2.0.1 • Public • Published

    Serverless Prune Plugin

    Following deployment, the Serverless Framework does not purge previous versions of functions from AWS, so the number of deployed versions can grow out of hand rather quickly. This plugin allows pruning of all but the most recent version(s) of managed functions from AWS. This plugin is compatible with Serverless 1.x and higher.

    Serverless Coverage Status


    Install with npm:

    npm install --save-dev serverless-prune-plugin

    And then add the plugin to your serverless.yml file:

      - serverless-prune-plugin

    Alternatively, install with the Serverless plugin command (Serverless Framework 1.22 or higher):

    sls plugin install -n serverless-prune-plugin


    In the project root, run:

    sls prune -n <number of version to keep>

    This will delete all but the n-most recent versions of each function deployed. Versions referenced by an alias are automatically preserved.

    Single Function

    A single function can be targeted for cleanup:

    sls prune -n <number of version to keep> -f helloWorld


    The previous usage examples prune the default stage in the default region. Use --stage and --region to specify:

    sls prune -n <number of version to keep> --stage production --region eu-central-1

    Automatic Pruning

    This plugin can also be configured to run automatically, following a deployment. Configuration of automatic pruning is within the custom property of serverless.yml. For example:

        automatic: true
        number: 3

    To run automatically, the automatic property of prune must be set to true and the number of versions to keep must be specified. It is possible to set number to 0. In this case, the plugin will delete all the function versions (except $LATEST); this is useful when disabling function versioning for an already-deployed stack.


    This plugin can also prune Lambda Layers in the same manner that it prunes functions. You can specify a Lambda Layer, or add the flag, includeLayers:

        automatic: true
        includeLayers: true
        number: 3

    Dry Run

    A dry-run will preview the deletion candidates, without actually performing the pruning operations:

    sls prune -n <number of version to keep> --dryRun

    Additional Help


    sls prune --help

    Permissions Required

    To run this plugin, the user will need to be allowed the following permissions in AWS:

    • lambda:listAliases
    • lambda:listVersionsByFunction
    • lambda:deleteFunction
    • lambda:listLayerVersions
    • lambda:deleteLayerVersion

    Common Questions

    How do I set up different pruning configurations per region/stage?

    Several suggestions are available in this thread.

    Can I just disable versioning entirely?

    Absolutely. While Serverless Framework has it enabled by default, versioning can be disabled.


    Copyright (c) 2017 Clay Gregory. See the included LICENSE for rights and limitations under the terms of the MIT license.


    npm i serverless-prune-plugin

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