Add testing support for Go 1.21

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ env:
   # backwards compatibility with the previous two minor releases and we
   # explicitly test our code for these versions so keeping this at prior
   # versions does not add value.
-  DEFAULT_GO_VERSION: "1.20"
+  DEFAULT_GO_VERSION: "1.21"
 jobs:
   lint:
     runs-on: ubuntu-latest
@@ -117,7 +117,7 @@ jobs:
   compatibility-test:
     strategy:
       matrix:
-        go-version: ["1.20", 1.19]
+        go-version: ["1.21", "1.20", 1.19]
         os: [ubuntu-latest, macos-latest, windows-latest]
         # GitHub Actions does not support arm* architectures on default
         # runners. It is possible to acomplish this with a self-hosted runner

.github/workflows/create-dependabot-pr.yml

@@ -10,7 +10,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.21'
 
       - uses: actions/checkout@v3
 

.github/workflows/dependabot.yml

@@ -13,7 +13,7 @@ jobs:
         ref: ${{ github.head_ref }}
     - uses: actions/setup-go@v4
       with:
-        go-version: '^1.20.0'
+        go-version: '^1.21.0'
     - uses: evantorrie/mott-the-tidier@v1-beta
       id: modtidy
       with:

CHANGELOG.md

@@ -15,6 +15,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - The `go.opentelemetry.io/contrib/exporters/autoexport` package to provide configuration of trace exporters with useful defaults and envar support. (#2753, #4100, #4129, #4132, #4134)
 - `WithRouteTag` in `go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp` adds HTTP route attribute to metrics. (#615)
 - Add `WithSpanOptions` option in `go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc`. (#3768)
+- Add testing support for Go 1.21. (#4233)
 
 ### Fixed
 

README.md

@@ -48,14 +48,19 @@ This project is tested on the following systems.
 
 | OS      | Go Version | Architecture |
 | ------- | ---------- | ------------ |
+| Ubuntu  | 1.21       | amd64        |
 | Ubuntu  | 1.20       | amd64        |
 | Ubuntu  | 1.19       | amd64        |
+| Ubuntu  | 1.21       | 386          |
 | Ubuntu  | 1.20       | 386          |
 | Ubuntu  | 1.19       | 386          |
+| MacOS   | 1.21       | amd64        |
 | MacOS   | 1.20       | amd64        |
 | MacOS   | 1.19       | amd64        |
+| Windows | 1.21       | amd64        |
 | Windows | 1.20       | amd64        |
 | Windows | 1.19       | amd64        |
+| Windows | 1.21       | 386          |
 | Windows | 1.20       | 386          |
 | Windows | 1.19       | 386          |
 

samplers/aws/xray/remote_sampler_config.go

@@ -74,6 +74,8 @@ func WithLogger(l logr.Logger) Option {
 	})
 }
 
+var defaultLogger = stdr.NewWithOptions(log.New(os.Stderr, "", log.LstdFlags|log.Lshortfile), stdr.Options{LogCaller: stdr.Error})
+
 func newConfig(opts ...Option) (*config, error) {
 	defaultProxyEndpoint, err := url.Parse("http://127.0.0.1:2000")
 	if err != nil {
@@ -83,7 +85,7 @@ func newConfig(opts ...Option) (*config, error) {
 	cfg := &config{
 		endpoint:                     *defaultProxyEndpoint,
 		samplingRulesPollingInterval: defaultPollingInterval * time.Second,
-		logger:                       stdr.NewWithOptions(log.New(os.Stderr, "", log.LstdFlags|log.Lshortfile), stdr.Options{LogCaller: stdr.Error}),
+		logger:                       defaultLogger,
 	}
 
 	for _, option := range opts {

samplers/aws/xray/remote_sampler_config_test.go

@@ -15,16 +15,13 @@
 package xray
 
 import (
-	"log"
 	"net/url"
-	"os"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/require"
 
 	"github.com/go-logr/logr"
-	"github.com/go-logr/stdr"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -51,7 +48,7 @@ func TestDefaultConfig(t *testing.T) {
 
 	assert.Equal(t, cfg.samplingRulesPollingInterval, 300*time.Second)
 	assert.Equal(t, cfg.endpoint, *endpoint)
-	assert.Equal(t, cfg.logger, stdr.NewWithOptions(log.New(os.Stderr, "", log.LstdFlags|log.Lshortfile), stdr.Options{LogCaller: stdr.Error}))
+	assert.Equal(t, cfg.logger, defaultLogger)
 }
 
 // assert when some config is provided by user then other config will be picked up from default config.
@@ -64,7 +61,7 @@ func TestPartialUserProvidedConfig(t *testing.T) {
 
 	assert.Equal(t, cfg.samplingRulesPollingInterval, 500*time.Second)
 	assert.Equal(t, cfg.endpoint, *endpoint)
-	assert.Equal(t, cfg.logger, stdr.NewWithOptions(log.New(os.Stderr, "", log.LstdFlags|log.Lshortfile), stdr.Options{LogCaller: stdr.Error}))
+	assert.Equal(t, cfg.logger, defaultLogger)
 }
 
 // assert that valid endpoint would not result in an error.