Prometheus Exporter: hosts tagged and in maintenance are considered Online

[benj-n]

ISSUE TYPE

• Bug Report

COMPONENT NAME

Prometheus Exporter

CLOUDSTACK VERSION

4.18

CONFIGURATION

N/A

OS / ENVIRONMENT

N/A

SUMMARY

When considering maintenance for a host, Prometheus exporter doesn't have the same behaviour if the host has a tag or not.

STEPS TO REPRODUCE

1. In a cluster with at least one host (two hosts for this test), activate prometheus exporter
2. Add a tag "mytag" on both hosts
3. Enable Maintenance on one host
4. Verify in prometheus the values for the metrics 'cloudstack_hosts_total' and 'cloudstack_hosts_total_by_tag'

EXPECTED RESULTS

Whether the host tag is considered or not, the host status (online/offline) should be reported identically by prometheus exporter.
The results should be (for one tagged host fully active, and one tagged host in maintenance):

cloudstack_hosts_total filter=ONLINE     -> 1
cloudstack_hosts_total filter=OFFLINE    -> 1
cloudstack_hosts_total filter=TOTAL      -> 2

cloudstack_hosts_total_by_tag tags=mytag filter=ONLINE     -> 1
cloudstack_hosts_total_by_tag tags=mytag filter=OFFLINE    -> 1
cloudstack_hosts_total_by_tag tags=mytag filter=TOTAL      -> 2

ACTUAL RESULTS

The metrics are different if the tag is taken into account or not:

cloudstack_hosts_total filter=ONLINE     -> 1
cloudstack_hosts_total filter=OFFLINE    -> 1
cloudstack_hosts_total filter=TOTAL      -> 2

cloudstack_hosts_total_by_tag tags=mytag filter=ONLINE     -> 2
cloudstack_hosts_total_by_tag tags=mytag filter=OFFLINE    -> 0
cloudstack_hosts_total_by_tag tags=mytag filter=TOTAL      -> 2