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#
# Copyright 2018 Microsoft Corporation
#
# Licensed 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.
#
# Requires Python 2.6+ and Openssl 1.0+
#
import time
import azurelinuxagent.common.logger as logger
import azurelinuxagent.common.utils.shellutil as shellutil
from azurelinuxagent.common.osutil.default import DefaultOSUtil
class Ubuntu14OSUtil(DefaultOSUtil):
def __init__(self):
super(Ubuntu14OSUtil, self).__init__()
self.jit_enabled = True
self.service_name = self.get_service_name()
@staticmethod
def get_service_name():
return "walinuxagent"
def start_network(self):
return shellutil.run("service networking start", chk_err=False)
def stop_agent_service(self):
return shellutil.run("service {0} stop".format(self.service_name), chk_err=False)
def start_agent_service(self):
return shellutil.run("service {0} start".format(self.service_name), chk_err=False)
def remove_rules_files(self, rules_files=""):
pass
def restore_rules_files(self, rules_files=""):
pass
def get_dhcp_lease_endpoint(self):
return self.get_endpoint_from_leases_path('/var/lib/dhcp/dhclient.*.leases')
class Ubuntu12OSUtil(Ubuntu14OSUtil):
def __init__(self):
super(Ubuntu12OSUtil, self).__init__()
# Override
def get_dhcp_pid(self):
return self._get_dhcp_pid(["pidof", "dhclient3"])
def mount_cgroups(self):
pass
class Ubuntu16OSUtil(Ubuntu14OSUtil):
"""
Ubuntu 16.04, 16.10, and 17.04.
"""
def __init__(self):
super(Ubuntu16OSUtil, self).__init__()
self.service_name = self.get_service_name()
def register_agent_service(self):
return shellutil.run("systemctl unmask {0}".format(self.service_name), chk_err=False)
def unregister_agent_service(self):
return shellutil.run("systemctl mask {0}".format(self.service_name), chk_err=False)
def mount_cgroups(self):
"""
Mounted by default in Ubuntu 16.04
"""
pass
class Ubuntu18OSUtil(Ubuntu16OSUtil):
"""
Ubuntu 18.04
"""
def __init__(self):
super(Ubuntu18OSUtil, self).__init__()
self.service_name = self.get_service_name()
def get_dhcp_pid(self):
return self._get_dhcp_pid(["pidof", "systemd-networkd"])
def start_network(self):
return shellutil.run("systemctl start systemd-networkd", chk_err=False)
def stop_network(self):
return shellutil.run("systemctl stop systemd-networkd", chk_err=False)
def start_dhcp_service(self):
return self.start_network()
def stop_dhcp_service(self):
return self.stop_network()
def start_agent_service(self):
return shellutil.run("systemctl start {0}".format(self.service_name), chk_err=False)
def stop_agent_service(self):
return shellutil.run("systemctl stop {0}".format(self.service_name), chk_err=False)
class UbuntuOSUtil(Ubuntu16OSUtil):
def __init__(self):
super(UbuntuOSUtil, self).__init__()
def restart_if(self, ifname, retries=3, wait=5):
"""
Restart an interface by bouncing the link. systemd-networkd observes
this event, and forces a renew of DHCP.
"""
retry_limit=retries+1
for attempt in range(1, retry_limit):
return_code=shellutil.run("ip link set {0} down && ip link set {0} up".format(ifname))
if return_code == 0:
return
logger.warn("failed to restart {0}: return code {1}".format(ifname, return_code))
if attempt < retry_limit:
logger.info("retrying in {0} seconds".format(wait))
time.sleep(wait)
else:
logger.warn("exceeded restart retries")
class UbuntuSnappyOSUtil(Ubuntu14OSUtil):
def __init__(self):
super(UbuntuSnappyOSUtil, self).__init__()
self.conf_file_path = '/apps/walinuxagent/current/waagent.conf'