HashiCorp Packer – is lightweight runs on every major operating system and is highly performant creating machine images for multiple platforms this tool that can help to create identical machine images for multiple platforms from a single source configuration and this reduces overhead on the DevOps team who manages multi-platform deployments (ex hybrid cloud) and wants consistency across machine images the idea behind Immutable Infrastructure takes birth from the fact that you do not change existing infrastructure in case of any update or change but deploy completely new servers with the changes pre-installed
