Virt-who service fails to start on Red Hat Satellite 6.x with a 'ImportError: cannot import name DependencyWarning' error

Environment

• Red Hat Satellite 6.x

Issue

Virt-who service fails to start on Red Hat Satellite 6.x with the following error:

# systemctl status virt-who.service
● virt-who.service - Daemon for reporting virtual guest IDs to subscription-manager
   Loaded: loaded (/usr/lib/systemd/system/virt-who.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Tue 2022-05-10 13:32:03 EET; 39min ago
  Process: 69849 ExecStart=/usr/bin/virt-who (code=exited, status=1/FAILURE)
 Main PID: 69849 (code=exited, status=1/FAILURE)


May 10 13:32:03 satellite.example.com virt-who[69849]: import virtwho.main
May 10 13:32:03 satellite.example.com virt-who[69849]: File "/usr/lib/python2.7/site-packages/virtwho/main...le>
May 10 13:32:03 satellite.example.com virt-who[69849]: import requests
May 10 13:32:03 satellite.example.com virt-who[69849]: File "/usr/lib/python2.7/site-packages/requests/__i...le>
May 10 13:32:03 satellite.example.com virt-who[69849]: from urllib3.exceptions import DependencyWarning
May 10 13:32:03 satellite.example.com virt-who[69849]: ImportError: cannot import name DependencyWarning
May 10 13:32:03 satellite.example.com systemd[1]: virt-who.service: main process exited, code=exited, sta...LURE
May 10 13:32:03 satellite.example.com systemd[1]: Failed to start Daemon for reporting virtual guest IDs ...ger.
May 10 13:32:03 satellite.example.com systemd[1]: Unit virt-who.service entered failed state.
May 10 13:32:03 satellite.example.com systemd[1]: virt-who.service failed.
Hint: Some lines were ellipsized, use -l to show in full

Resolution

Follow the procedure described in the Diagnostic Steps section. Then based on the outcome, apply the following procedure:

• Execute the following commands on the Satellite server:

# rpm -e --nodeps python2-urllib3
# yum --disableplugin=foreman-protector install python-urllib3

# rpm -e --nodeps python2-chardet
# yum --disableplugin=foreman-protector install python-chardet

# rpm -e --nodeps python2-requests
# yum --disableplugin=foreman-protector install python-requests

• Verify that the virt-who service can now start successfully:

# systemctl start virt-who.service
# systemctl status virt-who.service

For more KB articles/solutions related to Virt-who and Virtual Datacenter (VDC) Subscriptions Issues, please refer to the Consolidated Troubleshooting Article for Virt-who and Virtual Datacenter (VDC) Subscriptions Issues

Diagnostic Steps

• Run the following commands on the Satellite server:

# service virt-who stop
# virt-who -dp &> /tmp/mappings.txt
# service virt-who start

• Check the contents of the mappings.txt file. If you see a backtrace like this one:

/usr/lib/python2.7/site-packages/requests/__init__.py:91: RequestsDependencyWarning: urllib3 (1.10.2) or chardet (3.0.4) doesn't match a supported version!
  RequestsDependencyWarning)
Traceback (most recent call last):
  File "/bin/virt-who", line 9, in <module>
    load_entry_point('virt-who==0.28.10', 'console_scripts', 'virt-who')()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 558, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2682, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2355, in load
    return self.resolve()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2361, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python2.7/site-packages/virtwho/__main__.py", line 8, in <module>
    import virtwho.main
  File "/usr/lib/python2.7/site-packages/virtwho/main.py", line 26, in <module>
    import requests
  File "/usr/lib/python2.7/site-packages/requests/__init__.py", line 94, in <module>
    from urllib3.exceptions import DependencyWarning
ImportError: cannot import name DependencyWarning

run the following commands on the Satellite server:

# rpm -qa | grep -i urllib3*
# rpm -qa | grep -i chardet
# rpm -qa | grep requests

The outputs from these 3 commands should be as follows:

# rpm -qa | grep -i urllib3*
python3-urllib3-1.25.11-1.el7pc.noarch
python-urllib3-1.10.2-7.el7.noarch

# rpm -qa | grep -i chardet
python3-chardet-3.0.4-10.el7ar.noarch
python-chardet-2.2.1-3.el7.noarch

# rpm -qa | grep requests
python3-requests-2.24.0-1.el7pc.noarch
python-requests-2.6.0-10.el7.noarch 

respectively.

• If the outputs from the two commands are something like:

# rpm -qa | grep -i urllib3*
python2-urllib3-1.24.3-2.el7.noarch
python3-urllib3-1.25.11-1.el7pc.noarch

# rpm -qa | grep -i chardet
python2-chardet-3.0.4-7.el7ost.noarch
python3-chardet-3.0.4-10.el7ar.noarch

# rpm -qa | grep requests
python3-requests-2.24.0-1.el7pc.noarch
python2-requests-2.19.1-6.el7.noarch

then apply the procedure in the Resolution section.

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