Why does Terraform show environment variables discrepancies during app or job creation?

When you create an app or job with Terraform, and then rerun the terraform apply or terraform plan commands without changing your .tf file, you see changes related to environment variables.

When a Code Engine app or job is created, the service creates some default environment variables:

• For apps: CE_SUBDOMAIN, CE_APP, CE_REGION, CE_DOMAIN, CE_API_BASE_URL, and CE_PROJECT_ID
• For jobs: CE_REGION, CE_API_BASE_URL, and CE_PROJECT_ID

For more information about additional environment variables, see Automatically injected environment variables.

When you rerun the terraform apply or terraform plan, Terraform sees these default environment variables in your existing app or job as discrepancies because they are not listed in your .tf file.

Edit your .tf file to include the default run_env_variables entries for Code Engine resources. For example, if you are working with an app, you can edit as follows:

data "ibm_code_engine_project" "my-project" {
  project_id = var.ibmcloud_code_engine_project_id
}

resource "ibm_code_engine_app" "my-app-instance" {
  project_id      = data.ibm_code_engine_project.my-project.project_id
  name            = "my-app"
  image_reference = "icr.io/codeengine/helloworld"

  run_env_variables {
    name  = "CE_SUBDOMAIN"
    type  = "literal"
    value = "-"
  }
  run_env_variables {
    name  = "CE_APP"
    type  = "literal"
    value = "my-app"
  }
  run_env_variables {
    name  = "CE_REGION"
    type  = "literal"
    value = var.ibmcloud_region
  }
  run_env_variables {
    name  = "CE_DOMAIN"
    type  = "literal"
    value = "${var.ibmcloud_region}.codeengine.appdomain.cloud"
  }
  run_env_variables {
    name  = "CE_PROJECT_ID"
    type  = "literal"
    value = data.ibm_code_engine_project.my-project.project_id
  }
  run_env_variables {
    name  = "CE_API_BASE_URL"
    type  = "literal"
    value = "https://api.${var.ibmcloud_region}.codeengine.cloud.ibm.com"
  }
}