Support for multi-subnet fleets. #115

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1. bethac07

   added

   enhancement

   on Nov 4, 2020
2. ErinWeisbart commented on Oct 4, 2022

   

   ErinWeisbart

   on Oct 4, 2022

   Member

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   Depending on how your subnets are set up, you may have limitations on the number of machines you can use in the subnets because IPs are limited.
   Would also simplify troubleshooting when the machine types you want are limited in availability.

   Can probably fix by restructuring fleet file. (Make a dummy request in the console and copy that structure to our fleet file).
3. ErinWeisbart commented on Oct 8, 2024

   

   ErinWeisbart

   on Oct 8, 2024

   Last edited by ErinWeisbart

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   Tried this config to get rid of subnet. Worked once. Second time gave me
   spotFleetRequestConfigurationInvalid : m5.xlarge, ami-fad25980, Linux/UNIX: Security group sg-GROUP and subnet subnet-SUBNET belong to different networks.

   {
   "IamFleetRole": "arn:aws:iam::XXXXXXXXXXXX:role/aws-ec2-spot-fleet-role",
   "AllocationStrategy": "lowestPrice",
   "TerminateInstancesWithExpiration": true,
   "LaunchSpecifications": [
           {
           "ImageId": "ami-fad25980",
           "KeyName": "KEYNAME",
           "IamInstanceProfile": {
                   "Arn": "arn:aws:iam::XXXXXXXXXXXX:instance-profile/ecsInstanceRole"
           },
           "BlockDeviceMappings": [
           {
                           "DeviceName": "/dev/xvda",
                           "Ebs": {
                           "DeleteOnTermination": true,
                           "VolumeType": "gp2",
                           "VolumeSize": 8,
                           "SnapshotId": "snap-04007a196c0f3f398"
                   }
                   },
                   {
                   "DeviceName": "/dev/xvdcz",
                   "Ebs": {
                           "DeleteOnTermination": true,
                           "VolumeType": "gp2"
                   }
                   }
           ],
           "SecurityGroups": [{"GroupId":"sg-ZZZZZZZZZ"}]
                   }
           ],
   "Type": "maintain"
   }
   
4. ErinWeisbart commented on May 15, 2026

   

   ErinWeisbart

   on May 15, 2026

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   This works for multi-subnet fleet requests (h/t @bethac07 )

   {
   "IamFleetRole": "arn:aws:iam::XXXXXXXXXXXX:role/aws-ec2-spot-fleet-tagging-role",
   "AllocationStrategy": "lowestPrice",
   "TerminateInstancesWithExpiration": true,
   "LaunchSpecifications": [
       {
       "ImageId": "ami-0ce03502c5bb5e188",
       "SubnetId": "subnet-AAAAAAAA, subnet-BBBBBBBBB, subnet-CCCCCCCC, subnet-DDDDDDDDD",
       "KeyName": "KEYNAME",
       "IamInstanceProfile": {
   "Arn": "arn:aws:iam:: XXXXXXXXXXXX:instance-profile/ecsInstanceRole"
       },
        "SecurityGroups": [
           {
             "GroupId": "sg-XXXXXXXXXXXX"
           }
   ],
       "BlockDeviceMappings": [
           {
       "DeviceName": "/dev/xvda",
       "Ebs": {
       "DeleteOnTermination": true,
       "VolumeType": "gp3",
       "VolumeSize": 24,
       "SnapshotId": "snap-0a7b4ece894d62882"
       }
   },
   {
       "DeviceName": "/dev/xvdcz",
       "Ebs": {
       "DeleteOnTermination": true,
       "VolumeType": "gp3"
       }
   }
       ]
       }
   ],
   "Type": "maintain"
   }