Description

As discussed here, it changes the container proxy to provide an environment at init time (/init).

But I couldn't move the entire context from /run to /init to maintain backward compatibility.

1. /init

Put environment variables in the env field. and runtimes can use this value.

{
  "value": {
    "name" : String,
    "main" : String,
    "code" : String,
    "binary": Boolean,
    "env": Map[String, String] = {
       "__OW_NAMESPACE",
       "__OW_ACTION_NAME",
       "__OW_ACTIVATION_ID",
       "__OW_TRANSACTION_ID",
       "__OW_DEADLINE"
    }
  }
}

2. /run

The namespace, action_name, activation_id, transaction_id, and deadline fields are uppercased and prefixed with "__OW_" by runtimes [1].

• namespace -> __OW_NAMESPACE
• action_name -> __OW_ACTION_NAME

I think these fields cannot be removed due to backward compatibility.

This is a draft pull request, please let me know if there is a better way.

ref

[1] https://github.com/apache/openwhisk/blob/master/docs/actions-actionloop.md#what-the-launcher-needs-to-do

Related issue and scope

https://lists.apache.org/thread.html/ef18f833671a3266d4cde3bf4eaff379596d03b3e147a785a9b06941@%3Cdev.openwhisk.apache.org%3E

My changes affect the following components

• API
• Invoker
• Tests
• Documentation

Types of changes

• Enhancement or new feature (adds new functionality).
• Breaking change (a bug fix or enhancement which changes existing behavior).

Checklist:

• I signed an Apache CLA.
• I reviewed the style guides and followed the recommendations (Travis CI will check :).
• I added tests to cover my changes.
• My changes require further changes to the documentation.
• I updated the documentation where necessary.