Hashicorp Configuration Language: Difference between revisions
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=Input Variable= | =Input Variable= | ||
<syntaxhighlight lang='text'> | |||
variable "region" { | |||
default = "us-east-1" | |||
} | |||
</syntaxhighlight> | |||
To use the variable: | |||
<syntaxhighlight lang='text'> | |||
region= var.region | |||
</syntaxhighlight> | |||
This is also an expression interpolation, prefixed with “var.” | |||
Variables can be assigned in multiples way, and this is the descending order of precedence: | |||
• command-line flags (-var = ‘region=something’) | |||
• from a file (.tfvars, -var-file=…) terraform.tfvars or *.auto.tfvars in the current directory are automatically loaded. Multiple -var-file can be used. | |||
• From environment variables: TF_VAR_name. This can only be used for string variables. | |||
• UI Input | |||
• Variable defaults (“default” keyword). | |||
Lists | |||
https://learn.hashicorp.com/terraform/getting-started/variables#lists | |||
Maps | |||
https://learn.hashicorp.com/terraform/getting-started/variables#maps | |||
=Output Variable= | =Output Variable= | ||
Revision as of 23:07, 13 November 2019
External
Internal
Overview
Block
Interpolation Expression
Input Variable
variable "region" {
default = "us-east-1"
}
To use the variable:
region= var.region
This is also an expression interpolation, prefixed with “var.”
Variables can be assigned in multiples way, and this is the descending order of precedence: • command-line flags (-var = ‘region=something’) • from a file (.tfvars, -var-file=…) terraform.tfvars or *.auto.tfvars in the current directory are automatically loaded. Multiple -var-file can be used. • From environment variables: TF_VAR_name. This can only be used for string variables. • UI Input • Variable defaults (“default” keyword).
Lists
https://learn.hashicorp.com/terraform/getting-started/variables#lists
Maps
https://learn.hashicorp.com/terraform/getting-started/variables#maps