rebase: update kubernetes and libraries to v1.22.0 version

Kubernetes v1.22 version has been released and this update
ceph csi dependencies to use the same version.

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
This commit is contained in:
Humble Chirammal
2021-08-09 12:49:24 +05:30
committed by mergify[bot]
parent e077c1fdf5
commit aa698bc3e1
759 changed files with 61864 additions and 6514 deletions

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Apache License
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// 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 trace
import (
"time"
"go.opentelemetry.io/otel/attribute"
)
// TracerConfig is a group of options for a Tracer.
type TracerConfig struct {
// InstrumentationVersion is the version of the library providing
// instrumentation.
InstrumentationVersion string
}
// NewTracerConfig applies all the options to a returned TracerConfig.
func NewTracerConfig(options ...TracerOption) *TracerConfig {
config := new(TracerConfig)
for _, option := range options {
option.ApplyTracer(config)
}
return config
}
// TracerOption applies an option to a TracerConfig.
type TracerOption interface {
ApplyTracer(*TracerConfig)
// A private method to prevent users implementing the
// interface and so future additions to it will not
// violate compatibility.
private()
}
// SpanConfig is a group of options for a Span.
type SpanConfig struct {
// Attributes describe the associated qualities of a Span.
Attributes []attribute.KeyValue
// Timestamp is a time in a Span life-cycle.
Timestamp time.Time
// Links are the associations a Span has with other Spans.
Links []Link
// NewRoot identifies a Span as the root Span for a new trace. This is
// commonly used when an existing trace crosses trust boundaries and the
// remote parent span context should be ignored for security.
NewRoot bool
// SpanKind is the role a Span has in a trace.
SpanKind SpanKind
}
// NewSpanConfig applies all the options to a returned SpanConfig.
// No validation is performed on the returned SpanConfig (e.g. no uniqueness
// checking or bounding of data), it is left to the SDK to perform this
// action.
func NewSpanConfig(options ...SpanOption) *SpanConfig {
c := new(SpanConfig)
for _, option := range options {
option.ApplySpan(c)
}
return c
}
// SpanOption applies an option to a SpanConfig.
type SpanOption interface {
ApplySpan(*SpanConfig)
// A private method to prevent users implementing the
// interface and so future additions to it will not
// violate compatibility.
private()
}
// NewEventConfig applies all the EventOptions to a returned SpanConfig. If no
// timestamp option is passed, the returned SpanConfig will have a Timestamp
// set to the call time, otherwise no validation is performed on the returned
// SpanConfig.
func NewEventConfig(options ...EventOption) *SpanConfig {
c := new(SpanConfig)
for _, option := range options {
option.ApplyEvent(c)
}
if c.Timestamp.IsZero() {
c.Timestamp = time.Now()
}
return c
}
// EventOption applies span event options to a SpanConfig.
type EventOption interface {
ApplyEvent(*SpanConfig)
// A private method to prevent users implementing the
// interface and so future additions to it will not
// violate compatibility.
private()
}
// LifeCycleOption applies span life-cycle options to a SpanConfig. These
// options set values releated to events in a spans life-cycle like starting,
// ending, experiencing an error and other user defined notable events.
type LifeCycleOption interface {
SpanOption
EventOption
}
type attributeSpanOption []attribute.KeyValue
func (o attributeSpanOption) ApplySpan(c *SpanConfig) { o.apply(c) }
func (o attributeSpanOption) ApplyEvent(c *SpanConfig) { o.apply(c) }
func (attributeSpanOption) private() {}
func (o attributeSpanOption) apply(c *SpanConfig) {
c.Attributes = append(c.Attributes, []attribute.KeyValue(o)...)
}
// WithAttributes adds the attributes related to a span life-cycle event.
// These attributes are used to describe the work a Span represents when this
// option is provided to a Span's start or end events. Otherwise, these
// attributes provide additional information about the event being recorded
// (e.g. error, state change, processing progress, system event).
//
// If multiple of these options are passed the attributes of each successive
// option will extend the attributes instead of overwriting. There is no
// guarantee of uniqueness in the resulting attributes.
func WithAttributes(attributes ...attribute.KeyValue) LifeCycleOption {
return attributeSpanOption(attributes)
}
type timestampSpanOption time.Time
func (o timestampSpanOption) ApplySpan(c *SpanConfig) { o.apply(c) }
func (o timestampSpanOption) ApplyEvent(c *SpanConfig) { o.apply(c) }
func (timestampSpanOption) private() {}
func (o timestampSpanOption) apply(c *SpanConfig) { c.Timestamp = time.Time(o) }
// WithTimestamp sets the time of a Span life-cycle moment (e.g. started,
// stopped, errored).
func WithTimestamp(t time.Time) LifeCycleOption {
return timestampSpanOption(t)
}
type linksSpanOption []Link
func (o linksSpanOption) ApplySpan(c *SpanConfig) { c.Links = append(c.Links, []Link(o)...) }
func (linksSpanOption) private() {}
// WithLinks adds links to a Span. The links are added to the existing Span
// links, i.e. this does not overwrite.
func WithLinks(links ...Link) SpanOption {
return linksSpanOption(links)
}
type newRootSpanOption bool
func (o newRootSpanOption) ApplySpan(c *SpanConfig) { c.NewRoot = bool(o) }
func (newRootSpanOption) private() {}
// WithNewRoot specifies that the Span should be treated as a root Span. Any
// existing parent span context will be ignored when defining the Span's trace
// identifiers.
func WithNewRoot() SpanOption {
return newRootSpanOption(true)
}
type spanKindSpanOption SpanKind
func (o spanKindSpanOption) ApplySpan(c *SpanConfig) { c.SpanKind = SpanKind(o) }
func (o spanKindSpanOption) private() {}
// WithSpanKind sets the SpanKind of a Span.
func WithSpanKind(kind SpanKind) SpanOption {
return spanKindSpanOption(kind)
}
// InstrumentationOption is an interface for applying instrumentation specific
// options.
type InstrumentationOption interface {
TracerOption
}
// WithInstrumentationVersion sets the instrumentation version.
func WithInstrumentationVersion(version string) InstrumentationOption {
return instrumentationVersionOption(version)
}
type instrumentationVersionOption string
func (i instrumentationVersionOption) ApplyTracer(config *TracerConfig) {
config.InstrumentationVersion = string(i)
}
func (instrumentationVersionOption) private() {}

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// 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 trace // import "go.opentelemetry.io/otel/trace"
import "context"
type traceContextKeyType int
const currentSpanKey traceContextKeyType = iota
// ContextWithSpan returns a copy of parent with span set as the current Span.
func ContextWithSpan(parent context.Context, span Span) context.Context {
return context.WithValue(parent, currentSpanKey, span)
}
// ContextWithSpanContext returns a copy of parent with sc as the current
// Span. The Span implementation that wraps sc is non-recording and performs
// no operations other than to return sc as the SpanContext from the
// SpanContext method.
func ContextWithSpanContext(parent context.Context, sc SpanContext) context.Context {
return ContextWithSpan(parent, nonRecordingSpan{sc: sc})
}
// ContextWithRemoteSpanContext returns a copy of parent with rsc set explicly
// as a remote SpanContext and as the current Span. The Span implementation
// that wraps rsc is non-recording and performs no operations other than to
// return rsc as the SpanContext from the SpanContext method.
func ContextWithRemoteSpanContext(parent context.Context, rsc SpanContext) context.Context {
return ContextWithSpanContext(parent, rsc.WithRemote(true))
}
// SpanFromContext returns the current Span from ctx.
//
// If no Span is currently set in ctx an implementation of a Span that
// performs no operations is returned.
func SpanFromContext(ctx context.Context) Span {
if ctx == nil {
return noopSpan{}
}
if span, ok := ctx.Value(currentSpanKey).(Span); ok {
return span
}
return noopSpan{}
}
// SpanContextFromContext returns the current Span's SpanContext.
func SpanContextFromContext(ctx context.Context) SpanContext {
return SpanFromContext(ctx).SpanContext()
}

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// 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 trace provides an implementation of the tracing part of the
OpenTelemetry API.
This package is currently in a pre-GA phase. Backwards incompatible changes
may be introduced in subsequent minor version releases as we work to track the
evolving OpenTelemetry specification and user feedback.
To participate in distributed traces a Span needs to be created for the
operation being performed as part of a traced workflow. It its simplest form:
var tracer trace.Tracer
func init() {
tracer = otel.Tracer("instrumentation/package/name")
}
func operation(ctx context.Context) {
var span trace.Span
ctx, span = tracer.Start(ctx, "operation")
defer span.End()
// ...
}
A Tracer is unique to the instrumentation and is used to create Spans.
Instrumentation should be designed to accept a TracerProvider from which it
can create its own unique Tracer. Alternatively, the registered global
TracerProvider from the go.opentelemetry.io/otel package can be used as
a default.
const (
name = "instrumentation/package/name"
version = "0.1.0"
)
type Instrumentation struct {
tracer trace.Tracer
}
func NewInstrumentation(tp trace.TracerProvider) *Instrumentation {
if tp == nil {
tp = otel.TracerProvider()
}
return &Instrumentation{
tracer: tp.Tracer(name, trace.WithInstrumentationVersion(version)),
}
}
func operation(ctx context.Context, inst *Instrumentation) {
var span trace.Span
ctx, span = inst.tracer.Start(ctx, "operation")
defer span.End()
// ...
}
*/
package trace // import "go.opentelemetry.io/otel/trace"

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vendor/go.opentelemetry.io/otel/trace/go.mod generated vendored Normal file
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module go.opentelemetry.io/otel/trace
go 1.14
replace go.opentelemetry.io/otel => ../
replace go.opentelemetry.io/otel/bridge/opencensus => ../bridge/opencensus
replace go.opentelemetry.io/otel/bridge/opentracing => ../bridge/opentracing
replace go.opentelemetry.io/otel/example/jaeger => ../example/jaeger
replace go.opentelemetry.io/otel/example/namedtracer => ../example/namedtracer
replace go.opentelemetry.io/otel/example/opencensus => ../example/opencensus
replace go.opentelemetry.io/otel/example/otel-collector => ../example/otel-collector
replace go.opentelemetry.io/otel/example/prom-collector => ../example/prom-collector
replace go.opentelemetry.io/otel/example/prometheus => ../example/prometheus
replace go.opentelemetry.io/otel/example/zipkin => ../example/zipkin
replace go.opentelemetry.io/otel/exporters/metric/prometheus => ../exporters/metric/prometheus
replace go.opentelemetry.io/otel/exporters/otlp => ../exporters/otlp
replace go.opentelemetry.io/otel/exporters/stdout => ../exporters/stdout
replace go.opentelemetry.io/otel/exporters/trace/jaeger => ../exporters/trace/jaeger
replace go.opentelemetry.io/otel/exporters/trace/zipkin => ../exporters/trace/zipkin
replace go.opentelemetry.io/otel/internal/tools => ../internal/tools
replace go.opentelemetry.io/otel/metric => ../metric
replace go.opentelemetry.io/otel/oteltest => ../oteltest
replace go.opentelemetry.io/otel/sdk => ../sdk
replace go.opentelemetry.io/otel/sdk/export/metric => ../sdk/export/metric
replace go.opentelemetry.io/otel/sdk/metric => ../sdk/metric
replace go.opentelemetry.io/otel/trace => ./
require (
github.com/google/go-cmp v0.5.5
github.com/stretchr/testify v1.7.0
go.opentelemetry.io/otel v0.20.0
)

15
vendor/go.opentelemetry.io/otel/trace/go.sum generated vendored Normal file
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github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

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// 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 trace // import "go.opentelemetry.io/otel/trace"
// nonRecordingSpan is a minimal implementation of a Span that wraps a
// SpanContext. It performs no operations other than to return the wrapped
// SpanContext.
type nonRecordingSpan struct {
noopSpan
sc SpanContext
}
// SpanContext returns the wrapped SpanContext.
func (s nonRecordingSpan) SpanContext() SpanContext { return s.sc }

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// 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 trace // import "go.opentelemetry.io/otel/trace"
import (
"context"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
)
// NewNoopTracerProvider returns an implementation of TracerProvider that
// performs no operations. The Tracer and Spans created from the returned
// TracerProvider also perform no operations.
func NewNoopTracerProvider() TracerProvider {
return noopTracerProvider{}
}
type noopTracerProvider struct{}
var _ TracerProvider = noopTracerProvider{}
// Tracer returns noop implementation of Tracer.
func (p noopTracerProvider) Tracer(string, ...TracerOption) Tracer {
return noopTracer{}
}
// noopTracer is an implementation of Tracer that preforms no operations.
type noopTracer struct{}
var _ Tracer = noopTracer{}
// Start starts a noop span.
func (t noopTracer) Start(ctx context.Context, name string, _ ...SpanOption) (context.Context, Span) {
span := noopSpan{}
return ContextWithSpan(ctx, span), span
}
// noopSpan is an implementation of Span that preforms no operations.
type noopSpan struct{}
var _ Span = noopSpan{}
// SpanContext returns an empty span context.
func (noopSpan) SpanContext() SpanContext { return SpanContext{} }
// IsRecording always returns false.
func (noopSpan) IsRecording() bool { return false }
// SetStatus does nothing.
func (noopSpan) SetStatus(codes.Code, string) {}
// SetError does nothing.
func (noopSpan) SetError(bool) {}
// SetAttributes does nothing.
func (noopSpan) SetAttributes(...attribute.KeyValue) {}
// End does nothing.
func (noopSpan) End(...SpanOption) {}
// RecordError does nothing.
func (noopSpan) RecordError(error, ...EventOption) {}
// Tracer returns the Tracer that created this Span.
func (noopSpan) Tracer() Tracer { return noopTracer{} }
// AddEvent does nothing.
func (noopSpan) AddEvent(string, ...EventOption) {}
// SetName does nothing.
func (noopSpan) SetName(string) {}

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// 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 trace // import "go.opentelemetry.io/otel/trace"
import (
"bytes"
"context"
"encoding/hex"
"encoding/json"
"regexp"
"strings"
"time"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
)
const (
// FlagsSampled is a bitmask with the sampled bit set. A SpanContext
// with the sampling bit set means the span is sampled.
FlagsSampled = TraceFlags(0x01)
errInvalidHexID errorConst = "trace-id and span-id can only contain [0-9a-f] characters, all lowercase"
errInvalidTraceIDLength errorConst = "hex encoded trace-id must have length equals to 32"
errNilTraceID errorConst = "trace-id can't be all zero"
errInvalidSpanIDLength errorConst = "hex encoded span-id must have length equals to 16"
errNilSpanID errorConst = "span-id can't be all zero"
// based on the W3C Trace Context specification, see https://www.w3.org/TR/trace-context-1/#tracestate-header
traceStateKeyFormat = `[a-z][_0-9a-z\-\*\/]{0,255}`
traceStateKeyFormatWithMultiTenantVendor = `[a-z0-9][_0-9a-z\-\*\/]{0,240}@[a-z][_0-9a-z\-\*\/]{0,13}`
traceStateValueFormat = `[\x20-\x2b\x2d-\x3c\x3e-\x7e]{0,255}[\x21-\x2b\x2d-\x3c\x3e-\x7e]`
traceStateMaxListMembers = 32
errInvalidTraceStateKeyValue errorConst = "provided key or value is not valid according to the" +
" W3C Trace Context specification"
errInvalidTraceStateMembersNumber errorConst = "trace state would exceed the maximum limit of members (32)"
errInvalidTraceStateDuplicate errorConst = "trace state key/value pairs with duplicate keys provided"
)
type errorConst string
func (e errorConst) Error() string {
return string(e)
}
// TraceID is a unique identity of a trace.
// nolint:golint
type TraceID [16]byte
var nilTraceID TraceID
var _ json.Marshaler = nilTraceID
// IsValid checks whether the trace TraceID is valid. A valid trace ID does
// not consist of zeros only.
func (t TraceID) IsValid() bool {
return !bytes.Equal(t[:], nilTraceID[:])
}
// MarshalJSON implements a custom marshal function to encode TraceID
// as a hex string.
func (t TraceID) MarshalJSON() ([]byte, error) {
return json.Marshal(t.String())
}
// String returns the hex string representation form of a TraceID
func (t TraceID) String() string {
return hex.EncodeToString(t[:])
}
// SpanID is a unique identity of a span in a trace.
type SpanID [8]byte
var nilSpanID SpanID
var _ json.Marshaler = nilSpanID
// IsValid checks whether the SpanID is valid. A valid SpanID does not consist
// of zeros only.
func (s SpanID) IsValid() bool {
return !bytes.Equal(s[:], nilSpanID[:])
}
// MarshalJSON implements a custom marshal function to encode SpanID
// as a hex string.
func (s SpanID) MarshalJSON() ([]byte, error) {
return json.Marshal(s.String())
}
// String returns the hex string representation form of a SpanID
func (s SpanID) String() string {
return hex.EncodeToString(s[:])
}
// TraceIDFromHex returns a TraceID from a hex string if it is compliant with
// the W3C trace-context specification. See more at
// https://www.w3.org/TR/trace-context/#trace-id
// nolint:golint
func TraceIDFromHex(h string) (TraceID, error) {
t := TraceID{}
if len(h) != 32 {
return t, errInvalidTraceIDLength
}
if err := decodeHex(h, t[:]); err != nil {
return t, err
}
if !t.IsValid() {
return t, errNilTraceID
}
return t, nil
}
// SpanIDFromHex returns a SpanID from a hex string if it is compliant
// with the w3c trace-context specification.
// See more at https://www.w3.org/TR/trace-context/#parent-id
func SpanIDFromHex(h string) (SpanID, error) {
s := SpanID{}
if len(h) != 16 {
return s, errInvalidSpanIDLength
}
if err := decodeHex(h, s[:]); err != nil {
return s, err
}
if !s.IsValid() {
return s, errNilSpanID
}
return s, nil
}
func decodeHex(h string, b []byte) error {
for _, r := range h {
switch {
case 'a' <= r && r <= 'f':
continue
case '0' <= r && r <= '9':
continue
default:
return errInvalidHexID
}
}
decoded, err := hex.DecodeString(h)
if err != nil {
return err
}
copy(b, decoded)
return nil
}
// TraceState provides additional vendor-specific trace identification information
// across different distributed tracing systems. It represents an immutable list consisting
// of key/value pairs. There can be a maximum of 32 entries in the list.
//
// Key and value of each list member must be valid according to the W3C Trace Context specification
// (see https://www.w3.org/TR/trace-context-1/#key and https://www.w3.org/TR/trace-context-1/#value
// respectively).
//
// Trace state must be valid according to the W3C Trace Context specification at all times. All
// mutating operations validate their input and, in case of valid parameters, return a new TraceState.
type TraceState struct { //nolint:golint
// TODO @matej-g: Consider implementing this as attribute.Set, see
// comment https://github.com/open-telemetry/opentelemetry-go/pull/1340#discussion_r540599226
kvs []attribute.KeyValue
}
var _ json.Marshaler = TraceState{}
var _ json.Marshaler = SpanContext{}
var keyFormatRegExp = regexp.MustCompile(
`^((` + traceStateKeyFormat + `)|(` + traceStateKeyFormatWithMultiTenantVendor + `))$`,
)
var valueFormatRegExp = regexp.MustCompile(`^(` + traceStateValueFormat + `)$`)
// MarshalJSON implements a custom marshal function to encode trace state.
func (ts TraceState) MarshalJSON() ([]byte, error) {
return json.Marshal(ts.kvs)
}
// String returns trace state as a string valid according to the
// W3C Trace Context specification.
func (ts TraceState) String() string {
var sb strings.Builder
for i, kv := range ts.kvs {
sb.WriteString((string)(kv.Key))
sb.WriteByte('=')
sb.WriteString(kv.Value.Emit())
if i != len(ts.kvs)-1 {
sb.WriteByte(',')
}
}
return sb.String()
}
// Get returns a value for given key from the trace state.
// If no key is found or provided key is invalid, returns an empty value.
func (ts TraceState) Get(key attribute.Key) attribute.Value {
if !isTraceStateKeyValid(key) {
return attribute.Value{}
}
for _, kv := range ts.kvs {
if kv.Key == key {
return kv.Value
}
}
return attribute.Value{}
}
// Insert adds a new key/value, if one doesn't exists; otherwise updates the existing entry.
// The new or updated entry is always inserted at the beginning of the TraceState, i.e.
// on the left side, as per the W3C Trace Context specification requirement.
func (ts TraceState) Insert(entry attribute.KeyValue) (TraceState, error) {
if !isTraceStateKeyValueValid(entry) {
return ts, errInvalidTraceStateKeyValue
}
ckvs := ts.copyKVsAndDeleteEntry(entry.Key)
if len(ckvs)+1 > traceStateMaxListMembers {
return ts, errInvalidTraceStateMembersNumber
}
ckvs = append(ckvs, attribute.KeyValue{})
copy(ckvs[1:], ckvs)
ckvs[0] = entry
return TraceState{ckvs}, nil
}
// Delete removes specified entry from the trace state.
func (ts TraceState) Delete(key attribute.Key) (TraceState, error) {
if !isTraceStateKeyValid(key) {
return ts, errInvalidTraceStateKeyValue
}
return TraceState{ts.copyKVsAndDeleteEntry(key)}, nil
}
// IsEmpty returns true if the TraceState does not contain any entries
func (ts TraceState) IsEmpty() bool {
return len(ts.kvs) == 0
}
func (ts TraceState) copyKVsAndDeleteEntry(key attribute.Key) []attribute.KeyValue {
ckvs := make([]attribute.KeyValue, len(ts.kvs))
copy(ckvs, ts.kvs)
for i, kv := range ts.kvs {
if kv.Key == key {
ckvs = append(ckvs[:i], ckvs[i+1:]...)
break
}
}
return ckvs
}
// TraceStateFromKeyValues is a convenience method to create a new TraceState from
// provided key/value pairs.
func TraceStateFromKeyValues(kvs ...attribute.KeyValue) (TraceState, error) { //nolint:golint
if len(kvs) == 0 {
return TraceState{}, nil
}
if len(kvs) > traceStateMaxListMembers {
return TraceState{}, errInvalidTraceStateMembersNumber
}
km := make(map[attribute.Key]bool)
for _, kv := range kvs {
if !isTraceStateKeyValueValid(kv) {
return TraceState{}, errInvalidTraceStateKeyValue
}
_, ok := km[kv.Key]
if ok {
return TraceState{}, errInvalidTraceStateDuplicate
}
km[kv.Key] = true
}
ckvs := make([]attribute.KeyValue, len(kvs))
copy(ckvs, kvs)
return TraceState{ckvs}, nil
}
func isTraceStateKeyValid(key attribute.Key) bool {
return keyFormatRegExp.MatchString(string(key))
}
func isTraceStateKeyValueValid(kv attribute.KeyValue) bool {
return isTraceStateKeyValid(kv.Key) &&
valueFormatRegExp.MatchString(kv.Value.Emit())
}
// TraceFlags contains flags that can be set on a SpanContext
type TraceFlags byte //nolint:golint
// IsSampled returns if the sampling bit is set in the TraceFlags.
func (tf TraceFlags) IsSampled() bool {
return tf&FlagsSampled == FlagsSampled
}
// WithSampled sets the sampling bit in a new copy of the TraceFlags.
func (tf TraceFlags) WithSampled(sampled bool) TraceFlags {
if sampled {
return tf | FlagsSampled
}
return tf &^ FlagsSampled
}
// MarshalJSON implements a custom marshal function to encode TraceFlags
// as a hex string.
func (tf TraceFlags) MarshalJSON() ([]byte, error) {
return json.Marshal(tf.String())
}
// String returns the hex string representation form of TraceFlags
func (tf TraceFlags) String() string {
return hex.EncodeToString([]byte{byte(tf)}[:])
}
// SpanContextConfig contains mutable fields usable for constructing
// an immutable SpanContext.
type SpanContextConfig struct {
TraceID TraceID
SpanID SpanID
TraceFlags TraceFlags
TraceState TraceState
Remote bool
}
// NewSpanContext constructs a SpanContext using values from the provided
// SpanContextConfig.
func NewSpanContext(config SpanContextConfig) SpanContext {
return SpanContext{
traceID: config.TraceID,
spanID: config.SpanID,
traceFlags: config.TraceFlags,
traceState: config.TraceState,
remote: config.Remote,
}
}
// SpanContext contains identifying trace information about a Span.
type SpanContext struct {
traceID TraceID
spanID SpanID
traceFlags TraceFlags
traceState TraceState
remote bool
}
// IsValid returns if the SpanContext is valid. A valid span context has a
// valid TraceID and SpanID.
func (sc SpanContext) IsValid() bool {
return sc.HasTraceID() && sc.HasSpanID()
}
// IsRemote indicates whether the SpanContext represents a remotely-created Span.
func (sc SpanContext) IsRemote() bool {
return sc.remote
}
// WithRemote returns a copy of sc with the Remote property set to remote.
func (sc SpanContext) WithRemote(remote bool) SpanContext {
return SpanContext{
traceID: sc.traceID,
spanID: sc.spanID,
traceFlags: sc.traceFlags,
traceState: sc.traceState,
remote: remote,
}
}
// TraceID returns the TraceID from the SpanContext.
func (sc SpanContext) TraceID() TraceID {
return sc.traceID
}
// HasTraceID checks if the SpanContext has a valid TraceID.
func (sc SpanContext) HasTraceID() bool {
return sc.traceID.IsValid()
}
// WithTraceID returns a new SpanContext with the TraceID replaced.
func (sc SpanContext) WithTraceID(traceID TraceID) SpanContext {
return SpanContext{
traceID: traceID,
spanID: sc.spanID,
traceFlags: sc.traceFlags,
traceState: sc.traceState,
remote: sc.remote,
}
}
// SpanID returns the SpanID from the SpanContext.
func (sc SpanContext) SpanID() SpanID {
return sc.spanID
}
// HasSpanID checks if the SpanContext has a valid SpanID.
func (sc SpanContext) HasSpanID() bool {
return sc.spanID.IsValid()
}
// WithSpanID returns a new SpanContext with the SpanID replaced.
func (sc SpanContext) WithSpanID(spanID SpanID) SpanContext {
return SpanContext{
traceID: sc.traceID,
spanID: spanID,
traceFlags: sc.traceFlags,
traceState: sc.traceState,
remote: sc.remote,
}
}
// TraceFlags returns the flags from the SpanContext.
func (sc SpanContext) TraceFlags() TraceFlags {
return sc.traceFlags
}
// IsSampled returns if the sampling bit is set in the SpanContext's TraceFlags.
func (sc SpanContext) IsSampled() bool {
return sc.traceFlags.IsSampled()
}
// WithTraceFlags returns a new SpanContext with the TraceFlags replaced.
func (sc SpanContext) WithTraceFlags(flags TraceFlags) SpanContext {
return SpanContext{
traceID: sc.traceID,
spanID: sc.spanID,
traceFlags: flags,
traceState: sc.traceState,
remote: sc.remote,
}
}
// TraceState returns the TraceState from the SpanContext.
func (sc SpanContext) TraceState() TraceState {
return sc.traceState
}
// WithTraceState returns a new SpanContext with the TraceState replaced.
func (sc SpanContext) WithTraceState(state TraceState) SpanContext {
return SpanContext{
traceID: sc.traceID,
spanID: sc.spanID,
traceFlags: sc.traceFlags,
traceState: state,
remote: sc.remote,
}
}
// Equal is a predicate that determines whether two SpanContext values are equal.
func (sc SpanContext) Equal(other SpanContext) bool {
return sc.traceID == other.traceID &&
sc.spanID == other.spanID &&
sc.traceFlags == other.traceFlags &&
sc.traceState.String() == other.traceState.String() &&
sc.remote == other.remote
}
// MarshalJSON implements a custom marshal function to encode a SpanContext.
func (sc SpanContext) MarshalJSON() ([]byte, error) {
return json.Marshal(SpanContextConfig{
TraceID: sc.traceID,
SpanID: sc.spanID,
TraceFlags: sc.traceFlags,
TraceState: sc.traceState,
Remote: sc.remote,
})
}
// Span is the individual component of a trace. It represents a single named
// and timed operation of a workflow that is traced. A Tracer is used to
// create a Span and it is then up to the operation the Span represents to
// properly end the Span when the operation itself ends.
type Span interface {
// Tracer returns the Tracer that created the Span. Tracer MUST NOT be
// nil.
Tracer() Tracer
// End completes the Span. The Span is considered complete and ready to be
// delivered through the rest of the telemetry pipeline after this method
// is called. Therefore, updates to the Span are not allowed after this
// method has been called.
End(options ...SpanOption)
// AddEvent adds an event with the provided name and options.
AddEvent(name string, options ...EventOption)
// IsRecording returns the recording state of the Span. It will return
// true if the Span is active and events can be recorded.
IsRecording() bool
// RecordError will record err as an exception span event for this span. An
// additional call toSetStatus is required if the Status of the Span should
// be set to Error, this method does not change the Span status. If this
// span is not being recorded or err is nil than this method does nothing.
RecordError(err error, options ...EventOption)
// SpanContext returns the SpanContext of the Span. The returned
// SpanContext is usable even after the End has been called for the Span.
SpanContext() SpanContext
// SetStatus sets the status of the Span in the form of a code and a
// message. SetStatus overrides the value of previous calls to SetStatus
// on the Span.
SetStatus(code codes.Code, msg string)
// SetName sets the Span name.
SetName(name string)
// SetAttributes sets kv as attributes of the Span. If a key from kv
// already exists for an attribute of the Span it will be overwritten with
// the value contained in kv.
SetAttributes(kv ...attribute.KeyValue)
}
// Event is a thing that happened during a Span's lifetime.
type Event struct {
// Name is the name of this event
Name string
// Attributes describe the aspects of the event.
Attributes []attribute.KeyValue
// DroppedAttributeCount is the number of attributes that were not
// recorded due to configured limits being reached.
DroppedAttributeCount int
// Time at which this event was recorded.
Time time.Time
}
// Link is the relationship between two Spans. The relationship can be within
// the same Trace or across different Traces.
//
// For example, a Link is used in the following situations:
//
// 1. Batch Processing: A batch of operations may contain operations
// associated with one or more traces/spans. Since there can only be one
// parent SpanContext, a Link is used to keep reference to the
// SpanContext of all operations in the batch.
// 2. Public Endpoint: A SpanContext for an in incoming client request on a
// public endpoint should be considered untrusted. In such a case, a new
// trace with its own identity and sampling decision needs to be created,
// but this new trace needs to be related to the original trace in some
// form. A Link is used to keep reference to the original SpanContext and
// track the relationship.
type Link struct {
// SpanContext of the linked Span.
SpanContext
// Attributes describe the aspects of the link.
Attributes []attribute.KeyValue
// DroppedAttributeCount is the number of attributes that were not
// recorded due to configured limits being reached.
DroppedAttributeCount int
}
// SpanKind is the role a Span plays in a Trace.
type SpanKind int
// As a convenience, these match the proto definition, see
// https://github.com/open-telemetry/opentelemetry-proto/blob/30d237e1ff3ab7aa50e0922b5bebdd93505090af/opentelemetry/proto/trace/v1/trace.proto#L101-L129
//
// The unspecified value is not a valid `SpanKind`. Use `ValidateSpanKind()`
// to coerce a span kind to a valid value.
const (
// SpanKindUnspecified is an unspecified SpanKind and is not a valid
// SpanKind. SpanKindUnspecified should be replaced with SpanKindInternal
// if it is received.
SpanKindUnspecified SpanKind = 0
// SpanKindInternal is a SpanKind for a Span that represents an internal
// operation within an application.
SpanKindInternal SpanKind = 1
// SpanKindServer is a SpanKind for a Span that represents the operation
// of handling a request from a client.
SpanKindServer SpanKind = 2
// SpanKindClient is a SpanKind for a Span that represents the operation
// of client making a request to a server.
SpanKindClient SpanKind = 3
// SpanKindProducer is a SpanKind for a Span that represents the operation
// of a producer sending a message to a message broker. Unlike
// SpanKindClient and SpanKindServer, there is often no direct
// relationship between this kind of Span and a SpanKindConsumer kind. A
// SpanKindProducer Span will end once the message is accepted by the
// message broker which might not overlap with the processing of that
// message.
SpanKindProducer SpanKind = 4
// SpanKindConsumer is a SpanKind for a Span that represents the operation
// of a consumer receiving a message from a message broker. Like
// SpanKindProducer Spans, there is often no direct relationship between
// this Span and the Span that produced the message.
SpanKindConsumer SpanKind = 5
)
// ValidateSpanKind returns a valid span kind value. This will coerce
// invalid values into the default value, SpanKindInternal.
func ValidateSpanKind(spanKind SpanKind) SpanKind {
switch spanKind {
case SpanKindInternal,
SpanKindServer,
SpanKindClient,
SpanKindProducer,
SpanKindConsumer:
// valid
return spanKind
default:
return SpanKindInternal
}
}
// String returns the specified name of the SpanKind in lower-case.
func (sk SpanKind) String() string {
switch sk {
case SpanKindInternal:
return "internal"
case SpanKindServer:
return "server"
case SpanKindClient:
return "client"
case SpanKindProducer:
return "producer"
case SpanKindConsumer:
return "consumer"
default:
return "unspecified"
}
}
// Tracer is the creator of Spans.
type Tracer interface {
// Start creates a span.
Start(ctx context.Context, spanName string, opts ...SpanOption) (context.Context, Span)
}
// TracerProvider provides access to instrumentation Tracers.
type TracerProvider interface {
// Tracer creates an implementation of the Tracer interface.
// The instrumentationName must be the name of the library providing
// instrumentation. This name may be the same as the instrumented code
// only if that code provides built-in instrumentation. If the
// instrumentationName is empty, then a implementation defined default
// name will be used instead.
//
// This method must be concurrency safe.
Tracer(instrumentationName string, opts ...TracerOption) Tracer
}