Revert "Change docker networking stuff"

This reverts commit 29ed903.

integration/control.go

@@ -10,6 +10,7 @@ type ControlServer interface {
 	SaveLog(string) error
 	SaveProfile(string) error
 	Execute(command []string) (string, error)
+	ConnectToNetwork(network *dockertest.Network) error
 	GetHealthEndpoint() string
 	GetEndpoint() string
 	WaitForRunning() error
@@ -19,5 +20,4 @@ type ControlServer interface {
 	GetCert() []byte
 	GetHostname() string
 	GetIP() string
-	GetNetwork() *dockertest.Network
 }

integration/embedded_derp_test.go

@@ -9,6 +9,7 @@ import (
 	"testing"
 
 	"github.com/juanfont/headscale/hscontrol/util"
+	"github.com/juanfont/headscale/integration/dockertestutil"
 	"github.com/juanfont/headscale/integration/hsic"
 	"github.com/juanfont/headscale/integration/tsic"
 	"github.com/ory/dockertest/v3"
@@ -227,10 +228,28 @@ func (s *EmbeddedDERPServerScenario) CreateTailscaleIsolatedNodesInUser(
 		return err
 	}
 
-	network := hsServer.GetNetwork()
-
 	if user, ok := s.users[userStr]; ok {
 		for clientN := 0; clientN < count; clientN++ {
+			networkName := fmt.Sprintf("tsnet-%s-%s-%d",
+				hash,
+				userStr,
+				clientN,
+			)
+			network, err := dockertestutil.GetFirstOrCreateNetwork(
+				s.pool,
+				networkName,
+			)
+			if err != nil {
+				return fmt.Errorf("failed to create or get %s network: %w", networkName, err)
+			}
+
+			s.tsicNetworks[networkName] = network
+
+			err = hsServer.ConnectToNetwork(network)
+			if err != nil {
+				return fmt.Errorf("failed to connect headscale to %s network: %w", networkName, err)
+			}
+
 			version := requestedVersion
 			if requestedVersion == "all" {
 				version = MustTestVersions[clientN%len(MustTestVersions)]

integration/hsic/hsic.go

@@ -305,6 +305,10 @@ func New(
 	return hsic, nil
 }
 
+func (t *HeadscaleInContainer) ConnectToNetwork(network *dockertest.Network) error {
+	return t.container.ConnectToNetwork(network)
+}
+
 func (t *HeadscaleInContainer) hasTLS() bool {
 	return len(t.tlsCert) != 0 && len(t.tlsKey) != 0
 }
@@ -469,11 +473,6 @@ func (t *HeadscaleInContainer) GetEndpoint() string {
 	return fmt.Sprintf("http://%s", hostEndpoint)
 }
 
-// GetEndpoint returns the Headscale endpoint for the HeadscaleInContainer.
-func (t *HeadscaleInContainer) GetNetwork() *dockertest.Network {
-	return t.network
-}
-
 // GetCert returns the public certificate of the HeadscaleInContainer.
 func (t *HeadscaleInContainer) GetCert() []byte {
 	return t.tlsCert