k8s-csi-s3/pkg/s3/s3-client.go

142 lines
3 KiB
Go
Raw Normal View History

2018-07-14 08:48:22 +00:00
package s3
import (
"bytes"
"encoding/json"
2018-07-14 08:48:22 +00:00
"fmt"
"io"
2018-07-14 08:48:22 +00:00
"net/url"
"github.com/golang/glog"
"github.com/minio/minio-go"
)
const (
metadataName = ".metadata.json"
fsPrefix = "csi-fs"
2018-07-14 08:48:22 +00:00
)
type s3Client struct {
2018-07-16 18:24:54 +00:00
cfg *Config
2018-07-14 08:48:22 +00:00
minio *minio.Client
}
type bucket struct {
Name string
Mounter string
FSPath string
CapacityBytes int64
}
2018-07-16 18:24:54 +00:00
func newS3Client(cfg *Config) (*s3Client, error) {
2018-07-14 08:48:22 +00:00
var client = &s3Client{}
2018-07-16 18:24:54 +00:00
client.cfg = cfg
u, err := url.Parse(client.cfg.Endpoint)
2018-07-14 08:48:22 +00:00
if err != nil {
return nil, err
}
ssl := u.Scheme == "https"
endpoint := u.Hostname()
if u.Port() != "" {
endpoint = u.Hostname() + ":" + u.Port()
}
2018-07-16 18:24:54 +00:00
minioClient, err := minio.New(endpoint, client.cfg.AccessKeyID, client.cfg.SecretAccessKey, ssl)
2018-07-14 08:48:22 +00:00
if err != nil {
return nil, err
}
client.minio = minioClient
return client, nil
}
func (client *s3Client) bucketExists(bucketName string) (bool, error) {
return client.minio.BucketExists(bucketName)
}
func (client *s3Client) createBucket(bucketName string) error {
2018-07-16 18:24:54 +00:00
return client.minio.MakeBucket(bucketName, client.cfg.Region)
2018-07-14 08:48:22 +00:00
}
func (client *s3Client) createPrefix(bucketName string, prefix string) error {
_, err := client.minio.PutObject(bucketName, prefix+"/", bytes.NewReader([]byte("")), 0, minio.PutObjectOptions{})
if err != nil {
return err
}
return nil
}
2018-07-14 08:48:22 +00:00
func (client *s3Client) removeBucket(bucketName string) error {
if err := client.emptyBucket(bucketName); err != nil {
return err
}
return client.minio.RemoveBucket(bucketName)
}
func (client *s3Client) emptyBucket(bucketName string) error {
objectsCh := make(chan string)
var listErr error
go func() {
defer close(objectsCh)
doneCh := make(chan struct{})
defer close(doneCh)
for object := range client.minio.ListObjects(bucketName, "", true, doneCh) {
if object.Err != nil {
listErr = object.Err
return
}
objectsCh <- object.Key
}
}()
if listErr != nil {
glog.Error("Error listing objects", listErr)
return listErr
}
select {
default:
errorCh := client.minio.RemoveObjects(bucketName, objectsCh)
for e := range errorCh {
glog.Errorf("Failed to remove object %s, error: %s", e.ObjectName, e.Err)
}
if len(errorCh) != 0 {
return fmt.Errorf("Failed to remove all objects of bucket %s", bucketName)
}
}
return nil
}
func (client *s3Client) setBucket(bucket *bucket) error {
b := new(bytes.Buffer)
json.NewEncoder(b).Encode(bucket)
opts := minio.PutObjectOptions{ContentType: "application/json"}
_, err := client.minio.PutObject(bucket.Name, metadataName, b, int64(b.Len()), opts)
return err
}
func (client *s3Client) getBucket(bucketName string) (*bucket, error) {
opts := minio.GetObjectOptions{}
obj, err := client.minio.GetObject(bucketName, metadataName, opts)
if err != nil {
return &bucket{}, err
}
objInfo, err := obj.Stat()
if err != nil {
return &bucket{}, err
}
b := make([]byte, objInfo.Size)
_, err = obj.Read(b)
if err != nil && err != io.EOF {
return &bucket{}, err
}
var meta bucket
err = json.Unmarshal(b, &meta)
return &meta, err
}