[Kimchi-devel] [PATCH V3 1/3] Add two function to set and get domain xml metadata

From: ShaoHe Feng <shaohef(a)linux.vnet.ibm.com&gt; Libvirt support two API to set and get domain xml metadata. These two function wrap them. Put them in model/utils.py, so vm_storage and vm_iface can make use of them. For set domain xml metadata, we set live and config xml by default. For get domain xml metadata, we get the current xml by default. Signed-off-by: ShaoHe Feng <shaohef(a)linux.vnet.ibm.com&gt; Signed-off-by: Royce Lv <lvroyce(a)linux.vnet.ibm.com&gt; --- src/kimchi/i18n.py | 1 + src/kimchi/model/utils.py | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) diff --git a/src/kimchi/i18n.py b/src/kimchi/i18n.py index 3fc3013..28b1c4d 100644 --- a/src/kimchi/i18n.py +++ b/src/kimchi/i18n.py @@ -86,6 +86,7 @@ messages = { "KCHVM0026E": _("Group name must be a string"), "KCHVM0027E": _("User %(user)s does not exist"), "KCHVM0028E": _("Group %(group)s does not exist"), + "KCHVM0029E": _("Unable to get access metadata of virtual machine %(name)s. Details: %(err)s"), "KCHVMIF0001E": _("Interface %(iface)s does not exist in virtual machine %(name)s"), "KCHVMIF0002E": _("Network %(network)s specified for virtual machine %(name)s does not exist"), diff --git a/src/kimchi/model/utils.py b/src/kimchi/model/utils.py index 80e1801..51acb68 100644 --- a/src/kimchi/model/utils.py +++ b/src/kimchi/model/utils.py @@ -18,6 +18,11 @@ # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA from kimchi.exception import OperationFailed +import libvirt +from lxml import etree + + +KIMCHI_META_URL = "https://github.com/kimchi-project/kimchi/metadata/" def get_vm_name(vm_name, t_name, name_list): @@ -28,3 +33,39 @@ def get_vm_name(vm_name, t_name, name_list): if vm_name not in name_list: return vm_name raise OperationFailed("KCHUTILS0003E") + + +def get_vm_config_flag(dom, mode="persistent"): + # libvirt.VIR_DOMAIN_AFFECT_CURRENT is 0 + # VIR_DOMAIN_AFFECT_LIVE is 1, VIR_DOMAIN_AFFECT_CONFIG is 2 + flag = {"live": libvirt.VIR_DOMAIN_AFFECT_LIVE, + "persistent": libvirt.VIR_DOMAIN_AFFECT_CONFIG, + "current": libvirt.VIR_DOMAIN_AFFECT_CURRENT, + "all": libvirt.VIR_DOMAIN_AFFECT_CONFIG + + libvirt.VIR_DOMAIN_AFFECT_LIVE if dom.isActive() and + dom.isPersistent() else libvirt.VIR_DOMAIN_AFFECT_CURRENT} + + return flag[mode] + + +def set_vm_metadata_element(dom, meta_xml, mode="all"): + element = etree.fromstring(meta_xml) + # From libvirt doc, Passing None for @metadata says to remove that element + # from the domain XML (passing the empty string leaves the element present) + # Do not support remove the old metadata + dom.setMetadata(libvirt.VIR_DOMAIN_METADATA_ELEMENT, meta_xml, + "kimchi", KIMCHI_META_URL + element.tag, + flags=get_vm_config_flag(dom, mode)) + + +def get_vm_metadata_element(dom, element, mode="current"): + try: + return dom.metadata(libvirt.VIR_DOMAIN_METADATA_ELEMENT, + KIMCHI_META_URL + element, + flags=get_vm_config_flag(dom, mode)) + except libvirt.libvirtError as e: + if e.get_error_code() == libvirt.VIR_ERR_NO_DOMAIN_METADATA: + return "" + else: + raise OperationFailed("KCHVM0029E", {'name': dom.name(), + 'err': e.message}) -- 1.9.0