"StatId storage.util.filesystem.lvm_snapshot does not exist", clicking on Update tab in VAMI shows the error "List operation failed, please try again"

Products

• VMware vCenter Server

Issue/Introduction

• While patching of the vCenter server pre-check fails with  error :-
  
Error in method invocation Timeout happens while waiting for task to terminate
  
  
  
  
• Appliance management logs report "storage.util.filesystem.lvm_snapshot does not exist" as below
  
  Path: /var/log/vmware/applmgmt/applmgmt.log

ERROR:vmware.appliance.monitoring.stats:Got exception while reading storage stats : 'StatId storage.util.filesystem.lvm_snapshot does not exist.'
Traceback (most recent call last):
  File "/usr/lib/applmgmt/monitoring/py/vmware/appliance/monitoring/stats.py", line 452, in gatherStats
    fsStats = [getFilesystemStats(
  File "/usr/lib/applmgmt/monitoring/py/vmware/appliance/monitoring/stats.py", line 452, in <listcomp>
    fsStats = [getFilesystemStats(
  File "/usr/lib/applmgmt/monitoring/py/vmware/appliance/monitoring/stats.py", line 74, in getFilesystemStats
    return getTotalAndUtilStats(
  File "/usr/lib/applmgmt/monitoring/py/vmware/appliance/monitoring/stats.py", line 171, in getTotalAndUtilStats
    percRaw = reader.getStatValuesRaw(totalKey, start, end)
  File "/usr/lib/applmgmt/monitoring/py/vmware/appliance/monitoring/statsMonitor.py", line 369, in getStatValuesRaw
    self._validate(statId, startTime, endTime)
  File "/usr/lib/applmgmt/monitoring/py/vmware/appliance/monitoring/statsMonitor.py", line 434, in _validate
    raise NotFoundException('StatId %s does not exist.' % statId)
vmware.appliance.monitoring.statsMonitor.NotFoundException: 'StatId storage.util.filesystem.lvm_snapshot does not exist.'

 

• Validating df -h shows the below result with lvm_snapshot missing 
  
  
  
  
• Running #lslblk command also does not show lvm_snapshot mountpoint as below,
  
  

Environment

vCenter Server 7.x
vCenter Server 8.x

Resolution

Recreate the missing lvm_snapshot mountpoint by executing the script "prepare_vc_for_lvm_snapshot.sh" from the KB - LVM snapshot mountpoint is missing on vCenter Server, scripted method to enable LVM snapshot

This script's purpose is to recreate the missing /storage/lvm_snapshot volume.

• Running the script (prepare_vc_for_lvm_snapshot.sh)confirms that snapshot volume is not configured and it in turn creates new the volume
  
  # ./prepare_vc_for_lvm_snapshot.sh
  Enter SSO user name : sso_user_name
  Enter SSO password :
  Enter SDK port ( default : 443 ) :
  INFO Root is on LVM
  INFO Snapshot volume is not configured
  .
  .
  .
  Successfully configured snapshot volume.
  
  

• Validate by running lsblk command to see if "/storage/lvm_snapshot" is recreated