terraform apply and plan is broken with carriage return in opsworks custom.json template file

[ole-flaregames]

Hi there,

found a pretty strange issue. It seems like a carriage return at the bottom of a template.json are "compared / diffed / parsed" in a wrong way with the actually applied state within opsworks.
It seems only to afffect version 0.7.5

Terraform Version

0.7.5

Affected Resource(s)

• aws_opsworks_stack

  Terraform Configuration Files

  Attached as file

1) opsworks-create-stack.tf includes the data "template_file" + the module that is used for creating an opsworks stack

2) config_stack.json is the template file itself that is rendered

Expected Behavior

As there are no changes within the custom.json - terraform should not try to apply or suggest any changes that are related to the custom.json during plan or apply.

Actual Behavior

terraform plan suggests changes , terraform apply - really applies changes although there are none - Actually if you apply the changes for the custom.json they are the same in Opsworks as before.

Steps to Reproduce

1)

• create a opsworks stack with a custom.json
• the template file includes a carriage return at the end of the template.json

2)

• apply initially
• the next plan or apply will show changes , but actually there are none

What i suspect to be a cause of the problem:
It seems like the carriage return "/n" within the template is deleted by the Opsworks API.
A strong indication for this issue is, that terraform plan or terraform applyshow in their change list an additional "/n" after the whole custom.json block.

If you delete the carriage return (bottom line) within the template file, the issue seems to be fixed.

Additional information:
Usage of S3 remote state files.

Cheers
Ole

opsworks-create-stack.tf.txt
config_stack.json.txt

[hydroxide]

I am having the same issue, with the very same setup (custom_json as a template file, S3 remote state file). Because I would like to trigger null_resources on the custom_json, this is more than just an inconvenience.

[ole-flaregames]

After doing some quick tests, it seems like 0.7.6 is affected as well.

[hydroxide]

A workaround is to use the trimspace interpolation function on the template.

[timvisher]

0.7.10 is still affected.

[maemichi-monosense]

0.9.5 is still affected…

[hashibot[bot]]

I'm going to lock this issue because it has been closed for _30 days_ ⏳. This helps our maintainers find and focus on the active issues.

If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.