| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package k8s_state |
| 4 | |
| 5 | import ( |
| 6 | "context" |
| 7 | |
| 8 | "k8s.io/client-go/tools/cache" |
| 9 | "k8s.io/client-go/util/workqueue" |
| 10 | |
| 11 | "github.com/netdata/netdata/go/plugins/logger" |
| 12 | ) |
| 13 | |
| 14 | func newDeploymentDiscoverer(si cache.SharedInformer, l *logger.Logger) *deploymentDiscoverer { |
| 15 | if si == nil { |
| 16 | panic("nil deployment& shared informer") |
| 17 | } |
| 18 | |
| 19 | queue := workqueue.NewTypedWithConfig(workqueue.TypedQueueConfig[string]{Name: "replicaset"}) |
| 20 | |
| 21 | _, _ = si.AddEventHandler(cache.ResourceEventHandlerFuncs{ |
| 22 | AddFunc: func(obj any) { enqueue(queue, obj) }, |
| 23 | UpdateFunc: func(_, obj any) { enqueue(queue, obj) }, |
| 24 | DeleteFunc: func(obj any) { enqueue(queue, obj) }, |
| 25 | }) |
| 26 | |
| 27 | return &deploymentDiscoverer{ |
| 28 | Logger: l, |
| 29 | informer: si, |
| 30 | queue: queue, |
| 31 | readyCh: make(chan struct{}), |
| 32 | stopCh: make(chan struct{}), |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | type deployResource struct { |
| 37 | src string |
| 38 | val any |
| 39 | } |
| 40 | |
| 41 | func (r deployResource) source() string { return r.src } |
| 42 | func (r deployResource) kind() kubeResourceKind { return kubeResourceDeployment } |
| 43 | func (r deployResource) value() any { return r.val } |
| 44 | |
| 45 | type deploymentDiscoverer struct { |
| 46 | *logger.Logger |
| 47 | informer cache.SharedInformer |
| 48 | queue *workqueue.Typed[string] |
| 49 | readyCh chan struct{} |
| 50 | stopCh chan struct{} |
| 51 | } |
| 52 | |
| 53 | func (d *deploymentDiscoverer) run(ctx context.Context, in chan<- resource) { |
| 54 | d.Info("deployment_discoverer is started") |
| 55 | defer func() { close(d.stopCh); d.Info("deployment_discoverer is stopped") }() |
| 56 | |
| 57 | defer d.queue.ShutDown() |
| 58 | |
| 59 | go d.informer.Run(ctx.Done()) |
| 60 | |
| 61 | if !cache.WaitForCacheSync(ctx.Done(), d.informer.HasSynced) { |
| 62 | return |
| 63 | } |
| 64 | |
| 65 | go d.runDiscover(ctx, in) |
| 66 | |
| 67 | close(d.readyCh) |
| 68 | |
| 69 | <-ctx.Done() |
| 70 | } |
| 71 | |
| 72 | func (d *deploymentDiscoverer) ready() bool { return isChanClosed(d.readyCh) } |
| 73 | func (d *deploymentDiscoverer) stopped() bool { return isChanClosed(d.stopCh) } |
| 74 | |
| 75 | func (d *deploymentDiscoverer) runDiscover(ctx context.Context, in chan<- resource) { |
| 76 | for { |
| 77 | key, shutdown := d.queue.Get() |
| 78 | if shutdown { |
| 79 | return |
| 80 | } |
| 81 | |
| 82 | func() { |
| 83 | defer d.queue.Done(key) |
| 84 | |
| 85 | ns, name, err := cache.SplitMetaNamespaceKey(key) |
| 86 | if err != nil { |
| 87 | return |
| 88 | } |
| 89 | |
| 90 | item, exists, err := d.informer.GetStore().GetByKey(key) |
| 91 | if err != nil { |
| 92 | return |
| 93 | } |
| 94 | |
| 95 | r := &deployResource{src: deploymentSource(ns, name)} |
| 96 | if exists { |
| 97 | r.val = item |
| 98 | } |
| 99 | send(ctx, in, r) |
| 100 | }() |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | func deploymentSource(namespace, name string) string { |
| 105 | return "k8s/rs/" + namespace + "/" + name |
| 106 | } |