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minio/pkg/madmin/config-commands.go

131 lines
3.4 KiB

/*
* Minio Cloud Storage, (C) 2017 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 (
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"github.com/minio/minio/pkg/quick"
)
// NodeSummary - represents the result of an operation part of
// set-config on a node.
type NodeSummary struct {
Name string `json:"name"`
ErrSet bool `json:"errSet"`
ErrMsg string `json:"errMsg"`
}
// SetConfigResult - represents detailed results of a set-config
// operation.
type SetConfigResult struct {
NodeResults []NodeSummary `json:"nodeResults"`
Status bool `json:"status"`
}
// GetConfig - returns the config.json of a minio setup.
func (adm *AdminClient) GetConfig() ([]byte, error) {
// No TLS?
if !adm.secure {
return nil, fmt.Errorf("credentials/configuration cannot be retrieved over an insecure connection")
}
// Execute GET on /minio/admin/v1/config to get config of a setup.
resp, err := adm.executeMethod("GET",
requestData{relPath: "/v1/config"})
defer closeResponse(resp)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return nil, httpRespToErrorResponse(resp)
}
// Return the JSON marshaled bytes to user.
return ioutil.ReadAll(resp.Body)
}
// SetConfig - set config supplied as config.json for the setup.
func (adm *AdminClient) SetConfig(config io.Reader) (r SetConfigResult, err error) {
const maxConfigJSONSize = 256 * 1024 // 256KiB
if !adm.secure { // No TLS?
return r, fmt.Errorf("credentials/configuration cannot be updated over an insecure connection")
}
// Read configuration bytes
configBuf := make([]byte, maxConfigJSONSize+1)
n, err := io.ReadFull(config, configBuf)
if err == nil {
return r, fmt.Errorf("too large file")
}
if err != io.ErrUnexpectedEOF {
return r, err
}
configBytes := configBuf[:n]
type configVersion struct {
Version string `json:"version,omitempty"`
}
var cfg configVersion
// Check if read data is in json format
if err = json.Unmarshal(configBytes, &cfg); err != nil {
return r, errors.New("Invalid JSON format: " + err.Error())
}
// Check if the provided json file has "version" key set
if cfg.Version == "" {
return r, errors.New("Missing or unset \"version\" key in json file")
}
// Validate there are no duplicate keys in the JSON
if err = quick.CheckDuplicateKeys(string(configBytes)); err != nil {
return r, errors.New("Duplicate key in json file: " + err.Error())
}
reqData := requestData{
relPath: "/v1/config",
content: configBytes,
}
// Execute PUT on /minio/admin/v1/config to set config.
resp, err := adm.executeMethod("PUT", reqData)
defer closeResponse(resp)
if err != nil {
return r, err
}
if resp.StatusCode != http.StatusOK {
return r, httpRespToErrorResponse(resp)
}
jsonBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return r, err
}
err = json.Unmarshal(jsonBytes, &r)
return r, err
}