consul_key Function

Consul keys can be used within your template using the consul_key function.

You can either use this function in a locals block or directly inline where you want to use the value.

locals {  my_version = "${consul_key("myservice/version")}"} source "null" "first-example" {  communicator = "none"} build {  name = "my-build-name"  sources = ["null.first-example"]   provisioner "shell-local" {    environment_vars = ["TESTVAR=${build.PackerRunUUID}"]    inline = ["echo my_version is '${local.my_version}'",              "echo version is '${consul_key("myservice/version")}'."]  }}

This will load the key stored at the path myservice/version from consul.

The configuration for consul (address, tokens, ...) must be specified as environment variables, as specified in the Documentation.