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Merge pull request #2 from SOF3/add-generator-monitor
feat(generator): add global podprotector monitor metrics
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,162 @@ | ||
| // Copyright 2024 The Podseidon Authors. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| // Reports global metrics about all PodProtector objects. | ||
| package monitor | ||
|
|
||
| import ( | ||
| "context" | ||
| "flag" | ||
| "sync" | ||
|
|
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| "k8s.io/apimachinery/pkg/types" | ||
|
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| podseidonv1a1 "github.com/kubewharf/podseidon/apis/v1alpha1" | ||
| podseidoninformers "github.com/kubewharf/podseidon/client/informers/externalversions" | ||
|
|
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| "github.com/kubewharf/podseidon/util/component" | ||
| "github.com/kubewharf/podseidon/util/errors" | ||
| "github.com/kubewharf/podseidon/util/kube" | ||
| "github.com/kubewharf/podseidon/util/o11y" | ||
| "github.com/kubewharf/podseidon/util/optional" | ||
| "github.com/kubewharf/podseidon/util/util" | ||
|
|
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| "github.com/kubewharf/podseidon/generator/constants" | ||
| "github.com/kubewharf/podseidon/generator/observer" | ||
| ) | ||
|
|
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| const ProportionPpmUnits = 1000000 | ||
|
|
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| var New = component.Declare[Args, Options, Deps, State, util.Empty]( | ||
| func(Args) string { return "generator-monitor" }, | ||
| func(_ Args, fs *flag.FlagSet) Options { | ||
| return Options{ | ||
| Enable: fs.Bool("enable", true, "Enable global PodProtector monitor"), | ||
| } | ||
| }, | ||
| func(_ Args, requests *component.DepRequests) Deps { | ||
| return Deps{ | ||
| observer: o11y.Request[observer.Observer](requests), | ||
| podseidonInformers: component.DepPtr(requests, kube.NewInformers(kube.PodseidonInformers( | ||
| constants.CoreClusterName, | ||
| constants.LeaderPhase, | ||
| optional.Some(constants.GeneratorElectorArgs), | ||
| ))), | ||
| } | ||
| }, | ||
| func(_ context.Context, _ Args, options Options, deps Deps) (*State, error) { | ||
| state := &State{ | ||
| statusMu: sync.Mutex{}, | ||
| status: util.Zero[observer.MonitorWorkloads](), | ||
| addedDeltaCache: map[types.NamespacedName]observer.MonitorWorkloads{}, | ||
| } | ||
|
|
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| if *options.Enable { | ||
| pprInformer := deps.podseidonInformers.Get().Podseidon().V1alpha1().PodProtectors() | ||
| _, err := pprInformer.Informer().AddEventHandler(kube.GenericEventHandlerWithStaleState( | ||
| func(ppr *podseidonv1a1.PodProtector, stillPresent bool) { | ||
| nsName := types.NamespacedName{Namespace: ppr.Namespace, Name: ppr.Name} | ||
|
|
||
| if stillPresent { | ||
| status := pprToStatus(ppr) | ||
| state.add(nsName, status) | ||
| } else { | ||
| state.remove(nsName) | ||
| } | ||
| }, | ||
| )) | ||
| if err != nil { | ||
| return nil, errors.TagWrapf("AddEventHandler", err, "add event handler to ppr informer") | ||
| } | ||
| } | ||
|
|
||
| return state, nil | ||
| }, | ||
| component.Lifecycle[Args, Options, Deps, State]{ | ||
| Start: func(ctx context.Context, _ *Args, options *Options, deps *Deps, state *State) error { | ||
| if *options.Enable { | ||
| deps.observer.Get().MonitorWorkloads(ctx, util.Empty{}, func() observer.MonitorWorkloads { | ||
| state.statusMu.Lock() | ||
| defer state.statusMu.Unlock() | ||
|
|
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| return state.status | ||
| }) | ||
| } | ||
|
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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 | ||
| } | ||
|
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| type Deps struct { | ||
| observer component.Dep[observer.Observer] | ||
| podseidonInformers component.Dep[podseidoninformers.SharedInformerFactory] | ||
| } | ||
|
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| type State struct { | ||
| statusMu sync.Mutex | ||
| status observer.MonitorWorkloads | ||
|
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| addedDeltaCache map[types.NamespacedName]observer.MonitorWorkloads | ||
| } | ||
|
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| func pprToStatus(ppr *podseidonv1a1.PodProtector) observer.MonitorWorkloads { | ||
| availableProportionPpm := int64(0) | ||
| if ppr.Spec.MinAvailable > 0 { | ||
| availableProportionPpm = min(ProportionPpmUnits, util.RoundedIntDiv( | ||
| int64(ppr.Status.Summary.AggregatedAvailable)*ProportionPpmUnits, | ||
| int64(ppr.Spec.MinAvailable), | ||
| )) | ||
| } | ||
|
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| return observer.MonitorWorkloads{ | ||
| NumWorkloads: 1, | ||
| MinAvailable: int64(ppr.Spec.MinAvailable), | ||
| TotalReplicas: int64(ppr.Status.Summary.Total), | ||
| AggregatedAvailableReplicas: int64(ppr.Status.Summary.AggregatedAvailable), | ||
| EstimatedAvailableReplicas: int64(ppr.Status.Summary.EstimatedAvailable), | ||
| SumAvailableProportionPpm: availableProportionPpm, | ||
| SumLatencyMillis: ppr.Status.Summary.MaxLatencyMillis, | ||
| } | ||
| } | ||
|
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| func (state *State) add(nsName types.NamespacedName, newDelta observer.MonitorWorkloads) { | ||
| old := state.addedDeltaCache[nsName] // use zero value if absent | ||
| state.addedDeltaCache[nsName] = newDelta | ||
|
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| state.statusMu.Lock() | ||
| defer state.statusMu.Unlock() | ||
|
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| state.status.Subtract(old) | ||
| state.status.Add(newDelta) | ||
| } | ||
|
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| func (state *State) remove(nsName types.NamespacedName) { | ||
| old := state.addedDeltaCache[nsName] | ||
| delete(state.addedDeltaCache, nsName) | ||
|
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| state.statusMu.Lock() | ||
| defer state.statusMu.Unlock() | ||
|
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| state.status.Subtract(old) | ||
| } |
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