Create a Spot Fleet

Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

In the navigation pane, choose Spot Requests.

If you are new to Spot, you see a welcome page; choose Get started. Otherwise, choose Create Spot Fleet Request.

For Launch parameters, you can either manually configure the launch parameters or you can use a launch template, as follows:

1. [Manually configure] To define the launch parameters in the Amazon EC2 console, choose Manually configure launch parameters, and then do the following:

   1. For AMI, choose one of the basic AMIs provided by AWS, or choose Search for AMI to use an AMI from our user community, the AWS Marketplace, or one of your own.

      Note

      If an AMI specified in the launch parameters is deregistered or disabled, no new instances can be launched from the AMI. For fleets that are set to maintain target capacity, the target capacity will not be maintained.

   2. (Optional) For Key pair name, choose an existing key pair or create a new one.

      [Existing key pair] Choose the key pair.

      [New key pair] Choose Create new key pair to go the Key pairs page. When you are done, return to the Spot Requests page and refresh the list.

   3. (Optional) Expand Additional launch parameters, and do the following:

      1. (Optional) To enable Amazon EBS optimization, for EBS-optimized, select Launch EBS-optimized instances.

      2. (Optional) To add temporary block-level storage for your instances, for Instance store, choose Attach at launch.

      3. (Optional) To add storage, choose Add new volume, and specify additional instance store volumes or Amazon EBS volumes, depending on the instance type.

      4. (Optional) By default, basic monitoring is enabled for your instances. To enable detailed monitoring, for Monitoring, select Enable CloudWatch detailed monitoring.

      5. (Optional) To run a Dedicated Spot Instance, for Tenancy, choose Dedicated - run a dedicated instance.

      6. (Optional) For Security groups, choose one or more security groups or create a new one.

         [Existing security group] Choose one or more security groups.

         [New security group] Choose Create new security group to go the Security Groups page. When you are done, return to the Spot Requests and refresh the list.

      7. (Optional) To make your instances reachable from the internet, for Auto-assign IPv4 Public IP, choose Enable.

      8. (Optional) To launch your Spot Instances with an IAM role, for IAM instance profile, choose the role.

      9. (Optional) To run a start-up script, copy it to User data.

      10. (Optional) To add a tag, choose Create tag and enter the key and value for the tag, and choose Create. Repeat for each tag.

          For each tag, to tag the instances and the Spot Fleet request with the same tag, ensure that both Instances and Fleet are selected. To tag only the instances launched by the fleet, clear Fleet. To tag only the Spot Fleet request, clear Instances.

2. [Launch template] To use a configuration you created in a launch template, choose Use a launch template, and for Launch template, choose a launch template.

   Note

   If you want On-Demand capacity in your Spot Fleet, you must specify a launch template.

For Additional request details, do the following:

1. Review the additional request details. To make changes, clear Apply defaults.

2. (Optional) For IAM fleet role, you can use the default role or choose a different role. To use the default role after changing the role, choose Use default role.

3. (Optional) To create a request that is valid only during a specific time period, edit Request valid from and Request valid until.

4. (Optional) By default, Amazon EC2 terminates your Spot Instances when the Spot Fleet request expires. To keep them running after your request expires, clear Terminate the instances when the request expires.

5. (Optional) To register your Spot Instances with a load balancer, choose Receive traffic from one or more load balancers and choose one or more Classic Load Balancers or target groups.

For Target capacity, do the following:

1. For Total target capacity, specify the number of units to request. For the type of unit, you can choose Instances, vCPUs, or Memory (MiB). To specify a target capacity of 0 so that you can add capacity later, you must first select Maintain target capacity.

2. (Optional) For Include On-Demand base capacity, specify the number of On-Demand units to request. The number must be less than the Total target capacity. Amazon EC2 calculates the difference, and allocates the difference to Spot units to request.

   Important

   To specify optional On-Demand capacity, you must first choose a launch template.

3. (Optional) By default, Amazon EC2 terminates Spot Instances when they are interrupted. To maintain the target capacity, select Maintain target capacity. You can then specify that Amazon EC2 terminates, stops, or hibernates Spot Instances when they are interrupted. To do so, choose the corresponding option from Interruption behavior.

   Note

   If an AMI specified in the launch parameters is deregistered or disabled, no new instances can be launched from the AMI. In this case, for fleets that are set to maintain target capacity, the target capacity will not be maintained.

4. (Optional) To allow Spot Fleet to launch a replacement Spot Instance when an instance rebalance notification is emitted for an existing Spot Instance in the fleet, select Capacity rebalance, and then choose an instance replacement strategy. If you choose Launch before terminate, specify the delay (in seconds) before Amazon EC2 terminates the old instances. For more information, see Use Capacity Rebalancing in EC2 Fleet and Spot Fleet to replace at-risk Spot Instances.

5. (Optional) To control the amount you pay per hour for all the Spot Instances in your fleet, select Set maximum cost for Spot Instances and then enter the maximum total amount you're willing to pay per hour. When the maximum total amount is reached, Spot Fleet stops launching Spot Instances even if it hasn’t met the target capacity. For more information, see Set a spending limit for your EC2 Fleet or Spot Fleet.

For Network, do the following:

1. For Network, choose an existing VPC or create a new one.

   [Existing VPC] Choose the VPC.

   [New VPC] Choose Create new VPC to go the Amazon VPC console. When you're done, return to this screen and refresh the list.

2. (Optional) For Availability Zone, let Amazon EC2 choose the Availability Zones for your Spot Instances, or specify one or more Availability Zones.

   If you have more than one subnet in an Availability Zone, choose the appropriate subnet from Subnet. To add subnets, choose Create new subnet to go to the Amazon VPC console. When you are done, return to this screen and refresh the list.

For Instance type requirements, you can either specify instance attributes and let Amazon EC2 identify the optimal instance types with these attributes, or you can specify a list of instances. For more information, see Specify attributes for instance type selection for EC2 Fleet or Spot Fleet.

1. If you choose Specify instance attributes that match your compute requirements, specify your instance attributes as follows:

   1. For vCPUs, enter the desired minimum and maximum number of vCPUs. To specify no limit, select No minimum or No maximum, or both.

   2. For Memory (GiB), enter the desired minimum and maximum amount of memory. To specify no limit, select No minimum or No maximum, or both.

   3. (Optional) For Additional instance attribute, you can optionally specify one or more attributes to express your compute requirements in more detail. Each additional attribute adds a further constraint to your request. You can omit the additional attributes; when omitted, the default values are used. For a description of each attribute and their default values, see get-spot-placement-scores.

   4. (Optional) To view the instance types with your specified attributes, expand Preview matching instance types. To exclude instance types from being used in your request, select the instances and then choose Exclude selected instance types.

2. If you choose Manually select instance types, Spot Fleet provides a default list of instance types. To select more instance types, choose Add instance types, select the instance types to use in your request, and choose Select. To delete instance types, select the instance types and choose Delete.

For Allocation strategy, choose a Spot allocation strategy and an On-Demand allocation strategy that meets your needs. For more information, see Use allocation strategies to determine how EC2 Fleet or Spot Fleet fulfills Spot and On-Demand capacity.

For Your fleet request at a glance, review your fleet configuration, and make any adjustments if necessary.

(Optional) To download a copy of the launch configuration for use with the AWS CLI, choose JSON config.

When you're ready to launch your Spot Fleet, choose Launch.

The Spot Fleet request type is fleet. When the request is fulfilled, requests of type instance are added, where the state is active and the status is fulfilled.

Follow the steps for creating a Spot Fleet in Create a Spot Fleet request using defined parameters.

To configure the fleet to replace unhealthy Spot Instances, expand Additional launch parameters, and under Health check, select Replace unhealthy instances. To enable this option, you must first choose Maintain target capacity.