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pf9-hostagent Failing With Error "No module named 'apt_pkg'"

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Problem

The host is disconnected from Management Plane and pf9-hostagent service is failing and hostagent-daemon.log shows error No module named 'apt_pkg'

customlogger.py INFO - from pf9app.pf9_app_db import Pf9AppDb as AppDb, Pf9AgentDb
customlogger.py INFO -   File "/opt/pf9/hostagent/lib/python3.9/site-packages/pf9app/pf9_app_db.py", line 21, in <module>

customlogger.py INFO - import apt
customlogger.py INFO -   File "/usr/lib/python3/dist-packages/apt/__init__.py", line 23, in <module>

customlogger.py INFO - import apt_pkg
customlogger.py INFO - ModuleNotFoundError
customlogger.py INFO - :
customlogger.py INFO - No module named 'apt_pkg'

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Environment

  • pf9-hostagent

  • Python3

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Cause

When a newer python version is installed the link will update to point to the newest python version, which leads to the error of apt_pkg module not being found.

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Resolution

  • Make sure package python3-apt is installed on the host.

  • Fix the python symblink:

  • Restart pf9-hostagent service:

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