added 64GB spot instance option

targets/slideruleearth-aws/terraform/cluster/sliderule-asg-64gb_mem_spot.tf.OPTION

@@ -0,0 +1,118 @@
+resource "aws_launch_template" "sliderule_template" {
+  name_prefix   = "${var.cluster_name}-"
+  image_id      = data.aws_ami.sliderule_cluster_ami.id
+
+  block_device_mappings {
+    device_name = "/dev/xvda"
+    ebs {
+      volume_size = var.cluster_volume_size
+      volume_type = "gp2"
+      delete_on_termination = true
+    }
+  }
+
+  key_name = var.key_pair_name
+
+  network_interfaces {
+    associate_public_ip_address = true
+    security_groups             = [aws_security_group.sliderule-sg.id]
+  }
+
+  iam_instance_profile {
+    name = aws_iam_instance_profile.s3-role.name
+  }
+
+  user_data = base64encode(<<-EOF
+    #!/bin/bash
+    export ENVIRONMENT_VERSION=${var.environment_version}
+    export IPV4=$(hostname -I | awk '{print $1}')
+    export CLUSTER=${var.cluster_name}
+    export IS_PUBLIC=${var.is_public}
+    export SLIDERULE_IMAGE=${var.container_repo}/sliderule:${var.cluster_version}
+    export PROVISIONING_SYSTEM="https://ps.${var.domain}"
+    export CONTAINER_REGISTRY=${var.container_repo}
+    aws ecr get-login-password --region us-west-2 | docker login --username AWS --password-stdin ${var.container_repo}
+    aws s3 cp s3://sliderule/infrastructure/software/${var.cluster_name}-docker-compose-sliderule.yml ./docker-compose.yml
+    docker pull ${var.container_repo}/oceaneyes
+    docker-compose -p cluster up --detach
+  EOF
+  )
+
+  tag_specifications {
+    resource_type = "instance"
+    tags = {
+      Name                = "${var.cluster_name}-node"
+      Owner               = "SlideRule"
+      Project             = "cluster-${var.cluster_name}"
+      terraform-base-path = replace(path.cwd, "/^.*?(${local.terraform-git-repo}\\/)/", "$1")
+      cost-grouping       = "${var.cluster_name}"
+    }
+  }
+}
+
+
+
+resource "aws_autoscaling_group" "sliderule-cluster" {
+  capacity_rebalance    = true
+  desired_capacity      = var.node_asg_desired_capacity
+  min_size              = var.node_asg_min_capacity
+  max_size              = var.node_asg_max_capacity
+  health_check_type     = "EC2"
+  vpc_zone_identifier   = [ aws_subnet.sliderule-subnet.id ]
+
+  mixed_instances_policy {
+    instances_distribution {
+      on_demand_base_capacity                  = var.node_asg_min_capacity
+      on_demand_percentage_above_base_capacity = 0
+      spot_allocation_strategy                 = var.spot_allocation_strategy
+      spot_max_price                           = var.spot_max_price
+    }
+
+    launch_template {
+      launch_template_specification {
+        launch_template_id = "${aws_launch_template.sliderule_template.id}"
+      }
+
+      override {
+        instance_type = "r8g.2xlarge"
+        weighted_capacity = 1
+      }
+
+      override {
+        instance_type = "r7g.2xlarge"
+        weighted_capacity = 1
+      }
+    }
+  }
+
+  tag {
+    key                 = "Name"
+    value               = "${var.cluster_name}-node"
+    propagate_at_launch = true
+  }
+
+  # the following match the provider "aws" default tags in providers.tf ...
+  tag {
+    key                 = "Owner"
+    value               = "SlideRule"
+    propagate_at_launch = true
+  }
+
+  tag {
+    key                 = "Project"
+    value               = "cluster-${var.cluster_name}"
+    propagate_at_launch = true
+  }
+
+  tag {
+    key                 = "terraform-base-path"
+    value               = replace(path.cwd, "/^.*?(${local.terraform-git-repo}\\/)/", "$1")
+    propagate_at_launch = true
+  }
+
+  tag {
+    key                 = "cost-grouping"
+    value               = "${var.cluster_name}"
+    propagate_at_launch = true
+  }
+}