github.com/iron-io/functions@v0.0.0-20180820112432-d59d7d1c40b2/docs/lambda/create.md (about)

     1  # Creating Docker images out of Lambda functions
     2  Docker images created by running the `create-function` subcommand on a Lambda function are ready to execute.
     3  
     4  You can convert any Lambda function of type nodejs 0.10, python 2.7 and Java 8 into an
     5  IronFunction compatible Docker Image as follows:
     6  ```bash
     7  fn lambda create-function <name> <runtime> <handler> <files...>
     8  ```
     9  
    10  * name: the name of the created docker image which should have the format `<username>/<image-name>`
    11  * runtime: any of the following `nodejs`, `python2.7` or `java8`
    12  * handler: a handler takes a different form per runtime
    13      * java8: `<namespace>.<class>::<handler>`
    14      * python2.7:  `<filename>.<handler>`
    15      * nodejs: `<filename>.<handler>`
    16  * file: the files to be converted, however for java8 only one file of type `jar` is allowed.
    17  
    18  e.g:
    19  ```bash
    20  fn lambda create-function irontest/node-exec:1 nodejs node_exec.handler node_exec.js
    21  ```
    22