Amazon S3
  • 29 Jan 2024
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Amazon S3

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Article Summary

Output events and detections to an Amazon S3 bucket.

If you have your own visualization stack, or you just need the data archived, you can output directly to Amazon S3. This way you don't need any infrastructure.

  • bucket: the path to the AWS S3 bucket.
  • key_id: the id of the AWS auth key.
  • secret_key: the AWS secret key to auth with.
  • sec_per_file: the number of seconds after which a file is cut and uploaded.
  • is_compression: if set to "true", data will be gzipped before upload.
  • is_indexing: if set to "true", data is uploaded in a way that makes it searchable.
  • region_name: the region name of the bucket, it is recommended to set it, though not always required.
  • endpoint_url: optionally specify a custom endpoint URL, usually used with region_name to output to S3-compatible 3rd party services.
  • dir: the directory prefix
  • is_no_sharding: do not add a shard directory at the root of the files generated.


bucket: my-bucket-name
secret_key: fonsjifnidn8anf4fh74y3yr34gf3hrhgh8er
is_indexing: "true"
is_compression: "true"

Screenshot 2024-01-29 at 5.39.59 PM.png

If the is_indexing option is enabled, data uploaded to S3 will be in a specific format enabling some indexed queries.

LC data files begin with a d, while special manifest files (indicating
which data files contain which sensors' data) begin with an m. Otherwise (not is_indexing), data is uploaded as flat files with a UUID name.

The is_compression flag, if on, will compress each file as a GZIP when uploaded. It is recommended you enable is_compression.

AWS IAM Configuration

  1. Log in to AWS console and go to the IAM service.
  2. Click on Users from the menu.
  3. Click Create User, give it a name, and click Next.
  4. Click Next, then Create User
  5. Click on the user you just created and click on the Security Credentials tab
  6. Click Create access key
  7. Select Other and click Next
  8. Provide a description (optional) and click Create access key
  9. Take note of the "Access key", "Secret access key" and ARN name for the user (starts with "arn:", shown on the user summary screen).

AWS S3 Configuration

  1. Go to the S3 service.
  2. Click Create bucket, enter a name and select a region.
  3. Click Create bucket
  4. Click on your newly created bucket and click on the Permissions tab
  5. Select Bucket policy and click Edit
  6. Input the policy in sample below where you replace the <<USER_ARN>> with the ARN name of the user you created and the <<BUCKET_NAME>> with the name of the bucket you just created.
  7. Click Save Changes

Policy Sample

   "Version": "2012-10-17",
   "Statement": [
         "Sid": "PermissionForObjectOperations",
         "Effect": "Allow",
         "Principal": {
            "AWS": "<<USER_ARN>>"
         "Action": "s3:PutObject",
         "Resource": "arn:aws:s3:::<<BUCKET_NAME>>/*"

LimaCharlie Configuration

  1. Back in the LimaCharlie GUI, in your organization view, click Outputs and Add Output
  2. Select the stream you would like to send (events, detections, etc)
  3. Select the Amazon S3 destination
  4. Give it a name, enter the bucket name, key_id, and secret_key you noted from AWS, and any other parameters you wish to configure
  5. Click Save Output
  6. After a minute, the data should start getting written to your bucket

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