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  1. Couchbase Monitoring and Observability Stack
  2. CMOS-130

"Healthy Nodes" and "All Nodes Healthy" stats misleading

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Details

    • Bug
    • Status: Done
    • Major
    • Resolution: Done
    • None
    • 0.1
    • cmos
    • None

    Description

      In the single-cluster overview dashboard, we have two stats that show the number of healthy nodes and whether that's all the nodes in the cluster. This is calculated by combining cbnode_healthy and cbnode_cluster_membership from the Exporter.

      However, when I made the dashboard I misinterpreted the latter metric: it treats a node that's failed over as not a member of the cluster, meaning that e.g. with three nodes and one failed-over it'll show that 2/2 are healthy and thus everything is fine.

      Look into alternate ways of implementing this, or if there are none, remove the "All Nodes Healthy" metric.

      On a similar though less damaging note, "Unhealthy Nodes" can be misleading when there is no data (for example, misconfigured exporter) as it'll show 0.

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          Activity

            Closing; this panel is getting removed altogether in the 7.x version.

            marks.polakovs Marks Polakovs (Inactive) added a comment - Closing; this panel is getting removed altogether in the 7.x version.

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              marks.polakovs Marks Polakovs (Inactive)
              marks.polakovs Marks Polakovs (Inactive)
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                Updated:
                Resolved:

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