config: add 'wsl-network-access' to toggle access to CRC from WSL

cmd/crc/cmd/daemon.go

@@ -9,6 +9,7 @@ import (
 	"os"
 	"os/signal"
 	"regexp"
+	"runtime"
 	"syscall"
 	"time"
 
@@ -238,12 +239,7 @@ func run(configuration *types.Configuration) error {
 func gatewayAPIMux() *http.ServeMux {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/hosts/add", func(w http.ResponseWriter, r *http.Request) {
-		acceptJSONStringArray(w, r, func(hostnames []string) error {
-			// Most of the time we will add a hosts entry to resolve this to 127.0.0.1
-			// On a Windows machine running WSL this is the "IP" of the machine within the WSL2 network,
-			// so it is accessible from both WSL2 and Windows
-			return adminhelper.AddToHostsFile(machine.VsockPrivateAddress(), hostnames...)
-		})
+		acceptJSONStringArray(w, r, addEntriesToHostsFile)
 	})
 	mux.HandleFunc("/hosts/remove", func(w http.ResponseWriter, r *http.Request) {
 		acceptJSONStringArray(w, r, func(hostnames []string) error {
@@ -253,6 +249,19 @@ func gatewayAPIMux() *http.ServeMux {
 	return mux
 }
 
+func addEntriesToHostsFile(hostnames []string) error {
+	// Most of the time we will add a hosts entry to resolv to 127.0.0.1
+	// On a Windows machine running WSL and config 'wsl-network-access' is true
+	// "IP" of the machine within the WSL2 network, so it is accessible from both WSL2 and Windows
+	if runtime.GOOS == "windows" {
+		if config.Get(crcConfig.WSLHostAccess).AsBool() {
+			log.Debugf("Enabling WSL to CRC network access")
+			return adminhelper.AddToHostsFile(machine.VsockPrivateAddress(), hostnames...)
+		}
+	}
+	return adminhelper.AddToHostsFile("127.0.0.1", hostnames...)
+}
+
 func networkAPIMux(vn *virtualnetwork.VirtualNetwork) *http.ServeMux {
 	mux := http.NewServeMux()
 	mux.Handle("/", vn.Mux())

pkg/crc/config/settings.go

@@ -34,6 +34,7 @@ const (
 	SharedDirPassword       = "shared-dir-password" // #nosec G101
 	IngressHTTPPort         = "ingress-http-port"
 	IngressHTTPSPort        = "ingress-https-port"
+	WSLHostAccess           = "wsl-host-access"
 )
 
 func RegisterSettings(cfg *Config) {
@@ -89,13 +90,15 @@ func RegisterSettings(cfg *Config) {
 	cfg.AddSetting(ExperimentalFeatures, false, ValidateBool, SuccessfullyApplied,
 		"Enable experimental features (true/false, default: false)")
 
-	// Shared directories configs
 	if runtime.GOOS == "windows" {
+		// Shared directories configs
 		cfg.AddSetting(SharedDirPassword, Secret(""), validateString, SuccessfullyApplied,
 			"Password used while using CIFS/SMB file sharing (It is the password for the current logged in user)")
-
 		cfg.AddSetting(EnableSharedDirs, false, validateSmbSharedDirs, SuccessfullyApplied,
 			"Mounts host's user profile folder at '/' in the CRC VM (true/false, default: false)")
+		// Setting to enable access to CRC vm from wsl
+		cfg.AddSetting(WSLHostAccess, false, ValidateBool, SuccessfullyApplied,
+			"Enable acess to CRC VM within WSL environment (true/false, default: false)")
 	} else {
 		cfg.AddSetting(EnableSharedDirs, true, ValidateBool, SuccessfullyApplied,
 			"Mounts host's home directory at '/' in the CRC VM (true/false, default: true)")