2019-06-19 17:50:41,954 - __init__.py[DEBUG]: Network config found dev names: ['ens6', 'eth0']
2019-06-19 17:50:41,954 - __init__.py[DEBUG]: Attempting to run bring up interface ens6 using command ['ifup', 'ens6']
2019-06-19 17:50:41,954 - util.py[DEBUG]: Running command ['ifup', 'ens6'] with allowed return codes [0] (shell=False, capture=True)
2019-06-19 17:50:45,259 - __init__.py[DEBUG]: Attempting to run bring up interface eth0 using command ['ifup', 'eth0']
2019-06-19 17:50:45,259 - util.py[DEBUG]: Running command ['ifup', 'eth0'] with allowed return codes [0] (shell=False, capture=True)
2019-06-19 17:50:45,316 - util.py[WARNING]: Running interface command ['ifup', 'eth0'] failed
2019-06-19 17:50:45,316 - util.py[DEBUG]: Running interface command ['ifup', 'eth0'] failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cloudinit/distros/__init__.py", line 363, in _bring_up_interface
    (_out, err) = util.subp(cmd)
  File "/usr/lib/python2.7/site-packages/cloudinit/util.py", line 2069, in subp
    cmd=args)
ProcessExecutionError: Unexpected error while running command.
Command: ['ifup', 'eth0']
Exit code: 1
Reason: -
Stdout:
        Determining IP information for eth0... failed.
Stderr: dhclient(1265) is already running - exiting.

        This version of ISC DHCP is based on the release available
        on ftp.isc.org.  Features have been added and other changes
        have been made to the base software release in order to make
        it work better with this distribution.

        exiting.