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This guide walks you through setting up Application Performance Monitoring (APM) on a Go application. These instructions can also be found on the Installation page in your Middleware Account. View example code here.

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Prerequisites

1

Infra Agent

Infrastructure Agent (Infra Agent). To install the Infra Agent, see our installation guide.
2

Go Version

Go version 1.17 or above. Check your Go version with the following command:
Shell
go version

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Install

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Step 1: Install Go APM Package

Run the following command in your terminal.
Go
go get github.com/middleware-labs/golang-apm

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Step 2: Import Tracker

Add the following lines to the beginning of your application code base.
Go
import (
    track "github.com/middleware-labs/golang-apm/tracker"
)
Add the following snippet to your main function. The access token is your account key, which can be found on the Installation page. If using a Golang web framework, additional code may be required, see Step 3.
Go
go track.Track(
    track.WithConfigTag("service", {APM-SERVICE-NAME}),
    track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)

​
Step 3: Framework-Specific Configuration

If any of the following Go web frameworks are used in your application, additional configuration is required. View additional configuration steps per framework below.
Middleware APM requires Gin version 1.1.18 or higher.Install the Middleware APM Gin package.
Go
go get github.com/middleware-labs/golang-apm-gin
Add the Middleware APM Gin package to the existing import statement from Step 2.
Go
import (
     track "github.com/middleware-labs/golang-apm/tracker"
     mwgin "github.com/middleware-labs/golang-apm-gin/gin"
)
Initialize the Middleware APM wherever the Gin package is initialized, typically in the main function.
Go
r := gin.Default()
config, _ := track.Track(
     track.WithConfigTag("service","<apm-service-name>"),
     track.WithConfigTag("accessToken","<xxxxxxxxxx>"),
)
r.Use(mwgin.Middleware(config))
Middleware APM requires MUX version 1.8.0Install the Middleware APM MUX package.
Go
go get github.com/middleware-labs/golang-apm-mux
Add the Middleware APM MUX package to the existing import statement from Step 2.
Go
import (
     track "github.com/middleware-labs/golang-apm/tracker"
     mwmux "github.com/middleware-labs/golang-apm-mux/mux"
)
Initialize the Middleware APM wherever the MUX package is initialized, typically in the main function.
Go
r := mux.newRouter()
config, _ := track.Track(
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
r.Use(mwmux.Middleware(config))
Middleware APM requires go-chi/chi version 1.5.4 or higher.Install the Middleware APM go-chi package.
Go
go get github.com/middleware-labs/agent-apm-go-chi-legacy
Add the Middleware APM go-chi package to the existing import statement from Step 2.
Go
import (
     track "github.com/middleware-labs/golang-apm/tracker"
     mwchi "github.com/middleware-labs/agent-apm-go-chi-legacy"
)
Initialize the Middleware APM wherever the go-chi package is initialized, typically in the main function.
Go
config, _ := track.Track(
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
r := chi.NewRouter()
r.Use(mwchi.Middleware("<my-server>", mwchi.WithChiRoutes(r)))
Middleware APM requires go-chi/chi/v5 version 5.0.8 or higher.Install the Middleware APM go-chi package.
Go
go get github.com/middleware-labs/agent-apm-go-chi
Add the Middleware APM go-chi package to the existing import statement from Step 2.
Go
import (
     track "github.com/middleware-labs/golang-apm/tracker"
     mwchi "github.com/middleware-labs/agent-apm-go-chi"
)
Initialize the Middleware APM wherever the go-chi package is initialized, typically in the main function.
Go
config, _ := track.Track(
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
r := chi.NewRouter()
r.Use(mwchi.Middleware("<my-server>", mwchi.WithChiRoutes(r)))
Middleware APM requires astaxie/beego version 1.12.3 or higher.Install the Middleware APM astaxie-beego package.
Go
go get github.com/middleware-labs/golang-apm-beego
Add the Middleware APM astaxie-beego package to the existing import statement from Step 2.
Go
import (
     track "github.com/middleware-labs/golang-apm/tracker"
     mw_beego "github.com/middleware-labs/golang-apm-beego/beego"
)
Initialize the Middleware APM wherever the astaxie-beego package is initialized, typically in the main function.
Golang
config, _ := track.Track(_
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
mware := mw_beego.Middleware(config)
Middleware APM requires beego/v2 version 2.0.7 or higher.Install the Middleware APM astaxie-beego package.
Go
go get github.com/middleware-labs/golang-apm-beego
Add the Middleware APM astaxie-beego package to the existing import statement from Step 2.
Go
import (
     track "github.com/middleware-labs/golang-apm/tracker"
     mw_beego "github.com/middleware-labs/golang-apm-beego/beego"
)
Initialize the Middleware APM wherever the astaxie-beego package is initialized, typically in the main function.
Go
config, _ := track.Track(_
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
mware := mw_beego.Middleware(config)
Middleware APM requires go-sql-driver/mysql version 1.7.1 or higher.Install the Middleware APM SQL package.
Go
go get github.com/middleware-labs/golang-apm-sql
Add the Middleware APM SQL package to the existing import statement from Step 2.
Go
import (
     track "github.com/middleware-labs/golang-apm/tracker"
     mw_sql "github.com/middleware-labs/golang-apm-sql/sql"
)
Initialize the Middleware APM wherever the SQL package is initialized, typically in the main function.
Go
config, _ := track.Track(
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
db, err := mw_sql.Open("mysql", "uname:password@tcp(127.0.0.1:3306)/todo")
Middleware APM requires go-pg/pg version 10.11.1 or higher.Install the Middleware APM PG package.
Go
go get github.com/middleware-labs/golang-apm-pg
Add the Middleware APM PG package to the existing import statement from Step 2.
Go
import (
     "github.com/go-pg/pg/v10"
          track "github.com/middleware-labs/golang-apm/tracker"
          mw_pg "github.com/middleware-labs/golang-apm-pg/pg"
)
Initialize the Middleware APM wherever the PG package is initialized, typically in the main function.
Go
config, _ := track.Track(_
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
db := pg.Connect(&pg.Options{
               Addr:      ":5432",
               User:      "postgres",
               Password:  "postgres",
               Database:  "dbname",
          })
mw_pg.AddQueryHook(db)
Middleware APM requires jinzhu/gorm version 1.9.16 or higher.Install the Middleware APM SQL package.
Go
go get github.com/middleware-labs/golang-apm-sql
Add the Middleware APM SQL package to the existing import statement from Step 2.
Go
import (
     track "github.com/middleware-labs/golang-apm/tracker"
     mw_sql "github.com/middleware-labs/golang-apm-sql/sql"
)
Initialize the Middleware APM inside the main function.
Go
config, _ := track.Track(_
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
db, err := mw_sql.Open(driverName, dataSourceName, mw_sql.WithDBName(dbname), mw_sql.WithAttributes(tracker.String("db.system","mysql")))
Middleware APM requires gorm.io/gorm version 1.25.1 or higher.Install the Middleware APM GORM package.
Go
go get github.com/middleware-labs/go-agent-gorm
Add the Middleware APM GORM package to the existing import statement from Step 2.
Go
import (
     "gorm.io/gorm"
     "gorm.io/driver/mysql"
          track "github.com/middleware-labs/golang-apm/tracker"
          mw_gorm "github.com/middleware-labs/go-agent-gorm/gorm"
)
Initialize the Middleware APM inside the main function.
Go
config, _ := track.Track(_
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
db, err := gorm.Open(mysql.Open("username:password@tcp(127.0.0.1:3306)/dbname"), &gorm.Config{})
if err != nil {
     panic(err)
}
if err := db.Use(mw_gorm.NewPlugin(mw.gorm.WithDBName("dbname"), mw_gorm.WithAttributes(track.String("db.system", "mysql")))); err != nil {
     panic(err)
}
Then use db.WithContext(ctx) to propagate the active span.
Go
var num int
if err := db.WithContext(ctx).Raw("SELECT 42").Scan(&num).Error; err != nil {
     panic(err)
}
Middleware APM requires go.mongodb.org/mongo-driver version 1.12.1 or higher.Install the Middleware APM Mongo package.
Go
go get github.com/middleware-labs/golang-apm-mongo
Add the Middleware APM Mongo package to the existing import statement from Step 2.
Go
import (
     "go.mongodb.org/mongo-driver/mongo/options"

     track "github.com/middleware-labs/golang-apm/tracker"
     mw_mongo "github.com/middleware-labs/golang-apm-mongo/mongo"
)
Initialize the Middleware APM inside the main function.
Go
config, _ := track.Track(_
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
opts := options.Client()
opts.Monitor = mw_mongo.NewMonitor()
Middleware APM requires google.golang.org/grpc version 1.53.0 or higher.Install the Middleware APM gRPC package.
Go
go get github.com/middleware-labs/golang-apm-grpc
Add the Middleware APM astaxie-beego package to the existing import statement from Step 2.
Go
import (
     track "github.com/middleware-labs/golang-apm/tracker"
     mw_grpc "github.com/middleware-labs/golang-apm-grpc/grpc"
)
Initialize the Middleware APM wherever the astaxie-beego package is initialized, typically in the main function.
Go
config, _ := track.Track(_
     track.WithConfigTag("service", "<apm-service-name>"),
     track.WithConfigTag("accessToken", "<xxxxxxxxxx>"),
)
mware := mwbeego.MiddleWare(config.ServiceName)

​
Step 4: Container Variables

Applications running in a container require an additional environment variable. If your application is not running in a container, move to Step 5.

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Docker

Add the following environment variable to your application.
Shell
MW_AGENT_SERVICE=DOCKER_BRIDGE_GATEWAY_ADDRESS
The DOCKER_BRIDGE_GATEWAY_ADDRESS is the IP address of the gateway between the Docker host and bridge network. This is 172.17.0.1 by default. Learn more about Docker bridge networking here

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Kubernetes

Run the following command to find the mw-service in Kubernetes:
Shell
kubectl get service --all-namespaces | grep mw-service
Add the following environment variable to your application deployment YAML file:
Shell
MW_AGENT_SERVICE=mw-service.mw-agent-ns.svc.cluster.local

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Step 5: Capture Application Data

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Traces

Distributed tracing is automatically enabled upon completion of Step 2.

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Custom Logs

To ingest custom logs into Middleware, utilize the following functions inside your logging method based on desired log severity levels.
Go
"github.com/middleware-labs/golang-apm/logger"

....

logger.Error("Error")
logger.Info("Info")
logger.Warn("Warn")

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Profiling

Application Profiling is auto-configured upon completing Step 2.

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Stack Traces

Use the track.RecordError(ctx,error) method to record a stack trace when an error occurs. See an example of this method below.
Go
app.get("/hello", (req, res) => {
    ctx := req.Context()
    try {
        throw ("error");
    } catch (error) {
        track.RecordError(ctx, error)
    }
})

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Continuous Profiling

Continuous profiling captures real-time performance insights from your application to enable rapid identification of resource allocation, bottlenecks, and more. Navigate to the Continuous Profiling section to learn more about using Continuous Profiling with the Go APM.
Need assistance or want to learn more about Middleware? Contact us at support[at]middleware.io.
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