Run fleet with on demand instance across AZlg...
Hello,
I wanted to start EC2 fleet with on-demand instances only, and I wanted them to be distributed across availability zones. Unfortunately, I couldn't find a way to do that, and all the instances are always started in a single AZ.
That is not a problem with spot instances, as they spawn in all the AZ.
I was trying to try different allocation strategies and priorities, but nothing helped.
I was trying to do so in AWS-CDK, using both `CfnEC2Fleet` [link](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.CfnEC2Fleet.html) as well as `CfnSpotFleet` [link](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.CfnSpotFleet.html). Bellow is my code.
Is there way how to achieve that, or do I need to use something else?
Thank you.
```typescript
const spotFleet = new CfnSpotFleet(stack, 'EC2-Fleet', {
spotFleetRequestConfigData: {
allocationStrategy: 'lowestPrice',
targetCapacity: 8,
iamFleetRole: fleetRole.roleArn,
spotMaintenanceStrategies: {
capacityRebalance: {
replacementStrategy: 'launch-before-terminate',
terminationDelay: 120,
}
},
onDemandTargetCapacity: 4,
instancePoolsToUseCount: stack.availabilityZones.length,
launchTemplateConfigs: [{
launchTemplateSpecification: {
launchTemplateId: launchTemplate.launchTemplateId,
version: launchTemplate.latestVersionNumber,
},
overrides: privateSubnets.map(subnet => ({
availabilityZone: subnet.subnetAvailabilityZone,
subnetId: subnet.subnetId,
})),
}],
}
});
const ec2Fleet = new CfnEC2Fleet(stack, 'EC2-EcFleet', {
targetCapacitySpecification: {
totalTargetCapacity: 6,
onDemandTargetCapacity: 6,
defaultTargetCapacityType: 'on-demand',
},
replaceUnhealthyInstances: true,
onDemandOptions: {
allocationStrategy: 'prioritized',
},
launchTemplateConfigs: [{
launchTemplateSpecification: {
launchTemplateId: launchTemplate.launchTemplateId,
version: launchTemplate.latestVersionNumber,
},
overrides: privateSubnets.map(subnet => ({
availabilityZone: subnet.subnetAvailabilityZone,
subnetId: subnet.subnetId,
})),
}]
});
```
Where `launchTemplate` is instance of [`LaunchTemplate`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.LaunchTemplate.html) and `privateSubnets` is array of [`Subnet`](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.Subnet.html) instances, one for each AZ.lg...
