mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-18 20:30:23 +00:00
73 lines
2.2 KiB
Go
73 lines
2.2 KiB
Go
|
// Copyright The OpenTelemetry 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.
|
||
|
|
|
||
|
|
package resource // import "go.opentelemetry.io/otel/sdk/resource"
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"fmt"
|
||
|
|
"os"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"go.opentelemetry.io/otel/attribute"
|
||
|
|
)
|
||
|
|
|
||
|
|
// envVar is the environment variable name OpenTelemetry Resource information can be assigned to.
|
||
|
|
const envVar = "OTEL_RESOURCE_ATTRIBUTES"
|
||
|
|
|
||
|
|
var (
|
||
|
|
// errMissingValue is returned when a resource value is missing.
|
||
|
|
errMissingValue = fmt.Errorf("%w: missing value", ErrPartialResource)
|
||
|
|
)
|
||
|
|
|
||
|
|
// FromEnv is a Detector that implements the Detector and collects
|
||
|
|
// resources from environment. This Detector is included as a
|
||
|
|
// builtin. If these resource attributes are not wanted, use the
|
||
|
|
// WithFromEnv(nil) or WithoutBuiltin() options to explicitly disable
|
||
|
|
// them.
|
||
|
|
type FromEnv struct{}
|
||
|
|
|
||
|
|
// compile time assertion that FromEnv implements Detector interface
|
||
|
|
var _ Detector = FromEnv{}
|
||
|
|
|
||
|
|
// Detect collects resources from environment
|
||
|
|
func (FromEnv) Detect(context.Context) (*Resource, error) {
|
||
|
|
attrs := strings.TrimSpace(os.Getenv(envVar))
|
||
|
|
|
||
|
|
if attrs == "" {
|
||
|
|
return Empty(), nil
|
||
|
|
}
|
||
|
|
return constructOTResources(attrs)
|
||
|
|
}
|
||
|
|
|
||
|
|
func constructOTResources(s string) (*Resource, error) {
|
||
|
|
pairs := strings.Split(s, ",")
|
||
|
|
attrs := []attribute.KeyValue{}
|
||
|
|
var invalid []string
|
||
|
|
for _, p := range pairs {
|
||
|
|
field := strings.SplitN(p, "=", 2)
|
||
|
|
if len(field) != 2 {
|
||
|
|
invalid = append(invalid, p)
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
k, v := strings.TrimSpace(field[0]), strings.TrimSpace(field[1])
|
||
|
|
attrs = append(attrs, attribute.String(k, v))
|
||
|
|
}
|
||
|
|
var err error
|
||
|
|
if len(invalid) > 0 {
|
||
|
|
err = fmt.Errorf("%w: %v", errMissingValue, invalid)
|
||
|
|
}
|
||
|
|
return NewWithAttributes(attrs...), err
|
||
|
|
}
|