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ecs_metadata.go
62 lines (45 loc) · 1.01 KB
/
ecs_metadata.go
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package log
import (
"os"
"sync"
"time"
"github.com/justtrackio/gosoline/pkg/encoding/json"
"github.com/pkg/errors"
)
const ecsMetadataFileEnv = "ECS_CONTAINER_METADATA_FILE"
type EcsMetadata map[string]interface{}
var (
ecsLck sync.Mutex
ecsMetadata EcsMetadata
)
func ReadEcsMetadata() (EcsMetadata, error) {
ecsLck.Lock()
defer ecsLck.Unlock()
if ecsMetadata != nil {
return ecsMetadata, nil
}
path, ok := os.LookupEnv(ecsMetadataFileEnv)
if len(path) == 0 || !ok {
return nil, nil
}
metadata := make(EcsMetadata)
for {
data, err := os.ReadFile(path)
if err != nil {
return nil, errors.Wrap(err, "can not read ecs metadata file")
}
metadata = make(EcsMetadata)
err = json.Unmarshal(data, &metadata)
if err != nil {
return nil, errors.Wrap(err, "can not unmarshal ecs metadata")
}
if status, ok := metadata["MetadataFileStatus"]; ok {
if status.(string) == "READY" {
break
}
}
time.Sleep(1 * time.Second)
}
ecsMetadata = metadata
return ecsMetadata, nil
}