%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2014. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
-module(disksup_SUITE).
-include_lib("common_test/include/ct.hrl").
%% Test server specific exports
-export([all/0, suite/0]).
-export([init_per_suite/1, end_per_suite/1]).
-export([init_per_testcase/2, end_per_testcase/2]).
%% Test cases
-export([api/1, config/1, alarm/1]).
-export([port/1]).
-export([terminate/1, unavailable/1, restart/1]).
-export([otp_5910/1]).
-export([posix_only/1]).
init_per_suite(Config) when is_list(Config) ->
ok = application:start(os_mon),
Config.
end_per_suite(Config) when is_list(Config) ->
ok = application:stop(os_mon),
Config.
init_per_testcase(unavailable, Config) ->
terminate(Config),
init_per_testcase(dummy, Config);
init_per_testcase(_Case, Config) ->
Config.
end_per_testcase(TC, Config) when TC =:= unavailable;
TC =:= posix_only ->
restart(Config),
end_per_testcase(dummy, Config);
end_per_testcase(_Case, _Config) ->
ok.
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap,{minutes,1}}].
all() ->
Bugs = [otp_5910],
Always = [api, config, alarm, port, posix_only, unavailable] ++ Bugs,
case test_server:os_type() of
{unix, _OSname} -> Always;
{win32, _OSname} -> Always;
_OS -> [unavailable]
end.
%% Test of API functions
api(Config) when is_list(Config) ->
%% get_disk_data()
ok = check_get_disk_data(),
%% get_check_interval()
1800000 = disksup:get_check_interval(),
%% set_check_interval(Minutes)
ok = disksup:set_check_interval(20),
1200000 = disksup:get_check_interval(),
{'EXIT',{badarg,_}} = (catch disksup:set_check_interval(0.5)),
1200000 = disksup:get_check_interval(),
ok = disksup:set_check_interval(30),
%% get_almost_full_threshold()
80 = disksup:get_almost_full_threshold(),
%% set_almost_full_threshold(Float)
ok = disksup:set_almost_full_threshold(0.90),
90 = disksup:get_almost_full_threshold(),
{'EXIT',{badarg,_}} =
(catch disksup:set_almost_full_threshold(-0.5)),
90 = disksup:get_almost_full_threshold(),
ok = disksup:set_almost_full_threshold(0.80),
ok.
%% Test configuration
config(Config) when is_list(Config) ->
%% Change configuration parameters and make sure change is reflected
%% when disksup is restarted
ok = application:set_env(os_mon, disk_space_check_interval, 29),
ok = application:set_env(os_mon, disk_almost_full_threshold, 0.81),
ok = supervisor:terminate_child(os_mon_sup, disksup),
{ok, _Child1} = supervisor:restart_child(os_mon_sup, disksup),
1740000 = disksup:get_check_interval(),
81 = disksup:get_almost_full_threshold(),
%% Also try this with bad parameter values, should be ignored
ok =
application:set_env(os_mon, disk_space_check_interval, 0.5),
ok =
application:set_env(os_mon, disk_almost_full_threshold, -0.81),
ok = supervisor:terminate_child(os_mon_sup, disksup),
{ok, _Child2} = supervisor:restart_child(os_mon_sup, disksup),
1800000 = disksup:get_check_interval(),
80 = disksup:get_almost_full_threshold(),
%% Reset configuration parameters
ok = application:set_env(os_mon, disk_space_check_interval, 30),
ok = application:set_env(os_mon, disk_almost_full_threshold, 0.80),
ok.
%%----------------------------------------------------------------------
%% NOTE: The test case is a bit weak as it will fail if the disk usage
%% changes too much during its course, or if there are timing problems
%% with the alarm_handler receiving the alarms too late
%%----------------------------------------------------------------------
%% Test that alarms are set and cleared
alarm(Config) when is_list(Config) ->
%% Find out how many disks exceed the threshold
%% and make sure the corresponding number of alarms is set
Threshold1 = disksup:get_almost_full_threshold(), % 80
Data1 = disksup:get_disk_data(),
Over1 = over_threshold(Data1, Threshold1),
Alarms1 = get_alarms(),
if
Over1==length(Alarms1) ->
true;
true ->
dump_info(),
ct:fail({bad_alarms, Threshold1, Data1, Alarms1})
end,
%% Try to find a disk with space usage below Threshold1,
%% lower the threshold accordingly and make sure new alarms are set
Fun1 = fun({_Id, _Kbyte, Capacity}) ->
if
Capacity>0, Capacity<Threshold1 -> true;
true -> false
end
end,
case until(Fun1, Data1) of
{_, _, Cap1} ->
Threshold2 = Cap1-1,
ok =
disksup:set_almost_full_threshold(Threshold2/100),
disksup ! timeout, % force a disk check
Data2 = disksup:get_disk_data(),
Over2 = over_threshold(Data2, Threshold2),
Alarms2 = get_alarms(),
if
Over2==length(Alarms2), Over2>Over1 ->
true;
true ->
dump_info(),
ct:fail({bad_alarms, Threshold2, Data2, Alarms2})
end;
false ->
ignore
end,
%% Find out the highest space usage among all disks
%% and try to raise the threshold above this value,
%% make sure all alarms are cleared
Fun2 = fun({_Id, _Kbyte, Capacity}, MaxAcc) ->
if
Capacity>MaxAcc -> Capacity;
true -> MaxAcc
end
end,
case lists:foldl(Fun2, 0, Data1) of
Max when Max<100 ->
Threshold3 = Max+1,
ok = disksup:set_almost_full_threshold(Threshold3/100),
disksup ! timeout, % force a disk check
Data3 = disksup:get_disk_data(),
Over3 = over_threshold(Data3, Threshold3),
Alarms3 = get_alarms(),
if
Over3==0, length(Alarms3)==0 ->
ok;
true ->
dump_info(),
ct:fail({bad_alarms, Threshold3, Data3, Alarms3})
end;
100 ->
ignore
end,
%% Reset threshold
ok = disksup:set_almost_full_threshold(Threshold1/100),
ok.
over_threshold(Data, Threshold) ->
Data2 = remove_duplicated_disks(lists:keysort(1, Data)),
lists:foldl(fun
({_Id, _Kbyte, Cap}, N) when Cap>=Threshold -> N+1;
(_DiskData, N) -> N
end, 0, Data2).
%% On some platforms (for example MontaVista) data for one disk can be
%% "duplicated":
%% Linux ppb 2.4.20_mvl31-pcore680 #1 Sun Feb 1 23:12:56 PST 2004 ppc unknown
%%
%% MontaVista(R) Linux(R) Professional Edition 3.1
%%
%% [ppb:~]> /bin/df -lk
%% Filesystem 1k-blocks Used Available Use% Mounted on
%% rootfs 8066141 3023763 4961717 38% /
%% /dev/root 8066141 3023763 4961717 38% /
%% tmpfs 192892 0 192892 0% /dev/shm
%%
%% disksup:
%% [{"/",8066141,38}, {"/",8066141,38}, {"/dev/shm",192892,0}]
%%
%% disksup will only set ONE alarm for "/".
%% Therefore the list of disk data must be sorted and duplicated disk
%% tuples removed before calculating how many alarms should be set, or
%% the testcase will fail erroneously.
remove_duplicated_disks([{Id, _, _}, {Id, Kbyte, Cap}|T]) ->
remove_duplicated_disks([{Id, Kbyte, Cap}|T]);
remove_duplicated_disks([H|T]) ->
[H|remove_duplicated_disks(T)];
remove_duplicated_disks([]) ->
[].
get_alarms() ->
lists:filter(fun
({{disk_almost_full, _Disk},_}) -> true;
(_) -> false
end, alarm_handler:get_alarms()).
until(Fun, [H|T]) ->
case Fun(H) of
true -> H;
false -> until(Fun, T)
end;
until(_Fun, []) -> false.
%% Test that disksup handles a terminating port program
port(Config) when is_list(Config) ->
Str = os:cmd("ps -ef | grep '[d]isksup'"),
case io_lib:fread("~s ~s", Str) of
{ok, [_Uid,Pid], _Rest} ->
%% Monitor disksup
MonRef = erlang:monitor(process, disksup),
[{_Disk1,Kbyte1,_Cap1}|_] = disksup:get_disk_data(),
true = Kbyte1>0,
%% Kill the port program
case os:cmd("kill -9 " ++ Pid) of
[] ->
%% disksup should now terminate
receive
{'DOWN', MonRef, _, _, {port_died, _Reason}} ->
ok;
{'DOWN', MonRef, _, _, Reason} ->
ct:fail({unexpected_exit_reason, Reason})
after
3000 ->
ct:fail({still_alive, Str})
end,
%% Give os_mon_sup time to restart disksup
ct:sleep({seconds,3}),
[{_Disk2,Kbyte2,_Cap2}|_] = disksup:get_disk_data(),
true = Kbyte2>0,
ok;
Line ->
erlang:demonitor(MonRef),
{skip, {not_killed, Line}}
end;
_ ->
{skip, {os_pid_not_found, Str}}
end.
terminate(Config) when is_list(Config) ->
ok = application:set_env(os_mon, start_disksup, false),
ok = supervisor:terminate_child(os_mon_sup, disksup),
ok.
%% Test correct behaviour when service is unavailable
unavailable(Config) when is_list(Config) ->
%% Make sure all API functions return their dummy values
[{"none",0,0}] = disksup:get_disk_data(),
1800000 = disksup:get_check_interval(),
ok = disksup:set_check_interval(5),
80 = disksup:get_almost_full_threshold(),
ok = disksup:set_almost_full_threshold(0.9),
ok.
restart(Config) when is_list(Config) ->
ok = application:set_env(os_mon, start_disksup, true),
ok = application:set_env(os_mon, disksup_posix_only, false),
case supervisor:restart_child(os_mon_sup, disksup) of
{ok, _Pid} -> ok;
{error, running} -> ok
end.
%% Test that alarms are cleared if disksup crashes or
%% if OS_Mon is stopped
otp_5910(Config) when is_list(Config) ->
%% Make sure disksup sets at least one alarm
Data = lists:sort(disksup:get_disk_data()),
Threshold0 = disksup:get_almost_full_threshold(),
Threshold = case over_threshold(Data, Threshold0) of
0 ->
[{_Id,_Kbyte,Cap}|_] = Data,
io:format("Data ~p Threshold ~p ~n",[Data, Cap-1]),
ok = disksup:set_almost_full_threshold((Cap-1)/100),
Cap-1;
_N -> Threshold0
end,
ok = application:set_env(os_mon, disk_almost_full_threshold, Threshold/100),
disksup ! timeout, % force a disk check
Data2 = disksup:get_disk_data(),
Over = over_threshold(Data2, Threshold),
Alarms = get_alarms(),
if
Over==0 ->
ct:fail({threshold_too_low, Data2, Threshold});
Over==length(Alarms) ->
ok;
true ->
dump_info(),
ct:fail({bad_alarms, Threshold, Data2, Alarms})
end,
%% Kill disksup
exit(whereis(disksup), faked_disksup_crash),
%% Wait a little to make sure disksup has been restarted,
%% then make sure the alarms are set once, but not twice
ct:sleep({seconds,1}),
Data3 = disksup:get_disk_data(),
Alarms2 = get_alarms(),
if
length(Alarms2)==length(Alarms) -> ok;
true ->
dump_info(),
ct:fail({bad_alarms,Threshold,Data3,Alarms,Alarms2})
end,
%% Stop OS_Mon and make sure all disksup alarms are cleared
ok = application:stop(os_mon),
ct:sleep({seconds,1}),
Alarms3 = get_alarms(),
case get_alarms() of
[] -> ok;
_ -> ct:fail({alarms_not_cleared, Alarms3})
end,
%% Reset threshold and restart OS_Mon
ok = application:set_env(os_mon, disksup_almost_full_threshold, 0.8),
ok = disksup:set_almost_full_threshold(0.8),
ok = application:start(os_mon),
ok.
%% Test disksup_posix_only option
posix_only(Config) when is_list(Config) ->
%% Set option and restart disksup
ok = application:set_env(os_mon, disksup_posix_only, true),
ok = supervisor:terminate_child(os_mon_sup, disksup),
{ok, _Child1} = supervisor:restart_child(os_mon_sup, disksup),
ok = check_get_disk_data().
dump_info() ->
io:format("Status: ~p~n", [sys:get_status(disksup)]).
check_get_disk_data() ->
[{Id,KByte,Capacity}|_] = get_disk_data(),
true = io_lib:printable_list(Id),
true = is_integer(KByte),
true = is_integer(Capacity),
true = Capacity>0,
true = KByte>0,
ok.
% filter get_disk_data and remove entriew with zero capacity
% "non-normal" filesystems report zero capacity
% - Perhaps errorneous 'df -k -l'?
% - Always list filesystems by type '-t ufs,zfs,..' instead?
% It is unclear what the intention was from the beginning.
get_disk_data() ->
get_disk_data(disksup:get_disk_data()).
get_disk_data([{"none",0,0}=E]) -> [E];
get_disk_data([{_,_,0}|Es]) -> get_disk_data(Es);
get_disk_data([E|Es]) -> [E|get_disk_data(Es)];
get_disk_data([]) -> [].
