»The `locals` block

Note: This page is about HCL2 Packer templates. HCL2 templates were first introduced as a beta feature into Packer version 1.5. As of v1.7, HCL2 support is no longer in beta, and is the preferred way to write Packer configuration. For the old-style stable configuration language see template docs. As of v1.6.2, you can convert your legacy JSON template into an HCL2 config file using the hcl2_upgrade command.

The locals block, also called the local-variable block, defines locals within your Packer configuration.

# locals.pkr.hcl
locals {
    # locals can be bare values like:
    wee = local.baz
    # locals can also be set with other variables :
    baz = "Foo is '${var.foo}' but not '${local.wee}'"
}

# Use the singular local block if you need to mark a local as sensitive
local "mylocal" {
  expression = "${var.secret_api_key}"
  sensitive  = true
}

# locals.pkr.hcl
locals {
    # locals can be bare values like:
    wee = local.baz
    # locals can also be set with other variables :
    baz = "Foo is '${var.foo}' but not '${local.wee}'"
}

# Use the singular local block if you need to mark a local as sensitive
local "mylocal" {
  expression = "${var.secret_api_key}"
  sensitive  = true
}

»More on variables

Read the full locals description for a more thorough read.
Read the variables guide for more examples.

»The locals block

»More on variables

»The `locals` block