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* Remove lots of refs to iron and funcy oracle etc.. * more ref replacements * Replacing more refs. Treeder * Use Fn not FN
58 lines
2.4 KiB
Markdown
58 lines
2.4 KiB
Markdown
# OUT OF DATE - NEEDS TO BE UPDATED
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Import existing AWS Lambda functions
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====================================
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The [fn](https://github.com/fnproject/fn/) tool includes a set of
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commands to act on Lambda functions. Most of these are described in
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[getting-started](./getting-started.md). One more subcommand is `aws-import`.
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If you have an existing AWS Lambda function, you can use this command to
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automatically convert it to a Docker image that is ready to be deployed on
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other platforms.
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### Credentials
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To use this, either have your AWS access key and secret key set in config
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files, or in environment variables. In addition, you'll want to set a default
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region. You can use the `aws` tool to set this up. Full instructions are in the
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[AWS documentation][awscli].
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[awscli]: http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html#cli-config-files
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### Importing
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The aws-import command is constructed as follows:
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```bash
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fn lambda aws-import <arn> <region> <image>
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```
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* arn: describes the ARN formats which uniquely identify the AWS lambda resource
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* region: region on which the lambda is hosted
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* image: the name of the created docker image which should have the format <username>/<image-name>
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Assuming you have a lambda with the following arn `arn:aws:lambda:us-west-2:123141564251:function:my-function`, the following command:
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```sh
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fn lambda aws-import arn:aws:lambda:us-west-2:123141564251:function:my-function us-east-1 user/my-function
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```
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will import the function code from the region `us-east-1` to a directory called `./user/my-function`. Inside the directory you will find the `function.yml`, `Dockerfile`, and all the files needed for running the function.
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Using Lambda with Docker Hub and Fn requires that the Docker image be
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named `<Docker Hub username>/<image name>`. This is used to uniquely identify
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images on Docker Hub. Please use the `<Docker Hub username>/<image
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name>` as the image name with `aws-import` to create a correctly named image.
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If you only want to download the code, pass the `--download-only` flag. The
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`--profile` flag is available similar to the `aws` tool to help
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you tweak the settings on a command level. Finally, you can import a different version of your lambda function than the latest one
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by passing `--version <version>.`
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You can then deploy the imported lambda as follows:
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```
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./fn deploy --app myapp
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````
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Now the function can be reached via ```http://$HOSTNAME/r/user/my-function```
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