github.com/timstclair/heapster@v0.20.0-alpha1/events/sinks/gcl/gcl.go (about)

     1  // Copyright 2015 Google Inc. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package gcl
    16  
    17  import (
    18  	"fmt"
    19  	"net/url"
    20  	"time"
    21  
    22  	"k8s.io/heapster/events/core"
    23  
    24  	"github.com/golang/glog"
    25  	"golang.org/x/oauth2"
    26  	"golang.org/x/oauth2/google"
    27  	gcl "google.golang.org/api/logging/v2beta1"
    28  	gce "google.golang.org/cloud/compute/metadata"
    29  )
    30  
    31  const (
    32  	monitoredResourceType = "global"
    33  	logName               = "kubernetes.io/events"
    34  	loggingSeverity       = "NOTICE"
    35  )
    36  
    37  type gclSink struct {
    38  	project    string
    39  	gclService *gcl.Service
    40  }
    41  
    42  func (sink *gclSink) ExportEvents(eventBatch *core.EventBatch) {
    43  	if len(eventBatch.Events) == 0 {
    44  		glog.V(4).Info("Not events to export")
    45  		return
    46  	}
    47  	glog.V(4).Info("Exporting events")
    48  	entries := make([]*gcl.LogEntry, len(eventBatch.Events))
    49  	for i, event := range eventBatch.Events {
    50  		entries[i] = &gcl.LogEntry{
    51  			LogName:     fmt.Sprintf("projects/%s/logs/%s", sink.project, url.QueryEscape(logName)),
    52  			Timestamp:   event.LastTimestamp.Time.UTC().Format(time.RFC3339),
    53  			Severity:    loggingSeverity,
    54  			Resource:    &gcl.MonitoredResource{Type: monitoredResourceType},
    55  			InsertId:    string(event.UID),
    56  			JsonPayload: *event,
    57  		}
    58  	}
    59  	req := &gcl.WriteLogEntriesRequest{Entries: entries}
    60  	if _, err := sink.gclService.Entries.Write(req).Do(); err != nil {
    61  		glog.Errorf("Error while exporting events to GCL: %v", err)
    62  	} else {
    63  		glog.V(4).Infof("Sucessfully exported %d events", len(entries))
    64  	}
    65  }
    66  
    67  func (sink *gclSink) Name() string {
    68  	return "GCL Sink"
    69  }
    70  
    71  func (sink *gclSink) Stop() {
    72  	// nothing needs to be done.
    73  }
    74  
    75  func CreateGCLSink(uri *url.URL) (core.EventSink, error) {
    76  	// Detect project ID
    77  	projectId, err := gce.ProjectID()
    78  	if err != nil {
    79  		return nil, err
    80  	}
    81  
    82  	// Create Google Cloud Logging service.
    83  	client := oauth2.NewClient(oauth2.NoContext, google.ComputeTokenSource(""))
    84  	gclService, err := gcl.New(client)
    85  	if err != nil {
    86  		return nil, err
    87  	}
    88  
    89  	sink := &gclSink{project: projectId, gclService: gclService}
    90  	glog.Info("created GCL sink")
    91  	return sink, nil
    92  }