Per-VM Customizations

You can change and override microvm.nix and nixos module configurations for each VM. Overrides work the same in both imperative and declarative modes.

For more information, see Mariner options and microvm.nix Options.

    vm = {
      specialArgs = { inherit nixpkgs; };
      config =
        { config, pkgs, ... }: # this points to the vm config to access config.mariner
        {
          imports = builtins.attrValues mariner.nixosModules ++ [ ];
          mariner.cid = 5;
          # Change user name:
          mariner.username = "user";
          mariner.hostAuthorizedKey = "ssh-ed25519 AAAA... your@host";
          # Set VM resources:
          microvm = {
            vcpu = 4;
            mem = 8 * 1024;
          };
          # Share a host directory with the VM:
          microvm.shares = [{
            source = "/home/you/work";
            mountPoint = "/work";
            tag = "work";
            proto = "virtiofs";
          }];

          # Install more packages:
          users.users.${config.mariner.username}.packages = with pkgs; [ btop ];
        };
    };