Only resolve github.com for healthcheck, fix #170

internal/cli/cli.go

@@ -3,34 +3,14 @@ package cli
 import (
 	"fmt"
 	"net"
-	"time"
-
-	"github.com/qdm12/golibs/files"
-	"github.com/qdm12/golibs/network"
-	"github.com/qdm12/private-internet-access-docker/internal/params"
-	"github.com/qdm12/private-internet-access-docker/internal/publicip"
 )
 
 func HealthCheck() error {
-	paramsReader := params.NewReader(nil)
-	ipStatusFilepath, err := paramsReader.GetIPStatusFilepath()
+	ips, err := net.LookupIP("github.com")
 	if err != nil {
-		return err
-	}
-
-	// Get all VPN ip addresses from openvpn configuration file
-	fileManager := files.NewFileManager()
-	b, err := fileManager.ReadFile(string(ipStatusFilepath))
-	if err != nil {
-		return err
-	}
-	savedPublicIP := net.ParseIP(string(b))
-	publicIP, err := publicip.NewIPGetter(network.NewClient(3 * time.Second)).Get()
-	if err != nil {
-		return err
-	}
-	if !publicIP.Equal(savedPublicIP) {
-		return fmt.Errorf("Public IP address is %s instead of initial vpn IP address %s", publicIP, savedPublicIP)
+		return fmt.Errorf("cannot resolve github.com (%s)", err)
+	} else if len(ips) == 0 {
+		return fmt.Errorf("resolved no IP addresses for github.com")
 	}
 	return nil
 }