Hostagent Stuck While Executing an Extension

Problem

• A Platform9 managed host is showing offline from Clarity UI.

• The Hostagent i.e. pf9-hostagent service has a forked process which is running a script from /opt/pf9/hostagent/extensions.

• The forked process is in a ' D' (defunct) state.

Environment

• Platform9 Managed OpenStack - All Versions

• Platform9 Managed Kubernetes - All Versions

Cause

There may be various factors which can contribute to one of the Hostagent extension scripts failing to execute and subsequently entering a defunct state.

Resolution

1. Inspect the script in question and identify if any of the commands may be ran manually.

Example: /opt/pf9/hostagent/extensions/fetch_mounted_nfs.py

The corresponding command would be as follows.

2. If the command executes successfully, proceed to Step #3. Otherwise, you will need to identify what is causing the command to fail.

3. Stop the pf9-hostagent service.

4. Kill any remaining forked processes (if present).

5. Start pf9-hostagent service.