cloudwatch-metrics-to-loggly

Sends AWS Cloudwatch metrics to Loggly

More information about AWS Lambda and Loggly

• http://aws.amazon.com/lambda/
• https://www.loggly.com/

Getting started with AWS Lambda

Getting started documentation for AWS lambda can be found in this article. There is also this blog post on how to set things up using the command line tools.

Creating lambda function in AWS

1. Build lambda function code
   • Clone the Git repository:
     git clone https://github.com/psquickitjayant/cloudwatch-metrics-to-loggly.git
   • Go to cloned folder:
     cd cloudwatch-metrics-to-loggly
   • Install dependencies:
     npm install
   • Create a .zip file for upload to AWS console later:
     zip -r cloudwatchMetrics2Loggly.zip index.js node_modules
2. Create Role
   • Sign in to your AWS account and open IAM console https://console.aws.amazon.com/iam/
   • In your IAM console create a new Role say, cloudwatch-full-access
   • Select Role Type as AWS Lambda
   • Apply policy CloudWatchFullAccess and save.
3. Create KMS Key
   • Create a KMS key - http://docs.aws.amazon.com/kms/latest/developerguide/create-keys.html
   • Encrypt the Loggly Customer Token using the AWS CLI
     aws kms encrypt --key-id alias/<your KMS key alias> --plaintext "<your loggly customer token>"
   • Copy or keep CiphertextBlob attribute for furhter usage in the next step.
4. Create lambda function
   • Go to https://console.aws.amazon.com/lambda/home
   • Click Create a Lambda function button.
   • Select Author from scratch option
   • Set Function name for example to cloudwatchMetrics2Loggly
   • Set Runtime to Node.js 10.x
   • Under Permissions click on Choose or create an execution role
   • Select Use an existing role and select cloudwatch-full-access role created above in step 1
   • Click on Create function button
   • Scroll to Function code section
   • Select Upload a .zip file in Code entry type dropdown
   • Upload lambda function (zip file cloudwatchMetrics2Loggly.zip you made above)
   • Go to Environment variables section
   • Define new environment variable kmsEncryptedCustomerToken and set it to CiphertextBlob value from step 3 above (Create KMS Key)
   • Scroll to Basic settings section
   • Set Memory (MB) to 512 MB
   • Set Timeout to 2 minutes
   • Scroll up to Designer section (expand if it's collapsed)
   • Click on CloudWatch Events in Add triggers section to add the trigger item
   • Click on added CloudWatch Events trigger and scroll down to trigger settings
   • Select Create a new rule in Rule dropdown
   • Name: Provide any customized name. e.g. cloudwatchMetrics2Loggly Event Source
   • Description: Invokes Lambda function in every 5 minutes
   • Schedule expression: rate(5 minutes)
   • Make sure the checkbox Enable trigger is checked
   • Click on Add
   • Click on Save to save the whole lambda function.
   • Wait for the events to occur in Loggly

NOTE: Always use latest version of AWSCLI. Some features like KMS may not work on older versions of AWSCLI. To upgrade, use the command given below

pip install --upgrade awscli