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Merge pull request #3 from SOF3/aggregator-update-trigger
feat(aggregator): add update-trigger
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| package constants | ||
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| import "github.com/kubewharf/podseidon/util/kube" | ||
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| const ( | ||
| CoreClusterName kube.ClusterName = "core" | ||
| WorkerClusterName kube.ClusterName = "worker" | ||
| ) | ||
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| const LeaderPhase kube.InformerPhase = "main" | ||
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| const ElectorName kube.ElectorName = "aggregator" | ||
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| var ElectorArgs = kube.ElectorArgs{ | ||
| ClusterName: WorkerClusterName, | ||
| ElectorName: ElectorName, | ||
| } | ||
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| const AnnotUpdateTriggerTime string = "podseidon.kubewharf.io/update-trigger-time" |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,174 @@ | ||
| package updatetrigger | ||
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| import ( | ||
| "context" | ||
| "flag" | ||
| "strings" | ||
| "time" | ||
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| corev1 "k8s.io/api/core/v1" | ||
| apierrors "k8s.io/apimachinery/pkg/api/errors" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/types" | ||
| "k8s.io/apimachinery/pkg/util/json" | ||
| "k8s.io/apimachinery/pkg/util/wait" | ||
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| "github.com/kubewharf/podseidon/util/component" | ||
| "github.com/kubewharf/podseidon/util/errors" | ||
| utilflag "github.com/kubewharf/podseidon/util/flag" | ||
| "github.com/kubewharf/podseidon/util/kube" | ||
| "github.com/kubewharf/podseidon/util/o11y" | ||
| "github.com/kubewharf/podseidon/util/util" | ||
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| "github.com/kubewharf/podseidon/aggregator/constants" | ||
| "github.com/kubewharf/podseidon/aggregator/observer" | ||
| ) | ||
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| var New = component.Declare( | ||
| func(Args) string { return "update-trigger" }, | ||
| func(_ Args, fs *flag.FlagSet) Options { | ||
| return Options{ | ||
| Enable: fs.Bool("enable", false, "trigger a dummy pod update periodically to keep the watch stream alive"), | ||
| UpdateFrequency: fs.Duration("update-frequency", time.Second, "frequency of generated update requests"), | ||
| PodName: fs.String("dummy-pod-name", "podseidon-update-trigger", "name of the dummy pod"), | ||
| PodNamespace: fs.String("dummy-pod-namespace", metav1.NamespaceAll, "namespace of the dummy pod"), | ||
| PodLabels: utilflag.Map( | ||
| fs, "dummy-pod-labels", map[string]string{}, "labels of the dummy pod", | ||
| utilflag.StringParser, utilflag.StringParser, | ||
| ), | ||
| PodAnnotations: utilflag.Map( | ||
| fs, "dummy-pod-annotations", map[string]string{}, "annotations of the dummy pod", | ||
| utilflag.StringParser, utilflag.StringParser, | ||
| ), | ||
| PodImage: fs.String("dummy-pod-image", ":", "image field of the dummy pod; would not get pulled if pod is not scheduled"), | ||
| PodScheduler: fs.String( | ||
| "dummy-pod-scheduler", | ||
| "do-not-schedule", | ||
| "schedulerName field of the dummy pod; keep unchanged to avoid scheduling the pod to a node", | ||
| ), | ||
| } | ||
| }, | ||
| func(_ Args, requests *component.DepRequests) Deps { | ||
| return Deps{ | ||
| workerClient: component.DepPtr( | ||
| requests, | ||
| kube.NewClient(kube.ClientArgs{ClusterName: constants.WorkerClusterName}), | ||
| ), | ||
| elector: component.DepPtr(requests, kube.NewElector(constants.ElectorArgs)), | ||
| observer: o11y.Request[observer.Observer](requests), | ||
| } | ||
| }, | ||
| func(context.Context, Args, Options, Deps) (*State, error) { | ||
| return &State{}, nil | ||
| }, | ||
| component.Lifecycle[Args, Options, Deps, State]{ | ||
| Start: func(ctx context.Context, _ *Args, options *Options, deps *Deps, _ *State) error { | ||
| if !*options.Enable { | ||
| return nil | ||
| } | ||
|
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| go func() { | ||
| ctx, err := deps.elector.Get().Await(ctx) | ||
| if err != nil { | ||
| return | ||
| } | ||
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| spin := spinCreate | ||
| obs := func(err error) { | ||
| deps.observer.Get().TriggerPodCreate(ctx, observer.TriggerPodCreate{Err: err}) | ||
| } | ||
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| wait.UntilWithContext(ctx, func(ctx context.Context) { | ||
| err := spin(ctx, deps.workerClient.Get(), options) | ||
| obs(err) | ||
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| if err == nil { | ||
| spin = spinUpdate | ||
| obs = func(err error) { | ||
| deps.observer.Get().TriggerPodUpdate(ctx, observer.TriggerPodUpdate{Err: err}) | ||
| } | ||
| } | ||
| }, *options.UpdateFrequency) | ||
| }() | ||
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| return nil | ||
| }, | ||
| Join: nil, | ||
| HealthChecks: nil, | ||
| }, | ||
| func(*component.Data[Args, Options, Deps, State]) util.Empty { | ||
| return util.Empty{} | ||
| }, | ||
| ) | ||
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| type Args struct{} | ||
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| type Options struct { | ||
| Enable *bool | ||
| UpdateFrequency *time.Duration | ||
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| PodName *string | ||
| PodNamespace *string | ||
| PodLabels *map[string]string | ||
| PodAnnotations *map[string]string | ||
| PodImage *string | ||
| PodScheduler *string | ||
| } | ||
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| type Deps struct { | ||
| workerClient component.Dep[*kube.Client] | ||
| elector component.Dep[*kube.Elector] | ||
| observer component.Dep[observer.Observer] | ||
| } | ||
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| type State struct{} | ||
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| func spinCreate(ctx context.Context, client *kube.Client, options *Options) error { | ||
| annotations := map[string]string{ | ||
| constants.AnnotUpdateTriggerTime: time.Now().Format(time.RFC3339Nano), | ||
| } | ||
| for k, v := range *options.PodAnnotations { | ||
| annotations[k] = v | ||
| } | ||
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| _, err := client.NativeClientSet().CoreV1().Pods(*options.PodNamespace).Create(ctx, &corev1.Pod{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Namespace: *options.PodNamespace, | ||
| Name: *options.PodName, | ||
| Labels: *options.PodLabels, | ||
| Annotations: *options.PodAnnotations, | ||
| }, | ||
| Spec: corev1.PodSpec{ | ||
| Containers: []corev1.Container{ | ||
| {Name: "main", Image: *options.PodImage}, | ||
| }, | ||
| SchedulerName: *options.PodScheduler, | ||
| }, | ||
| }, metav1.CreateOptions{}) | ||
| if err != nil && !apierrors.IsAlreadyExists(err) { | ||
| return errors.TagWrapf("CreatePod", err, "create trigger pod on worker apiserver") | ||
| } | ||
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| return nil | ||
| } | ||
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| func spinUpdate(ctx context.Context, client *kube.Client, options *Options) error { | ||
| patchJson, err := json.Marshal([]map[string]string{{ | ||
| "op": "replace", | ||
| "path": "/metadata/annotations/" + strings.ReplaceAll(constants.AnnotUpdateTriggerTime, "/", "~1"), | ||
| "value": time.Now().Format(time.RFC3339Nano), | ||
| }}) | ||
| if err != nil { | ||
| return errors.TagWrapf("EncodePatch", err, "encode patch json") | ||
| } | ||
|
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| _, err = client.NativeClientSet(). | ||
| CoreV1(). | ||
| Pods(*options.PodNamespace). | ||
| Patch(ctx, *options.PodName, types.JSONPatchType, patchJson, metav1.PatchOptions{}) | ||
| if err != nil { | ||
| return errors.TagWrapf("PatchPod", err, "patch trigger pod on worker apiserver") | ||
| } | ||
|
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| return nil | ||
| } |
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