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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| // Unless explicitly stated otherwise all files in this repository are licensed | ||
| // under the Apache License Version 2.0. | ||
| // This product includes software developed at Datadog (https://www.datadoghq.com/). | ||
| // Copyright 2016-present Datadog, Inc. | ||
|
|
||
| // Package tags holds tags related files | ||
| package tags | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "time" | ||
|
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| "github.com/DataDog/datadog-agent/comp/core/tagger/taggerimpl/remote" | ||
| taggerTelemetry "github.com/DataDog/datadog-agent/comp/core/tagger/telemetry" | ||
| "github.com/DataDog/datadog-agent/comp/core/tagger/types" | ||
| "github.com/DataDog/datadog-agent/comp/core/telemetry" | ||
| pkgconfigsetup "github.com/DataDog/datadog-agent/pkg/config/setup" | ||
| "github.com/DataDog/datadog-agent/pkg/security/probe/config" | ||
| "github.com/DataDog/datadog-agent/pkg/security/resolvers/cgroup" | ||
| cgroupModel "github.com/DataDog/datadog-agent/pkg/security/resolvers/cgroup/model" | ||
| "github.com/DataDog/datadog-agent/pkg/util/log" | ||
| ) | ||
|
|
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| // Listener is used to propagate tags events | ||
| type Listener func(workload *cgroupModel.CacheEntry) | ||
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| // LinuxResolver represents a default resolver based directly on the underlying tagger | ||
| type LinuxResolver struct { | ||
| *DefaultResolver | ||
| workloadsWithoutTags chan *cgroupModel.CacheEntry | ||
| cgroupResolver *cgroup.Resolver | ||
| } | ||
|
|
||
| // Start the resolver | ||
| func (t *LinuxResolver) Start(ctx context.Context) error { | ||
| if err := t.DefaultResolver.Start(ctx); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if err := t.cgroupResolver.RegisterListener(cgroup.CGroupCreated, t.checkTags); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| go func() { | ||
| ctx, cancel := context.WithCancel(ctx) | ||
| defer cancel() | ||
|
|
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| delayerTick := time.NewTicker(10 * time.Second) | ||
| defer delayerTick.Stop() | ||
|
|
||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return | ||
| case <-delayerTick.C: | ||
| select { | ||
| case workload := <-t.workloadsWithoutTags: | ||
| t.checkTags(workload) | ||
| default: | ||
| } | ||
|
|
||
| } | ||
| } | ||
| }() | ||
|
|
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| return nil | ||
| } | ||
|
|
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| // checkTags checks if the tags of a workload were properly set | ||
| func (t *LinuxResolver) checkTags(workload *cgroupModel.CacheEntry) { | ||
| // check if the workload tags were found | ||
| if workload.NeedsTagsResolution() { | ||
| // this is a container, try to resolve its tags now | ||
| if err := t.fetchTags(workload); err != nil || workload.NeedsTagsResolution() { | ||
| // push to the workloadsWithoutTags chan so that its tags can be resolved later | ||
| select { | ||
| case t.workloadsWithoutTags <- workload: | ||
| default: | ||
| } | ||
| return | ||
| } | ||
| } | ||
|
|
||
| // notify listeners | ||
| t.listenersLock.Lock() | ||
| defer t.listenersLock.Unlock() | ||
| for _, l := range t.listeners[WorkloadSelectorResolved] { | ||
| l(workload) | ||
| } | ||
| } | ||
|
|
||
| // fetchTags fetches tags for the provided workload | ||
| func (t *LinuxResolver) fetchTags(container *cgroupModel.CacheEntry) error { | ||
| newTags, err := t.ResolveWithErr(string(container.ContainerID)) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to resolve %s: %w", container.ContainerID, err) | ||
| } | ||
| container.SetTags(newTags) | ||
| return nil | ||
| } | ||
|
|
||
| // NewResolver returns a new tags resolver | ||
| func NewResolver(config *config.Config, telemetry telemetry.Component, cgroupsResolver *cgroup.Resolver) Resolver { | ||
| defaultResolver := NewDefaultResolver(config, telemetry) | ||
| workloadsWithoutTags := make(chan *cgroupModel.CacheEntry, 100) | ||
| resolver := &LinuxResolver{ | ||
| DefaultResolver: defaultResolver, | ||
| workloadsWithoutTags: workloadsWithoutTags, | ||
| cgroupResolver: cgroupsResolver, | ||
| } | ||
| if config.RemoteTaggerEnabled { | ||
| options, err := remote.NodeAgentOptionsForSecurityResolvers(pkgconfigsetup.Datadog()) | ||
| if err != nil { | ||
| log.Errorf("unable to configure the remote tagger: %s", err) | ||
| } else { | ||
| resolver.tagger = remote.NewTagger(options, pkgconfigsetup.Datadog(), taggerTelemetry.NewStore(telemetry), types.NewMatchAllFilter()) | ||
| } | ||
| } | ||
| return resolver | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| // Unless explicitly stated otherwise all files in this repository are licensed | ||
| // under the Apache License Version 2.0. | ||
| // This product includes software developed at Datadog (https://www.datadoghq.com/). | ||
| // Copyright 2016-present Datadog, Inc. | ||
|
|
||
| //go:build !linux | ||
|
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| // Package tags holds tags related files | ||
| package tags | ||
|
|
||
| import ( | ||
| "github.com/DataDog/datadog-agent/comp/core/telemetry" | ||
| "github.com/DataDog/datadog-agent/pkg/security/probe/config" | ||
| ) | ||
|
|
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| // Listener is used to propagate tags events | ||
| type Listener func(workload interface{}) | ||
|
|
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| // NewResolver returns a new tags resolver | ||
| func NewResolver(config *config.Config, telemetry telemetry.Component) Resolver { | ||
| return NewDefaultResolver(config, telemetry) | ||
| } |