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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.
defmodule RabbitMQ.CLI.Diagnostics.Commands.ResolverInfoCommand do
@moduledoc """
Displays effective hostname resolver (inetrc) configuration on target node
"""
import RabbitMQ.CLI.Core.Platform, only: [line_separator: 0]
import RabbitMQ.CLI.Core.ANSI, only: [bright: 1]
alias RabbitMQ.CLI.Core.Networking
@behaviour RabbitMQ.CLI.CommandBehaviour
def scopes(), do: [:diagnostics]
def switches(), do: [offline: :boolean]
def aliases(), do: []
def merge_defaults(args, opts) do
{args, Map.merge(%{offline: false}, opts)}
end
def validate(args, _) when length(args) > 0, do: {:validation_failure, :too_many_args}
def validate([], _), do: :ok
def run([], %{offline: true}) do
Networking.inetrc_map(:inet.get_rc())
end
def run([], %{node: node_name, timeout: timeout, offline: false}) do
case :rabbit_misc.rpc_call(node_name, :inet, :get_rc, [], timeout) do
{:error, _} = err -> err
{:error, _, _} = err -> err
xs when is_list(xs) -> Networking.inetrc_map(xs)
other -> other
end
end
def output(info, %{node: node_name, formatter: "json"}) do
{:ok,
%{
"result" => "ok",
"node" => node_name,
"resolver" => info
}}
end
def output(info, _opts) do
main_section = [
"#{bright("Runtime Hostname Resolver (inetrc) Settings")}\n",
"Lookup order: #{info["lookup"]}",
"Hosts file: #{info["hosts_file"]}",
"Resolver conf file: #{info["resolv_conf"]}",
"Cache size: #{info["cache_size"]}"
]
hosts_section =
[
"\n#{bright("inetrc File Host Entries")}\n"
] ++
case info["hosts"] do
[] -> ["(none)"]
nil -> ["(none)"]
hs -> Enum.reduce(hs, [], fn {k, v}, acc -> ["#{k} #{Enum.join(v, ", ")}" | acc] end)
end
lines = main_section ++ hosts_section
{:ok, Enum.join(lines, line_separator())}
end
def usage() do
"resolver_info"
end
def help_section(), do: :configuration
def description(),
do: "Displays effective hostname resolver (inetrc) configuration on target node"
def banner(_, %{node: node_name, offline: false}) do
"Asking node #{node_name} for its effective hostname resolver (inetrc) configuration..."
end
def banner(_, %{offline: true}) do
"Displaying effective hostname resolver (inetrc) configuration used by CLI tools..."
end
end
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