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% 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.
-module(couch_prometheus_e2e_tests).
-include_lib("couch/include/couch_eunit.hrl").
-include_lib("couch/include/couch_db.hrl").
-define(USER, "prometheus_test_admin").
-define(PASS, "pass").
-define(AUTH, {basic_auth, {?USER, ?PASS}}).
-define(PROM_PORT, "17986").
-define(CONTENT_JSON, {"Content-Type", "application/json"}).
start() ->
test_util:start_couch([chttpd, couch_prometheus]).
setup() ->
Hashed = couch_passwords:hash_admin_password(?PASS),
ok = config:set("admins", ?USER, ?b2l(Hashed), _Persist=false),
ok = config:set_integer("stats", "interval", 2),
ok = config:set_integer("couch_prometheus", "interval", 1),
Port = mochiweb_socket_server:get(chttpd, port),
construct_url(Port).
teardown(_) ->
ok.
couch_prometheus_e2e_test_() ->
{
"Prometheus E2E Tests",
{
setup,
fun start/0, fun test_util:stop_couch/1,
{
foreach,
fun setup/0, fun teardown/1,
[
fun node_call_chttpd/1,
fun node_call_prometheus_http/1,
fun deny_prometheus_http/1,
fun node_see_updated_metrics/1
]
}
}
}.
% normal chttpd path via cluster port
node_call_chttpd(Url) ->
{ok, RC1, _, _} = test_request:get(
Url,
[?CONTENT_JSON, ?AUTH],
[]
),
?_assertEqual(200, RC1).
% normal chttpd path via cluster port
node_see_updated_metrics(Url) ->
TmpDb = ?tempdb(),
Addr = config:get("chttpd", "bind_address", "127.0.0.1"),
Port = mochiweb_socket_server:get(chttpd, port),
DbUrl = lists:concat(["http://", Addr, ":", Port, "/", ?b2l(TmpDb)]),
create_db(DbUrl),
[create_doc(DbUrl, "testdoc" ++ integer_to_binary(I)) || I <- lists:seq(1, 100)],
delete_db(DbUrl),
InitMetrics = wait_for_metrics(Url, "couchdb_httpd_requests_total 0", 5000),
UpdatedMetrics = wait_for_metrics(Url, "couchdb_httpd_requests_total", 10000),
% since the puts happen so fast, we can't have an exact
% total requests given the scraping interval. so we just want to acknowledge
% a change as occurred
?_assertNotEqual(InitMetrics, UpdatedMetrics).
% normal chttpd path via cluster port
node_call_prometheus_http(_) ->
maybe_start_http_server("true"),
Url = construct_url(?PROM_PORT),
{ok, RC1, _, _} = test_request:get(
Url,
[?CONTENT_JSON, ?AUTH],
[]
),
% since this port doesn't require auth, this should work
{ok, RC2, _, _} = test_request:get(
Url,
[?CONTENT_JSON],
[]
),
delete_db(Url),
?_assertEqual(200, RC2).
% we don't start the http server
deny_prometheus_http(_) ->
maybe_start_http_server("false"),
Url = construct_url(?PROM_PORT),
Response = test_request:get(
Url,
[?CONTENT_JSON, ?AUTH],
[]
),
?_assertEqual({error,{conn_failed,{error,econnrefused}}}, Response).
maybe_start_http_server(Additional) ->
test_util:stop_applications([couch_prometheus, chttpd]),
Hashed = couch_passwords:hash_admin_password(?PASS),
ok = config:set("admins", ?USER, ?b2l(Hashed), _Persist=false),
ok = config:set("prometheus", "additional_port", Additional),
ok = config:set("prometheus", "port", ?PROM_PORT),
test_util:start_applications([couch_prometheus, chttpd]).
construct_url(Port) ->
Addr = config:get("chttpd", "bind_address", "127.0.0.1"),
lists:concat(["http://", Addr, ":", Port, "/_node/_local/_prometheus"]).
create_db(Url) ->
Addr = config:get("chttpd", "bind_address", "127.0.0.1"),
Port = mochiweb_socket_server:get(chttpd, port),
{ok, Status, _, _} = test_request:put(Url, [?CONTENT_JSON, ?AUTH], "{}"),
?assert(Status =:= 201 orelse Status =:= 202).
delete_db(Url) ->
{ok, 200, _, _} = test_request:delete(Url, [?AUTH]).
create_doc(Url, Id) ->
test_request:put(Url ++ "/" ++ Id,
[?CONTENT_JSON, ?AUTH], "{\"mr\": \"rockoartischocko\"}").
wait_for_metrics(Url, Value, Timeout) ->
test_util:wait(fun() ->
{ok, _, _, Body} = test_request:get(
Url,
[?CONTENT_JSON, ?AUTH],
[]
),
case string:find(Body, Value) of
nomatch -> wait;
M -> M
end
end, Timeout).
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