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Add session -> exchange metrics for unroutable_returned and unroutable_dropped Add session -> exchange metrics for accepted WIP Add seesion <-> queue stats Single ETS session table Expose per session metrics in Prometheus Add 'rabbitmqctl list_sessions' CLI command list_channels queries into each channel proc. This commit decides that list_sessions reads the local ETS table instead. Each node sends its session infos directly to the CLI node to avoid large amounts of data being transferred acrosss RabbitMQ nodes. Advantages: * Same code path is used for Prometheus, Management UI, and CLI because they all query the same single source of truth: ETS table `session_metrics`. * Avoid waking up potentially hundreds of thousands of processes at the same time. Disadvantages: * Data is slightly old because the session emits stats every interval (5 seconds by default). But this shouldn't matter for this CLI command.
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deps/rabbitmq_cli/lib/rabbitmq/cli/ctl/commands/list_sessions_command.ex
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| ## This Source Code Form is subject to the terms of the Mozilla Public | ||
| ## License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| ## file, You can obtain one at https://mozilla.org/MPL/2.0/. | ||
| ## | ||
| ## Copyright (c) 2007-2023 Broadcom. All Rights Reserved. The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. All rights reserved. | ||
| ## | ||
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| defmodule RabbitMQ.CLI.Ctl.Commands.ListSessionsCommand do | ||
| alias RabbitMQ.CLI.Core.{DocGuide, Helpers} | ||
| alias RabbitMQ.CLI.Ctl.{InfoKeys, RpcStream} | ||
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| @behaviour RabbitMQ.CLI.CommandBehaviour | ||
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| def scopes(), do: [:ctl, :diagnostics] | ||
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| @info_keys ~w(pid name connection_pid channel_number user vhost handle_max | ||
| in_attach in_flow in_transfer in_disposition in_detach)a | ||
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| def info_keys(), do: @info_keys | ||
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| def merge_defaults([], opts) do | ||
| merge_defaults(~w(pid name user), opts) | ||
| end | ||
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| def merge_defaults(args, opts) do | ||
| {args, Map.merge(%{table_headers: true}, opts)} | ||
| end | ||
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| def validate(args, _) do | ||
| case InfoKeys.validate_info_keys(args, @info_keys) do | ||
| {:ok, _} -> :ok | ||
| err -> err | ||
| end | ||
| end | ||
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| use RabbitMQ.CLI.Core.RequiresRabbitAppRunning | ||
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| def run([], opts) do | ||
| run(~w(pid name user) |> Enum.map(&to_charlist/1), opts) | ||
| end | ||
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| def run([_ | _] = args, %{node: node_name, timeout: timeout}) do | ||
| info_keys = InfoKeys.prepare_info_keys(args) | ||
| broker_keys = InfoKeys.broker_keys(info_keys) | ||
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| Helpers.with_nodes_in_cluster(node_name, fn nodes -> | ||
| RpcStream.receive_list_items( | ||
| node_name, | ||
| :rabbit_amqp_session, | ||
| :emit_info_all, | ||
| [nodes, broker_keys], | ||
| timeout, | ||
| info_keys, | ||
| Kernel.length(nodes) | ||
| ) | ||
| end) | ||
| end | ||
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| use RabbitMQ.CLI.DefaultOutput | ||
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| def formatter(), do: RabbitMQ.CLI.Formatters.Table | ||
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| def banner(_, _), do: "Listing AMQP 1.0 sessions ..." | ||
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| def usage() do | ||
| "list_sessions [--no-table-headers] [<column> ...]" | ||
| end | ||
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| def usage_additional() do | ||
| [ | ||
| ["<column>", "must be one of " <> Enum.join(Enum.sort(@info_keys), ", ")] | ||
| ] | ||
| end | ||
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| def usage_doc_guides() do | ||
| [ | ||
| DocGuide.amqp() | ||
| ] | ||
| end | ||
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| def help_section(), do: :observability_and_health_checks | ||
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| def description(), do: "Lists all AMQP 1.0 sessions" | ||
| end |
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