github.com/aclisp/heapster@v0.19.2-0.20160613100040-51756f899a96/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  	gce_util "k8s.io/heapster/common/gce"
    23  	"k8s.io/heapster/events/core"
    24  
    25  	"github.com/golang/glog"
    26  	"golang.org/x/oauth2"
    27  	"golang.org/x/oauth2/google"
    28  	gcl "google.golang.org/api/logging/v2beta1"
    29  	gce "google.golang.org/cloud/compute/metadata"
    30  )
    31  
    32  const (
    33  	monitoredResourceType = "global"
    34  	logName               = "kubernetes.io/events"
    35  	loggingSeverity       = "NOTICE"
    36  )
    37  
    38  type gclSink struct {
    39  	project    string
    40  	gclService *gcl.Service
    41  }
    42  
    43  func (sink *gclSink) ExportEvents(eventBatch *core.EventBatch) {
    44  	if len(eventBatch.Events) == 0 {
    45  		glog.V(4).Info("Not events to export")
    46  		return
    47  	}
    48  	glog.V(4).Info("Exporting events")
    49  	entries := make([]*gcl.LogEntry, len(eventBatch.Events))
    50  	for i, event := range eventBatch.Events {
    51  		entries[i] = &gcl.LogEntry{
    52  			LogName:     fmt.Sprintf("projects/%s/logs/%s", sink.project, url.QueryEscape(logName)),
    53  			Timestamp:   event.LastTimestamp.Time.UTC().Format(time.RFC3339),
    54  			Severity:    loggingSeverity,
    55  			Resource:    &gcl.MonitoredResource{Type: monitoredResourceType},
    56  			InsertId:    string(event.UID),
    57  			JsonPayload: *event,
    58  		}
    59  	}
    60  	req := &gcl.WriteLogEntriesRequest{Entries: entries}
    61  	if _, err := sink.gclService.Entries.Write(req).Do(); err != nil {
    62  		glog.Errorf("Error while exporting events to GCL: %v", err)
    63  	} else {
    64  		glog.V(4).Infof("Sucessfully exported %d events", len(entries))
    65  	}
    66  }
    67  
    68  func (sink *gclSink) Name() string {
    69  	return "GCL Sink"
    70  }
    71  
    72  func (sink *gclSink) Stop() {
    73  	// nothing needs to be done.
    74  }
    75  
    76  func CreateGCLSink(uri *url.URL) (core.EventSink, error) {
    77  	if err := gce_util.EnsureOnGCE(); err != nil {
    78  		return nil, err
    79  	}
    80  
    81  	// Detect project ID
    82  	projectId, err := gce.ProjectID()
    83  	if err != nil {
    84  		return nil, err
    85  	}
    86  
    87  	// Create Google Cloud Logging service.
    88  	client := oauth2.NewClient(oauth2.NoContext, google.ComputeTokenSource(""))
    89  	gclService, err := gcl.New(client)
    90  	if err != nil {
    91  		return nil, err
    92  	}
    93  
    94  	sink := &gclSink{project: projectId, gclService: gclService}
    95  	glog.Info("created GCL sink")
    96  	return sink, nil
    97  }