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monitoringcomponent.go
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/
monitoringcomponent.go
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// Copyright (c) 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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.
package test
import (
"bytes"
"io/ioutil"
"os"
"os/exec"
"github.com/gardener/gardener/pkg/operation/botanist/component"
. "github.com/onsi/gomega"
)
// ScrapeConfigs is a utility test function for MonitoringComponents in order to test the scape configurations.
func ScrapeConfigs(c component.MonitoringComponent, expectedScrapeConfig string) {
scrapeConfigs, err := c.ScrapeConfigs()
Expect(err).NotTo(HaveOccurred())
Expect(scrapeConfigs).To(ConsistOf(Equal(expectedScrapeConfig)))
}
// AlertingRules is a utility test function for MonitoringComponents in order to test the alerting rules.
func AlertingRules(c component.MonitoringComponent, expectedAlertingRules map[string]string) {
alertingRules, err := c.AlertingRules()
Expect(err).NotTo(HaveOccurred())
Expect(alertingRules).To(HaveLen(len(expectedAlertingRules)))
for filename, rule := range expectedAlertingRules {
Expect(alertingRules).To(HaveKeyWithValue(filename, rule))
}
}
// ExecutePromtool execute the promtool tests for the alerting rules.
func ExecutePromtool(c component.MonitoringComponent, filenameRulesTest string) {
alertingRules, err := c.AlertingRules()
Expect(err).NotTo(HaveOccurred())
for filename, rule := range alertingRules {
Expect(ioutil.WriteFile(filename, []byte(rule), 0644)).To(Succeed())
var errBuf bytes.Buffer
cmd := exec.Command("promtool", "test", "rules", filenameRulesTest)
cmd.Stderr = &errBuf
Expect(cmd.Run()).To(Succeed(), errBuf.String())
Expect(os.Remove(filename)).To(Succeed())
}
}
// AlertingRulesWithPromtool tests the alerting rules and execute promtool tests.
func AlertingRulesWithPromtool(c component.MonitoringComponent, expectedAlertingRules map[string]string, filenameRulesTest string) {
AlertingRules(c, expectedAlertingRules)
ExecutePromtool(c, filenameRulesTest)
}