Add Basic OTEL Tracing to TFBuddy

Earthfile

@@ -48,7 +48,7 @@ build-binary:
 
     WORKDIR /src
     COPY . /src
-    RUN GOARM=${VARIANT#v} go build -ldflags "-X main.GitCommit=$GIT_COMMIT -X main.GitTag=$GIT_TAG" -o tfbuddy  
+    RUN GOARM=${VARIANT#v} go build -ldflags "-X github.com/zapier/tfbuddy/pkg.GitCommit=$GIT_COMMIT -X github.com/zapier/tfbuddy/pkg.GitTag=$GIT_TAG" -o tfbuddy  
     SAVE ARTIFACT tfbuddy
 
 build-docker:

Tiltfile

@@ -180,10 +180,11 @@ test_go(
   labels=["tfbuddy"]
 )
 
-build_cmd='CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -gcflags="all=-N -l" -o build/tfbuddy ./'
+arch="arm64" if str(local("uname -m")).strip('\n') == "arm64" else "amd64"
+build_cmd='CGO_ENABLED=0 GOOS=linux GOARCH={} go build -gcflags="all=-N -l" -o build/tfbuddy ./'
 local_resource(
   'go-build',
-  build_cmd,
+  build_cmd.format(arch),
   deps=[
     './main.go',
     './go.mod',

cmd/root.go

@@ -1,13 +1,19 @@
 package cmd
 
 import (
+	"context"
 	"fmt"
+	"log"
 	"os"
+	"strconv"
+	"strings"
 
 	"github.com/rs/zerolog"
 	"github.com/spf13/cobra"
 
 	"github.com/zapier/tfbuddy/internal/logging"
+	"github.com/zapier/tfbuddy/internal/telemetry"
+	"github.com/zapier/tfbuddy/pkg"
 
 	"github.com/spf13/viper"
 )
@@ -33,7 +39,7 @@ func resolveLogLevel() zerolog.Level {
 
 	lvl, err := zerolog.ParseLevel(logLevel)
 	if err != nil {
-		fmt.Println("could not parse log level, defaulting to 'info'")
+		log.Println("could not parse log level, defaulting to 'info'")
 		lvl = zerolog.InfoLevel
 	}
 	return lvl
@@ -51,6 +57,25 @@ func init() {
 	rootCmd.PersistentFlags().StringVarP(&logLevel, "log-level", "v", "info", "Set the log output level (info, debug, trace)")
 }
 
+func initTelemetry(ctx context.Context) (*telemetry.OperatorTelemetry, error) {
+	enableOtel, _ := strconv.ParseBool(os.Getenv("TFBUDDY_OTEL_ENABLED"))
+	otelHost := os.Getenv("TFBUDDY_OTEL_COLLECTOR_HOST")
+	otelPort := os.Getenv("TFBUDDY_OTEL_COLLECTOR_PORT")
+
+	opts := telemetry.Options{
+		Enabled:   enableOtel,
+		Host:      otelHost,
+		Port:      otelPort,
+		Version:   pkg.GitTag,
+		CommitSHA: pkg.GitCommit,
+	}
+	log.Printf("enabled: %v\thost: %s\tport: %s\n", enableOtel, otelHost, otelPort)
+
+	log.Printf("OpenTelemetry Opts: %+v\n", opts)
+
+	return telemetry.Init(ctx, "tfbuddy", opts)
+}
+
 // initConfig reads in config file and ENV variables if set.
 func initConfig() {
 	if cfgFile != "" {
@@ -67,6 +92,8 @@ func initConfig() {
 		viper.SetConfigName(".tfbuddy")
 	}
 
+	viper.SetEnvPrefix("TFBUDDY")
+	viper.EnvKeyReplacer(strings.NewReplacer("-", "_"))
 	viper.AutomaticEnv() // read in environment variables that match
 
 	// If a config file is found, read it in.

cmd/tfc_hook_handler.go

@@ -1,22 +1,34 @@
 package cmd
 
 import (
+	"context"
+
 	"github.com/spf13/cobra"
 
-	"github.com/zapier/tfbuddy/internal/logging"
 	"github.com/zapier/tfbuddy/pkg/hooks"
 )
 
 var gitlabToken string
+var otelEnabled bool
+var otelCollectorHost string
+var otelCollectorPort string
 
 // tfcHookHandlerCmd represents the run command
 var tfcHookHandlerCmd = &cobra.Command{
 	Use:   "handler",
 	Short: "Start a hooks handler for Gitlab & Terraform cloud.",
 	Long:  ``,
 	Run: func(cmd *cobra.Command, args []string) {
-		logging.SetupLogOutput(resolveLogLevel())
+		ctx := context.Background()
+
+		t, err := initTelemetry(ctx)
+		if err != nil {
+			panic(err)
+		}
+		defer t.Shutdown()
+
 		hooks.StartServer()
+
 	},
 	PreRunE: func(cmd *cobra.Command, args []string) error {
 		return nil

cmd/tfc_lock.go

@@ -1,6 +1,7 @@
 package cmd
 
 import (
+	"context"
 	"fmt"
 	"os"
 
@@ -14,7 +15,8 @@ var tfcLockCmd = &cobra.Command{
 	Short: "Lock a Terraform workspace.",
 	Long:  ``,
 	Run: func(cmd *cobra.Command, args []string) {
-		tfc_utils.LockUnlockWorkspace(tfcToken, tfcWorkspace, true, "Locked from MR")
+		ctx := context.Background()
+		tfc_utils.LockUnlockWorkspace(ctx, tfcToken, tfcWorkspace, true, "Locked from MR")
 	},
 	PreRunE: func(cmd *cobra.Command, args []string) error {
 		if tfcWorkspace == "" {

cmd/tfc_unlock.go

@@ -1,6 +1,7 @@
 package cmd
 
 import (
+	"context"
 	"fmt"
 	"os"
 
@@ -14,7 +15,8 @@ var tfcUnlockCmd = &cobra.Command{
 	Short: "Unlock a Terraform workspace.",
 	Long:  ``,
 	Run: func(cmd *cobra.Command, args []string) {
-		tfc_utils.LockUnlockWorkspace(tfcToken, tfcWorkspace, false, "")
+		ctx := context.Background()
+		tfc_utils.LockUnlockWorkspace(ctx, tfcToken, tfcWorkspace, false, "")
 	},
 	PreRunE: func(cmd *cobra.Command, args []string) error {
 		if tfcWorkspace == "" {

go.mod

@@ -18,19 +18,29 @@ require (
 	github.com/jessevdk/go-flags v1.5.0
 	github.com/kr/pretty v0.3.1
 	github.com/labstack/echo-contrib v0.13.0
-	github.com/labstack/echo/v4 v4.9.1
+	github.com/labstack/echo/v4 v4.10.2
 	github.com/nats-io/nats-server/v2 v2.9.8
-	github.com/nats-io/nats.go v1.21.0
+	github.com/nats-io/nats.go v1.25.0
 	github.com/prometheus/client_golang v1.14.0
 	github.com/rs/zerolog v1.28.0
 	github.com/rzajac/zltest v0.12.0
-	github.com/sl1pm4t/gongs v0.0.0-20221205005205-6f4e6d147fab
+	github.com/sl1pm4t/gongs v0.0.0-20230501190600-06976a7fac23
 	github.com/spf13/cobra v1.6.1
-	github.com/spf13/viper v1.14.0
+	github.com/spf13/viper v1.15.0
 	github.com/stretchr/testify v1.8.4
 	github.com/xanzy/go-gitlab v0.77.0
 	github.com/ziflex/lecho/v3 v3.3.0
-	golang.org/x/oauth2 v0.3.0
+	go.opentelemetry.io/contrib/instrumentation/github.com/labstack/echo/otelecho v0.40.0
+	go.opentelemetry.io/contrib/instrumentation/runtime v0.40.0
+	go.opentelemetry.io/otel v1.14.0
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v0.37.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.14.0
+	go.opentelemetry.io/otel/metric v0.37.0
+	go.opentelemetry.io/otel/sdk v1.14.0
+	go.opentelemetry.io/otel/sdk/metric v0.37.0
+	go.opentelemetry.io/otel/trace v1.14.0
+	golang.org/x/oauth2 v0.4.0
+	google.golang.org/grpc v1.53.0
 	gopkg.in/dealancer/validate.v2 v2.1.0
 	gopkg.in/errgo.v2 v2.1.0
 	gopkg.in/yaml.v2 v2.4.0
@@ -48,9 +58,12 @@ require (
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/fsnotify/fsnotify v1.6.0 // indirect
 	github.com/go-git/gcfg v1.5.0 // indirect
+	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.7.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/go-retryablehttp v0.7.4 // indirect
 	github.com/hashicorp/go-slug v0.11.1 // indirect
@@ -67,14 +80,13 @@ require (
 	github.com/leodido/go-urn v1.2.1 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.16 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/minio/highwayhash v1.0.2 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/nats-io/jwt/v2 v2.3.0 // indirect
-	github.com/nats-io/nkeys v0.3.0 // indirect
+	github.com/nats-io/nkeys v0.4.4 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
-	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
 	github.com/pjbgf/sha1cd v0.2.3 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
@@ -88,20 +100,25 @@ require (
 	github.com/spf13/cast v1.5.0 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/subosito/gotenv v1.4.1 // indirect
+	github.com/subosito/gotenv v1.4.2 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasttemplate v1.2.2 // indirect
 	github.com/xanzy/ssh-agent v0.3.3 // indirect
 	github.com/zclconf/go-cty v1.13.2 // indirect
-	golang.org/x/crypto v0.5.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.14.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric v0.37.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.14.0 // indirect
+	go.opentelemetry.io/proto/otlp v0.19.0 // indirect
+	golang.org/x/crypto v0.8.0 // indirect
 	golang.org/x/mod v0.8.0 // indirect
-	golang.org/x/net v0.5.0 // indirect
+	golang.org/x/net v0.9.0 // indirect
 	golang.org/x/sync v0.3.0 // indirect
-	golang.org/x/sys v0.5.0 // indirect
-	golang.org/x/text v0.6.0 // indirect
+	golang.org/x/sys v0.7.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
-	golang.org/x/tools v0.5.0 // indirect
+	golang.org/x/tools v0.6.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/DATA-DOG/go-sqlmock.v1 v1.3.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect