NodeJS Lambda Region WAF IPSetID - node.js

Question

I am new NodeJS and trying to alter this sample provided by AWS for reputation list updates however it is specific to CloudFront Global Region only.
https://github.com/awslabs/aws-waf-sample/tree/master/waf-reputation-lists
I have made the changes to the CloudFormation to create regional IPSetID however the function exits on the fact the IPSetID does not exist. I assume this is due to the fact the SDK is looking at global rather than regional i.e eu-west-1 therefore I've set the region in the config but it is still unable to locate the IPSet.
var aws = require('aws-sdk');
// configure API retries
aws.config.update({
region:'eu-west-1',
maxRetries: 3,
retryDelayOptions: {
base: 1000
}
});
var waf = new aws.WAF();
I've seen a recent question (AWS WAF update ip sets and rules specific to a region from lambda) which shows the URL differences however I do not know where to start to update the URL?
Error getting IP sets { [WAFNonexistentItemException: The referenced item does not exist.]
message: 'The referenced item does not exist.',
code: 'WAFNonexistentItemException',
statusCode: 400,
retryable: false,
retryDelay: 162.11187234148383 }
Error getting ranges and/or IP sets { [WAFNonexistentItemException: The referenced item does not exist.]
message: 'The referenced item does not exist.',
code: 'WAFNonexistentItemException',
statusCode: 400,
retryable: false,
retryDelay: 162.11187234148383 }
{
"errorMessage": "The referenced item does not exist.",
"errorType": "WAFNonexistentItemException",
"stackTrace": [
"Request.extractError (/var/task/node_modules/aws-sdk/lib/protocol/json.js:48:27)",
"Request.callListeners (/var/task/node_modules/aws-sdk/lib/sequential_executor.js:105:20)",
"Request.emit (/var/task/node_modules/aws-sdk/lib/sequential_executor.js:77:10)",
"Request.emit (/var/task/node_modules/aws-sdk/lib/request.js:682:14)",
"Request.transition (/var/task/node_modules/aws-sdk/lib/request.js:22:10)",
"AcceptorStateMachine.runTo (/var/task/node_modules/aws-sdk/lib/state_machine.js:14:12)",
"/var/task/node_modules/aws-sdk/lib/state_machine.js:26:10",
"Request.<anonymous> (/var/task/node_modules/aws-sdk/lib/request.js:38:9)",
"Request.<anonymous> (/var/task/node_modules/aws-sdk/lib/request.js:684:12)",
"Request.callListeners (/var/task/node_modules/aws-sdk/lib/sequential_executor.js:115:18)"
]
}

Answer 1

You should make sure you have an updated version of the aws-sdk that supports the regional WAF. Change the line var waf = new aws.WAF(); with code similar to the following.
var readline = require('readline');
var aws = require('aws-sdk');
var https = require('https');
var async = require('async');
// configure API retries
aws.config.update({
region:'eu-west-1',
maxRetries: 3,
retryDelayOptions: {
base: 1000
}
});
var waf = new aws.WAFRegional();
var cloudwatch = new aws.CloudWatch();
var cloudformation = new aws.CloudFormation();
I was using versions as follows and got this working. (from package.json node configuration file)
{
"name": "reputation-lists-parser",
"version": "1.0.0",
"description": "",
"main": "reputation-lists-parser.js",
"dependencies": {
"aws-sdk": "^2.76.0",
"async": "^2.4.1",
"xml2js": "^0.4.17"
}
}
You may need to load the entire zip file containing your code into AWS Lambda.
I used the code contained in https://github.com/itopiacloud/aws-waf-regional-security-automations to help me get this working.