aws_ecs.FargateTaskDefinition: pidmode Task unsupported

[vduits]

Describe the bug

Reading the pidmode announcement here, the cloudformation description for pidMode here. It explains task is the only option. But currently the FargateTaskDefinition only allows host.

Changing this to host will result in a failed deployment, because host isn't allowed on Fargate (linux) tasks.

Expected Behavior

Consistency between documentation and usable options reflected by synth/deployments in CDK.
Task is the one that is the only one actually supported.

Current Behavior

Error: 'pidMode' can only be set to 'host' for Fargate containers, got: 'task'.
at new FargateTaskDefinition (C:\projects\push-gateway-cdk\node_modules\aws-cdk-lib\aws-ecs\lib\fargate\fargate-task-definition.js:1:2562)

But using the host variant will results in:

Deployment failed: Error: The stack named XXXX failed to deploy: UPDATE_ROLLBACK_COMPLETE: Resource handler returned message: "Invalid request provided: Create TaskDefinition: Tasks using the Fargate launch type do not support pidMode 'host'. The supported value for pidMode is 'task'.

Reproduction Steps

const ftdTask = new ecs.FargateTaskDefinition(stack, `task-that-will-fail-to-synth`, {
    cpu: 1024,
    memoryLimitMiB: 2048,
    pidMode: PidMode.TASK,
});

const ftdHost = new ecs.FargateTaskDefinition(stack, `task-that-will-fail-to-deploy`, {
    cpu: 1024,
    memoryLimitMiB: 2048,
    pidMode: PidMode.HOST,
});

Possible Solution

Switch the checks from pidMode.HOST to pidMode.TASK.

Additional Information/Context

No response

CDK CLI Version

2.139.0

Framework Version

No response

Node.js Version

v20.12.0

OS

windows

Language

TypeScript

Language Version

No response

Other information

(OS is windows for where I ran CDK, the containers are linux as those are the only one allowing pidMode anyway)

[pahud]

yap, looks like we should remove that check.

Are you able to get it deployed using this workaround?

    const task = new ecs.FargateTaskDefinition(this, `task-that-will-fail-to-deploy`, {
      cpu: 1024,
      memoryLimitMiB: 2048,
      pidMode: ecs.PidMode.HOST,
    });
    (task.node.defaultChild as ecs.CfnTaskDefinition).addPropertyOverride('PidMode', 'task');

We just need to make sure removing that check would not cause other issues.

If it works great with you, feel free to submit a tiny PR for this. Thank you.

[github-actions]

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