* Add metrics for nodes online and offline * Add cluster capacity metrics * Introduce v2 metrics
930 lines
25 KiB
Go
930 lines
25 KiB
Go
/*
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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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"encoding/gob"
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"errors"
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"fmt"
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"io"
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"math"
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"net/url"
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"strconv"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"github.com/dustin/go-humanize"
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"github.com/minio/minio/cmd/http"
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xhttp "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/bandwidth"
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"github.com/minio/minio/pkg/event"
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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/trace"
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"github.com/tinylib/msgp/msgp"
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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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}
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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(GlobalContext, 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 values == nil {
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values = make(url.Values)
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}
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respBody, err = client.restClient.Call(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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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 true if the peer client is online.
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func (client *peerRESTClient) IsOnline() bool {
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return client.restClient.IsOnline()
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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.restClient.Close()
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return nil
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}
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// GetLocks - fetch older locks for a remote node.
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func (client *peerRESTClient) GetLocks() (lockMap map[string][]lockRequesterInfo, 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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lockMap = map[string][]lockRequesterInfo{}
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defer http.DrainBody(respBody)
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err = gob.NewDecoder(respBody).Decode(&lockMap)
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return lockMap, 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 madmin.ServerProperties, 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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type networkOverloadedErr struct{}
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var networkOverloaded networkOverloadedErr
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func (n networkOverloadedErr) Error() string {
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return "network overloaded"
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}
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type nullReader struct{}
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func (r *nullReader) Read(b []byte) (int, error) {
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return len(b), nil
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}
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func (client *peerRESTClient) doNetTest(ctx context.Context, dataSize int64, threadCount uint) (info madmin.NetPerfInfo, err error) {
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var mu sync.Mutex // mutex used to protect these slices in go-routines
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latencies := []float64{}
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throughputs := []float64{}
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buflimiter := make(chan struct{}, threadCount)
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errChan := make(chan error, threadCount)
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var totalTransferred int64
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// ensure enough samples to obtain normal distribution
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maxSamples := int(10 * threadCount)
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innerCtx, cancel := context.WithCancel(ctx)
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slowSamples := int32(0)
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maxSlowSamples := int32(maxSamples / 20)
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slowSample := func() {
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if slowSamples > maxSlowSamples { // 5% of total
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return
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}
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if atomic.AddInt32(&slowSamples, 1) >= maxSlowSamples {
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errChan <- networkOverloaded
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cancel()
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}
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}
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var wg sync.WaitGroup
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finish := func() {
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<-buflimiter
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wg.Done()
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}
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for i := 0; i < maxSamples; i++ {
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select {
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case <-ctx.Done():
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return info, ctx.Err()
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case err = <-errChan:
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case buflimiter <- struct{}{}:
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wg.Add(1)
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if innerCtx.Err() != nil {
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finish()
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continue
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}
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go func(i int) {
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start := time.Now()
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before := atomic.LoadInt64(&totalTransferred)
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ctx, cancel := context.WithTimeout(innerCtx, 10*time.Second)
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defer cancel()
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progress := io.LimitReader(&nullReader{}, dataSize)
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// Turn off healthCheckFn for health tests to cater for higher load on the peers.
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clnt := newPeerRESTClient(client.host)
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clnt.restClient.HealthCheckFn = nil
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respBody, err := clnt.callWithContext(ctx, peerRESTMethodNetInfo, nil, progress, dataSize)
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if err != nil {
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if errors.Is(err, context.DeadlineExceeded) {
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slowSample()
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finish()
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return
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}
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errChan <- err
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finish()
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return
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}
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http.DrainBody(respBody)
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finish()
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atomic.AddInt64(&totalTransferred, dataSize)
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after := atomic.LoadInt64(&totalTransferred)
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end := time.Now()
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latency := end.Sub(start).Seconds()
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if latency > maxLatencyForSizeThreads(dataSize, threadCount) {
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slowSample()
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}
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/* Throughput = (total data transferred across all threads / time taken) */
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throughput := float64((after - before)) / latency
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// Protect updating latencies and throughputs slices from
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// multiple go-routines.
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mu.Lock()
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latencies = append(latencies, latency)
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throughputs = append(throughputs, throughput)
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mu.Unlock()
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}(i)
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}
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}
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wg.Wait()
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if err != nil {
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return info, err
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}
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latency, throughput, err := xnet.ComputePerfStats(latencies, throughputs)
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info = madmin.NetPerfInfo{
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Latency: latency,
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Throughput: throughput,
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}
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return info, err
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}
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func maxLatencyForSizeThreads(size int64, threadCount uint) float64 {
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Gbit100 := 12.5 * float64(humanize.GiByte)
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Gbit40 := 5.00 * float64(humanize.GiByte)
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Gbit25 := 3.25 * float64(humanize.GiByte)
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Gbit10 := 1.25 * float64(humanize.GiByte)
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// Gbit1 := 0.25 * float64(humanize.GiByte)
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// Given the current defaults, each combination of size/thread
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// is supposed to fully saturate the intended pipe when all threads are active
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// i.e. if the test is performed in a perfectly controlled environment, i.e. without
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// CPU scheduling latencies and/or network jitters, then all threads working
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// simultaneously should result in each of them completing in 1s
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//
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// In reality, I've assumed a normal distribution of latency with expected mean of 1s and min of 0s
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// Then, 95% of threads should complete within 2 seconds (2 std. deviations from the mean). The 2s comes
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// from fitting the normal curve such that the mean is 1.
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//
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// i.e. we expect that no more than 5% of threads to take longer than 2s to push the data.
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//
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// throughput | max latency
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// 100 Gbit | 2s
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// 40 Gbit | 2s
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// 25 Gbit | 2s
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// 10 Gbit | 2s
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// 1 Gbit | inf
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throughput := float64(size * int64(threadCount))
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if throughput >= Gbit100 {
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return 2.0
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} else if throughput >= Gbit40 {
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return 2.0
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} else if throughput >= Gbit25 {
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return 2.0
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} else if throughput >= Gbit10 {
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return 2.0
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}
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return math.MaxFloat64
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}
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// NetInfo - fetch Net information for a remote node.
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func (client *peerRESTClient) NetInfo(ctx context.Context) (info madmin.NetPerfInfo, err error) {
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// 100 Gbit -> 256 MiB * 50 threads
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// 40 Gbit -> 256 MiB * 20 threads
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// 25 Gbit -> 128 MiB * 25 threads
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// 10 Gbit -> 128 MiB * 10 threads
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// 1 Gbit -> 64 MiB * 2 threads
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type step struct {
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size int64
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threads uint
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}
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steps := []step{
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{ // 100 Gbit
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size: 256 * humanize.MiByte,
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threads: 50,
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},
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{ // 40 Gbit
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size: 256 * humanize.MiByte,
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threads: 20,
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},
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{ // 25 Gbit
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size: 128 * humanize.MiByte,
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threads: 25,
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},
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{ // 10 Gbit
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size: 128 * humanize.MiByte,
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threads: 10,
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},
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{ // 1 Gbit
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size: 64 * humanize.MiByte,
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threads: 2,
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},
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}
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for i := range steps {
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size := steps[i].size
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threads := steps[i].threads
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if info, err = client.doNetTest(ctx, size, threads); err != nil {
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if err == networkOverloaded {
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continue
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}
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if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
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continue
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}
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}
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return info, err
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}
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return info, err
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}
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// DispatchNetInfo - dispatch other nodes to run Net info.
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func (client *peerRESTClient) DispatchNetInfo(ctx context.Context) (info madmin.ServerNetHealthInfo, err error) {
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respBody, err := client.callWithContext(ctx, peerRESTMethodDispatchNetInfo, 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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waitReader, err := waitForHTTPResponse(respBody)
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if err != nil {
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return
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}
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err = gob.NewDecoder(waitReader).Decode(&info)
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return
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}
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// DriveInfo - fetch Drive information for a remote node.
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func (client *peerRESTClient) DriveInfo(ctx context.Context) (info madmin.ServerDrivesInfo, err error) {
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respBody, err := client.callWithContext(ctx, peerRESTMethodDriveInfo, 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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// CPUInfo - fetch CPU information for a remote node.
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func (client *peerRESTClient) CPUInfo(ctx context.Context) (info madmin.ServerCPUInfo, err error) {
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respBody, err := client.callWithContext(ctx, peerRESTMethodCPUInfo, 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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// DiskHwInfo - fetch Disk HW information for a remote node.
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func (client *peerRESTClient) DiskHwInfo(ctx context.Context) (info madmin.ServerDiskHwInfo, err error) {
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respBody, err := client.callWithContext(ctx, peerRESTMethodDiskHwInfo, 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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// OsInfo - fetch OS information for a remote node.
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func (client *peerRESTClient) OsInfo(ctx context.Context) (info madmin.ServerOsInfo, err error) {
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respBody, err := client.callWithContext(ctx, peerRESTMethodOsInfo, 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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// MemInfo - fetch Memory information for a remote node.
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func (client *peerRESTClient) MemInfo(ctx context.Context) (info madmin.ServerMemInfo, err error) {
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respBody, err := client.callWithContext(ctx, peerRESTMethodMemInfo, 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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// ProcInfo - fetch Process information for a remote node.
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func (client *peerRESTClient) ProcInfo(ctx context.Context) (info madmin.ServerProcInfo, err error) {
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respBody, err := client.callWithContext(ctx, peerRESTMethodProcInfo, 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 map[string][]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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// LoadBucketMetadata - load bucket metadata
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func (client *peerRESTClient) LoadBucketMetadata(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(peerRESTMethodLoadBucketMetadata, 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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// DeleteBucketMetadata - Delete bucket metadata
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func (client *peerRESTClient) DeleteBucketMetadata(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(peerRESTMethodDeleteBucketMetadata, 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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// cycleServerBloomFilter will cycle the bloom filter to start recording to index y if not already.
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// The response will contain a bloom filter starting at index x up to, but not including index y.
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// If y is 0, the response will not update y, but return the currently recorded information
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// from the current x to y-1.
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func (client *peerRESTClient) cycleServerBloomFilter(ctx context.Context, req bloomFilterRequest) (*bloomFilterResponse, error) {
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var reader bytes.Buffer
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err := gob.NewEncoder(&reader).Encode(req)
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if err != nil {
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return nil, err
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}
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respBody, err := client.callWithContext(ctx, peerRESTMethodCycleBloom, nil, &reader, -1)
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if err != nil {
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return nil, err
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}
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var resp bloomFilterResponse
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defer http.DrainBody(respBody)
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return &resp, gob.NewDecoder(respBody).Decode(&resp)
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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) {
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values := make(url.Values)
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values.Set(peerRESTPolicy, policyName)
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respBody, err := client.call(peerRESTMethodDeletePolicy, values, 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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return nil
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}
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// LoadPolicy - reload a specific canned policy.
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func (client *peerRESTClient) LoadPolicy(policyName string) (err error) {
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values := make(url.Values)
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values.Set(peerRESTPolicy, policyName)
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respBody, err := client.call(peerRESTMethodLoadPolicy, values, 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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return nil
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}
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// LoadPolicyMapping - reload a specific policy mapping
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func (client *peerRESTClient) LoadPolicyMapping(userOrGroup string, isGroup bool) error {
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values := make(url.Values)
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values.Set(peerRESTUserOrGroup, userOrGroup)
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if isGroup {
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values.Set(peerRESTIsGroup, "")
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}
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respBody, err := client.call(peerRESTMethodLoadPolicyMapping, 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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// DeleteUser - delete a specific user.
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func (client *peerRESTClient) DeleteUser(accessKey string) (err error) {
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values := make(url.Values)
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values.Set(peerRESTUser, accessKey)
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|
|
respBody, err := client.call(peerRESTMethodDeleteUser, values, nil, -1)
|
|
if err != nil {
|
|
return
|
|
}
|
|
defer http.DrainBody(respBody)
|
|
return nil
|
|
}
|
|
|
|
// DeleteServiceAccount - delete a specific service account.
|
|
func (client *peerRESTClient) DeleteServiceAccount(accessKey string) (err error) {
|
|
values := make(url.Values)
|
|
values.Set(peerRESTUser, accessKey)
|
|
|
|
respBody, err := client.call(peerRESTMethodDeleteServiceAccount, 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
|
|
}
|
|
|
|
// LoadServiceAccount - reload a specific service account.
|
|
func (client *peerRESTClient) LoadServiceAccount(accessKey string) (err error) {
|
|
values := make(url.Values)
|
|
values.Set(peerRESTUser, accessKey)
|
|
|
|
respBody, err := client.call(peerRESTMethodLoadServiceAccount, values, 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
|
|
}
|
|
|
|
type serverUpdateInfo struct {
|
|
URL *url.URL
|
|
Sha256Sum []byte
|
|
Time time.Time
|
|
}
|
|
|
|
// ServerUpdate - sends server update message to remote peers.
|
|
func (client *peerRESTClient) ServerUpdate(ctx context.Context, u *url.URL, sha256Sum []byte, lrTime time.Time) error {
|
|
values := make(url.Values)
|
|
var reader bytes.Buffer
|
|
if err := gob.NewEncoder(&reader).Encode(serverUpdateInfo{
|
|
URL: u,
|
|
Sha256Sum: sha256Sum,
|
|
Time: lrTime,
|
|
}); err != nil {
|
|
return err
|
|
}
|
|
respBody, err := client.callWithContext(ctx, peerRESTMethodServerUpdate, values, &reader, -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, strconv.Itoa(int(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
|
|
}
|
|
|
|
// GetLocalDiskIDs - get a peer's local disks' IDs.
|
|
func (client *peerRESTClient) GetLocalDiskIDs(ctx context.Context) (diskIDs []string) {
|
|
respBody, err := client.callWithContext(ctx, peerRESTMethodGetLocalDiskIDs, nil, nil, -1)
|
|
if err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return nil
|
|
}
|
|
defer http.DrainBody(respBody)
|
|
if err = gob.NewDecoder(respBody).Decode(&diskIDs); err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return nil
|
|
}
|
|
return diskIDs
|
|
}
|
|
|
|
// GetMetacacheListing - get a new or existing metacache.
|
|
func (client *peerRESTClient) GetMetacacheListing(ctx context.Context, o listPathOptions) (*metacache, error) {
|
|
var reader bytes.Buffer
|
|
err := gob.NewEncoder(&reader).Encode(o)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
respBody, err := client.callWithContext(ctx, peerRESTMethodGetMetacacheListing, nil, &reader, int64(reader.Len()))
|
|
if err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return nil, err
|
|
}
|
|
var resp metacache
|
|
defer http.DrainBody(respBody)
|
|
return &resp, msgp.Decode(respBody, &resp)
|
|
}
|
|
|
|
// UpdateMetacacheListing - update an existing metacache it will unconditionally be updated to the new state.
|
|
func (client *peerRESTClient) UpdateMetacacheListing(ctx context.Context, m metacache) (metacache, error) {
|
|
b, err := m.MarshalMsg(nil)
|
|
if err != nil {
|
|
return m, err
|
|
}
|
|
respBody, err := client.callWithContext(ctx, peerRESTMethodUpdateMetacacheListing, nil, bytes.NewBuffer(b), int64(len(b)))
|
|
if err != nil {
|
|
logger.LogIf(ctx, err)
|
|
return m, err
|
|
}
|
|
defer http.DrainBody(respBody)
|
|
var resp metacache
|
|
return resp, msgp.Decode(respBody, &resp)
|
|
|
|
}
|
|
|
|
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(GlobalContext)
|
|
|
|
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.
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (client *peerRESTClient) doListen(listenCh chan interface{}, doneCh <-chan struct{}, v url.Values) {
|
|
// To cancel the REST request in case doneCh gets closed.
|
|
ctx, cancel := context.WithCancel(GlobalContext)
|
|
|
|
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, peerRESTMethodListen, v, nil, -1)
|
|
defer http.DrainBody(respBody)
|
|
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
dec := gob.NewDecoder(respBody)
|
|
for {
|
|
var ev event.Event
|
|
if err := dec.Decode(&ev); err != nil {
|
|
return
|
|
}
|
|
if len(ev.EventVersion) > 0 {
|
|
select {
|
|
case listenCh <- ev:
|
|
default:
|
|
// Do not block on slow receivers.
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Listen - listen on peers.
|
|
func (client *peerRESTClient) Listen(listenCh chan interface{}, doneCh <-chan struct{}, v url.Values) {
|
|
go func() {
|
|
for {
|
|
client.doListen(listenCh, doneCh, v)
|
|
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)
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
|
|
// 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)
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
|
|
// ConsoleLog - sends request to peer nodes to get console logs
|
|
func (client *peerRESTClient) ConsoleLog(logCh chan interface{}, doneCh <-chan struct{}) {
|
|
go func() {
|
|
for {
|
|
// get cancellation context to properly unsubscribe peers
|
|
ctx, cancel := context.WithCancel(GlobalContext)
|
|
respBody, err := client.callWithContext(ctx, peerRESTMethodLog, nil, nil, -1)
|
|
if err != nil {
|
|
// Retry the failed request.
|
|
time.Sleep(5 * time.Second)
|
|
} else {
|
|
dec := gob.NewDecoder(respBody)
|
|
|
|
go func() {
|
|
<-doneCh
|
|
cancel()
|
|
}()
|
|
|
|
for {
|
|
var log madmin.LogInfo
|
|
if err = dec.Decode(&log); err != nil {
|
|
break
|
|
}
|
|
select {
|
|
case logCh <- log:
|
|
default:
|
|
}
|
|
}
|
|
}
|
|
|
|
select {
|
|
case <-doneCh:
|
|
cancel()
|
|
http.DrainBody(respBody)
|
|
return
|
|
default:
|
|
// There was error in the REST request, retry.
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
|
|
// newPeerRestClients creates new peer clients.
|
|
// The two slices will point to the same clients,
|
|
// but 'all' will contain nil entry for local client.
|
|
// The 'all' slice will be in the same order across the cluster.
|
|
func newPeerRestClients(endpoints EndpointServerPools) (remote, all []*peerRESTClient) {
|
|
if !globalIsDistErasure {
|
|
// Only useful in distributed setups
|
|
return nil, nil
|
|
}
|
|
hosts := endpoints.hostsSorted()
|
|
remote = make([]*peerRESTClient, 0, len(hosts))
|
|
all = make([]*peerRESTClient, len(hosts))
|
|
for i, host := range hosts {
|
|
if host == nil {
|
|
continue
|
|
}
|
|
all[i] = newPeerRESTClient(host)
|
|
remote = append(remote, all[i])
|
|
}
|
|
if len(all) != len(remote)+1 {
|
|
logger.LogIf(context.Background(), fmt.Errorf("WARNING: Expected number of all hosts (%v) to be remote +1 (%v)", len(all), len(remote)))
|
|
}
|
|
return remote, all
|
|
}
|
|
|
|
// Returns a peer rest client.
|
|
func newPeerRESTClient(peer *xnet.Host) *peerRESTClient {
|
|
scheme := "http"
|
|
if globalIsTLS {
|
|
scheme = "https"
|
|
}
|
|
|
|
serverURL := &url.URL{
|
|
Scheme: scheme,
|
|
Host: peer.String(),
|
|
Path: peerRESTPath,
|
|
}
|
|
|
|
restClient := rest.NewClient(serverURL, globalInternodeTransport, newAuthToken)
|
|
// Use a separate client to avoid recursive calls.
|
|
healthClient := rest.NewClient(serverURL, globalInternodeTransport, newAuthToken)
|
|
healthClient.ExpectTimeouts = true
|
|
|
|
// Construct a new health function.
|
|
restClient.HealthCheckFn = func() bool {
|
|
ctx, cancel := context.WithTimeout(GlobalContext, restClient.HealthCheckTimeout)
|
|
defer cancel()
|
|
respBody, err := healthClient.Call(ctx, peerRESTMethodHealth, nil, nil, -1)
|
|
xhttp.DrainBody(respBody)
|
|
return !isNetworkError(err)
|
|
}
|
|
|
|
return &peerRESTClient{host: peer, restClient: restClient}
|
|
}
|
|
|
|
// MonitorBandwidth - send http trace request to peer nodes
|
|
func (client *peerRESTClient) MonitorBandwidth(ctx context.Context, buckets []string) (*bandwidth.Report, error) {
|
|
values := make(url.Values)
|
|
values.Set(peerRESTBuckets, strings.Join(buckets, ","))
|
|
respBody, err := client.callWithContext(ctx, peerRESTMethodGetBandwidth, values, nil, -1)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer http.DrainBody(respBody)
|
|
|
|
dec := gob.NewDecoder(respBody)
|
|
var bandwidthReport bandwidth.Report
|
|
err = dec.Decode(&bandwidthReport)
|
|
return &bandwidthReport, err
|
|
}
|
|
|
|
func (client *peerRESTClient) GetPeerMetrics(ctx context.Context) (<-chan Metric, error) {
|
|
respBody, err := client.callWithContext(ctx, peerRESTMethodGetPeerMetrics, nil, nil, -1)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
dec := gob.NewDecoder(respBody)
|
|
ch := make(chan Metric)
|
|
go func(ch chan<- Metric) {
|
|
for {
|
|
var metric Metric
|
|
if err := dec.Decode(&metric); err != nil {
|
|
http.DrainBody(respBody)
|
|
close(ch)
|
|
return
|
|
}
|
|
ch <- metric
|
|
}
|
|
}(ch)
|
|
return ch, nil
|
|
}
|