def detect_config_change():
net_devices = NetworkDevice.objects.all()
config_changed = False
for a_device in net_devices:
if 'cisco' in a_device.device_class:
# check if config file exists
if not a_device.cfg_file:
print "Initial device backup: {}".format(a_device.device_name)
backup_config(a_device)
config_changed = True
continue
# Check if the configuration changed
last_changed = int(snmp_wrapper(a_device, oid=global_params.OID_RUNNING_LAST_CHANGED))
if last_changed > a_device.cfg_last_changed:
print ">>>Running configuration changed: {}".format(a_device.device_name)
config_diffs = backup_config(a_device)
config_changed = True
if config_diffs:
print "Sending email notification regarding changes\n"
subject = "Network Device Changed: {}".format(a_device.device_name)
send_mail(global_params.EMAIL_RECIPIENT, subject, config_diffs, global_params.EMAIL_SENDER)
else:
# Update last_changed field to handle reboot case
a_device.cfg_last_changed = last_changed
a_device.save()
if config_changed:
print "Checking configuration changes into git"
git_handling()
def backup_config(a_device):
DEBUG = True
perform_diff = False
if DEBUG: print "Retrieve device configuration via SSH: {}\n".format(a_device.device_name)
ssh_connect = SSHConnection(a_device)
ssh_connect.enable_mode()
output = ssh_connect.send_command('show run\n')
file_name = a_device.device_name + '.txt'
full_path = global_params.CFGS_DIR + file_name
bup_file = global_params.CFGS_DIR + a_device.device_name + '.old'
# Check if file already exists
if os.path.isfile(full_path):
# Create copy of old file
cmd_status = subprocess.call(['/bin/mv', full_path, bup_file])
perform_diff = True
if DEBUG: print "Writing configuration file to file system\n"
with open(full_path, 'w') as f:
f.write(output)
a_device.cfg_file = file_name
a_device.cfg_archive_time = timezone.make_aware(datetime.now(), timezone.get_current_timezone())
# obtain last_changed time (Cisco specific)
a_device.cfg_last_changed = int(snmp_wrapper(a_device, oid=global_params.OID_RUNNING_LAST_CHANGED))
a_device.save()
if perform_diff:
return find_diff(full_path, bup_file)
else:
return None
def detect_config_change():
'''
Use SNMP to detect configuration changes.
If configuration has changed, then:
1. Perform backup
2. Email diff
3. Check change into Git
'''
net_devices = NetworkDevice.objects.all()
config_changed = False
for a_device in net_devices:
if 'cisco' in a_device.device_class:
# check if config file exists
if not a_device.cfg_file:
print "Initial device backup: {}".format(a_device.device_name)
backup_config(a_device)
config_changed = True
continue
# Check if the configuration changed
last_changed = int(
snmp_wrapper(a_device,
oid=global_params.OID_RUNNING_LAST_CHANGED))
if last_changed > a_device.cfg_last_changed:
print ">>>Running configuration changed: {}".format(
a_device.device_name)
config_diffs = backup_config(a_device)
config_changed = True
if config_diffs:
print "Sending email notification regarding changes\n"
subject = "Network Device Changed: {}".format(
a_device.device_name)
send_mail(global_params.EMAIL_RECIPIENT, subject,
config_diffs, global_params.EMAIL_SENDER)
else:
# Update last_changed field to handle reboot case
a_device.cfg_last_changed = last_changed
a_device.save()
if config_changed:
print "Checking configuration changes into git"
git_handling()
def backup_config(a_device):
'''
Retrieve configuration from network device, save to filesystem.
'''
DEBUG = True
perform_diff = False
if DEBUG:
print "Retrieve device configuration via SSH: {}\n".format(
a_device.device_name)
ssh_connect = SSHConnection(a_device)
ssh_connect.enable_mode()
output = ssh_connect.send_command('show run\n')
file_name = a_device.device_name + '.txt'
full_path = global_params.CFGS_DIR + file_name
bup_file = global_params.CFGS_DIR + a_device.device_name + '.old'
# Check if file already exists
if os.path.isfile(full_path):
# Create copy of old file
cmd_status = subprocess.call(['/bin/mv', full_path, bup_file])
perform_diff = True
if DEBUG:
print "Writing configuration file to file system\n"
with open(full_path, 'w') as f:
f.write(output)
a_device.cfg_file = file_name
a_device.cfg_archive_time = timezone.make_aware(
datetime.now(), timezone.get_current_timezone())
# obtain last_changed time (Cisco specific)
a_device.cfg_last_changed = int(
snmp_wrapper(a_device, oid=global_params.OID_RUNNING_LAST_CHANGED))
a_device.save()
if perform_diff:
return find_diff(full_path, bup_file)
else:
return None