procinfo: Do not treat username issue as an error (minio#34)

If the system cannot fetch username of the minio process owner, it gets
reported as an error in the health report. However, this can happen for
legitimate reasons (e.g. in minio-operator based environments) and is
not something that needs to be flagged as an error.

Fixed by ignoring error when trying to get the username,
Set username to "<non-root>" in case of error

Author: anjalshireesh

health.go

@@ -667,10 +667,11 @@ func GetProcInfo(ctx context.Context, addr string) ProcInfo {
 		return procInfo
 	}
 
+	// In certain environments, it is not possible to get username e.g. minio-operator
+	// Plus it's not a serious error. So ignore error if any.
 	procInfo.Username, err = proc.UsernameWithContext(ctx)
 	if err != nil {
-		procInfo.Error = err.Error()
-		return procInfo
+		procInfo.Username = "<non-root>"
 	}
 
 	return procInfo