Spot Fleet Requests

1. Create an IAM role that grants the Spot fleet permission to bid on, launch, and terminate instances on your behalf. You specify this role, by Amazon Resource Name (ARN), when you create a Spot fleet request.

   1. Open the Identity and Access Management (IAM) console at https://console.aws.amazon.com/iam/.

   2. In the navigation pane, choose Roles, and then choose Create New Role.

   3. On the Set Role Name page, enter a name for the role and then choose Next Step.

   4. On the Select Role Type page, choose Select next to Amazon EC2 Spot Fleet Role.

   5. On the Attach Policy page, select the AmazonEC2SpotFleetRole policy, and then choose Next Step.

   6. On the Review page, choose Create Role.

2. Confirm that the user account that you will use to create the Spot fleet request has the required Amazon EC2 permissions:

   1. Open the Identity and Access Management (IAM) console at https://console.aws.amazon.com/iam/.

   2. In the navigation pane, choose Policies, and then choose Create Policy.

   3. On the Create Policy page, choose Select next to Create Your Own Policy.

   4. On the Review Policy page, enter a policy name and copy the following text into the Policy Document section.

      {
          "Version": "2012-10-17",
          "Statement": [
              {
                  "Effect": "Allow",
                  "Action": [
                      "ec2:*"
                  ],
                  "Resource": "*"
              },
              {
                  "Effect": "Allow",
                  "Action": [
                    "iam:PassRole",
                    "iam:ListRoles",
                    "iam:ListInstanceProfiles"
                  ],
                  "Resource": "*"
              }
          ]
      }

      The ec2:* enables an IAM user to call all Amazon EC2 API actions. To limit the user to specific API actions, specify those actions instead.

      The iam:PassRole action enables the user to specify the Spot fleet role in a Spot fleet request. The iam:ListRoles action enables the user to enumerate existing roles. The iam:ListInstanceProfiles action enables the user to enumerate existing instance profiles. The Amazon EC2 console uses iam:ListRoles to populate the IAM role list and iam:ListInstanceProfiles to populate the IAM instance profile list. To enable the user to create roles or instance profiles using the console, you must add the following actions: iam:CreateRole, iam:CreateInstanceProfile, and iam:AddRoleToInstanceProfile.

   5. Choose Create Policy.

   6. In the navigation pane, choose Users, and then choose the user who will submit the Spot fleet request.

   7. On the Permissions tab, choose Attach Policy.

   8. On the Attach Policy page, select the policy you created above, and choose Attach Policy.

To create a Spot fleet request using the console

1. Open the Spot console at https://console.aws.amazon.com/ec2spot.

2. If you are new to Spot, you see a welcome page; click Get started. Otherwise, click Request Spot Instances.

3. On the Find instance types page, do the following:

   1. For AMI, choose one of the basic Amazon Machine Images (AMI) provided by AWS, or choose Use custom AMI to specify your own AMI.

   2. For Capacity unit, choose the units for your fleet. You can choose instances or performance characteristics that are important to your application workload, such as vCPUs, memory, and storage.

   3. For Target capacity, enter the number of units to request.

   4. For Bid price, enter your bid price. You can specify your bid price per unit hour or as a percentage of the price for On-Demand instances. The Spot fleet launches the requested instances if your bid price exceeds the Spot price for the instances.

   5. Under Select instance types, select one or more instance types. If the instance type that you need is not displayed, click view more. Then, you can filter the list to instance types that have the minimum hardware specifications that you need (vCPUs, memory, and storage).

      By default, the bid price for each instance type is determined by the bid price for the Spot fleet request. You'll see a warning if your bid price is too low for a particular instance type. If needed, you can override the bid price for each instance type that you selected.

      The Weighted capacity column represents the capacity units that each instance type would contribute to your fleet. The default values in the table are based on the capacity unit that you selected. For example, if your capacity unit is instances, the default weight for each instance type is 1. If your capacity unit is vCPUs, the default weight for each instance type is its number of vCPUs. If you prefer particular instance types, you can change their weights. For more information, see Spot Fleet Instance Weighting.

   6. Click Next.

4. On the Configure page, do the following:

   1. For IAM role, specify the IAM role that you created to grant the Spot fleet permission to bid on, launch, and terminate instances on your behalf.

   2. For Allocation strategy, choose the strategy that meets your needs. For more information, see Spot Fleet Allocation Strategy.

   3. For Network, choose a VPC from the list, or choose Create new VPC to go the Amazon VPC console and create one. When you have finished, return to the wizard and click Refresh to load your VPC in the list. If you select a nondefault VPC, select auto-assign at launch from Public IP to assign a public IP address to your instances.

   4. For Security groups, choose one or more security groups.

   5. (Optional) If you have a preference for particular Availability Zones for your instances, from Availability Zones, choose Select, and then choose the Availability Zones. If your VPC is a nondefault VPC, you must select one subnet for each Availability Zone. If your VPC is a default VPC, we select the default subnet for the Availability Zone.

   6. (Optional) If you need to connect to your instance, specify your key pair in Key pair.

   7. (Optional) By default, the Spot fleet request remains in effect until it is fulfilled or you cancel it. To create a request that is valid only during a specific time period, under Advanced, under Request timeframe, specify Valid from and Valid to.

   8. Specify the remaining options you need, and then choose Review.

5. On the Review page, verify the configuration of your Spot fleet request. To make changes, click Previous. To download a copy of the launch configuration for use with the AWS CLI, click JSON config. To create the Spot fleet request, click Launch.

To monitor your Spot fleet using the console

1. Open the Spot console at https://console.aws.amazon.com/ec2spot/home/fleet.

2. Select your Spot fleet request. The configuration details are available in the Description tab.

3. To list the Spot instances for the Spot fleet, select the Instances tab.

4. To view the history for the Spot fleet, select the History tab.

To modify a Spot fleet request using the console

1. Open the Spot console at https://console.aws.amazon.com/ec2spot/home/fleet.

2. Select your Spot fleet request.

3. Click Actions, and then click Modify target capacity.

4. In Modify target capacity, do the following:

   1. Enter the new target capacity.

   2. (Optional) If you are decreasing the target capacity but want to keep the fleet at its current size, deselect Terminate instances.

   3. Click Submit.

To cancel a Spot fleet request using the console

1. Open the Spot console at https://console.aws.amazon.com/ec2spot/home/fleet.

2. Select your Spot fleet request.

3. Click Actions, and then click Cancel spot request.

4. In Cancel spot request, verify that you want to cancel the Spot fleet. To keep the fleet at its current size, deselect Terminate instances. When you are ready, click Confirm.