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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| // Copyright (C) 2024 ScyllaDB | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "net/http" | ||
| "sync" | ||
|
|
||
| "github.com/go-chi/render" | ||
| "github.com/pkg/errors" | ||
| "github.com/scylladb/go-log" | ||
| "github.com/scylladb/scylla-manager/v3/pkg/cloudmeta" | ||
| "github.com/scylladb/scylla-manager/v3/swagger/gen/agent/models" | ||
| ) | ||
|
|
||
| func newMetadataHandler(logger log.Logger) http.HandlerFunc { | ||
| var ( | ||
| m sync.Mutex | ||
| loaded bool | ||
| metadata cloudmeta.InstanceMetadata | ||
| ) | ||
|
|
||
| // Caches only successful result of GetInstanceMetadata. | ||
| lazyGetMetadata := func(ctx context.Context) (cloudmeta.InstanceMetadata, error) { | ||
| m.Lock() | ||
| defer m.Unlock() | ||
| if loaded { | ||
| return metadata, nil | ||
| } | ||
|
|
||
| metaSvc, err := cloudmeta.NewCloudMeta(logger) | ||
| if err != nil { | ||
| return cloudmeta.InstanceMetadata{}, errors.Wrap(err, "NewCloudMeta") | ||
| } | ||
|
|
||
| metadata, err = metaSvc.GetInstanceMetadata(ctx) | ||
| if err != nil { | ||
| return cloudmeta.InstanceMetadata{}, err | ||
| } | ||
|
|
||
| loaded = true | ||
| return metadata, nil | ||
| } | ||
|
|
||
| return func(w http.ResponseWriter, r *http.Request) { | ||
| ctx := r.Context() | ||
| instanceMeta, err := lazyGetMetadata(ctx) | ||
| if err != nil { | ||
| // Metadata may not be available for several reasons: | ||
| // 1. running on-premise 2. disabled 3. smth went wrong with metadata server. | ||
| // As we cannot distinguish between these cases, we can only log err. | ||
| logger.Error(ctx, "GetInstanceMetadata", "err", err) | ||
| render.Respond(w, r, models.InstanceMetadata{}) | ||
| return | ||
| } | ||
| render.Respond(w, r, models.InstanceMetadata{ | ||
| CloudProvider: string(instanceMeta.CloudProvider), | ||
| InstanceType: instanceMeta.InstanceType, | ||
| }) | ||
| } | ||
| } |
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