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minio_handler.go
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/
minio_handler.go
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// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 accesslog
import (
"context"
"fmt"
"os"
"path"
"strings"
"sync"
"time"
"github.com/minio/minio-go/v7"
"github.com/minio/minio-go/v7/pkg/credentials"
"go.uber.org/zap"
"github.com/milvus-io/milvus/pkg/log"
"github.com/milvus-io/milvus/pkg/util/paramtable"
"github.com/milvus-io/milvus/pkg/util/retry"
)
type config struct {
address string
bucketName string
accessKeyID string
secretAccessKeyID string
useSSL bool
sslCACert string
createBucket bool
useIAM bool
iamEndpoint string
}
// minIO client for upload access log
// TODO file retention on minio
type (
RetentionFunc func(object minio.ObjectInfo) bool
task struct {
objectName string
filePath string
}
)
type minioHandler struct {
bucketName string
rootPath string
retentionPolicy RetentionFunc
client *minio.Client
taskCh chan task
closeCh chan struct{}
closeWg sync.WaitGroup
closeOnce sync.Once
}
func NewMinioHandler(ctx context.Context, cfg *paramtable.MinioConfig, rootPath string, queueLen int) (*minioHandler, error) {
if !strings.HasSuffix(rootPath, "/") {
rootPath = rootPath + "/"
}
handlerCfg := config{
address: cfg.Address.GetValue(),
bucketName: cfg.BucketName.GetValue(),
accessKeyID: cfg.AccessKeyID.GetValue(),
secretAccessKeyID: cfg.SecretAccessKey.GetValue(),
useSSL: cfg.UseSSL.GetAsBool(),
sslCACert: cfg.SslCACert.GetValue(),
createBucket: true,
useIAM: cfg.UseIAM.GetAsBool(),
iamEndpoint: cfg.IAMEndpoint.GetValue(),
}
client, err := newMinioClient(ctx, handlerCfg)
if err != nil {
return nil, err
}
handler := &minioHandler{
bucketName: handlerCfg.bucketName,
rootPath: rootPath,
client: client,
}
handler.start(queueLen)
return handler, nil
}
func newMinioClient(ctx context.Context, cfg config) (*minio.Client, error) {
var creds *credentials.Credentials
if cfg.useIAM {
creds = credentials.NewIAM(cfg.iamEndpoint)
} else {
creds = credentials.NewStaticV4(cfg.accessKeyID, cfg.secretAccessKeyID, "")
}
// We must set the cert path by os environment variable "SSL_CERT_FILE",
// because the minio.DefaultTransport() need this path to read the file content,
// we shouldn't read this file by ourself.
if cfg.useSSL && len(cfg.sslCACert) > 0 {
err := os.Setenv("SSL_CERT_FILE", cfg.sslCACert)
if err != nil {
return nil, err
}
}
minioClient, err := minio.New(cfg.address, &minio.Options{
Creds: creds,
Secure: cfg.useSSL,
})
// options nil or invalid formatted endpoint, don't need to retry
if err != nil {
return nil, err
}
var bucketExists bool
// check valid in first query
checkBucketFn := func() error {
bucketExists, err = minioClient.BucketExists(ctx, cfg.bucketName)
if err != nil {
log.Warn("failed to check blob bucket exist", zap.String("bucket", cfg.bucketName), zap.Error(err))
return err
}
if !bucketExists {
if cfg.createBucket {
log.Info("blob bucket not exist, create bucket.", zap.String("bucket name", cfg.bucketName))
err := minioClient.MakeBucket(ctx, cfg.bucketName, minio.MakeBucketOptions{})
if err != nil {
log.Warn("failed to create blob bucket", zap.String("bucket", cfg.bucketName), zap.Error(err))
return err
}
} else {
return fmt.Errorf("bucket %s not Existed", cfg.bucketName)
}
}
return nil
}
err = retry.Do(ctx, checkBucketFn, retry.Attempts(CheckBucketRetryAttempts))
if err != nil {
return nil, err
}
return minioClient, nil
}
func (c *minioHandler) scheduler() {
defer c.closeWg.Done()
for {
select {
case task := <-c.taskCh:
log.Info("Update access log file to minIO",
zap.String("object name", task.objectName),
zap.String("file path", task.filePath))
c.update(task.objectName, task.filePath)
c.Retention()
case <-c.closeCh:
log.Warn("close minio logger handler")
return
}
}
}
func (c *minioHandler) start(queueLen int) error {
c.closeWg = sync.WaitGroup{}
c.closeCh = make(chan struct{})
c.taskCh = make(chan task, queueLen)
c.closeWg.Add(1)
go c.scheduler()
return nil
}
func (c *minioHandler) Update(objectName string, filePath string) {
c.taskCh <- task{
objectName: objectName,
filePath: filePath,
}
taskNum := len(c.taskCh)
if taskNum >= cap(c.taskCh)/2 {
log.Warn("Minio Access log file handler was busy", zap.Int("task num", taskNum))
}
}
// update log file to minio
func (c *minioHandler) update(objectName string, filePath string) error {
path := join(c.rootPath, filePath)
_, err := c.client.FPutObject(context.Background(), c.bucketName, path, objectName, minio.PutObjectOptions{})
return err
}
func (c *minioHandler) Retention() error {
if c.retentionPolicy == nil {
return nil
}
objects := c.client.ListObjects(context.Background(), c.bucketName, minio.ListObjectsOptions{Prefix: c.rootPath, Recursive: false})
removeObjects := make(chan minio.ObjectInfo)
go func() {
defer close(removeObjects)
for object := range objects {
if c.retentionPolicy(object) {
removeObjects <- object
}
}
}()
for rErr := range c.client.RemoveObjects(context.Background(), c.bucketName, removeObjects, minio.RemoveObjectsOptions{GovernanceBypass: false}) {
if rErr.Err != nil {
log.Warn("failed to remove retention objects", zap.Error(rErr.Err))
return rErr.Err
}
}
return nil
}
func (c *minioHandler) removeWithPrefix(prefix string) error {
objects := c.client.ListObjects(context.Background(), c.bucketName, minio.ListObjectsOptions{Prefix: prefix, Recursive: true})
for rErr := range c.client.RemoveObjects(context.Background(), c.bucketName, objects, minio.RemoveObjectsOptions{GovernanceBypass: false}) {
if rErr.Err != nil {
log.Warn("failed to remove objects", zap.String("prefix", prefix), zap.Error(rErr.Err))
return rErr.Err
}
}
return nil
}
func (c *minioHandler) listAll() ([]string, error) {
var objectsKeys []string
objects := c.client.ListObjects(context.Background(), c.bucketName, minio.ListObjectsOptions{Prefix: c.rootPath, Recursive: false})
for object := range objects {
if object.Err != nil {
log.Warn("failed to list with rootpath", zap.String("rootpath", c.rootPath), zap.Error(object.Err))
return nil, object.Err
}
// with tailing "/", object is a "directory"
if strings.HasSuffix(object.Key, "/") {
continue
}
objectsKeys = append(objectsKeys, object.Key)
}
return objectsKeys, nil
}
func (c *minioHandler) Clean() error {
err := c.removeWithPrefix(c.rootPath)
return err
}
func (c *minioHandler) Close() error {
c.closeOnce.Do(func() {
close(c.closeCh)
c.closeWg.Wait()
})
return nil
}
func getTimeRetentionFunc(retentionTime int, prefix, ext string) RetentionFunc {
if retentionTime == 0 {
return nil
}
return func(object minio.ObjectInfo) bool {
name := path.Base(object.Key)
fileTime, err := timeFromName(name, prefix, ext)
if err != nil {
return false
}
nowWallTime, _ := time.Parse(timeNameFormat, time.Now().Format(timeNameFormat))
intervalTime := nowWallTime.Sub(fileTime)
return intervalTime > (time.Duration(retentionTime) * time.Hour)
}
}