minio/cmd/control-router.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 cmd
import (
"fmt"
"net/rpc"
"path"
router "github.com/gorilla/mux"
)
// Routes paths for "minio control" commands.
const (
controlPath = "/control"
)
// Initializes remote control clients for making remote requests.
func initRemoteControlClients(srvCmdConfig serverCmdConfig) []*AuthRPCClient {
if !srvCmdConfig.isDistXL {
return nil
}
// Initialize auth rpc clients.
var remoteControlClnts []*AuthRPCClient
localMap := make(map[storageEndPoint]int)
for _, ep := range srvCmdConfig.endPoints {
// Set path to "" so that it is not used for filtering the
// unique entries.
ep.path = ""
// Validates if remote disk is local.
if isLocalStorage(ep) {
continue
}
if localMap[ep] == 1 {
continue
}
localMap[ep]++
remoteControlClnts = append(remoteControlClnts, newAuthClient(&authConfig{
accessKey: serverConfig.GetCredential().AccessKeyID,
secretKey: serverConfig.GetCredential().SecretAccessKey,
secureConn: isSSL(),
address: fmt.Sprintf("%s:%d", ep.host, ep.port),
path: path.Join(reservedBucket, controlPath),
loginMethod: "Control.LoginHandler",
}))
}
return remoteControlClnts
}
// Represents control object which provides handlers for control
// operations on server.
type controlAPIHandlers struct {
ObjectAPI func() ObjectLayer
IsXL bool
RemoteControls []*AuthRPCClient
LocalNode string
StorageDisks []StorageAPI
}
// Register control RPC handlers.
func registerControlRPCRouter(mux *router.Router, srvCmdConfig serverCmdConfig) (err error) {
// Initialize Control.
ctrlHandlers := &controlAPIHandlers{
ObjectAPI: newObjectLayerFn,
IsXL: srvCmdConfig.isDistXL || len(srvCmdConfig.storageDisks) > 1,
RemoteControls: initRemoteControlClients(srvCmdConfig),
LocalNode: getLocalAddress(srvCmdConfig),
StorageDisks: srvCmdConfig.storageDisks,
}
ctrlRPCServer := rpc.NewServer()
err = ctrlRPCServer.RegisterName("Control", ctrlHandlers)
if err != nil {
return traceError(err)
}
ctrlRouter := mux.NewRoute().PathPrefix(reservedBucket).Subrouter()
ctrlRouter.Path(controlPath).Handler(ctrlRPCServer)
return nil
}