# IManagedComputeEnvironment

Represents a Managed ComputeEnvironment.

Batch will provision EC2 Instances to
meet the requirements of the jobs executing in this ComputeEnvironment.

Extends: IManagedComputeEnvironment
Extends: IComputeEnvironment, IConnectable, ITaggable
Implemented by: FargateComputeEnvironment, ManagedEc2EcsComputeEnvironment, ManagedEc2EksComputeEnvironment

- Source: [`aws-batch/lib/managed-compute-environment.ts`](https://github.com/aws/aws-cdk/blob/v2.273.0/packages/aws-cdk-lib/aws-batch/lib/managed-compute-environment.ts#L21)
- Type last changed: v2.96.0 · 13 Sep 2023

## Properties

- `computeEnvironmentArn`: string (required) — The ARN of this compute environment.

- `computeEnvironmentName`: string (required) — The name of the ComputeEnvironment.

- `computeEnvironmentRef`: [ComputeEnvironmentReference](/cdk/api/v2/docs/aws-cdk-lib.interfaces.aws_batch.ComputeEnvironmentReference.html) (required) — A reference to a ComputeEnvironment resource.

- `connections`: [Connections](/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.Connections.html) (required) — The network connections associated with this resource.

- `enabled`: boolean (required) — Whether or not this ComputeEnvironment can accept jobs from a Queue.

  Enabled ComputeEnvironments can accept jobs from a Queue and
  can scale instances up or down.
  Disabled ComputeEnvironments cannot accept jobs from a Queue or
  scale instances up or down.

  If you change a ComputeEnvironment from enabled to disabled while it is executing jobs,
  Jobs in the `STARTED` or `RUNNING` states will not
  be interrupted. As jobs complete, the ComputeEnvironment will scale instances down to `minvCpus`.

  To ensure you aren't billed for unused capacity, set `minvCpus` to `0`.

- `env`: [ResourceEnvironment](/cdk/api/v2/docs/aws-cdk-lib.interfaces.ResourceEnvironment.html) (required) — The environment this resource belongs to.

  For resources that are created and managed in a Stack (those created by
  creating new class instances like `new Role()`, `new Bucket()`, etc.), this
  is always the same as the environment of the stack they belong to.

  For referenced resources (those obtained from referencing methods like
  `Role.fromRoleArn()`, `Bucket.fromBucketName()`, etc.), they might be
  different than the stack they were imported into.

- `maxvCpus`: number (required) — The maximum vCpus this `ManagedComputeEnvironment` can scale up to.

  *Note*: if this Compute Environment uses EC2 resources (not Fargate) with either `AllocationStrategy.BEST_FIT_PROGRESSIVE` or
  `AllocationStrategy.SPOT_CAPACITY_OPTIMIZED`, or `AllocationStrategy.BEST_FIT` with Spot instances,
  The scheduler may exceed this number by at most one of the instances specified in `instanceTypes`
  or `instanceClasses`.

- `node`: [Node](/cdk/api/v2/docs/constructs.Node.html) (required) — The tree node.

- `replaceComputeEnvironment`: boolean — Specifies whether this Compute Environment is replaced if an update is made that requires replacing its instances.

  To enable more properties to be updated,
  set this property to `false`. When changing the value of this property to false,
  do not change any other properties at the same time.
  If other properties are changed at the same time,
  and the change needs to be rolled back but it can't,
  it's possible for the stack to go into the UPDATE_ROLLBACK_FAILED state.
  You can't update a stack that is in the UPDATE_ROLLBACK_FAILED state.
  However, if you can continue to roll it back,
  you can return the stack to its original settings and then try to update it again.

  The properties which require a replacement of the Compute Environment are:

- `securityGroups`: [ISecurityGroup](/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.ISecurityGroup.html)[] (required) — The security groups this Compute Environment will launch instances in.

- `serviceRole`: [IRole](/cdk/api/v2/docs/aws-cdk-lib.aws_iam.IRole.html) = a serviceRole will be created for managed CEs, none for unmanaged CEs — The role Batch uses to perform actions on your behalf in your account, such as provision instances to run your jobs.

  **Default:** a serviceRole will be created for managed CEs, none for unmanaged CEs

- `spot`: boolean = false — Whether or not to use spot instances.

  Spot instances are less expensive EC2 instances that can be
  reclaimed by EC2 at any time; your job will be given two minutes
  of notice before reclamation.

- `stack`: [Stack](/cdk/api/v2/docs/aws-cdk-lib.Stack.html) (required) — The stack in which this resource is defined.

- `tags`: [TagManager](/cdk/api/v2/docs/aws-cdk-lib.TagManager.html) (required) — TagManager to set, remove and format tags.

- `terminateOnUpdate`: boolean = false — Whether or not any running jobs will be immediately terminated when an infrastructure update occurs.

  If this is enabled, any terminated jobs may be retried, depending on the job's
  retry policy.

- `updateTimeout`: [Duration](/cdk/api/v2/docs/aws-cdk-lib.Duration.html) = 30 minutes — Only meaningful if `terminateOnUpdate` is `false`.

  If so,
  when an infrastructure update is triggered, any running jobs
  will be allowed to run until `updateTimeout` has expired.

- `updateToLatestImageVersion`: boolean = false — Whether or not the AMI is updated to the latest one supported by Batch when an infrastructure update occurs.

  If you specify a specific AMI, this property will be ignored.

  Note: the CDK will never set this value by default, `false` will set by CFN.
  This is to avoid a deployment failure that occurs when this value is set.

- `vpcSubnets`: [SubnetSelection](/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.SubnetSelection.html) — The VPC Subnets this Compute Environment will launch instances in.

## Methods

- `applyRemovalPolicy(policy: RemovalPolicy): void` — Apply the given removal policy to this resource.

  The Removal Policy controls what happens to this resource when it stops
  being managed by CloudFormation, either because you've removed it from the
  CDK application or because you've made a change that requires the resource
  to be replaced.

  The resource can be deleted (`RemovalPolicy.DESTROY`), or left in your AWS
  account for data recovery and cleanup later (`RemovalPolicy.RETAIN`).

- `with(...mixins: IMixin[]): IConstruct` — Applies one or more mixins to this construct.

  Mixins are applied in order. The list of constructs is captured at the
  start of the call, so constructs added by a mixin will not be visited.

  **Parameters**

  - `mixins` — The mixins to apply.

  **Returns:** This construct for chaining