LogDNA S3 Lambda Function

The integration with Amazon S3 relies on AWS Lambda to route your logs from S3 to LogDNA.

How to Use

Deploy the Code

1. Create a new AWS Lambda function and select Author from scratch.
2. Click on the Lambda function to edit the details:

• Code entry type: Upload a .ZIP file
• Upload our LogDNA Lambda function .ZIP File.
• Handler: index.handler
• Minimum Runtime Version: Node.js.20.x

Configuration

General Configuration

If this function is being used to stream from gzipped files:

1. Set Timeout to, at least, 30 seconds.
2. Set Memory limit to, at least, 512 MB.

Notes:

• The recommended number of retries is 0 because retrying lambda execution can result in duplicate logs. It can be modified in Configuration > Asynchronous invocation.
• Timeout and Memory limit might need to be increased if the file size is too big.

Triggers

Add S3 as a trigger with the following configuration:

• Specify the bucket you want to stream from.
• Specify the event types you want to capture.
• Optional prefix and suffix options are related to object paths within the specified bucket.

Notes:

• This S3 Lambda function and S3 Bucket must be in the same availability zone.
• You can specify a bucket in only one trigger and/or S3 Lambda function because a bucket accepts only one subscription but one S3 Lambda function can stream from multiple buckets at the same time.

Permissions

For Execution role, assign a role that has the following policies:

• AmazonS3ReadOnlyAccess
• AWSLambdaBasicExecutionRole

Environment Variables

Set INGESTION_KEY variable to your LogDNA ingestion key.

Notes:

• For more information about required and optional environment variables, please, check out this.

Monitoring

Enabling monitoring means forwarding the metrics and logs about the execution of the S3 Lambda function to CloudWatch. You can also use logdna-cloudwatch to monitor the performance of this S3 Lambda function.

Test

You can test the configuration and code package using the following test input containing the bucket name and the path to the file you want to test the lambda on:

{
  "Records": [
    {
      "s3": {
        "bucket": {
          "name": "<bucket-name>"
        },
        "object": {
          "key": "<object-path>"
        }
      }
    }
  ]
}

Guide for Migrating from v1 to v2

If you have been using v1 and want to switch to using the newer versions, check out this guide

License

Copyright © LogDNA, released under an MIT license. See the LICENSE file and https://opensource.org/licenses/MIT

Contributing

Contributions are always welcome. See the contributing guide to learn how you can help.

Happy Logging!