Merge pull request #25 from gravitl/v0.1

V0.1

netclient/config/config.go

@@ -203,7 +203,6 @@ func readConfig() *ClientConfig {
 	f, err := os.Open(file)
 	if err != nil {
 		nofile = true
-		fmt.Println("Could not access " + home + "/.netconfig,  proceeding...")
 	}
 	defer f.Close()
 

netclient/functions/local.go

@@ -4,6 +4,7 @@ import (
         //"github.com/davecgh/go-spew/spew"
         "fmt"
         "io/ioutil"
+	"path/filepath"
         "io"
         "log"
         "os"
@@ -11,16 +12,23 @@ import (
 )
 
 func ConfigureSystemD() error {
-
+	/*
 	path, err := os.Getwd()
 	if err != nil {
 		log.Println(err)
 		return err
 	}
+	*/
+	//binarypath := path  + "/netclient"
+	dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
+	if err != nil {
+            return err
+	}
+	binarypath := dir  + "/netclient"
 
-	binarypath := path  + "/netclient"
+	fmt.Println("Installing Binary from Path: " + binarypath)
 
-        _, err = os.Stat("/etc/netclient")
+	_, err = os.Stat("/etc/netclient")
         if os.IsNotExist(err) {
                 os.Mkdir("/etc/netclient", 744)
         } else if err != nil {

netclient/main.go

@@ -7,6 +7,9 @@ import (
         nodepb "github.com/gravitl/netmaker/grpc"
 	"flag"
 	"os"
+        "os/exec"
+        "strconv"
+	"strings"
 	"log"
 )
 
@@ -34,19 +37,61 @@ func main() {
 	taccesskey := flag.String("k", "badkey", "an access key generated by the server and used for one-time access (install only)")
 	tserver := flag.String("s", "localhost:50051", "The location (including port) of the remote gRPC server.")
 	tgroup := flag.String("g", "badgroup", "The node group you are attempting to join.")
-	tnoauto := flag.Bool("na", false, "No auto mode. If true, netmaker will not be installed as a system service and you will have to retrieve updates manually via checkin command.")
+	tnoauto := flag.Bool("na", false, "No auto mode. If true, netmclient will not be installed as a system service and you will have to retrieve updates manually via checkin command.")
+	tnoforward := flag.Bool("nf", false, "No Forward mode. If true, netclient will not check for IP forwarding. This may break functionality")
 	command := flag.String("c", "required", "The command to run")
 
 
         flag.Parse()
 
 
+
+         getID := exec.Command("id", "-u")
+         out, err := getID.Output()
+
+         if err != nil {
+                 log.Fatal(err)
+         }
+         id, err := strconv.Atoi(string(out[:len(out)-1]))
+
+         if err != nil {
+                 log.Fatal(err)
+         }
+
+         if id != 0 {
+                 log.Fatal("This program must be run with elevated privileges (sudo). This program installs a SystemD service and configures WireGuard and networking rules. Please re-run with sudo/root.")
+         }
+
+
+	_, err = exec.LookPath("wg")
+	if err != nil {
+		log.Println(err)
+		log.Fatal("WireGuard not installed. Please install WireGuard (wireguard-tools) and try again.")
+	}
+
         switch *command {
 		case "required":
                         fmt.Println("command flag 'c' is required. Pick one of |install|checkin|update|remove|")
                         os.Exit(1)
 			log.Fatal("Exiting")
                 case "install":
+			if !*tnoforward {
+				forward := exec.Command("sysctl", "net.ipv4.ip_forward")
+				out, err := forward.Output()
+
+				if err != nil {
+					log.Fatal(err)
+				}
+				//s := strings.Split(string(out), " ", "\n")
+				s := strings.Fields(string(out))
+				if err != nil {
+					log.Fatal(err)
+				}
+				if s[2] != "1" {
+					log.Fatal("It is recommended to enable IP Forwarding. Current status is: " +  s[2] + ", but should be 1. if you would like to run without IP Forwarding, re-run with flag '-nf true'")
+				}
+			}
+
 			fmt.Println("Beginning agent installation.")
 			err := functions.Install(*taccesskey, *tpassword, *tserver, *tgroup, *tnoauto)
 			if err != nil {