[cisco_aci] collection fails when using a username/password

Output of the info page

Getting the status from the agent.

==============
Agent (v6.5.0)
==============

  Status date: 2018-09-14 13:48:17.782210 UTC
  Pid: 26121
  Python Version: 2.7.15
  Logs: 
  Check Runners: 10
  Log Level: info

  Paths
  =====
    Config File: /opt/datadog-agent/etc/datadog.yaml
    conf.d: /opt/datadog-agent/etc/conf.d
    checks.d: /opt/datadog-agent/etc/checks.d

  Clocks
  ======
    System UTC time: 2018-09-14 13:48:17.782210 UTC

  Host Info
  =========
    bootTime: 2018-09-11 07:37:41.000000 UTC
    kernelVersion: 16.6.0
    os: darwin
    platform: darwin
    platformVersion: 10.12.5
    procs: 446
    uptime: 78h10m29s

  Hostnames
  =========
    hostname: MYHOST
    socket-fqdn: MYHOST
    socket-hostname: MYHOST
    hostname provider: os
    unused hostname providers:
      aws: not retrieving hostname from AWS: the host is not an ECS instance, and other providers already retrieve non-default hostnames
      configuration/environment: hostname is empty
      gce: unable to retrieve hostname from GCE: Get http://169.254.169.254/computeMetadata/v1/instance/hostname: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

=========
Collector
=========

  Running Checks
  ==============
    
    cisco_aci (1.2.0)
    -----------------
        Instance ID: cisco_aci:2d4cf26435def959 [ERROR]
        Total Runs: 1
        Metric Samples: 0, Total: 0
        Events: 0, Total: 0
        Service Checks: 1, Total: 1
        Average Execution Time : 1.022s
        Error: 'NoneType' object has no attribute 'sign'
        Traceback (most recent call last):
        File "/opt/datadog-agent/embedded/lib/python2.7/site-packages/datadog_checks/checks/base.py", line 352, in run
          self.check(copy.deepcopy(self.instances[0]))
        File "/opt/datadog-agent/embedded/lib/python2.7/site-packages/datadog_checks/cisco_aci/cisco.py", line 103, in check
          tenant.collect()
        File "/opt/datadog-agent/embedded/lib/python2.7/site-packages/datadog_checks/cisco_aci/tenant.py", line 44, in collect
          list_apps = self.api.get_apps(t)
        File "/opt/datadog-agent/embedded/lib/python2.7/site-packages/datadog_checks/cisco_aci/api.py", line 190, in get_apps
          response = self.make_request(path)
        File "/opt/datadog-agent/embedded/lib/python2.7/site-packages/datadog_checks/cisco_aci/api.py", line 186, in make_request
          return session.make_request(path)
        File "/opt/datadog-agent/embedded/lib/python2.7/site-packages/datadog_checks/cisco_aci/api.py", line 52, in make_request
          signature = self.cert_key.sign(payload,
      AttributeError: 'NoneType' object has no attribute 'sign'
    
    disk (1.3.0)
    ------------
        Instance ID: disk:e5dffb8bef24336f [OK]
        Total Runs: 1
        Metric Samples: 18, Total: 18
        Events: 0, Total: 0
        Service Checks: 0, Total: 0
        Average Execution Time : 6ms
        
    
    load
    ----
        Instance ID: load [OK]
        Total Runs: 1
        Metric Samples: 6, Total: 6
        Events: 0, Total: 0
        Service Checks: 0, Total: 0
        Average Execution Time : 4ms
        
    
    uptime
    ------
        Instance ID: uptime [OK]
        Total Runs: 1
        Metric Samples: 1, Total: 1
        Events: 0, Total: 0
        Service Checks: 0, Total: 0
        Average Execution Time : 0s
        
  Loading Errors
  ==============
    apm
    ---
      Core Check Loader:
        Could not configure check APM Agent: APM agent disabled through main configuration file
        
      JMX Check Loader:
        check is not a jmx check, or unable to determine if it's so
        
      Python Check Loader:
        No module named apm
        
========
JMXFetch
========

  Initialized checks
  ==================
    no checks
    
  Failed checks
  =============
    no checks
    
=========
Forwarder
=========

  CheckRunsV1: 0
  Dropped: 0
  DroppedOnInput: 0
  Errors: 0
  Events: 0
  HostMetadata: 0
  IntakeV1: 1
  Metadata: 0
  Requeued: 0
  Retried: 0
  RetryQueueSize: 0
  Series: 0
  ServiceChecks: 0
  SketchSeries: 0
  Success: 1
  TimeseriesV1: 0

  API Keys status
  ===============
    API key ending in 0b326 for endpoint https://app.datadoghq.com: API Key valid

==========
Logs Agent
==========

  Logs Agent is not running

=========
DogStatsD
=========

  Checks Metric Sample: 33
  Event: 1
  Service Check: 5

Additional environment details (Operating System, Cloud provider, etc):

Steps to reproduce the issue:

1. configure cisco_aci agent with username and password

Describe the results you received: cisco_aci collection fails when using a username and password

Describe the results you expected: cisco_aci collection works when using a username and password

Additional information you deem important (e.g. issue happens only occasionally): collection works properly when using a cert but not username and password. It looks like it’s probably related to this recent code change to support certs: https://github.com/DataDog/integrations-core/pull/1986

[ofek]

@jgcasd Have you had an opportunity to try the latest release?

@rfarney3 Can you please open a separate issue? Thanks!

[masci]

Closing for lack of activity, feel free to reopen if #2267 didn’t fix it.