Use EnvironmentFile instead of Environment

[rariyama]

Overview

fix #1749

I made a change that environment file is used when passing the values of environment to the container instead of environment, that is the way to add them to the container one by one.
This change will be effective to avoid failing an execution of ECS Run Task because a maximum size of characters of ECS container overrides is 8192 and this limit includes environments defined by the current implementation.
it will be helpful especially when executing sh>: operator. In addition to variables defined in _env, variables defined in _export are also passed to the container unlike py>: and rb>: so the size of environment tends to be larger as the development progresses.

The change points

• to upgrade awsJavaSdkVersion
  • it needs to use EnvironmentFiles
• to use withEnvironmentFiles instead of withEnvironment

[rariyama]

I added the parameter for choosing the existing way in this commit 27d1ae3.
Users can select the either way for passing environments to a container by setting it. The default value is false, so there will be no impact for existing users.
If some users want to use environment file on most of tasks in workflow, they can use it easily by setting the parameter on the root task and override it on child ones as necessary.

[yoyama]

Sorry for very late reply.
I don't check it in detail, but I have a few concerns.

• I think providing an option to use file to pass environment variables is good and default is false is also good.
  But I think it is better to be configured by server properties because it is internal behavior.
• Your change increases the code line of the method. I hope refactoring on your change.

[rariyama]

@yoyama
Thanks for your reply.

I think providing an option to use file to pass environment variables is good and default is false is also good.
But I think it is better to be configured by server properties because it is internal behavior.

It makes sense to me, so I modified my implementation with this commit fe6f8bf. I left setEcsContainerOverrideEnvironment and added a process about using environmentFiles to it.

Your change increases the code line of the method. I hope refactoring on your change.

I also dealt with this concern with the commit above. I extracted a process about uploading environmentFile to S3 as another method from setEcsContainerOverrideEnvironment.

If there are any other concerns, please let me know about those.

[szyn]

Sorry for the late reply.
I agree with adding ecs.<name>.use_environment_file to the system property. Actually, this property can also be set from the task config, but since the default is false and does not affect the behavior, it should be fine.

I have left some minor comments, I would appreciate it if you take a look at them when you get a chance.

[rariyama]

@szyn
Thanks for your review. I fixed the problems you commented so please confirm it when you are available.

[szyn]

Looks good to me. Thank you for your contribution.