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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) 2007-2020 VMware, Inc. or its affiliates. All rights reserved.
defmodule RabbitMQ.CLI.Ctl.Commands.ShutdownCommand do
@behaviour RabbitMQ.CLI.CommandBehaviour
alias RabbitMQ.CLI.Core.{OsPid, NodeName}
def switches() do
[timeout: :integer,
wait: :boolean]
end
def aliases(), do: [timeout: :t]
def merge_defaults(args, opts) do
{args, Map.merge(%{wait: true, timeout: 120}, opts)}
end
def validate([], %{wait: false}) do
:ok
end
def validate([], %{node: node_name, wait: true}) do
local_hostname = NodeName.hostname_from_node(Node.self())
remote_hostname = NodeName.hostname_from_node(node_name)
case addressing_local_node?(local_hostname, remote_hostname) do
true -> :ok;
false ->
msg = "\nThis command can only --wait for shutdown of local nodes " <>
"but node #{node_name} seems to be remote " <>
"(local hostname: #{local_hostname}, remote: #{remote_hostname}).\n" <>
"Pass --no-wait to shut node #{node_name} down without waiting.\n"
{:validation_failure, {:unsupported_target, msg}}
end
end
use RabbitMQ.CLI.Core.AcceptsNoPositionalArguments
def run([], %{node: node_name, wait: false, timeout: timeout}) do
shut_down_node_without_waiting(node_name, timeout)
end
def run([], %{node: node_name, wait: true, timeout: timeout}) do
case :rabbit_misc.rpc_call(node_name, :os, :getpid, []) do
pid when is_list(pid) ->
shut_down_node_and_wait_pid_to_stop(node_name, pid, timeout)
other ->
other
end
end
use RabbitMQ.CLI.DefaultOutput
def usage, do: "shutdown [--wait]"
def usage_additional() do
[
["--wait", "if set, will wait for target node to terminate (by inferring and monitoring its PID file). Only works for local nodes."],
["--no-wait", "if set, will not wait for target node to terminate"]
]
end
def help_section(), do: :node_management
def description(), do: "Stops RabbitMQ and its runtime (Erlang VM). Monitors progress for local nodes. Does not require a PID file path."
def banner(_, _), do: nil
#
# Implementation
#
def addressing_local_node?(_, remote_hostname) when remote_hostname == :localhost , do: :true
def addressing_local_node?(_, remote_hostname) when remote_hostname == 'localhost', do: :true
def addressing_local_node?(_, remote_hostname) when remote_hostname == "localhost", do: :true
def addressing_local_node?(local_hostname, remote_hostname) do
local_hostname == remote_hostname
end
defp shut_down_node_without_waiting(node_name, timeout) do
:rabbit_misc.rpc_call(node_name, :rabbit, :stop_and_halt, [], timeout)
end
defp shut_down_node_and_wait_pid_to_stop(node_name, pid, timeout) do
{:stream,
RabbitMQ.CLI.Core.Helpers.stream_until_error([
fn -> "Shutting down RabbitMQ node #{node_name} running at PID #{pid}" end,
fn ->
res = shut_down_node_without_waiting(node_name, timeout)
case res do
:ok -> "Waiting for PID #{pid} to terminate"
{:badrpc, err} -> {:error, err}
{:error, _} = err -> err
end
end,
fn ->
OsPid.wait_for_os_process_death(pid)
"RabbitMQ node #{node_name} running at PID #{pid} successfully shut down"
end
])}
end
end
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