| 1 |
|
-module(mongoose_cleaner). |
| 2 |
|
|
| 3 |
|
-behaviour(gen_server). |
| 4 |
|
|
| 5 |
|
%% API |
| 6 |
|
-export([start_link/0]). |
| 7 |
|
|
| 8 |
|
%% gen_server callbacks |
| 9 |
|
-export([init/1, |
| 10 |
|
handle_call/3, |
| 11 |
|
handle_cast/2, |
| 12 |
|
handle_info/2, |
| 13 |
|
terminate/2, |
| 14 |
|
code_change/3]). |
| 15 |
|
|
| 16 |
|
-ignore_xref([start_link/0]). |
| 17 |
|
|
| 18 |
|
-include("mongoose.hrl"). |
| 19 |
|
|
| 20 |
|
-define(NODE_CLEANUP_LOCK(Node), {node_cleanup_lock, Node}). |
| 21 |
|
-define(SERVER, ?MODULE). |
| 22 |
|
|
| 23 |
|
-record(state, {}). |
| 24 |
|
|
| 25 |
|
%%%=================================================================== |
| 26 |
|
%%% API |
| 27 |
|
%%%=================================================================== |
| 28 |
|
|
| 29 |
|
start_link() -> |
| 30 |
101 |
gen_server:start_link({local, ?SERVER}, ?MODULE, [], []). |
| 31 |
|
|
| 32 |
|
%%%=================================================================== |
| 33 |
|
%%% gen_server callbacks |
| 34 |
|
%%%=================================================================== |
| 35 |
|
|
| 36 |
|
init([]) -> |
| 37 |
101 |
case net_kernel:monitor_nodes(true) of |
| 38 |
|
ok -> |
| 39 |
101 |
{ok, #state{}}; |
| 40 |
|
Error -> |
| 41 |
:-( |
?LOG_ERROR(#{what => cleaner_monitor_failed, |
| 42 |
|
text => <<"mongoose_cleaner failed to monitor nodes">>, |
| 43 |
:-( |
reason => Error}), |
| 44 |
:-( |
{stop, Error} |
| 45 |
|
end. |
| 46 |
|
|
| 47 |
|
handle_call(_Request, _From, State) -> |
| 48 |
:-( |
Reply = ok, |
| 49 |
:-( |
{reply, Reply, State}. |
| 50 |
|
|
| 51 |
|
handle_cast(_Msg, State) -> |
| 52 |
:-( |
{noreply, State}. |
| 53 |
|
|
| 54 |
|
handle_info({nodedown, Node}, State) -> |
| 55 |
8 |
?LOG_WARNING(#{what => cleaner_nodedown, |
| 56 |
|
text => <<"mongoose_cleaner received nodenown event">>, |
| 57 |
:-( |
down_node => Node}), |
| 58 |
8 |
cleanup_modules(Node), |
| 59 |
8 |
{noreply, State}; |
| 60 |
|
handle_info(_Info, State) -> |
| 61 |
14 |
{noreply, State}. |
| 62 |
|
|
| 63 |
|
terminate(_Reason, _State) -> |
| 64 |
:-( |
ok. |
| 65 |
|
|
| 66 |
|
code_change(_OldVsn, State, _Extra) -> |
| 67 |
:-( |
{ok, State}. |
| 68 |
|
|
| 69 |
|
%%%=================================================================== |
| 70 |
|
%%% Internal functions |
| 71 |
|
%%%=================================================================== |
| 72 |
|
|
| 73 |
|
cleanup_modules(Node) -> |
| 74 |
8 |
LockKey = ?NODE_CLEANUP_LOCK(Node), |
| 75 |
8 |
LockRequest = {LockKey, self()}, |
| 76 |
8 |
C = fun () -> run_node_cleanup(Node) end, |
| 77 |
8 |
Nodes = [node() | nodes()], |
| 78 |
8 |
Retries = 1, |
| 79 |
8 |
case global:trans(LockRequest, C, Nodes, Retries) of |
| 80 |
|
aborted -> |
| 81 |
:-( |
?LOG_INFO(#{what => cleaner_trans_aborted, |
| 82 |
|
text => <<"mongoose_cleaner failed to get global lock">>, |
| 83 |
:-( |
lock_key => LockKey}), |
| 84 |
:-( |
{ok, aborted}; |
| 85 |
|
Result -> |
| 86 |
8 |
{ok, Result} |
| 87 |
|
end. |
| 88 |
|
|
| 89 |
|
run_node_cleanup(Node) -> |
| 90 |
8 |
{Elapsed, RetVal} = timer:tc(fun() -> |
| 91 |
8 |
mongoose_hooks:node_cleanup(Node), |
| 92 |
8 |
[mongoose_hooks:node_cleanup_for_host_type(HostType, Node) || HostType <- ?ALL_HOST_TYPES], |
| 93 |
8 |
ok |
| 94 |
|
end), |
| 95 |
8 |
?LOG_NOTICE(#{what => cleaner_done, |
| 96 |
|
text => <<"Finished cleaning after dead node">>, |
| 97 |
|
duration => erlang:round(Elapsed / 1000), |
| 98 |
8 |
down_node => Node, result => RetVal}), |
| 99 |
8 |
RetVal. |