Create AMI of a given EC2 from cloud formation

I have to create an AMI of a given EC2 istance from cloud formation, ad after create an ec2 from this AMI. How to do this? My principal problem is the first part

The below code is a function that can be called from as a CustomResource to create an AMI.

I haven't used it in a long time but it should still work.

Your CustomResource will need to pass in the Region and Instance (and Tags if you want those).

In order to create a new EC2 instance from this you would need to use the return value of ImageId and input that as the AMI to a AWS::EC2::Instance.

var Aws = require("aws-sdk");
var Response = require('cfn-response');

exports.handler = function (e, c) {

    console.log("REQUEST RECEIVED:\n" + JSON.stringify(e));

    // For Delete requests, immediately send a SUCCESS response.
    if (e.RequestType === "Delete") {
        Response.send(e, c, Response.SUCCESS);
        return;
    }

    console.log("Region=" + e.ResourceProperties.Region);
    console.log("Instance=" + e.ResourceProperties.Instance);

    var ec2 = new Aws.EC2({ region: e.ResourceProperties.Region });
    console.log("ec2=" + ec2);
    console.log("Tags=" + e.ResourceProperties.Tags);

    var params = {
        InstanceId: e.ResourceProperties.Instance,
        Name: e.ResourceProperties.AmiName
    };

    console.log("params=" + params);
    console.log("params.InstanceIds=" + params.InstanceIds);

    var responseStatus = "FAILED";

    ec2.createImage(params, function (err, data) {
        if (err) {
            console.log("createImage.err:" + err.toString(), err.stack.toString());
            Response.send(e, c, Response.FAILED);
        } // an error occurred
        else {
            console.log("createImage" + data);
            responseStatus = "SUCCESS";

            var responseData = {};
            responseData["ImageId"] = data.ImageId;

            var tagParams = {
                Resources: [data.ImageId],
                Tags: e.ResourceProperties.Tags
            }

            ec2.createTags(tagParams, function (err, data) {
                if (err) {
                    data = { Error: "DescribeImages call failed" };
                    console.log(data.Error + ":\n", err);
                    Response.send(e, c, Response.FAILED);
                } else {
                    console.log(data);
                    Response.send(e, c, Response.SUCCESS, responseData);
                }
            });
        }
    });
};