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agent: Add logging to libvirt qemu hook (#2554)

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This allows logging to the default libvirt qemu hook

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
This commit is contained in:
Rohit Yadav 2018-04-16 17:20:48 +05:30 committed by dahn
parent b69c37862c
commit 156dbf466c
1 changed files with 28 additions and 9 deletions
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37
agent/bindir/libvirtqemuhook.in
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@ -6,25 +6,36 @@
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
#
# http://www.apache.org/licenses/LICENSE-2.0
#
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
import sys
import logging
import re
import sys
from xml.dom.minidom import parse
from cloudutils.configFileOps import configFileOps
from cloudutils.networkConfig import networkConfig
logging.basicConfig(filename='/var/log/libvirt/qemu-hook.log',
filemode='a',
format='%(asctime)s,%(msecs)d %(name)s %(levelname)s %(message)s',
datefmt='%H:%M:%S',
level=logging.INFO)
logger = logging.getLogger('qemu-hook')
def isOldStyleBridge(brName):
if brName.find("cloudVirBr") == 0:
return True
else:
return False
def isNewStyleBridge(brName):
if brName.startswith('brvx-'):
return False
@ -32,12 +43,14 @@ def isNewStyleBridge(brName):
return False
else:
return True
def getGuestNetworkDevice():
netlib = networkConfig()
netlib = networkConfig()
cfo = configFileOps("/etc/cloudstack/agent/agent.properties")
guestDev = cfo.getEntry("guest.network.device")
enslavedDev = netlib.getEnslavedDev(guestDev, 1)
return enslavedDev.split(".")[0]
def handleMigrateBegin():
try:
domain = parse(sys.stdin)
@ -45,20 +58,26 @@ def handleMigrateBegin():
source = interface.getElementsByTagName("source")[0]
bridge = source.getAttribute("bridge")
if isOldStyleBridge(bridge):
vlanId = bridge.replace("cloudVirBr","")
vlanId = bridge.replace("cloudVirBr", "")
elif isNewStyleBridge(bridge):
vlanId = re.sub(r"br(\w+)-","",bridge)
vlanId = re.sub(r"br(\w+)-", "", bridge)
else:
continue
phyDev = getGuestNetworkDevice()
newBrName="br" + phyDev + "-" + vlanId
newBrName = "br" + phyDev + "-" + vlanId
source.setAttribute("bridge", newBrName)
print(domain.toxml())
except:
pass
if __name__ == '__main__':
if len(sys.argv) != 5:
sys.exit(0)
if sys.argv[2] == "migrate" and sys.argv[3] == "begin":
handleMigrateBegin()
# For docs refer https://libvirt.org/hooks.html#qemu
logger.debug("Executing qemu hook with args: %s" % sys.argv)
action, status = sys.argv[2:4]
if action == "migrate" and status == "begin":
handleMigrateBegin()