github.com/oam-dev/kubevela@v1.9.11/pkg/monitor/watcher/application.go (about)

     1  /*
     2  Copyright 2022 The KubeVela Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  	http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package watcher
    18  
    19  import (
    20  	"encoding/json"
    21  	"fmt"
    22  	"strings"
    23  	"sync"
    24  	"time"
    25  
    26  	"k8s.io/client-go/tools/cache"
    27  	"k8s.io/klog/v2"
    28  	ctrlcache "sigs.k8s.io/controller-runtime/pkg/cache"
    29  
    30  	"github.com/oam-dev/kubevela/apis/core.oam.dev/v1beta1"
    31  	"github.com/oam-dev/kubevela/pkg/monitor/metrics"
    32  )
    33  
    34  type applicationMetricsWatcher struct {
    35  	mu               sync.Mutex
    36  	phaseCounter     map[string]int
    37  	stepPhaseCounter map[string]int
    38  	phaseDirty       map[string]struct{}
    39  	stepPhaseDirty   map[string]struct{}
    40  	informer         ctrlcache.Informer
    41  	stopCh           chan struct{}
    42  }
    43  
    44  func (watcher *applicationMetricsWatcher) getApp(obj interface{}) *v1beta1.Application {
    45  	app := &v1beta1.Application{}
    46  	bs, _ := json.Marshal(obj)
    47  	_ = json.Unmarshal(bs, app)
    48  	return app
    49  }
    50  
    51  func (watcher *applicationMetricsWatcher) getPhase(phase string) string {
    52  	if phase == "" {
    53  		return "-"
    54  	}
    55  	return phase
    56  }
    57  
    58  func (watcher *applicationMetricsWatcher) inc(app *v1beta1.Application, delta int) {
    59  	watcher.mu.Lock()
    60  	defer watcher.mu.Unlock()
    61  	phase := watcher.getPhase(string(app.Status.Phase))
    62  	watcher.phaseCounter[phase] += delta
    63  	watcher.phaseDirty[phase] = struct{}{}
    64  	if app.Status.Workflow != nil {
    65  		for _, step := range app.Status.Workflow.Steps {
    66  			stepPhase := watcher.getPhase(string(step.Phase))
    67  			key := fmt.Sprintf("%s/%s#%s", step.Type, stepPhase, step.Reason)
    68  			watcher.stepPhaseCounter[key] += delta
    69  			watcher.stepPhaseDirty[key] = struct{}{}
    70  		}
    71  	}
    72  }
    73  
    74  func (watcher *applicationMetricsWatcher) report() {
    75  	watcher.mu.Lock()
    76  	defer watcher.mu.Unlock()
    77  	for phase := range watcher.phaseDirty {
    78  		metrics.ApplicationPhaseCounter.WithLabelValues(phase).Set(float64(watcher.phaseCounter[phase]))
    79  	}
    80  	for stepPhase := range watcher.stepPhaseDirty {
    81  		metrics.WorkflowStepPhaseGauge.WithLabelValues(strings.Split(stepPhase, "/")[:2]...).Set(float64(watcher.stepPhaseCounter[stepPhase]))
    82  	}
    83  	watcher.phaseDirty = map[string]struct{}{}
    84  	watcher.stepPhaseDirty = map[string]struct{}{}
    85  }
    86  
    87  func (watcher *applicationMetricsWatcher) run() {
    88  	go func() {
    89  		for {
    90  			select {
    91  			case <-watcher.stopCh:
    92  				return
    93  			default:
    94  				time.Sleep(time.Second)
    95  				watcher.report()
    96  			}
    97  		}
    98  	}()
    99  }
   100  
   101  // StartApplicationMetricsWatcher start metrics watcher for reporting application stats
   102  func StartApplicationMetricsWatcher(informer ctrlcache.Informer) {
   103  	watcher := &applicationMetricsWatcher{
   104  		phaseCounter:     map[string]int{},
   105  		stepPhaseCounter: map[string]int{},
   106  		phaseDirty:       map[string]struct{}{},
   107  		stepPhaseDirty:   map[string]struct{}{},
   108  		informer:         informer,
   109  		stopCh:           make(chan struct{}, 1),
   110  	}
   111  	_, err := watcher.informer.AddEventHandler(cache.ResourceEventHandlerFuncs{
   112  		AddFunc: func(obj interface{}) {
   113  			app := watcher.getApp(obj)
   114  			watcher.inc(app, 1)
   115  		},
   116  		UpdateFunc: func(oldObj, obj interface{}) {
   117  			oldApp := watcher.getApp(oldObj)
   118  			app := watcher.getApp(obj)
   119  			watcher.inc(oldApp, -1)
   120  			watcher.inc(app, 1)
   121  		},
   122  		DeleteFunc: func(obj interface{}) {
   123  			app := watcher.getApp(obj)
   124  			watcher.inc(app, -1)
   125  		},
   126  	})
   127  	if err != nil {
   128  		klog.ErrorS(err, "failed to add event handler for application metrics watcher")
   129  	}
   130  	watcher.run()
   131  }