Consume updated TaskResponse in network fault injection handlers

[mye956]

Summary

This PR will consume the TaskResponse changes that were introduced in #4285 and #4273 within the shared fault injection handlers. We will also be validating that the obtained task metadata for the corresponding incoming request for the following:

• Is the task FaultInjectionEnabled ?
• Using either host or awsvpc network mode
• Does not have any null/empty values

Implementation details

• ecs-agent/tmds/handlers/fault/v1/handlers/handlers.go
  • Modified getTaskMetadataForFault to validate the obtained task metadata from GetTaskMetadata if it satisfy the 3 checks above
• agent/api/task/task.go
  • Added new fields NetworkNamespace and FaultInjectionEnabled with corresponding getter methods. (Note: There will be a follow up PR to initialize/set these fields)
• agent/handlers/v4/tmdsstate.go
  • Modified getTaskMetadata to initialize FaultInjectionEnabled and a TaskNetworkConfig for the TaskResponse object to be returned if the corresponding FaultInjectionEnabled field of the Task struct is true

Testing

• Added new test cases to ecs-agent/tmds/handlers/fault/v1/handlers/handlers_test.go for all three network fault injection handlers if:
  • FaultInjectionEnabled of TaskResponse is set to false
  • TaskNetworkConfigof TaskResponse is empty
  • NetworkMode of TaskNetworkConfig is set to an invalid value
• Added new test cases to agent/handlers/task_server_setup_test.go for all three network fault injection if:
  • FaultInjectionEnabled of Task is set to false
  • NetworkMode of Task is set to an invalid value

New tests cover the changes: Yes

Description for the changelog

• Feature: Consume updated TaskResponse changes to network fault injection handlers

Additional Information

Does this PR include breaking model changes? If so, Have you added transformation functions?

Does this PR include the addition of new environment variables in the README?

Licensing

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.