diff --git a/nixos/modules/virtualisation/docker.nix b/nixos/modules/virtualisation/docker.nix index 3eb0de3a855..954e33ff24a 100644 --- a/nixos/modules/virtualisation/docker.nix +++ b/nixos/modules/virtualisation/docker.nix @@ -150,6 +150,10 @@ in config = mkIf cfg.enable (mkMerge [{ boot.kernelModules = [ "bridge" "veth" ]; + boot.kernel.sysctl = { + "net.ipv4.conf.all.forwarding" = mkOverride 99 true; + "net.ipv4.conf.default.forwarding" = mkOverride 99 true; + }; environment.systemPackages = [ cfg.package ] ++ optional cfg.enableNvidia pkgs.nvidia-docker; users.groups.docker.gid = config.ids.gids.docker; diff --git a/nixos/tests/docker.nix b/nixos/tests/docker.nix index 58e33535ed3..dee7480eb4a 100644 --- a/nixos/tests/docker.nix +++ b/nixos/tests/docker.nix @@ -45,5 +45,8 @@ import ./make-test-python.nix ({ pkgs, ...} : { # Must match version 4 times to ensure client and server git commits and versions are correct docker.succeed('[ $(docker version | grep ${pkgs.docker.version} | wc -l) = "4" ]') + docker.succeed("systemctl restart systemd-sysctl") + docker.succeed("grep 1 /proc/sys/net/ipv4/conf/all/forwarding") + docker.succeed("grep 1 /proc/sys/net/ipv4/conf/default/forwarding") ''; })