6 +48,17 @@ class wvmCreate(wvmConnect):
"""Get guest capabilities"""
return util.get_xml_path(self.get_cap_xml(), "/capabilities/host/cpu/arch")
def get_cache_modes(self):
"""Get cache available modes"""
return {
'default': 'Default',
'none': 'Disabled',
'writethrough': 'Write through',
'writeback': 'Write back',
'directsync': 'Direct sync', # since libvirt 0.9.5
'unsafe': 'Unsafe', # since libvirt 0.9.7
}
def create_volume(self, storage, name, size, format='qcow2', metadata=False):
size = int(size) * 1073741824
stg = self.get_storage(storage)
@ -129,7 +140,7 @@ class wvmCreate(wvmConnect):
vol = self.get_volume_by_path(path)
vol.delete()
def create_instance(self, name, memory, vcpu, host_model, uuid, images, networks, virtio, mac=None):
def create_instance(self, name, memory, vcpu, host_model, uuid, images, cache_mode, networks, virtio, mac=None):
"""
Create VM function
"""
@ -172,11 +183,11 @@ class wvmCreate(wvmConnect):
if stg_type == 'rbd':
ceph_user, secret_uuid, ceph_hosts = get_rbd_storage_data(stg)
xml += """<disk type='network' device='disk'>
<driver name='qemu' type='%s'/>
<driver name='qemu' type='%s' cache='%s'/>
<auth username='%s'>
<secret type='ceph' uuid='%s'/>
</auth>
<source protocol='rbd' name='%s'>""" % (img_type, ceph_user, secret_uuid, image)
<source protocol='rbd' name='%s'>""" % (img_type, cache_mode, ceph_user, secret_uuid, image)
if isinstance(ceph_hosts, list):
for host in ceph_hosts:
if host.get('port'):
@ -189,8 +200,8 @@ class wvmCreate(wvmConnect):
</source>"""
else:
xml += """<disk type='file' device='disk'>
<driver name='qemu' type='%s'/>
<source file='%s'/>""" % (img_type, image)
<driver name='qemu' type='%s' cache='%s'/>
<source file='%s'/>""" % (img_type, cache_mode, image)
if virtio:
xml += """<target dev='vd%s' bus='virtio'/>""" % (disk_letters.pop(0),)