Host Unable to Converge With Management Plane

Problem

  • There are multiple processes that are running the vgs command and are stuck.
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  • Hostagent is stuck executing at executing fetch_volumes_present.py extension
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  • This extension of Hostagent /opt/pf9/hostagent/extensions/fetch_volumes_present.py returns a list of volumes present on the host.
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  • The vgs command is stuck on lvmetad service to provide info for Volume Group [Volume Group ID]
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Environment

  • Platform9 Managed OpenStack - v3.6.0 and Higher
  • pf9-hostagent

Cause

The cause of lvm2-lvmetad.service becoming unresponsive is not known.

Resolution

  1. Restart the lvm2-lvmetad.service
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  1. Confirm the service is active.
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  1. After restarting the LVM metadata daemon(metadata cache service for LVM) now we can run commands successfully.
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Additional Information

Directly read devices for VG metadata without lvmetad.

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