Creating executables

Add a function definition

Step 1: Write the function and compress it

    cd examples/hello_world_function    zip -g hello_world.zip main.py

Step 2: Upload the function definition to SWEEP

    response = sweep_client.upload_function_def(        function_def_file='examples/hello_world_function/fdef_hello_world.json',        function_code_file='examples/hello_world_function/hello_world.zip',        user = user)
    > {'status': 'OK', 'msg': 'Successfully uploaded function hello_world.'}

Add a container definition

Step 1: Create a docker image and compress it

hello_world.zip contains files for creating a simple docker image that prints 'hello world'.

This script

cd hello_worlddocker build --tag hello_world .docker run hello_world; echo $?docker save -o hello_world.tar hello_world:latest

contains commands to build the image, run it locally and display its exit code, and compress it to a tar archive. Please save this script as docker_cmds_hello_world.sh and run

$ ./docker_cmds_hello_world.sh
> Sending build context to Docker daemon  3.072kB    .    .    .> Successfully built 832c75e88988> Successfully tagged hello_world:latest> Hello world!> 0

danger

If you are using the SWEEP UI, you must still follow the above steps in creating the tar file using Docker. DO NOT use a zip file and DO NOT use 7-Zip to create the tar file.

Step 2: Upload the container definition to SWEEP

A container definition for the hello world image is:

{  "id" : "cdef_hello_world",  "destination_id" : "dest1",  "image_name": "hello_world",  "image_tag": "latest",  "cpu" : "0.25",  "memory" : "512"}

Please save this JSON as _container_def_hello_world.json.

Use the SWEEP-API to upload the container definition:

    container_def_file = 'examples/hello_world_container/_container_def_hello_world.json'    response = sweep_client.upload_container_def(        container_def_file='examples/hello_world_container/cdef_hello_world.json',        container_code_file='examples/hello_world_container/hello_world.tar',        user = user)
    print(response)    > {'status': 'OK', 'msg': 'Started uploading image.'}

Make sure the images you push are such that they return the exit code 0 if they run successfully This is standard behaviour, but you can check the exit code of a container locally by running your image and printing the environment variable ?, which contains the exit code of the latest run command.

docker run my_image; echo $?