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# Microsoft Azure Linux Agent
#
# Copyright 2014 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 2.4+ and Openssl 1.0+
#
import signal
import sys
import azurelinuxagent.common.conf as conf
from azurelinuxagent.common.exception import ProtocolError
from azurelinuxagent.common.future import read_input
import azurelinuxagent.common.utils.fileutil as fileutil
import azurelinuxagent.common.utils.shellutil as shellutil
from azurelinuxagent.common.osutil import get_osutil
from azurelinuxagent.common.protocol import get_protocol_util
class DeprovisionAction(object):
def __init__(self, func, args=[], kwargs={}):
self.func = func
self.args = args
self.kwargs = kwargs
def invoke(self):
self.func(*self.args, **self.kwargs)
class DeprovisionHandler(object):
def __init__(self):
self.osutil = get_osutil()
self.protocol_util = get_protocol_util()
self.actions_running = False
signal.signal(signal.SIGINT, self.handle_interrupt_signal)
def del_root_password(self, warnings, actions):
warnings.append("WARNING! root password will be disabled. "
"You will not be able to login as root.")
actions.append(DeprovisionAction(self.osutil.del_root_password))
def del_user(self, warnings, actions):
try:
ovfenv = self.protocol_util.get_ovf_env()
except ProtocolError:
warnings.append("WARNING! ovf-env.xml is not found.")
warnings.append("WARNING! Skip delete user.")
return
username = ovfenv.username
warnings.append(("WARNING! {0} account and entire home directory "
"will be deleted.").format(username))
actions.append(DeprovisionAction(self.osutil.del_account,
[username]))
def regen_ssh_host_key(self, warnings, actions):
warnings.append("WARNING! All SSH host key pairs will be deleted.")
actions.append(DeprovisionAction(fileutil.rm_files,
['/etc/ssh/ssh_host_*key*']))
def stop_agent_service(self, warnings, actions):
warnings.append("WARNING! The waagent service will be stopped.")
actions.append(DeprovisionAction(self.osutil.stop_agent_service))
def del_files(self, warnings, actions):
files_to_del = ['/root/.bash_history', '/var/log/waagent.log']
actions.append(DeprovisionAction(fileutil.rm_files, files_to_del))
def del_resolv(self, warnings, actions):
warnings.append("WARNING! /etc/resolv.conf will be deleted.")
files_to_del = ["/etc/resolv.conf"]
actions.append(DeprovisionAction(fileutil.rm_files, files_to_del))
def del_dhcp_lease(self, warnings, actions):
warnings.append("WARNING! Cached DHCP leases will be deleted.")
dirs_to_del = ["/var/lib/dhclient", "/var/lib/dhcpcd", "/var/lib/dhcp"]
actions.append(DeprovisionAction(fileutil.rm_dirs, dirs_to_del))
# For Freebsd, NM controlled
actions.append(DeprovisionAction(fileutil.rm_files, ["/var/db/dhclient.leases.hn0",
"/var/lib/NetworkManager/dhclient-*.lease"]))
def del_lib_dir(self, warnings, actions):
dirs_to_del = [conf.get_lib_dir()]
actions.append(DeprovisionAction(fileutil.rm_dirs, dirs_to_del))
def reset_hostname(self, warnings, actions):
localhost = ["localhost.localdomain"]
actions.append(DeprovisionAction(self.osutil.set_hostname,
localhost))
actions.append(DeprovisionAction(self.osutil.set_dhcp_hostname,
localhost))
def setup(self, deluser):
warnings = []
actions = []
self.stop_agent_service(warnings, actions)
if conf.get_regenerate_ssh_host_key():
self.regen_ssh_host_key(warnings, actions)
self.del_dhcp_lease(warnings, actions)
self.reset_hostname(warnings, actions)
if conf.get_delete_root_password():
self.del_root_password(warnings, actions)
self.del_lib_dir(warnings, actions)
self.del_files(warnings, actions)
self.del_resolv(warnings, actions)
if deluser:
self.del_user(warnings, actions)
return warnings, actions
def run(self, force=False, deluser=False):
warnings, actions = self.setup(deluser)
for warning in warnings:
print(warning)
if not force:
confirm = read_input("Do you want to proceed (y/n)")
if not confirm.lower().startswith('y'):
return
self.actions_running = True
for action in actions:
action.invoke()
def handle_interrupt_signal(self, signum, frame):
if not self.actions_running:
print("Deprovision is interrupted.")
sys.exit(0)
print ('Deprovisioning may not be interrupted.')
return
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