minio/pkg/madmin/service.go

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/*
* Minio Cloud Storage, (C) 2016 Minio, Inc.
*
* 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 madmin
import (
"bytes"
"encoding/json"
"encoding/xml"
"errors"
"io/ioutil"
"net/http"
"net/url"
)
// BackendType - represents different backend types.
type BackendType int
// Enum for different backend types.
const (
Unknown BackendType = iota
// Filesystem backend.
FS
// Multi disk XL (single, distributed) backend.
XL
// Add your own backend.
)
// ServiceStatusMetadata - represents total capacity of underlying storage.
type ServiceStatusMetadata struct {
// Total disk space.
Total int64
// Free available disk space.
Free int64
// Backend type.
Backend struct {
// Represents various backend types, currently on FS and XL.
Type BackendType
// Following fields are only meaningful if BackendType is XL.
OnlineDisks int // Online disks during server startup.
OfflineDisks int // Offline disks during server startup.
ReadQuorum int // Minimum disks required for successful read operations.
WriteQuorum int // Minimum disks required for successful write operations.
}
}
// ServiceStatus - Connect to a minio server and call Service Status Management API
// to fetch server's storage information represented by ServiceStatusMetadata structure
func (adm *AdminClient) ServiceStatus() (ServiceStatusMetadata, error) {
reqData := requestData{}
reqData.queryValues = make(url.Values)
reqData.queryValues.Set("service", "")
reqData.customHeaders = make(http.Header)
reqData.customHeaders.Set(minioAdminOpHeader, "status")
// Execute GET on bucket to list objects.
resp, err := adm.executeMethod("GET", reqData)
defer closeResponse(resp)
if err != nil {
return ServiceStatusMetadata{}, err
}
if resp.StatusCode != http.StatusOK {
return ServiceStatusMetadata{}, errors.New("Got HTTP Status: " + resp.Status)
}
respBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return ServiceStatusMetadata{}, err
}
var storageInfo ServiceStatusMetadata
err = json.Unmarshal(respBytes, &storageInfo)
if err != nil {
return ServiceStatusMetadata{}, err
}
return storageInfo, nil
}
// ServiceRestart - Call Service Restart API to restart a specified Minio server
func (adm *AdminClient) ServiceRestart() error {
//
reqData := requestData{}
reqData.queryValues = make(url.Values)
reqData.queryValues.Set("service", "")
reqData.customHeaders = make(http.Header)
reqData.customHeaders.Set(minioAdminOpHeader, "restart")
// Execute GET on bucket to list objects.
resp, err := adm.executeMethod("POST", reqData)
defer closeResponse(resp)
if err != nil {
return err
}
if resp.StatusCode != http.StatusOK {
return errors.New("Got HTTP Status: " + resp.Status)
}
return nil
}
// setCredsReq - xml to send to the server to set new credentials
type setCredsReq struct {
Username string `xml:"username"`
Password string `xml:"password"`
}
// ServiceSetCredentials - Call Service Set Credentials API to set new access and secret keys in the specified Minio server
func (adm *AdminClient) ServiceSetCredentials(access, secret string) error {
// Disallow sending with the server if the connection is not secure
if !adm.secure {
return errors.New("setting new credentials requires HTTPS connection to the server")
}
// Setup new request
reqData := requestData{}
reqData.queryValues = make(url.Values)
reqData.queryValues.Set("service", "")
reqData.customHeaders = make(http.Header)
reqData.customHeaders.Set(minioAdminOpHeader, "set-credentials")
// Setup request's body
body, err := xml.Marshal(setCredsReq{Username: access, Password: secret})
if err != nil {
return err
}
reqData.contentBody = bytes.NewReader(body)
reqData.contentLength = int64(len(body))
reqData.contentMD5Bytes = sumMD5(body)
reqData.contentSHA256Bytes = sum256(body)
// Execute GET on bucket to list objects.
resp, err := adm.executeMethod("POST", reqData)
defer closeResponse(resp)
if err != nil {
return err
}
// Return error to the caller if http response code is different from 200
if resp.StatusCode != http.StatusOK {
return httpRespToErrorResponse(resp)
}
return nil
}