feat(docker): Add flag to enable IPv6 in auto-created networks

internal/app/cmd/exec.go

@@ -58,6 +58,7 @@ type executeArgs struct {
 	image                 string
 	cacheHandler          *artifactcache.Handler
 	network               string
+	enableIPv6            bool
 	githubInstance        string
 }
 
@@ -407,6 +408,7 @@ func runExec(ctx context.Context, execArgs *executeArgs) func(cmd *cobra.Command
 			ContainerNamePrefix:        fmt.Sprintf("FORGEJO-ACTIONS-TASK-%s", eventName),
 			ContainerMaxLifetime:       maxLifetime,
 			ContainerNetworkMode:       container.NetworkMode(execArgs.network),
+			ContainerNetworkEnableIPv6: execArgs.enableIPv6,
 			DefaultActionInstance:      execArgs.defaultActionsURL,
 			PlatformPicker: func(_ []string) string {
 				return execArgs.image
@@ -486,6 +488,7 @@ func loadExecCmd(ctx context.Context) *cobra.Command {
 	execCmd.PersistentFlags().BoolVarP(&execArg.dryrun, "dryrun", "n", false, "dryrun mode")
 	execCmd.PersistentFlags().StringVarP(&execArg.image, "image", "i", "node:16-bullseye", "docker image to use")
 	execCmd.PersistentFlags().StringVarP(&execArg.network, "network", "", "", "Specify the network to which the container will connect")
+	execCmd.PersistentFlags().BoolVarP(&execArg.enableIPv6, "enable-ipv6", "6", false, "Create network with IPv6 enabled.")
 	execCmd.PersistentFlags().StringVarP(&execArg.githubInstance, "gitea-instance", "", "", "Gitea instance to use.")
 
 	return execCmd

internal/app/run/runner.go

@@ -204,6 +204,7 @@ func (r *Runner) run(ctx context.Context, task *runnerv1.Task, reporter *report.
 		ContainerNamePrefix:        fmt.Sprintf("GITEA-ACTIONS-TASK-%d", task.Id),
 		ContainerMaxLifetime:       maxLifetime,
 		ContainerNetworkMode:       container.NetworkMode(r.cfg.Container.Network),
+		ContainerNetworkEnableIPv6: r.cfg.Container.EnableIPv6,
 		ContainerOptions:           r.cfg.Container.Options,
 		ContainerDaemonSocket:      r.cfg.Container.DockerHost,
 		Privileged:                 r.cfg.Container.Privileged,

internal/pkg/config/config.example.yaml

@@ -58,6 +58,9 @@ container:
   # Could be host, bridge or the name of a custom network.
   # If it's empty, create a network automatically.
   network: ""
+  # Whether to create networks with IPv6 enabled. Requires the Docker daemon to be set up accordingly.
+  # Only takes effect if "network" is set to "".
+  enable_ipv6: false
   # Whether to use privileged mode or not when launching task containers (privileged mode is required for Docker-in-Docker).
   privileged: false
   # And other options to be used when the container is started (eg, --add-host=my.forgejo.url:host-gateway).

internal/pkg/config/config.go

@@ -45,6 +45,7 @@ type Cache struct {
 type Container struct {
 	Network       string   `yaml:"network"`        // Network specifies the network for the container.
 	NetworkMode   string   `yaml:"network_mode"`   // Deprecated: use Network instead. Could be removed after Gitea 1.20
+	EnableIPv6    bool     `yaml:"enable_ipv6"`    // EnableIPv6 indicates whether the network is created with IPv6 enabled.
 	Privileged    bool     `yaml:"privileged"`     // Privileged indicates whether the container runs in privileged mode.
 	Options       string   `yaml:"options"`        // Options specifies additional options for the container.
 	WorkdirParent string   `yaml:"workdir_parent"` // WorkdirParent specifies the parent directory for the container's working directory.