mirror of https://github.com/minio/minio.git
143 lines
3.9 KiB
Go
143 lines
3.9 KiB
Go
/*
|
|
* MinIO Cloud Storage, (C) 2019 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 (
|
|
ring "container/ring"
|
|
"context"
|
|
"sync"
|
|
|
|
"github.com/minio/minio/cmd/logger"
|
|
"github.com/minio/minio/cmd/logger/message/log"
|
|
"github.com/minio/minio/cmd/logger/target/console"
|
|
"github.com/minio/minio/pkg/madmin"
|
|
xnet "github.com/minio/minio/pkg/net"
|
|
"github.com/minio/minio/pkg/pubsub"
|
|
)
|
|
|
|
// number of log messages to buffer
|
|
const defaultLogBufferCount = 10000
|
|
|
|
//HTTPConsoleLoggerSys holds global console logger state
|
|
type HTTPConsoleLoggerSys struct {
|
|
pubsub *pubsub.PubSub
|
|
console *console.Target
|
|
nodeName string
|
|
// To protect ring buffer.
|
|
logBufLk sync.RWMutex
|
|
logBuf *ring.Ring
|
|
}
|
|
|
|
// NewConsoleLogger - creates new HTTPConsoleLoggerSys with all nodes subscribed to
|
|
// the console logging pub sub system
|
|
func NewConsoleLogger(ctx context.Context, endpoints EndpointList) *HTTPConsoleLoggerSys {
|
|
host, err := xnet.ParseHost(GetLocalPeer(globalEndpoints))
|
|
if err != nil {
|
|
logger.FatalIf(err, "Unable to start console logging subsystem")
|
|
}
|
|
var nodeName string
|
|
if globalIsDistXL {
|
|
nodeName = host.Name
|
|
}
|
|
ps := pubsub.New()
|
|
return &HTTPConsoleLoggerSys{
|
|
ps, nil, nodeName, sync.RWMutex{}, ring.New(defaultLogBufferCount),
|
|
}
|
|
}
|
|
|
|
// HasLogListeners returns true if console log listeners are registered
|
|
// for this node or peers
|
|
func (sys *HTTPConsoleLoggerSys) HasLogListeners() bool {
|
|
return sys != nil && sys.pubsub.HasSubscribers()
|
|
}
|
|
|
|
// Subscribe starts console logging for this node.
|
|
func (sys *HTTPConsoleLoggerSys) Subscribe(subCh chan interface{}, doneCh chan struct{}, node string, last int, filter func(entry interface{}) bool) {
|
|
// Enable console logging for remote client even if local console logging is disabled in the config.
|
|
if !globalServerConfig.Logger.Console.Enabled && !sys.pubsub.HasSubscribers() {
|
|
logger.AddTarget(globalConsoleSys.Console())
|
|
}
|
|
|
|
cnt := 0
|
|
// by default send all console logs in the ring buffer unless node or limit query parameters
|
|
// are set.
|
|
var lastN []madmin.LogInfo
|
|
if last > defaultLogBufferCount || last <= 0 {
|
|
last = defaultLogBufferCount
|
|
}
|
|
|
|
lastN = make([]madmin.LogInfo, last)
|
|
sys.logBufLk.RLock()
|
|
sys.logBuf.Do(func(p interface{}) {
|
|
if p != nil && (p.(madmin.LogInfo)).SendLog(node) {
|
|
lastN[cnt%last] = p.(madmin.LogInfo)
|
|
cnt++
|
|
}
|
|
})
|
|
sys.logBufLk.RUnlock()
|
|
// send last n console log messages in order filtered by node
|
|
if cnt > 0 {
|
|
for i := 0; i < last; i++ {
|
|
entry := lastN[(cnt+i)%last]
|
|
if (entry == madmin.LogInfo{}) {
|
|
continue
|
|
}
|
|
select {
|
|
case subCh <- entry:
|
|
case <-doneCh:
|
|
return
|
|
}
|
|
}
|
|
}
|
|
sys.pubsub.Subscribe(subCh, doneCh, filter)
|
|
}
|
|
|
|
// Console returns a console target
|
|
func (sys *HTTPConsoleLoggerSys) Console() *HTTPConsoleLoggerSys {
|
|
if sys == nil {
|
|
return sys
|
|
}
|
|
if sys.console == nil {
|
|
sys.console = console.New()
|
|
}
|
|
return sys
|
|
}
|
|
|
|
// Send log message 'e' to console and publish to console
|
|
// log pubsub system
|
|
func (sys *HTTPConsoleLoggerSys) Send(e interface{}) error {
|
|
var lg madmin.LogInfo
|
|
switch e := e.(type) {
|
|
case log.Entry:
|
|
lg = madmin.LogInfo{Entry: e, NodeName: sys.nodeName}
|
|
case string:
|
|
lg = madmin.LogInfo{ConsoleMsg: e, NodeName: sys.nodeName}
|
|
}
|
|
|
|
sys.pubsub.Publish(lg)
|
|
sys.logBufLk.Lock()
|
|
// add log to ring buffer
|
|
sys.logBuf.Value = lg
|
|
sys.logBuf = sys.logBuf.Next()
|
|
sys.logBufLk.Unlock()
|
|
|
|
if globalServerConfig.Logger.Console.Enabled {
|
|
return sys.console.Send(e)
|
|
}
|
|
return nil
|
|
}
|