Custom Agent Check script no longer works since datadog-agent 7.38.0

I got the output: (*1)

❯ sudo -u dd-agent -- datadog-agent check custom_dd_agent_status
error: OS version not found in agent metadata cache
=========
Collector
=========

  Running Checks
  ==============

    custom_dd_agent_status (1.5.0)
    ------------------------------
      Instance ID: custom_dd_agent_status:65b6fde3b310d187 [ERROR]
      Configuration Source: file:/etc/datadog-agent/conf.d/custom_dd_agent_status.yaml
      Total Runs: 1
      Metric Samples: Last Run: 0, Total: 0
      Events: Last Run: 0, Total: 0
      Service Checks: Last Run: 0, Total: 0
      Average Execution Time : 150ms
      Last Execution Date : 2022-08-13 16:47:03 JST / 2022-08-13 07:47:03 UTC (1660376823000)
      Last Successful Execution Date : Never
      Error: Extra data: line 1 column 5 (char 4)
      Traceback (most recent call last):
        File "/opt/datadog-agent/embedded/lib/python3.8/site-packages/datadog_checks/base/checks/base.py", line 1120, in run
          self.check(instance)
        File "/etc/datadog-agent/checks.d/custom_dd_agent_status.py", line 125, in check
          agent_status_data = self.get_status()
        File "/etc/datadog-agent/checks.d/custom_dd_agent_status.py", line 46, in get_status
          status = json.loads(out)
        File "/opt/datadog-agent/embedded/lib/python3.8/json/__init__.py", line 357, in loads
          return _default_decoder.decode(s)
        File "/opt/datadog-agent/embedded/lib/python3.8/json/decoder.py", line 340, in decode
          raise JSONDecodeError("Extra data", s, end)
      json.decoder.JSONDecodeError: Extra data: line 1 column 5 (char 4)

Check has run only once, if some metrics are missing you can try again with --check-rate to see any other metric if available.

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

• OS(/etc/os-release): Amazon Linux 2
• CPU Arch(arch): x86_64

Steps to reproduce the issue:

1. clone https://github.com/sogaoh/datadog-agent-status-metricize/

2. configure Custom Agent Check, place the check script custom_dd_agent_status.py

   • refs https://github.com/sogaoh/datadog-agent-status-metricize/blob/main/README.md#get-started

3. (re)start datadog-agent

4. run script

   • sudo -u dd-agent -- datadog-agent check custom_dd_agent_status

Describe the results you received:

(*1)

Describe the results you expected:

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

  Running Checks
  ==============

    custom_dd_agent_status (1.5.0)
    ------------------------------
      Instance ID: custom_dd_agent_status:65b6fde3b310d187 [OK]
      Configuration Source: file:/etc/datadog-agent/conf.d/custom_dd_agent_status.yaml
      Total Runs: 1
      Metric Samples: Last Run: 11, Total: 11
      Events: Last Run: 0, Total: 0
      Service Checks: Last Run: 0, Total: 0
      Average Execution Time : 96ms
      Last Execution Date : 2022-08-13 16:50:41 JST / 2022-08-13 07:50:41 UTC (1660377041000)
      Last Successful Execution Date : 2022-08-13 16:50:41 JST / 2022-08-13 07:50:41 UTC (1660377041000)


Check has run only once, if some metrics are missing you can try again with --check-rate to see any other metric if available.

Additional information you deem important (e.g. issue happens only occasionally):

• OK on Agent 7.37.1 - Commit: 3c29612 - Serialization version: v5.0.22 - Go version: go1.17.11
• ERROR on Agent 7.38.0 above

[sarah-witt]

Hi @sogaoh that’s great to hear! This PR addressed the issue: https://github.com/DataDog/datadog-agent/pull/13117

[sarah-witt]

Hi @sogaoh, agent 7.39.0 was released today, please let us know if this has resolved your issue.