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https://github.com/DullJZ/s3-balance.git
synced 2026-09-05 15:56:39 +08:00
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DullJZ
@@ -0,0 +1,310 @@
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package bucket
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import (
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"context"
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"fmt"
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"sync"
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"time"
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"github.com/DullJZ/s3-balance/internal/config"
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"github.com/aws/aws-sdk-go-v2/aws"
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awsconfig "github.com/aws/aws-sdk-go-v2/config"
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"github.com/aws/aws-sdk-go-v2/credentials"
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"github.com/aws/aws-sdk-go-v2/service/s3"
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)
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// BucketInfo 存储桶信息
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type BucketInfo struct {
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Config config.BucketConfig
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Client *s3.Client
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UsedSize int64 // 已使用容量（字节）
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Available bool // 是否可用
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LastChecked time.Time // 最后检查时间
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mu sync.RWMutex
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}
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// Manager 存储桶管理器
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type Manager struct {
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buckets map[string]*BucketInfo
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mu sync.RWMutex
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config *config.Config
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stopChan chan struct{}
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}
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// NewManager 创建新的存储桶管理器
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func NewManager(cfg *config.Config) (*Manager, error) {
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m := &Manager{
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buckets: make(map[string]*BucketInfo),
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config: cfg,
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stopChan: make(chan struct{}),
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}
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// 初始化所有存储桶客户端
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for _, bucketCfg := range cfg.Buckets {
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if !bucketCfg.Enabled {
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continue
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}
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client, err := createS3Client(bucketCfg)
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if err != nil {
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return nil, fmt.Errorf("failed to create S3 client for bucket %s: %w", bucketCfg.Name, err)
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}
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info := &BucketInfo{
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Config: bucketCfg,
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Client: client,
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Available: true,
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LastChecked: time.Now(),
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}
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m.buckets[bucketCfg.Name] = info
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}
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return m, nil
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}
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// createS3Client 创建S3客户端
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func createS3Client(bucketCfg config.BucketConfig) (*s3.Client, error) {
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// 创建自定义端点解析器
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customResolver := aws.EndpointResolverWithOptionsFunc(func(service, region string, options ...interface{}) (aws.Endpoint, error) {
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if bucketCfg.Endpoint != "" {
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return aws.Endpoint{
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URL: bucketCfg.Endpoint,
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SigningRegion: bucketCfg.Region,
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HostnameImmutable: true,
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}, nil
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}
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// 返回错误以使用默认解析器
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return aws.Endpoint{}, &aws.EndpointNotFoundError{}
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})
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// 配置AWS SDK
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cfg, err := awsconfig.LoadDefaultConfig(context.TODO(),
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awsconfig.WithRegion(bucketCfg.Region),
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awsconfig.WithEndpointResolverWithOptions(customResolver),
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awsconfig.WithCredentialsProvider(
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credentials.NewStaticCredentialsProvider(
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bucketCfg.AccessKeyID,
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bucketCfg.SecretAccessKey,
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"",
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),
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),
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)
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if err != nil {
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return nil, err
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}
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// 创建S3客户端
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client := s3.NewFromConfig(cfg, func(o *s3.Options) {
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o.UsePathStyle = bucketCfg.PathStyle
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})
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return client, nil
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}
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// Start 启动管理器（健康检查和统计更新）
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func (m *Manager) Start(ctx context.Context) {
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// 启动健康检查
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go m.healthCheckLoop(ctx)
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// 启动统计更新
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go m.statsUpdateLoop(ctx)
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}
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// Stop 停止管理器
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func (m *Manager) Stop() {
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close(m.stopChan)
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}
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// healthCheckLoop 健康检查循环
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func (m *Manager) healthCheckLoop(ctx context.Context) {
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ticker := time.NewTicker(m.config.Balancer.HealthCheckPeriod)
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defer ticker.Stop()
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for {
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select {
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case <-ctx.Done():
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return
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case <-m.stopChan:
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return
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case <-ticker.C:
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m.checkAllBuckets(ctx)
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}
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}
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}
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// statsUpdateLoop 统计更新循环
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func (m *Manager) statsUpdateLoop(ctx context.Context) {
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ticker := time.NewTicker(m.config.Balancer.UpdateStatsPeriod)
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defer ticker.Stop()
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for {
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select {
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case <-ctx.Done():
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return
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case <-m.stopChan:
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return
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case <-ticker.C:
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m.updateAllStats(ctx)
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}
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}
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}
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// checkAllBuckets 检查所有存储桶的健康状态
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func (m *Manager) checkAllBuckets(ctx context.Context) {
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m.mu.RLock()
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buckets := make([]*BucketInfo, 0, len(m.buckets))
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for _, b := range m.buckets {
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buckets = append(buckets, b)
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}
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m.mu.RUnlock()
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var wg sync.WaitGroup
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for _, bucket := range buckets {
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wg.Add(1)
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go func(b *BucketInfo) {
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defer wg.Done()
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m.checkBucket(ctx, b)
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}(bucket)
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}
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wg.Wait()
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}
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// checkBucket 检查单个存储桶
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func (m *Manager) checkBucket(ctx context.Context, bucket *BucketInfo) {
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ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
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defer cancel()
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// 尝试列出存储桶（用于健康检查）
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_, err := bucket.Client.ListObjectsV2(ctx, &s3.ListObjectsV2Input{
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Bucket: aws.String(bucket.Config.Name),
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MaxKeys: aws.Int32(1),
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})
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bucket.mu.Lock()
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bucket.Available = err == nil
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bucket.LastChecked = time.Now()
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bucket.mu.Unlock()
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}
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// updateAllStats 更新所有存储桶的统计信息
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func (m *Manager) updateAllStats(ctx context.Context) {
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m.mu.RLock()
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buckets := make([]*BucketInfo, 0, len(m.buckets))
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for _, b := range m.buckets {
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buckets = append(buckets, b)
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}
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m.mu.RUnlock()
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var wg sync.WaitGroup
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for _, bucket := range buckets {
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wg.Add(1)
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go func(b *BucketInfo) {
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defer wg.Done()
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m.updateBucketStats(ctx, b)
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}(bucket)
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}
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wg.Wait()
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}
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// updateBucketStats 更新单个存储桶的统计信息
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func (m *Manager) updateBucketStats(ctx context.Context, bucket *BucketInfo) {
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ctx, cancel := context.WithTimeout(ctx, 30*time.Second)
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defer cancel()
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var totalSize int64
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var continuationToken *string
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for {
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output, err := bucket.Client.ListObjectsV2(ctx, &s3.ListObjectsV2Input{
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Bucket: aws.String(bucket.Config.Name),
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ContinuationToken: continuationToken,
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})
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if err != nil {
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break
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}
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for _, obj := range output.Contents {
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if obj.Size != nil {
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totalSize += *obj.Size
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}
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}
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if output.IsTruncated == nil || !*output.IsTruncated {
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break
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}
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continuationToken = output.NextContinuationToken
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}
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bucket.mu.Lock()
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bucket.UsedSize = totalSize
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bucket.mu.Unlock()
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}
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// GetBucket 获取指定名称的存储桶
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func (m *Manager) GetBucket(name string) (*BucketInfo, bool) {
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m.mu.RLock()
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defer m.mu.RUnlock()
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bucket, ok := m.buckets[name]
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return bucket, ok
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}
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// GetAllBuckets 获取所有存储桶
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func (m *Manager) GetAllBuckets() []*BucketInfo {
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m.mu.RLock()
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defer m.mu.RUnlock()
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buckets := make([]*BucketInfo, 0, len(m.buckets))
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for _, b := range m.buckets {
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buckets = append(buckets, b)
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}
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return buckets
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}
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// GetAvailableBuckets 获取所有可用的存储桶
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func (m *Manager) GetAvailableBuckets() []*BucketInfo {
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m.mu.RLock()
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defer m.mu.RUnlock()
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var available []*BucketInfo
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for _, b := range m.buckets {
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b.mu.RLock()
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if b.Available && (b.Config.MaxSizeBytes == 0 || b.UsedSize < b.Config.MaxSizeBytes) {
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available = append(available, b)
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}
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b.mu.RUnlock()
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}
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return available
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}
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// GetAvailableSpace 获取存储桶的可用空间
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func (b *BucketInfo) GetAvailableSpace() int64 {
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b.mu.RLock()
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defer b.mu.RUnlock()
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if b.Config.MaxSizeBytes == 0 {
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return 1 << 62 // 返回一个很大的数表示无限制
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}
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return b.Config.MaxSizeBytes - b.UsedSize
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}
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// IsAvailable 检查存储桶是否可用
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func (b *BucketInfo) IsAvailable() bool {
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b.mu.RLock()
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defer b.mu.RUnlock()
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return b.Available
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}
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// GetUsedSize 获取已使用容量
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func (b *BucketInfo) GetUsedSize() int64 {
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b.mu.RLock()
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defer b.mu.RUnlock()
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return b.UsedSize
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}
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// UpdateUsedSize 更新已使用容量
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func (b *BucketInfo) UpdateUsedSize(delta int64) {
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b.mu.Lock()
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defer b.mu.Unlock()
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b.UsedSize += delta
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}
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