c738542201
This PR adds opentelemetry and chi wrapper to have basic instrumentation <!--start release-notes-assistant--> ## Draft release notes <!--URL:https://codeberg.org/forgejo/forgejo--> - Features - [PR](https://codeberg.org/forgejo/forgejo/pulls/3972): <!--number 3972 --><!--line 0 --><!--description YWRkIHN1cHBvcnQgZm9yIGJhc2ljIHJlcXVlc3QgdHJhY2luZyB3aXRoIG9wZW50ZWxlbWV0cnk=-->add support for basic request tracing with opentelemetry<!--description--> <!--end release-notes-assistant--> Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/3972 Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org> Co-authored-by: TheFox0x7 <thefox0x7@gmail.com> Co-committed-by: TheFox0x7 <thefox0x7@gmail.com>
121 lines
3.5 KiB
Go
121 lines
3.5 KiB
Go
// Copyright 2024 TheFox0x7. All rights reserved.
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// SPDX-License-Identifier: EUPL-1.2
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package opentelemetry
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import (
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"context"
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"crypto/ed25519"
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"crypto/rand"
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"crypto/tls"
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"crypto/x509"
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"crypto/x509/pkix"
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"encoding/pem"
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"math/big"
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"net"
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"os"
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"strings"
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"testing"
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"time"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/test"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"go.opentelemetry.io/otel"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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"go.opentelemetry.io/otel/sdk/trace/tracetest"
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)
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func TestNoopDefault(t *testing.T) {
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inMem := tracetest.NewInMemoryExporter()
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called := false
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exp := func(ctx context.Context) (sdktrace.SpanExporter, error) {
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called = true
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return inMem, nil
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}
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exporter["inmemory"] = exp
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t.Cleanup(func() {
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delete(exporter, "inmemory")
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})
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defer test.MockVariableValue(&setting.OpenTelemetry.Traces, "inmemory")
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ctx := context.Background()
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require.NoError(t, Init(ctx))
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tracer := otel.Tracer("test_noop")
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_, span := tracer.Start(ctx, "test span")
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defer span.End()
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assert.False(t, span.SpanContext().HasTraceID())
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assert.False(t, span.SpanContext().HasSpanID())
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assert.False(t, called)
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}
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func generateTestTLS(t *testing.T, path, host string) *tls.Config {
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_, priv, err := ed25519.GenerateKey(rand.Reader)
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require.NoError(t, err, "Failed to generate private key: %v", err)
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keyUsage := x509.KeyUsageDigitalSignature
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notBefore := time.Now()
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notAfter := notBefore.Add(time.Hour)
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serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
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serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
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require.NoError(t, err, "Failed to generate serial number: %v", err)
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template := x509.Certificate{
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SerialNumber: serialNumber,
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Subject: pkix.Name{
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Organization: []string{"Forgejo Testing"},
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},
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NotBefore: notBefore,
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NotAfter: notAfter,
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KeyUsage: keyUsage,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
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BasicConstraintsValid: true,
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}
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hosts := strings.Split(host, ",")
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for _, h := range hosts {
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if ip := net.ParseIP(h); ip != nil {
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template.IPAddresses = append(template.IPAddresses, ip)
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} else {
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template.DNSNames = append(template.DNSNames, h)
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}
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}
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derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, priv.Public(), priv)
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require.NoError(t, err, "Failed to create certificate: %v", err)
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certOut, err := os.Create(path + "/cert.pem")
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require.NoError(t, err, "Failed to open cert.pem for writing: %v", err)
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if err := pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes}); err != nil {
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t.Fatalf("Failed to write data to cert.pem: %v", err)
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}
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if err := certOut.Close(); err != nil {
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t.Fatalf("Error closing cert.pem: %v", err)
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}
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keyOut, err := os.OpenFile(path+"/key.pem", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o600)
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require.NoError(t, err, "Failed to open key.pem for writing: %v", err)
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privBytes, err := x509.MarshalPKCS8PrivateKey(priv)
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require.NoError(t, err, "Unable to marshal private key: %v", err)
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if err := pem.Encode(keyOut, &pem.Block{Type: "PRIVATE KEY", Bytes: privBytes}); err != nil {
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t.Fatalf("Failed to write data to key.pem: %v", err)
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}
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if err := keyOut.Close(); err != nil {
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t.Fatalf("Error closing key.pem: %v", err)
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}
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serverCert, err := tls.LoadX509KeyPair(path+"/cert.pem", path+"/key.pem")
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require.NoError(t, err, "failed to load the key pair")
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return &tls.Config{
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Certificates: []tls.Certificate{serverCert},
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ClientAuth: tls.RequireAnyClientCert,
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}
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}
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