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How To Invoke A New EC2 Instance With Existing IAM Role? / JavaScript AWS SDK V3 - RunInstancesCommand

How can I launch an EC2 instance with attached (existing) IAM Role in JavaScript?

I know this question has been asked for other languages, but I couldn't find an example for JavaScript.

My JS Lambda code currently looks like:

const { EC2Client } = require( "@aws-sdk/client-ec2");
const ec2Client = new EC2Client({ region: "eu-central-1" }); 
const {
      CreateTagsCommand,
      RunInstancesCommand,
      TerminateInstancesCommand,
      RunInstancesRequest
  } = require("@aws-sdk/client-ec2");      

const instanceParams = {
      ImageId: "ami-00a844bXXXXXXXXXX",
      InstanceType: "a1.xlarge",
      KeyName: "YourKeyName", 
      MinCount: 1,
      MaxCount: 1,
      SecurityGroupIds: ["sg-XXXXXXXXXXXXX"],
      IamInstanceProfile: "arn:aws:iam::390000000000:instance-profile/NAME" // doesn't work
};

const run = async () => {
  try {
    const data = await ec2Client.send(new RunInstancesCommand(instanceParams));
    console.log(data.Instances[0].InstanceId);
  } catch (err) {
    console.log("Error", err);
  }
}

var ret = await run();

Documentation:

https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-ec2/interfaces/runinstancescommandinput.html#iaminstanceprofile


"@aws-sdk/client-ec2": "^3.44.0",
"@aws-sdk/client-lambda": "^3.45.0",

The code above runs, but the IAM Role under the EC2 > Instances > Security tab remains empty in all my tries.

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Answer

For IamInstanceProfile field you need to specify the ARN or name. Try with any of these options:

const instanceParams = {
  ImageId: "ami-00a844bXXXXXXXXXX",
  InstanceType: "a1.xlarge",
  KeyName: "YourKeyName", 
  MinCount: 1,
  MaxCount: 1,
  SecurityGroupIds: ["sg-XXXXXXXXXXXXX"],
  IamInstanceProfile: 
  {
      Name: "NAME"
  }
};

or

    const instanceParams = {
  ImageId: "ami-00a844bXXXXXXXXXX",
  InstanceType: "a1.xlarge",
  KeyName: "YourKeyName", 
  MinCount: 1,
  MaxCount: 1,
  SecurityGroupIds: ["sg-XXXXXXXXXXXXX"],
  IamInstanceProfile: 
  {
      Arn: "arn:aws:iam::390000000000:instance-profile/NAME"
  }
};

JavaScript SDK runInstances

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source: stackoverflow.com
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