From their README:Ī sandboxed local environment that replicates the live AWS Lambda environment almost identically – including installed software and libraries, file structure and permissions, environment variables, context objects and behaviors Emulating the Lambda environment with LambCI and Dockerĭocker-lambda is an emulated Lambda environment that will allow us to create and compile packages for later deployment to AWS Lambda. This means we need to find a way to package and compile dependencies ahead of time in an environment that is compatible with the Lambda environment. Lambda has no way to execute a command inside the environment before the code is loaded. onto a running machine, before generating an AMI, or inside a Docker container.
#Aws postgresql lambda 2018 install
In a production or pre-production environment, that would mean running bundle install on the target machine after copying the code into it, e.g.
The way to accommodate different development and production environments is to run bundle install in each of them. bundle config build.pg -with-pg-config=/usr/pgsql-10/bin/pg_config). Bundler will also need to know where to find these dependencies. On Linux these might be the postgresql-devel and "Development Tools" libraries. Your development environment is likely different to the one in production and the magic that Bundler does behind the scenes when running bundle install will be different when relying on having the correct headers, binaries and build tools for any dependencies in each environment.įor example, on my Mac I need Xcode, Homebrew and PostgreSQL installed in order to install the pg gem. Bundlerīundler is the primary dependency management system for Ruby 2. For Ruby, this includes gems, binaries and other assets. The Lambda operating model requires that a Lambda function is deployed as a standalone package that contains all dependencies in a single.
#Aws postgresql lambda 2018 how to
It however doesn’t address how to use RubyGems that have dependencies outside of Ruby. The AWS blog post Announcing Ruby Support for AWS Lambda blog post does an excellent job of describing how to get up and running quickly, and also includes an example on how to use RubyGems dependencies when deploying your Lambda functions. This post describes how Bundler should be configured for Lambda and how to ensure binary dependencies are available for gems such as pg and nokogiri. Running Ruby-based Lambda functions with binary dependencies can be a bit tricky because AWS Lambda expects the packages with a specific structure, and because included binaries must be built and packaged to work for the Lambda operating environment.
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