NixOps example for vpc + elastic ip + elastic block storage (requires https://github.com/NixOS/nixops/pull/697)

cntr.nix

let
  region = "us-east-1";
  zone = "us-east-1a";
  accessKeyId = "default";
in {
  resources.ebsVolumes.cntr-disk = {
    accessKeyId = accessKeyId;
    tags.Name = "cntr-disk";
    inherit region;
    zone = zone;
    size = 100;
    volumeType = "gp2";
  };

  cntr-machine = { resources, config, lib, ... }: {
    deployment.targetEnv = "ec2";
    deployment.ec2.accessKeyId = accessKeyId;
    deployment.ec2.region = region;
    deployment.ec2.zone = zone;
    deployment.ec2.instanceType = "m4.xlarge";
    deployment.ec2.associatePublicIpAddress = true;
    deployment.ec2.keyPair = resources.ec2KeyPairs.cntr-key-pair;
    deployment.ec2.elasticIPv4 = resources.elasticIPs.cntr-ip;
    deployment.ec2.ebsInitialRootDiskSize = 30;
    deployment.ec2.subnetId = resources.vpcSubnets.cntr-subnet;
    deployment.ec2.securityGroupIds = [ resources.ec2SecurityGroups.cntr-security-group.name ];


    fileSystems."/scratch" = {
      autoFormat = true;
      fsType = "ext4";
      device = "/dev/xvdj";
      ec2.disk = resources.ebsVolumes.cntr-disk;
    };
  };

  resources.ec2KeyPairs.cntr-key-pair = { inherit region accessKeyId; };

  resources.ec2SecurityGroups.cntr-security-group = { resources, ... }: {
    inherit region accessKeyId;
    vpcId = resources.vpc.cntr-vpc;
    rules = [{ protocol = "-1"; fromPort = 0; toPort = 65535; sourceIp = "0.0.0.0/0"; }];
  };

  resources.vpc.cntr-vpc = {
    inherit region accessKeyId;
    instanceTenancy = "default";
    enableDnsSupport = true;
    enableDnsHostnames = true;
    cidrBlock = "192.168.56.0/24";
  };

  resources.vpcSubnets.cntr-subnet = { resources, ... }: {
    inherit region zone accessKeyId;
    vpcId = resources.vpc.cntr-vpc;
    cidrBlock = "192.168.56.0/25";
    mapPublicIpOnLaunch = true;
    tags.Source = "NixOps";
  };

  resources.elasticIPs.cntr-ip = {
    inherit region accessKeyId;
    vpc = true;
  };

  resources.vpcInternetGateways.cntr-igw = { resources, ... }: {
    inherit region accessKeyId;
    vpcId = resources.vpc.cntr-vpc;
  };

  resources.vpcRouteTables.cntr-route-table =  { resources, ... }: {
    inherit region accessKeyId;
    vpcId = resources.vpc.cntr-vpc;
  };

  resources.vpcRouteTableAssociations.cntr-association = { resources, ... }: {
    inherit region accessKeyId;
    subnetId = resources.vpcSubnets.cntr-subnet;
    routeTableId = resources.vpcRouteTables.cntr-route-table;
  };

  resources.vpcRoutes.cntr-igw-route = { resources, ... }: {
    inherit region accessKeyId;
    routeTableId = resources.vpcRouteTables.cntr-route-table;
    destinationCidrBlock = "0.0.0.0/0";
    gatewayId = resources.vpcInternetGateways.cntr-igw;
  };
}