pkg/controller/deployment/util/hash_test.go - master - githubmirror/kubernetes

pkg/controller/deployment/util/hash_test.go
144 строки4 KB
Jordan Liggitt
Drop null creationTimestamp from test fixtures
02 май 2025, 22:38
02 май 2025, 22:386bb6c99
/*
Copyright 2016 The Kubernetes Authors.

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 util

import (
	"encoding/json"
	"hash/adler32"
	"strconv"
	"strings"
	"testing"

	v1 "k8s.io/api/core/v1"
	"k8s.io/kubernetes/pkg/controller"
	hashutil "k8s.io/kubernetes/pkg/util/hash"
)

var podSpec = `
{
    "metadata": {
        "labels": {
            "app": "cats"
        }
    },
    "spec": {
        "containers": [
            {
                "name": "cats",
                "image": "registry/test/cats:v0.@@VERSION@@.0",
                "ports": [
                    {
                        "name": "http",
                        "containerPort": 9077,
                        "protocol": "TCP"
                    }
                ],
                "env": [
                    {
                        "name": "DEPLOYMENT_ENVIRONMENT",
                        "value": "cats-stubbed-functional"
                    },
                    {
                        "name": "APP_NAME",
                        "value": "cats"
                    }
                ],
                "resources": {
                    "limits": {
                        "cpu": "1",
                        "memory": "1Gi"
                    },
                    "requests": {
                        "cpu": "1",
                        "memory": "1Gi"
                    }
                },
                "livenessProbe": {
                    "httpGet": {
                        "path": "/private/status",
                        "port": 9077,
                        "scheme": "HTTP"
                    },
                    "initialDelaySeconds": 30,
                    "timeoutSeconds": 1,
                    "periodSeconds": 10,
                    "successThreshold": 1,
                    "failureThreshold": 3
                },
                "readinessProbe": {
                    "httpGet": {
                        "path": "/private/status",
                        "port": 9077,
                        "scheme": "HTTP"
                    },
                    "initialDelaySeconds": 1,
                    "timeoutSeconds": 1,
                    "periodSeconds": 10,
                    "successThreshold": 1,
                    "failureThreshold": 3
                },
                "terminationMessagePath": "/dev/termination-log",
                "imagePullPolicy": "IfNotPresent"
            }
        ],
        "restartPolicy": "Always",
        "terminationGracePeriodSeconds": 30,
        "dnsPolicy": "ClusterFirst",
        "securityContext": {}
    }
}
`

func TestPodTemplateSpecHash(t *testing.T) {
	seenHashes := make(map[string]int)

	for i := 0; i < 1000; i++ {
		specJSON := strings.Replace(podSpec, "@@VERSION@@", strconv.Itoa(i), 1)
		spec := v1.PodTemplateSpec{}
		json.Unmarshal([]byte(specJSON), &spec)
		hash := controller.ComputeHash(&spec, nil)
		if v, ok := seenHashes[hash]; ok {
			t.Errorf("Hash collision, old: %d new: %d", v, i)
			break
		}
		seenHashes[hash] = i
	}
}

func BenchmarkAdler(b *testing.B) {
	spec := v1.PodTemplateSpec{}
	json.Unmarshal([]byte(podSpec), &spec)

	for i := 0; i < b.N; i++ {
		getPodTemplateSpecOldHash(spec)
	}
}

func getPodTemplateSpecOldHash(template v1.PodTemplateSpec) uint32 {
	podTemplateSpecHasher := adler32.New()
	hashutil.DeepHashObject(podTemplateSpecHasher, template)
	return podTemplateSpecHasher.Sum32()
}

func BenchmarkFnv(b *testing.B) {
	spec := v1.PodTemplateSpec{}
	json.Unmarshal([]byte(podSpec), &spec)

	for i := 0; i < b.N; i++ {
		controller.ComputeHash(&spec, nil)
	}
}