Languages (Environment)

Tutorial for supported language

Environment Interface Version

Currently, Fission support three environment interface version: v1, v2 and v3.

  • v1
    • Support loading function from a single file. (Mainly for interpreted languages like Python and JavaScript.)
    • You are NOT allowed to specify which entrypoint to load in if there are multiple entrypoint in the file.

  • v2 (Recommend)
    • The function code can be placed in a directory or having multiple entry points in a single file.
    • Load function by specific entry point. (For the v2 interface, the function may not work if no entry point is provided.)
    • Support downloading necessary dependencies and source code compilation. (Optional)

  • v3 (Recommend)
    • All features in v2 interface.
    • Pre-warmed pool size adjustment.

Which Interface Version Should I Choose

If all source code and dependencies can be put into a single and non-compiled file, v1 interface would be enough.

If the function requires third party dependencies during the runtime or the function is written in compiled language, you should choose v2 interface in order to load function from a directory/binary with specific entry point.

If you want to adjust size of environment pre-warmed pool, use v3.

Using Specific Environment Interface Version

  # add version option to fission environment create command

For example, to create a go env with version 3 environment interface.

   fission environment create --name go --image fission/go-env-1.13 --builder fission/go-builder-1.13  --version 3

Supported language images

The following pre-built environments are currently available for use in Fission:

Environment Image Builder Image v1 v2 v3
NodeJS fission/node-env fission/node-builder O O O
Python 3 fission/python-env fission/python-builder O O O
Go see here for more info O O O
JVM (Java) fission/jvm-env fission/jvm-builder O O O
Ruby fission/ruby-env fission/ruby-builder O O O
Binary (for executables or scripts) fission/binary-env fission/binary-builder O O O
PHP 7 fission/php-env fission/php-builder O O O
.NET 2.0 fission/dotnet20-env fission/dotnet20-builder O O O
.NET fission/dotnet-env - O X X
Perl fission/perl-env - O X X
You can find the latest image tags by searching image name at Fission Dockerhub.

Go Functions

Writing Go functions with fission

Java Functions

Writing Java functions with fission

Node.js Functions

Writing Node.js functions with fission

Python3 Functions

Writing Python functions with fission