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/*
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"context"
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"crypto/tls"
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"encoding/gob"
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"io"
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"net/url"
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"strconv"
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"time"
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"github.com/minio/minio/cmd/http"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/cmd/rest"
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"github.com/minio/minio/pkg/event"
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"github.com/minio/minio/pkg/lifecycle"
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"github.com/minio/minio/pkg/madmin"
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xnet "github.com/minio/minio/pkg/net"
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"github.com/minio/minio/pkg/policy"
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trace "github.com/minio/minio/pkg/trace"
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)
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// client to talk to peer Nodes.
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type peerRESTClient struct {
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host *xnet.Host
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restClient *rest.Client
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connected bool
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}
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// Reconnect to a peer rest server.
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func (client *peerRESTClient) reConnect() error {
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// correct (intelligent) retry logic will be
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// implemented in subsequent PRs.
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client.connected = true
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return nil
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}
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// Wrapper to restClient.Call to handle network errors, in case of network error the connection is marked disconnected
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// permanently. The only way to restore the connection is at the xl-sets layer by xlsets.monitorAndConnectEndpoints()
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// after verifying format.json
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func (client *peerRESTClient) call(method string, values url.Values, body io.Reader, length int64) (respBody io.ReadCloser, err error) {
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return client.callWithContext(context.Background(), method, values, body, length)
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}
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// Wrapper to restClient.Call to handle network errors, in case of network error the connection is marked disconnected
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// permanently. The only way to restore the connection is at the xl-sets layer by xlsets.monitorAndConnectEndpoints()
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// after verifying format.json
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func (client *peerRESTClient) callWithContext(ctx context.Context, method string, values url.Values, body io.Reader, length int64) (respBody io.ReadCloser, err error) {
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if !client.connected {
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err := client.reConnect()
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logger.LogIf(ctx, err)
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if err != nil {
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return nil, err
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}
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}
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if values == nil {
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values = make(url.Values)
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}
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respBody, err = client.restClient.CallWithContext(ctx, method, values, body, length)
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if err == nil {
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return respBody, nil
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}
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if isNetworkError(err) {
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client.connected = false
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}
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return nil, err
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}
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// Stringer provides a canonicalized representation of node.
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func (client *peerRESTClient) String() string {
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return client.host.String()
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}
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// IsOnline - returns whether RPC client failed to connect or not.
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func (client *peerRESTClient) IsOnline() bool {
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return client.connected
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}
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// Close - marks the client as closed.
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func (client *peerRESTClient) Close() error {
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client.connected = false
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client.restClient.Close()
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return nil
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}
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// GetLocksResp stores various info from the client for each lock that is requested.
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type GetLocksResp map[string][]lockRequesterInfo
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// GetLocks - fetch older locks for a remote node.
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func (client *peerRESTClient) GetLocks() (locks GetLocksResp, err error) {
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respBody, err := client.call(peerRESTMethodGetLocks, nil, nil, -1)
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if err != nil {
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return
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&locks)
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return locks, err
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}
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// ServerInfo - fetch server information for a remote node.
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func (client *peerRESTClient) ServerInfo() (info ServerInfoData, err error) {
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respBody, err := client.call(peerRESTMethodServerInfo, nil, nil, -1)
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if err != nil {
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return
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&info)
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return info, err
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}
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// CPULoadInfo - fetch CPU information for a remote node.
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func (client *peerRESTClient) CPULoadInfo() (info ServerCPULoadInfo, err error) {
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respBody, err := client.call(peerRESTMethodCPULoadInfo, nil, nil, -1)
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if err != nil {
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return
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&info)
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return info, err
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}
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// DrivePerfInfo - fetch Drive performance information for a remote node.
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func (client *peerRESTClient) DrivePerfInfo() (info ServerDrivesPerfInfo, err error) {
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respBody, err := client.call(peerRESTMethodDrivePerfInfo, nil, nil, -1)
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if err != nil {
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return
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&info)
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return info, err
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}
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// MemUsageInfo - fetch memory usage information for a remote node.
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func (client *peerRESTClient) MemUsageInfo() (info ServerMemUsageInfo, err error) {
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respBody, err := client.call(peerRESTMethodMemUsageInfo, nil, nil, -1)
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if err != nil {
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return
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&info)
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return info, err
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}
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// StartProfiling - Issues profiling command on the peer node.
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func (client *peerRESTClient) StartProfiling(profiler string) error {
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values := make(url.Values)
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values.Set(peerRESTProfiler, profiler)
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respBody, err := client.call(peerRESTMethodStartProfiling, values, nil, -1)
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if err != nil {
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return err
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}
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defer http.DrainBody(respBody)
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return nil
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}
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// DownloadProfileData - download profiled data from a remote node.
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func (client *peerRESTClient) DownloadProfileData() (data []byte, err error) {
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respBody, err := client.call(peerRESTMethodDownloadProfilingData, nil, nil, -1)
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if err != nil {
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return
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}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&data)
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return data, err
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}
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// DeleteBucket - Delete notification and policies related to the bucket.
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func (client *peerRESTClient) DeleteBucket(bucket string) error {
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values := make(url.Values)
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values.Set(peerRESTBucket, bucket)
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respBody, err := client.call(peerRESTMethodDeleteBucket, values, nil, -1)
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if err != nil {
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return err
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}
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defer http.DrainBody(respBody)
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return nil
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}
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// ReloadFormat - reload format on the peer node.
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func (client *peerRESTClient) ReloadFormat(dryRun bool) error {
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values := make(url.Values)
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if dryRun {
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values.Set(peerRESTDryRun, "true")
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} else {
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values.Set(peerRESTDryRun, "false")
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}
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respBody, err := client.call(peerRESTMethodReloadFormat, values, nil, -1)
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if err != nil {
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return err
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}
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defer http.DrainBody(respBody)
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return nil
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}
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// ListenBucketNotification - send listen bucket notification to peer nodes.
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func (client *peerRESTClient) ListenBucketNotification(bucket string, eventNames []event.Name,
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pattern string, targetID event.TargetID, addr xnet.Host) error {
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args := listenBucketNotificationReq{
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EventNames: eventNames,
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Pattern: pattern,
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TargetID: targetID,
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Addr: addr,
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}
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values := make(url.Values)
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values.Set(peerRESTBucket, bucket)
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var reader bytes.Buffer
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err := gob.NewEncoder(&reader).Encode(args)
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if err != nil {
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return err
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}
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respBody, err := client.call(peerRESTMethodBucketNotificationListen, values, &reader, -1)
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if err != nil {
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return err
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}
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defer http.DrainBody(respBody)
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return nil
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}
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// SendEvent - calls send event RPC.
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func (client *peerRESTClient) SendEvent(bucket string, targetID, remoteTargetID event.TargetID, eventData event.Event) error {
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args := sendEventRequest{
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TargetID: remoteTargetID,
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Event: eventData,
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}
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values := make(url.Values)
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values.Set(peerRESTBucket, bucket)
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var reader bytes.Buffer
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err := gob.NewEncoder(&reader).Encode(args)
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if err != nil {
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return err
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}
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respBody, err := client.call(peerRESTMethodSendEvent, values, &reader, -1)
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if err != nil {
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return err
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}
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var eventResp sendEventResp
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&eventResp)
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if err != nil || !eventResp.Success {
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reqInfo := &logger.ReqInfo{BucketName: bucket}
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reqInfo.AppendTags("targetID", targetID.Name)
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reqInfo.AppendTags("event", eventData.EventName.String())
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ctx := logger.SetReqInfo(context.Background(), reqInfo)
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logger.LogIf(ctx, err)
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globalNotificationSys.RemoveRemoteTarget(bucket, targetID)
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}
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return err
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}
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// RemoteTargetExist - calls remote target ID exist REST API.
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func (client *peerRESTClient) RemoteTargetExist(bucket string, targetID event.TargetID) (bool, error) {
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values := make(url.Values)
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values.Set(peerRESTBucket, bucket)
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var reader bytes.Buffer
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err := gob.NewEncoder(&reader).Encode(targetID)
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if err != nil {
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return false, err
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}
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respBody, err := client.call(peerRESTMethodTargetExists, values, &reader, -1)
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if err != nil {
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return false, err
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}
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defer http.DrainBody(respBody)
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var targetExists remoteTargetExistsResp
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err = gob.NewDecoder(respBody).Decode(&targetExists)
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return targetExists.Exists, err
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}
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// RemoveBucketPolicy - Remove bucket policy on the peer node.
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func (client *peerRESTClient) RemoveBucketPolicy(bucket string) error {
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values := make(url.Values)
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values.Set(peerRESTBucket, bucket)
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respBody, err := client.call(peerRESTMethodBucketPolicyRemove, values, nil, -1)
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if err != nil {
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return err
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}
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defer http.DrainBody(respBody)
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return nil
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}
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// SetBucketPolicy - Set bucket policy on the peer node.
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func (client *peerRESTClient) SetBucketPolicy(bucket string, bucketPolicy *policy.Policy) error {
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values := make(url.Values)
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values.Set(peerRESTBucket, bucket)
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var reader bytes.Buffer
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err := gob.NewEncoder(&reader).Encode(bucketPolicy)
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if err != nil {
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return err
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}
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respBody, err := client.call(peerRESTMethodBucketPolicySet, values, &reader, -1)
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if err != nil {
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return err
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}
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defer http.DrainBody(respBody)
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return nil
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}
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// RemoveBucketLifecycle - Remove bucket lifecycle configuration on the peer node
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func (client *peerRESTClient) RemoveBucketLifecycle(bucket string) error {
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values := make(url.Values)
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values.Set(peerRESTBucket, bucket)
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respBody, err := client.call(peerRESTMethodBucketLifecycleRemove, values, nil, -1)
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if err != nil {
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return err
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}
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defer http.DrainBody(respBody)
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return nil
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}
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// SetBucketLifecycle - Set bucket lifecycle configuration on the peer node
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func (client *peerRESTClient) SetBucketLifecycle(bucket string, bucketLifecycle *lifecycle.Lifecycle) error {
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values := make(url.Values)
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values.Set(peerRESTBucket, bucket)
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var reader bytes.Buffer
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err := gob.NewEncoder(&reader).Encode(bucketLifecycle)
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if err != nil {
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return err
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}
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respBody, err := client.call(peerRESTMethodBucketLifecycleSet, values, &reader, -1)
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if err != nil {
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return err
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}
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defer http.DrainBody(respBody)
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return nil
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}
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// PutBucketNotification - Put bucket notification on the peer node.
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func (client *peerRESTClient) PutBucketNotification(bucket string, rulesMap event.RulesMap) error {
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values := make(url.Values)
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values.Set(peerRESTBucket, bucket)
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var reader bytes.Buffer
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err := gob.NewEncoder(&reader).Encode(&rulesMap)
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if err != nil {
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return err
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}
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respBody, err := client.call(peerRESTMethodBucketNotificationPut, values, &reader, -1)
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if err != nil {
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return err
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}
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defer http.DrainBody(respBody)
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return nil
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}
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// DeletePolicy - delete a specific canned policy.
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|
|
func (client *peerRESTClient) DeletePolicy(policyName string) (err error) {
|
|
|
|
values := make(url.Values)
|
|
|
|
values.Set(peerRESTPolicy, policyName)
|
|
|
|
|
|
|
|
respBody, err := client.call(peerRESTMethodDeletePolicy, values, nil, -1)
|
|
|
|
if err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
defer http.DrainBody(respBody)
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// LoadPolicy - reload a specific canned policy.
|
|
|
|
func (client *peerRESTClient) LoadPolicy(policyName string) (err error) {
|
|
|
|
values := make(url.Values)
|
|
|
|
values.Set(peerRESTPolicy, policyName)
|
|
|
|
|
|
|
|
respBody, err := client.call(peerRESTMethodLoadPolicy, values, nil, -1)
|
|
|
|
if err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
defer http.DrainBody(respBody)
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// DeleteUser - delete a specific user.
|
|
|
|
func (client *peerRESTClient) DeleteUser(accessKey string) (err error) {
|
|
|
|
values := make(url.Values)
|
|
|
|
values.Set(peerRESTUser, accessKey)
|
|
|
|
|
|
|
|
respBody, err := client.call(peerRESTMethodDeleteUser, values, nil, -1)
|
|
|
|
if err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
defer http.DrainBody(respBody)
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// LoadUser - reload a specific user.
|
|
|
|
func (client *peerRESTClient) LoadUser(accessKey string, temp bool) (err error) {
|
|
|
|
values := make(url.Values)
|
|
|
|
values.Set(peerRESTUser, accessKey)
|
|
|
|
values.Set(peerRESTUserTemp, strconv.FormatBool(temp))
|
|
|
|
|
|
|
|
respBody, err := client.call(peerRESTMethodLoadUser, values, nil, -1)
|
|
|
|
if err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
defer http.DrainBody(respBody)
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// LoadUsers - send load users command to peer nodes.
|
|
|
|
func (client *peerRESTClient) LoadUsers() (err error) {
|
|
|
|
respBody, err := client.call(peerRESTMethodLoadUsers, nil, nil, -1)
|
|
|
|
if err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
defer http.DrainBody(respBody)
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// LoadGroup - send load group command to peers.
|
|
|
|
func (client *peerRESTClient) LoadGroup(group string) error {
|
|
|
|
values := make(url.Values)
|
|
|
|
values.Set(peerRESTGroup, group)
|
|
|
|
respBody, err := client.call(peerRESTMethodLoadGroup, values, nil, -1)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
defer http.DrainBody(respBody)
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// SignalService - sends signal to peer nodes.
|
|
|
|
func (client *peerRESTClient) SignalService(sig serviceSignal) error {
|
|
|
|
values := make(url.Values)
|
|
|
|
values.Set(peerRESTSignal, string(sig))
|
|
|
|
respBody, err := client.call(peerRESTMethodSignalService, values, nil, -1)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
defer http.DrainBody(respBody)
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
func (client *peerRESTClient) BackgroundHealStatus() (madmin.BgHealState, error) {
|
|
|
|
respBody, err := client.call(peerRESTMethodBackgroundHealStatus, nil, nil, -1)
|
|
|
|
if err != nil {
|
|
|
|
return madmin.BgHealState{}, err
|
|
|
|
}
|
|
|
|
defer http.DrainBody(respBody)
|
|
|
|
|
|
|
|
state := madmin.BgHealState{}
|
|
|
|
err = gob.NewDecoder(respBody).Decode(&state)
|
|
|
|
return state, err
|
|
|
|
}
|
|
|
|
|
|
|
|
// BgLifecycleOpsStatus describes the status
|
|
|
|
// of the background lifecycle operations
|
|
|
|
type BgLifecycleOpsStatus struct {
|
|
|
|
LastActivity time.Time
|
|
|
|
}
|
|
|
|
|
|
|
|
// BgOpsStatus describes the status of all operations performed
|
|
|
|
// in background such as auto-healing and lifecycle.
|
|
|
|
// Notice: We need to increase peer REST API version when adding
|
|
|
|
// new fields to this struct.
|
|
|
|
type BgOpsStatus struct {
|
|
|
|
LifecycleOps BgLifecycleOpsStatus
|
|
|
|
}
|
|
|
|
|
|
|
|
func (client *peerRESTClient) BackgroundOpsStatus() (BgOpsStatus, error) {
|
|
|
|
respBody, err := client.call(peerRESTMethodBackgroundOpsStatus, nil, nil, -1)
|
|
|
|
if err != nil {
|
|
|
|
return BgOpsStatus{}, err
|
|
|
|
}
|
|
|
|
defer http.DrainBody(respBody)
|
|
|
|
|
|
|
|
state := BgOpsStatus{}
|
|
|
|
err = gob.NewDecoder(respBody).Decode(&state)
|
|
|
|
return state, err
|
|
|
|
}
|
|
|
|
|
|
|
|
func (client *peerRESTClient) doTrace(traceCh chan interface{}, doneCh chan struct{}, trcAll, trcErr bool) {
|
|
|
|
values := make(url.Values)
|
|
|
|
values.Set(peerRESTTraceAll, strconv.FormatBool(trcAll))
|
|
|
|
values.Set(peerRESTTraceErr, strconv.FormatBool(trcErr))
|
|
|
|
|
|
|
|
// To cancel the REST request in case doneCh gets closed.
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
|
|
|
|
|
|
cancelCh := make(chan struct{})
|
|
|
|
defer close(cancelCh)
|
|
|
|
go func() {
|
|
|
|
select {
|
|
|
|
case <-doneCh:
|
|
|
|
case <-cancelCh:
|
|
|
|
// There was an error in the REST request.
|
|
|
|
}
|
|
|
|
cancel()
|
|
|
|
}()
|
|
|
|
|
|
|
|
respBody, err := client.callWithContext(ctx, peerRESTMethodTrace, values, nil, -1)
|
|
|
|
defer http.DrainBody(respBody)
|
|
|
|
|
|
|
|
if err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
dec := gob.NewDecoder(respBody)
|
|
|
|
for {
|
|
|
|
var info trace.Info
|
|
|
|
if err = dec.Decode(&info); err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
if len(info.NodeName) > 0 {
|
|
|
|
select {
|
|
|
|
case traceCh <- info:
|
|
|
|
default:
|
|
|
|
// Do not block on slow receivers.
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Trace - send http trace request to peer nodes
|
|
|
|
func (client *peerRESTClient) Trace(traceCh chan interface{}, doneCh chan struct{}, trcAll, trcErr bool) {
|
|
|
|
go func() {
|
|
|
|
for {
|
|
|
|
client.doTrace(traceCh, doneCh, trcAll, trcErr)
|
|
|
|
select {
|
|
|
|
case <-doneCh:
|
|
|
|
return
|
|
|
|
default:
|
|
|
|
// There was error in the REST request, retry after sometime as probably the peer is down.
|
|
|
|
time.Sleep(5 * time.Second)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}()
|
|
|
|
}
|
|
|
|
|
|
|
|
func getRemoteHosts(endpoints EndpointList) []*xnet.Host {
|
|
|
|
var remoteHosts []*xnet.Host
|
|
|
|
for _, hostStr := range GetRemotePeers(endpoints) {
|
|
|
|
host, err := xnet.ParseHost(hostStr)
|
|
|
|
logger.FatalIf(err, "Unable to parse peer Host")
|
|
|
|
remoteHosts = append(remoteHosts, host)
|
|
|
|
}
|
|
|
|
|
|
|
|
return remoteHosts
|
|
|
|
}
|
|
|
|
|
|
|
|
func getRestClients(peerHosts []*xnet.Host) ([]*peerRESTClient, error) {
|
|
|
|
restClients := make([]*peerRESTClient, len(peerHosts))
|
|
|
|
for i, host := range peerHosts {
|
|
|
|
client, err := newPeerRESTClient(host)
|
|
|
|
if err != nil {
|
|
|
|
logger.LogIf(context.Background(), err)
|
|
|
|
}
|
|
|
|
restClients[i] = client
|
|
|
|
}
|
|
|
|
|
|
|
|
return restClients, nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// Returns a peer rest client.
|
|
|
|
func newPeerRESTClient(peer *xnet.Host) (*peerRESTClient, error) {
|
|
|
|
|
|
|
|
scheme := "http"
|
|
|
|
if globalIsSSL {
|
|
|
|
scheme = "https"
|
|
|
|
}
|
|
|
|
|
|
|
|
serverURL := &url.URL{
|
|
|
|
Scheme: scheme,
|
|
|
|
Host: peer.String(),
|
|
|
|
Path: peerRESTPath,
|
|
|
|
}
|
|
|
|
|
|
|
|
var tlsConfig *tls.Config
|
|
|
|
if globalIsSSL {
|
|
|
|
tlsConfig = &tls.Config{
|
|
|
|
ServerName: peer.Name,
|
|
|
|
RootCAs: globalRootCAs,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
restClient, err := rest.NewClient(serverURL, tlsConfig, rest.DefaultRESTTimeout, newAuthToken)
|
|
|
|
|
|
|
|
if err != nil {
|
|
|
|
return &peerRESTClient{host: peer, restClient: restClient, connected: false}, err
|
|
|
|
}
|
|
|
|
|
|
|
|
return &peerRESTClient{host: peer, restClient: restClient, connected: true}, nil
|
|
|
|
}
|