Host scores values in RHEV3.4 Self Hosted-Engine setup
Environment
- Red Hat Enterprise Virtualization (RHEV) 3.4
- ovirt-hosted-engine-setup
Issue
Hosts in RHEV Self Hosted-Engine setup get different scores.
What does that score mean?
Resolution
Score is a value between 0 to 2400. And it represents host' suitability for running engine VM.
- 0 means unsuitable
- 2400 means all is well
The score is calculated based on host status. Each monitor (ping, cpu load, gateway status, ...) has a weight and contributes to the score.
Score weights:
1000 - gateway address is pingable
800 - host's management network bridge is up
400 - host has 4GB of memory free to run the engine VM
100 - host's cpu load is less than 80% of capacity
100 - host's memory usage is less than 80% of capacity
Adjustments:
-50 - subtraction for each failed vm startup attempt
0 - score reset to 0 after 3 attempts, for 10 minutes
Origin: ovirt.org.
Diagnostic Steps
To get the score of the host, run:
# hosted-engine --vm-status
It will show status of each host and its score.
For instance:
Status up-to-date : True
Hostname : 10.10.177.193
Host ID : 2
Engine status : {"health": "good", "vm": "up", "detail": "up"}
Score : 2400 <<--------------------
Local maintenance : False
Host timestamp : 1408390728
Extra metadata (valid at timestamp):
metadata_parse_version=1
metadata_feature_version=1
timestamp=1408390728 (Mon Aug 18 15:38:48 2014)
host-id=2
score=2400
maintenance=False
state=EngineUp
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