Packer variables in script. You cannot change the value of an input .

Packer variables in script Input variables let you customize aspects of a build without altering the build's own source code. Packer Workflow Installing Packer Understanding Packer HCL template. 13. 1. You can also declare individually using the var option. auto. The `shell-local` Packer provisioner runs shell scripts on the machine where Packer is running. pkr file, or any other file name if referenced when executing the build. Treat Packer variables as constants — you cannot update them during run time. You cannot change the value of an input Jul 22, 2023 · Windows VM: Passing HCL variables to PowerShell script that has required parameters I am trying to pass variable values to a Packer script. Input variables are parameters for Packer modules. This can help you quickly learn about a template without having to dive into the JSON itself. The basic building blocks of Packer. Learn how to use the provisioner with WinRM and SSH communicators. Learn how to use the input variable syntax for Packer templates written in HCL. Use the `shell` provisioner to install and configure software on a machine. You can override the values of input variables at run time using command line Jan 23, 2023 · Environment variables: Variables can also be set as environment variables, which Packer will automatically detect and use. I need that script to do the following: Get a Windows AVD image from the Azur… The `powershell` Packer provisioner runs PowerShell scripts on Windows machines. The command will tell you things like what variables a template accepts, the builders it defines, the provisioners it defines and the order they'll run, and more. hcl file or . The question is - is it possible to use a variable/local value of a valie of some other variable in packer variables file? Jun 8, 2018 · The packer inspect command takes a template and outputs the various components a template defines. hcl, the default . g. Packer Tutorial For Beginners In this Packer beginner tutorial, you will learn the following. puppet, salt, Packer templates can be parameterized using variables. This can be useful for setting variables in a script or CI/CD pipeline. Oct 18, 2017 · You aren't referencing those defined variables elsewhere in your config -- in your shell provisioner you're trying to access the env variables again instead of using the user variables that you defined at the top of your config from the env variables. Variable blocks declare the variable name (ami_prefix), the data type (string), and the default value (learn-packer-linux-aws-redis). Local variables can be a compound of input variables and local variables. Variable blocks declare the variable name (docker_image), the data type (string), and the default value (ubuntu:jammy). In this tutorial, we will explain all different ways you can pass variables in to your Packer template. Packer templates can be parameterized using variables. I can see that using variables is not possible this way. In your Packer May 27, 2020 · The use of environment variables with HCL can be a little tricky because they are referenced differently from what they are named. Input variables, sometimes referred to as variables or Packer variables, are the parameters for a Packer build. While the variable type and default values are optional, we recommend you define these attributes when creating new variables. I have tried various options but no joy. Here's one thing I've tried: variable "system_name" { type = string } s. The `shell` Packer provisioner runs shell scripts on the machine Packer builds. sh should accept input parameter which I send during packer build. Oct 13, 2022 · There are different ways in which you can pass variables into Packer template. Which is why they're blank. Variables HashiCorp Packer can use variables to define defaults during a build Variables can be declared in a . Command-line Templates Variable files Oct 12, 2021 · Lib_url = "https://lib-name-${version}` Where version comes from other packer variables file. This command is extra useful when used Jul 17, 2025 · I'm completely unable to use environment variables in Packer HCL v1. This page introduces input variables and local variables as a way to parameterize a configuration. Once defined, input variables are settable from a default value, environment, special var files, and command line arguments. Packer injects some environmental variables by default into the environment, as well, which are covered in the section below. More specifically, the PKR_VAR prefix is needed to tell Packer that it is an environment variable it should know about, but when you reference the variable you have to drop the PKR_VAR prefix. Objective is my provision. None of the documented methods work. Aug 17, 2017 · The easiest way should be to set a user variable from the build command and pass this variables from packer to the shell provisioner script which detects the value of the user variable and calls the appropriate provisioner script e. Defining Variables and locals In the legacy JSON Packer templates, any variables we hadn't already Dec 1, 2017 · 23 I am struggling to pass input parameter to packer provisioning script. Consul and Vault: Variables can be stored in HashiCorp Consul or Vault and passed to Packer using the -var option. Like Matt said above, if you change the variables inside the provisioner to use user variables, you should be okay. pkrvars. packer build -var role=abc test. Some input variables have default values that you can override using command line options, environment variables, or variable definitions files. Jan 5, 2023 · Even the packer template development or update should go through all the CI tests before getting deployed in a project environment. Learn how to use the `shell-local` provisioner to run a shell script on your build server, desktop, or other local machine. execute_command (string) - The command to use to execute the script. json I am able to get the user variable in json file however I am unable to pass it provision script. cll prbnze gyswxxkq hvl pakufmou nyjbe vikzq typk ivwyw rlk isg zhtntw dbrwtn fcov tlzwvgf