2 min read | by Jordi Prats
To be able to save data generated using terraform to be able to import the terraform state somewhere else using terraform_remote_state or retrieving it using the CLI we need to use the output directive:
output "alb_dns_name" { description = "ALB DNS name" value = aws_alb.jenkins-alb.dns_name } We can use terraform output for getting all the outputs:
$ terraform output web web = "jenkins.pet2cattle.com" helm_jenkins_values = tolist([ <<-EOT image: repository: jenkins tag: 2.60.3 pullPolicy: IfNotPresent pullSecrets: [] lts: true (...) EOT, ]) We can also retrieve just one of then, for example:
$ terraform output web "jenkins.pet2cattle.com" We can also use the -raw option for getting just the data:
$ terraform output -raw web jenkins.pet2cattle.com We can also output complex types, for example the compounded values from values and set attributes of a helm_release* resource:
output helm_jenkins_values { value = helm_release.jenkins.values } If we try to retrieve it we will get the following output:
$ terraform output helm_jenkins_values tolist([ <<-EOT image: repository: jenkins tag: 2.60.3 pullPolicy: IfNotPresent pullSecrets: [] lts: true (...) EOT, ]) But we won't be able to retrieve it as a raw value since it is a complex type:
$ terraform output -raw helm_jenkins_values Error: Unsupported value for raw output The -raw option only supports strings, numbers, and boolean values, but output value "helm_jenkins_values" is list of string. Use the -json option for machine-readable representations of output values that have complex types. To be able to retrieve it as a yaml, we will need to tell terraform to output it as a json and then use jq for rendering the data contained in the first item of the array:
$ terraform output -json helm_jenkins_values | jq -r .[0] image: repository: jenkins tag: 2.60.3 pullPolicy: IfNotPresent pullSecrets: [] lts: true nameOverride: "" fullnameOverride: "" (...) Posted on 16/04/2021