forked from mirrors/akkoma
61 lines
1.6 KiB
Elixir
61 lines
1.6 KiB
Elixir
defmodule Pleroma.Healthcheck do
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@moduledoc """
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Module collects metrics about app and assign healthy status.
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"""
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alias Pleroma.Healthcheck
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alias Pleroma.Repo
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defstruct pool_size: 0,
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active: 0,
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idle: 0,
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memory_used: 0,
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healthy: true
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@type t :: %__MODULE__{
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pool_size: non_neg_integer(),
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active: non_neg_integer(),
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idle: non_neg_integer(),
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memory_used: number(),
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healthy: boolean()
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}
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@spec system_info() :: t()
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def system_info do
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%Healthcheck{
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memory_used: Float.round(:erlang.memory(:total) / 1024 / 1024, 2)
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}
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|> assign_db_info()
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|> check_health()
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end
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defp assign_db_info(healthcheck) do
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database = Application.get_env(:pleroma, Repo)[:database]
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query =
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"select state, count(pid) from pg_stat_activity where datname = '#{database}' group by state;"
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result = Repo.query!(query)
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pool_size = Application.get_env(:pleroma, Repo)[:pool_size]
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db_info =
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Enum.reduce(result.rows, %{active: 0, idle: 0}, fn [state, cnt], states ->
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if state == "active" do
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Map.put(states, :active, states.active + cnt)
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else
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Map.put(states, :idle, states.idle + cnt)
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end
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end)
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|> Map.put(:pool_size, pool_size)
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Map.merge(healthcheck, db_info)
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end
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@spec check_health(Healthcheck.t()) :: Healthcheck.t()
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def check_health(%{pool_size: pool_size, active: active} = check)
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when active >= pool_size do
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%{check | healthy: false}
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end
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def check_health(check), do: check
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end
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