mirror of
https://github.com/prometheus-operator/prometheus-operator.git
synced 2025-04-16 09:16:38 +00:00
81 lines
2.7 KiB
Go
81 lines
2.7 KiB
Go
// Copyright 2016 The prometheus-operator Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package prometheus
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import (
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"strings"
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"testing"
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monitoringv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
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v1 "k8s.io/api/core/v1"
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)
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func TestMakeRulesConfigMaps(t *testing.T) {
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t.Run("ShouldReturnAtLeastOneConfigMap", shouldReturnAtLeastOneConfigMap)
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t.Run("ShouldErrorOnTooLargeRuleFile", shouldErrorOnTooLargeRuleFile)
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t.Run("ShouldSplitUpLargeSmallIntoTwo", shouldSplitUpLargeSmallIntoTwo)
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}
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// makeRulesConfigMaps should return at least one ConfigMap even if it is empty
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// when there are no rules. Otherwise adding a rule to a Prometheus without rules
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// would change the statefulset definition and thereby force Prometheus to
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// restart.
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func shouldReturnAtLeastOneConfigMap(t *testing.T) {
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p := &monitoringv1.Prometheus{}
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ruleFiles := map[string]string{}
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configMaps, err := makeRulesConfigMaps(p, ruleFiles)
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if err != nil {
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t.Fatalf("expected no error but got: %v", err.Error())
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}
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if len(configMaps) != 1 {
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t.Fatalf("expected one ConfigMaps but got %v", len(configMaps))
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}
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}
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func shouldErrorOnTooLargeRuleFile(t *testing.T) {
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expectedError := "rule file 'my-rule-file' is too large for a single Kubernetes ConfigMap"
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p := &monitoringv1.Prometheus{}
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ruleFiles := map[string]string{}
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ruleFiles["my-rule-file"] = strings.Repeat("a", v1.MaxSecretSize+1)
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_, err := makeRulesConfigMaps(p, ruleFiles)
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if err == nil || err.Error() != expectedError {
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t.Fatalf("expected makeRulesConfigMaps to return error '%v' but got '%v'", expectedError, err)
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}
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}
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func shouldSplitUpLargeSmallIntoTwo(t *testing.T) {
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p := &monitoringv1.Prometheus{}
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ruleFiles := map[string]string{}
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ruleFiles["first"] = strings.Repeat("a", maxConfigMapDataSize)
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ruleFiles["second"] = "a"
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configMaps, err := makeRulesConfigMaps(p, ruleFiles)
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if err != nil {
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t.Fatalf("expected no error but got: %v", err)
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}
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if len(configMaps) != 2 {
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t.Fatalf("expected rule files to be split up into two ConfigMaps, but got '%v' instead", len(configMaps))
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}
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if configMaps[0].Data["first"] != ruleFiles["first"] || configMaps[1].Data["second"] != ruleFiles["second"] {
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t.Fatal("expected ConfigMap data to match rule file content")
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}
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}
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