1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
%% 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.
%%
-module(rabbit_nodes).
-export([names/1, diagnostics/1, make/1, make/2, parts/1, cookie_hash/0,
is_running/2, is_process_running/2,
cluster_name/0, set_cluster_name/1, set_cluster_name/2, ensure_epmd/0,
all_running/0, name_type/0, running_count/0, total_count/0,
await_running_count/2, is_single_node_cluster/0,
boot/0]).
-export([persistent_cluster_id/0, seed_internal_cluster_id/0, seed_user_provided_cluster_name/0]).
-include_lib("kernel/include/inet.hrl").
-include_lib("rabbit_common/include/rabbit.hrl").
-define(SAMPLING_INTERVAL, 1000).
-define(INTERNAL_CLUSTER_ID_PARAM_NAME, internal_cluster_id).
%%----------------------------------------------------------------------------
%% API
%%----------------------------------------------------------------------------
boot() ->
seed_internal_cluster_id(),
seed_user_provided_cluster_name().
name_type() ->
#{nodename_type := NodeType} = rabbit_prelaunch:get_context(),
NodeType.
-spec names(string()) ->
rabbit_types:ok_or_error2([{string(), integer()}], term()).
names(Hostname) ->
rabbit_nodes_common:names(Hostname).
-spec diagnostics([node()]) -> string().
diagnostics(Nodes) ->
rabbit_nodes_common:diagnostics(Nodes).
make(NameOrParts) ->
rabbit_nodes_common:make(NameOrParts).
make(ShortName, Hostname) ->
make({ShortName, Hostname}).
parts(NodeStr) ->
rabbit_nodes_common:parts(NodeStr).
-spec cookie_hash() -> string().
cookie_hash() ->
rabbit_nodes_common:cookie_hash().
-spec is_running(node(), atom()) -> boolean().
is_running(Node, Application) ->
rabbit_nodes_common:is_running(Node, Application).
-spec is_process_running(node(), atom()) -> boolean().
is_process_running(Node, Process) ->
rabbit_nodes_common:is_process_running(Node, Process).
-spec cluster_name() -> binary().
cluster_name() ->
rabbit_runtime_parameters:value_global(
cluster_name, cluster_name_default()).
cluster_name_default() ->
{ID, _} = parts(node()),
FQDN = rabbit_net:hostname(),
list_to_binary(atom_to_list(make({ID, FQDN}))).
-spec persistent_cluster_id() -> binary().
persistent_cluster_id() ->
case rabbit_runtime_parameters:lookup_global(?INTERNAL_CLUSTER_ID_PARAM_NAME) of
not_found ->
seed_internal_cluster_id(),
persistent_cluster_id();
Param ->
#{value := Val, name := ?INTERNAL_CLUSTER_ID_PARAM_NAME} = maps:from_list(Param),
Val
end.
-spec seed_internal_cluster_id() -> binary().
seed_internal_cluster_id() ->
case rabbit_runtime_parameters:lookup_global(?INTERNAL_CLUSTER_ID_PARAM_NAME) of
not_found ->
Id = rabbit_guid:binary(rabbit_guid:gen(), "rabbitmq-cluster-id"),
rabbit_log:info("Initialising internal cluster ID to '~s'", [Id]),
rabbit_runtime_parameters:set_global(?INTERNAL_CLUSTER_ID_PARAM_NAME, Id, ?INTERNAL_USER),
Id;
Param ->
#{value := Val, name := ?INTERNAL_CLUSTER_ID_PARAM_NAME} = maps:from_list(Param),
Val
end.
seed_user_provided_cluster_name() ->
case application:get_env(rabbit, cluster_name) of
undefined -> ok;
{ok, Name} ->
rabbit_log:info("Setting cluster name to '~s' as configured", [Name]),
set_cluster_name(rabbit_data_coercion:to_binary(Name))
end.
-spec set_cluster_name(binary()) -> 'ok'.
set_cluster_name(Name) ->
set_cluster_name(Name, ?INTERNAL_USER).
-spec set_cluster_name(binary(), rabbit_types:username()) -> 'ok'.
set_cluster_name(Name, Username) ->
%% Cluster name should be binary
BinaryName = rabbit_data_coercion:to_binary(Name),
rabbit_runtime_parameters:set_global(cluster_name, BinaryName, Username).
ensure_epmd() ->
rabbit_nodes_common:ensure_epmd().
-spec all_running() -> [node()].
all_running() -> rabbit_mnesia:cluster_nodes(running).
-spec running_count() -> integer().
running_count() -> length(all_running()).
-spec total_count() -> integer().
total_count() -> length(rabbit_mnesia:cluster_nodes(all)).
-spec is_single_node_cluster() -> boolean().
is_single_node_cluster() ->
total_count() =:= 1.
-spec await_running_count(integer(), integer()) -> 'ok' | {'error', atom()}.
await_running_count(TargetCount, Timeout) ->
Retries = round(Timeout/?SAMPLING_INTERVAL),
await_running_count_with_retries(TargetCount, Retries).
await_running_count_with_retries(1, _Retries) -> ok;
await_running_count_with_retries(_TargetCount, Retries) when Retries =:= 0 ->
{error, timeout};
await_running_count_with_retries(TargetCount, Retries) ->
case running_count() >= TargetCount of
true -> ok;
false ->
timer:sleep(?SAMPLING_INTERVAL),
await_running_count_with_retries(TargetCount, Retries - 1)
end.
|
