doc(README): clarify env var, remove unused public ip field

Signed-off-by: Gyuho Lee <[email protected]>

README.md

@@ -104,8 +104,7 @@ Check out [*components*](./docs/COMPONENTS.md) for a detailed list of components
 
 ### Does GPUd send data to lepton.ai?
 
-It is possible that GPUd sends basic host information to lepton.ai to help understand how GPUd is used (e.g., UUID, hostname). The data is strictly anonymized and **does not contain any senstive data**.
-You can also disable this behavior by setting `GPUD_NO_USAGE_STATS=true` in /etc/default/gpud
+It is possible that GPUd sends basic host information to lepton.ai to help understand how GPUd is used (e.g., UUID, hostname). The data is strictly anonymized and **does not contain any senstive data**. You can disable this behavior by setting `GPUD_NO_USAGE_STATS=true`. If GPUd is run with systemd (default option for the `gpud up` command), you can add `GPUD_NO_USAGE_STATS=true` to the `/etc/default/gpud` environment file.
 
 Once you opt-in to the lepton.ai platform, the GPUd periodically sends more detailed information about the host (e.g., GPU model and metrics), via the secure channel.
 

internal/login/login.go

@@ -67,13 +67,13 @@ func Login(name string, token string, endpoint string, components string, uid st
 
 func Gossip(endpoint string, uid string, address string) error {
 	if os.Getenv("GPUD_NO_USAGE_STATS") == "true" {
-		log.Logger.Debugf("gossip skipped since GPUD_NO_USAGE_STATS=true specified")
+		log.Logger.Debug("gossip skipped since GPUD_NO_USAGE_STATS=true specified")
 		return nil
 	}
+
 	type payload struct {
 		Name          string `json:"name"`
 		ID            string `json:"id"`
-		PublicIP      string `json:"public_ip"`
 		Provider      string `json:"provider"`
 		DaemonVersion string `json:"daemon_version"`
 	}