Graham McIntire
33e2ccf51a
- giro_client: remove verify: :verify_none, default to OTP :verify_peer - map_live: validate recovered_band against BandConfig and recovered_time against time_in_window?/2 to prevent stale-state breakage - prom_ex: local fork of Plugins.Phoenix that normalizes transport tag values to prevent telemetry_metrics_prometheus_core dropping series
56 lines
2 KiB
Elixir
56 lines
2 KiB
Elixir
defmodule Microwaveprop.PromEx do
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@moduledoc """
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Prometheus metrics exporter. Combines PromEx's built-in plugins for
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Application/BEAM/Phoenix/Ecto/Oban with our own custom metrics
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(Microwaveprop.Instrument spans, Oban queue-depth gauges).
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A dedicated Prometheus server outside the Kubernetes cluster scrapes
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`/metrics` over the app's normal HTTP endpoint. The `MicrowavepropWeb.Router`
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is responsible for making that route reachable.
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"""
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use PromEx, otp_app: :microwaveprop
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alias PromEx.Plugins
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@impl true
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def plugins do
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# Oban plugin's queue-depth metric is a telemetry_poller that runs
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# an Ecto query every 5 s; in the test env that poller has no
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# sandbox connection and crashes with DBConnection.OwnershipError,
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# so it's skipped there.
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oban_plugin =
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if Application.get_env(:microwaveprop, :prom_ex_include_oban_plugin, true),
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do: [Plugins.Oban],
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else: []
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[
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# Defaults: VM memory, process counts, scheduler util, app version.
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Plugins.Application,
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Plugins.Beam,
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# Phoenix: request duration by route/status, channel/socket events.
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# Uses a local fork that normalizes transport tag values so
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# non-String.Chars transports (e.g., Phoenix.ChannelTest tuples)
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# are not dropped by telemetry_metrics_prometheus_core.
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{Microwaveprop.PromEx.Plugins.Phoenix, router: MicrowavepropWeb.Router, endpoint: MicrowavepropWeb.Endpoint},
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# Ecto: query duration, queue time, pool size.
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{Plugins.Ecto, otp_app: :microwaveprop, repos: [Microwaveprop.Repo]},
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# Our own spans: Instrument.span/3 emits [:microwaveprop | suffix]
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# events; this plugin converts them to Prometheus histograms.
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Microwaveprop.PromEx.InstrumentPlugin
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] ++ oban_plugin
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end
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@impl true
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def dashboards do
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[
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{:prom_ex, "application.json"},
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{:prom_ex, "beam.json"},
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{:prom_ex, "phoenix.json"},
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{:prom_ex, "ecto.json"},
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{:prom_ex, "oban.json"}
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]
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end
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end
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