VMware: volume statistics show wrong values #3416

ISSUE TYPE

• Bug Report

COMPONENT NAME

GetVolumeStatsCommand

CLOUDSTACK VERSION

4.11+ (tested 4.11.2 and Master)

CONFIGURATION

NA

OS / ENVIRONMENT

NA

SUMMARY

physical volume size reported is wrong, and doesn't change after you write a lot of data to the VM's root disk (be it linked clone or full clone)

STEPS TO REPRODUCE

configure "volume.stats.interval" to 60000 (these are milliseconds, not seconds as stated atm - I raised a separate PR for this).

1. Grep management-server.log for "GetVolumeStatsCommand" and observe it's running each minute

2. Inside the VM, write i.e. 50MB to disk - "dd=/dev/urandom of=ddfile bs=1M count=50; sync"

3. Wait for next run of GetVolumeStatsCommand from the mgmt logs - check the size reported in the text output and also on the GUI

EXPECTED RESULTS

Correct physical size is reported

ACTUAL RESULTS

0.53KB reported instead of the real size (linked clone - from image bellow is ~ 220MB)