498b06fbe2
Sometimes we want to detect the hotspot of a cluster, for example, hot scanned tablet, hot wrote tablet, but we have no insight about tablets in the cluster. This patch introduce tablet level metrics to help to achieve this object, now support 4 metrics on tablets: `query_scan_bytes `, `query_scan_rows `, `flush_bytes `, `flush_count `. However, one BE may holds hundreds of thousands of tablets, so I add a parameter for the metrics HTTP request, and not return tablet level metrics by default.
103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#include "http/action/metrics_action.h"
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#include <gtest/gtest.h>
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#include "http/http_request.h"
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#include "http/http_response.h"
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#include "http/http_channel.h"
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#include "util/metrics.h"
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namespace doris {
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// Mock part
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const char* s_expect_response = nullptr;
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void HttpChannel::send_reply(
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HttpRequest* request, HttpStatus status, const std::string& content) {
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ASSERT_STREQ(s_expect_response, content.c_str());
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}
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class MetricsActionTest : public testing::Test {
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public:
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MetricsActionTest() { }
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virtual ~MetricsActionTest() {
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}
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void SetUp() override {
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_evhttp_req = evhttp_request_new(nullptr, nullptr);
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}
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void TearDown() override {
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if (_evhttp_req != nullptr) {
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evhttp_request_free(_evhttp_req);
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}
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}
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private:
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evhttp_request* _evhttp_req = nullptr;
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};
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TEST_F(MetricsActionTest, prometheus_output) {
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MetricRegistry metric_registry("test");
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std::shared_ptr<MetricEntity> entity = metric_registry.register_entity("metrics_action_test.prometheus_output");
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IntGauge* cpu_idle = nullptr;
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DEFINE_GAUGE_METRIC_PROTOTYPE_5ARG(cpu_idle, MetricUnit::PERCENT);
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INT_GAUGE_METRIC_REGISTER(entity, cpu_idle);
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IntCounter* put_requests_total = nullptr;
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DEFINE_COUNTER_METRIC_PROTOTYPE_5ARG(put_requests_total, MetricUnit::NOUNIT, "", requests_total, Labels({{"type", "put"}, {"path", "/sports"}}));
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INT_COUNTER_METRIC_REGISTER(entity, put_requests_total);
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cpu_idle->set_value(50);
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put_requests_total->increment(2345);
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s_expect_response =
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"# TYPE test_cpu_idle gauge\n"
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"test_cpu_idle 50\n"
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"# TYPE test_requests_total counter\n"
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"test_requests_total{path=\"/sports\",type=\"put\"} 2345\n";
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HttpRequest request(_evhttp_req);
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MetricsAction action(&metric_registry);
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action.handle(&request);
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}
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TEST_F(MetricsActionTest, prometheus_no_prefix) {
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MetricRegistry metric_registry("");
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std::shared_ptr<MetricEntity> entity = metric_registry.register_entity("metrics_action_test.prometheus_no_prefix");
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IntGauge* cpu_idle = nullptr;
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DEFINE_GAUGE_METRIC_PROTOTYPE_5ARG(cpu_idle, MetricUnit::PERCENT);
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INT_GAUGE_METRIC_REGISTER(entity, cpu_idle);
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cpu_idle->set_value(50);
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s_expect_response =
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"# TYPE cpu_idle gauge\n"
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"cpu_idle 50\n";
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HttpRequest request(_evhttp_req);
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MetricsAction action(&metric_registry);
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action.handle(&request);
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}
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}
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int main(int argc, char** argv) {
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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