AWS ECS Deregister Task definitions Bulk

aws-ecs-deregister-task-definitions.js

const skipTaskDefList = [ /* List of task names to skip deletion. */ ]
const AWS_REGION = "us-west-2"

const { ECSClient, ListTaskDefinitionsCommand, DeregisterTaskDefinitionCommand } = require("@aws-sdk/client-ecs");

async function deleteTaskDef(taskDefARN) {
  const awsClient = new ECSClient({ region: AWS_REGION });
  const deleteCommand = new DeregisterTaskDefinitionCommand({taskDefinition: taskDefARN});
  await awsClient.send(deleteCommand)
  .then((deregisterTaskDefinitionResponse) => {
    const taskDefObj = deregisterTaskDefinitionResponse.taskDefinition;
    console.log(taskDefObj.taskDefinitionArn, taskDefObj.status);
  });
}

async function execute(deleteTasks=false) {
  const awsClient = new ECSClient({ region: AWS_REGION });
  const command = new ListTaskDefinitionsCommand({ status: 'ACTIVE', maxResults: 100 });
  await awsClient.send(command)
  .then((response) => {
    const allTaskDefList = response['taskDefinitionArns'].filter((taskDef) => {
      for (let i=0; i<skipTaskDefList.length; i++){
        if(taskDef.includes(`/${skipTaskDefList[i]}:`)) 
          return false;
      }
      return true;
    });
    console.log("Will delete following task-definition ARNs: \n", allTaskDefList);
    if(!deleteTasks) {
      console.log("!!! Method called in safe mode, Not deleting tasks.");
      return;
    }
    allTaskDefList.forEach(deleteTaskDef);
  });
};

// Will list ARNs, pass true to perform delete. 
execute();

1. Install @aws-sdk/client-ecs:

npm install @aws-sdk/client-ecs
yarn add @aws-sdk/client-ecs
pnpm add @aws-sdk/client-ecs

2. Run:

node aws-ecs-deregister-task-definitions.js

Ref:
ListTaskDefinitionsCommand
DeregisterTaskDefinitionCommand