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[stacked 2/5] metrics: add de-facto standard collectors. #404

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[stacked 2/5] metrics: add de-facto standard collectors. #404

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Commits on Nov 14, 2024

  1. metrics: rework metrics collector registry. 

    Rework our metrics collector registry to take care of most
of the necessary bits for metrics registration, collection
and gathering. Use the prometheus-provided namespacing and
subsystems to put all generated metrics under a prefix and
provide additional grouping.

Signed-off-by: Krisztian Litkey <[email protected]>
    @klihub
    klihub committed Nov 14, 2024
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  2. metrics: update cgroupstats collector. 

    Update cgroupstats collector for the reworked metrics registry.
Split out automatic registration to a register subpackage.

Signed-off-by: Krisztian Litkey <[email protected]>
    @klihub
    klihub committed Nov 14, 2024
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  3. resmgr: remove old scattered bits of metrics polling. 

    Remove the old resmgr-triggered polling of policy metrics
and the old resmgr-level polling policy metrics collector.
Implement policy metrics collection in the policy package
itself.

Signed-off-by: Krisztian Litkey <[email protected]>
    @klihub
    klihub committed Nov 14, 2024
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  4. instrumentation: remove opencensus metrics exporter. 

    Remove the old opencensus-based prometheus exporter. Rework
prometheus exporting using our update metrics registry and
a promhttp /metrics-handler.

Signed-off-by: Krisztian Litkey <[email protected]>
    @klihub
    klihub committed Nov 14, 2024
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  5. config: expose metrics configuration. 

    Add configuration bits for controlling which metrics are
collected. Enable collection of policy metrics by default.

Signed-off-by: Krisztian Litkey <[email protected]>
    @klihub
    klihub committed Nov 14, 2024
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  6. resmgr: warn about obsolete command line argument. 

    Remove obsolete and unused option entries. Give a warning about
using the now-obsolete '-metrics-interval' argument. It's used
unconditionally by our existing Helm charts, so we'll phase it
out a bit more gently.

Signed-off-by: Krisztian Litkey <[email protected]>
    @klihub
    klihub committed Nov 14, 2024
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  7. metrics: add standard collectors. 

    Add a metrics/collectors subpackage. When imported it pulls
in and registers the fairly standard buildinfo, process and
golang runtime collectors. Turn on the build info collector
by default.

Signed-off-by: Krisztian Litkey <[email protected]>
    @klihub
    klihub committed Nov 14, 2024
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