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## The contents of this file are subject to the Mozilla Public License
## Version 1.1 (the "License"); you may not use this file except in
## compliance with the License. You may obtain a copy of the License
## at http://www.mozilla.org/MPL/
##
## Software distributed under the License is distributed on an "AS IS"
## basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
## the License for the specific language governing rights and
## limitations under the License.
##
## The Original Code is RabbitMQ.
##
## The Initial Developer of the Original Code is GoPivotal, Inc.
## Copyright (c) 2007-2019 Pivotal Software, Inc. All rights reserved.
defmodule RabbitMQ.CLI.Diagnostics.Commands.AlarmsCommand do
@moduledoc """
Displays all alarms reported by the target node.
Returns a code of 0 unless there were connectivity and authentication
errors. This command is not meant to be used in health checks.
"""
alias RabbitMQ.CLI.Core.Helpers
import RabbitMQ.CLI.Diagnostics.Helpers,
only: [alarm_lines: 2, local_alarms: 2, clusterwide_alarms: 2]
@behaviour RabbitMQ.CLI.CommandBehaviour
use RabbitMQ.CLI.Core.AcceptsDefaultSwitchesAndTimeout
use RabbitMQ.CLI.Core.MergesNoDefaults
use RabbitMQ.CLI.Core.AcceptsNoPositionalArguments
use RabbitMQ.CLI.Core.RequiresRabbitAppRunning
def run([], %{node: node_name, timeout: timeout}) do
# Example response when there are alarms:
#
# [
# file_descriptor_limit,
# {{resource_limit,disk,hare@warp10},[]},
# {{resource_limit,memory,hare@warp10},[]},
# {{resource_limit,disk,rabbit@warp10},[]},
# {{resource_limit,memory,rabbit@warp10},[]}
# ]
#
# The topmost file_descriptor_limit alarm is node-local.
:rabbit_misc.rpc_call(node_name, :rabbit_alarm, :get_alarms, [], timeout)
end
def output([], %{node: node_name, formatter: "json"}) do
{:ok, %{"result" => "ok", "node" => node_name, "alarms" => []}}
end
def output([], %{node: node_name}) do
{:ok, "Node #{node_name} reported no alarms, local or clusterwide"}
end
def output(alarms, %{node: node_name, formatter: "json"}) do
local = local_alarms(alarms, node_name)
global = clusterwide_alarms(alarms, node_name)
{:ok,
%{
"result" => "ok",
"local" => alarm_lines(local, node_name),
"global" => alarm_lines(global, node_name),
"message" => "Node #{node_name} reported alarms"
}}
end
def output(alarms, %{node: node_name}) do
lines = alarm_lines(alarms, node_name)
{:ok, Enum.join(lines, Helpers.line_separator())}
end
use RabbitMQ.CLI.DefaultOutput
def help_section(), do: :observability_and_health_checks
def description(), do: "Lists resource alarms (local or cluster-wide) in effect on the target node"
def usage, do: "alarms"
def banner([], %{node: node_name}) do
"Asking node #{node_name} to report any known resource alarms ..."
end
end
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