Make the CollAgentAddr config optional in controller (#279)

Co-authored-by: Christos Kalkanis <[email protected]>
Co-authored-by: Florian Lehner <[email protected]>

internal/controller/config.go

@@ -30,6 +30,10 @@ type Config struct {
 	Tracers                string
 	VerboseMode            bool
 	Version                bool
+	// HostName is the name of the host.
+	HostName string
+	// IPAddress is the IP address of the host that sends data to CollAgentAddr.
+	IPAddress string
 
 	Reporter reporter.Reporter
 

internal/controller/controller.go

@@ -78,13 +78,8 @@ func (c *Controller) Start(ctx context.Context) error {
 	// OTel semantic introduced in https://github.com/open-telemetry/semantic-conventions/issues/66
 	metadataCollector.AddCustomData("os.kernel.release", kernelVersion)
 
-	// hostname and sourceIP will be populated from the root namespace.
-	hostname, sourceIP, err := helpers.GetHostnameAndSourceIP(c.config.CollAgentAddr)
-	if err != nil {
-		log.Warnf("Failed to fetch metadata information in the root namespace: %v", err)
-	}
-	metadataCollector.AddCustomData("host.name", hostname)
-	metadataCollector.AddCustomData("host.ip", sourceIP)
+	metadataCollector.AddCustomData("host.name", c.config.HostName)
+	metadataCollector.AddCustomData("host.ip", c.config.IPAddress)
 
 	err = c.reporter.Start(ctx)
 	if err != nil {

main.go

@@ -114,6 +114,7 @@ func mainWithExitCode() exitCode {
 		log.Error(err)
 		return exitFailure
 	}
+	cfg.HostName, cfg.IPAddress = hostname, sourceIP
 
 	rep, err := reporter.NewOTLP(&reporter.Config{
 		CollAgentAddr:            cfg.CollAgentAddr,