Packer is a tool for creating machine and container images for multiple platforms from a single source configuration. A Packer template consists of various sections, but the builders section is mandatory.
builders: This section defines the builders that Packer will use to create the machine images. It specifies the platform, source image, and configuration required to build the final image.
The other sections are optional but can be included for more complex configurations:
A. images: Not a standard section in Packer templates.
B. provisioners: Optional section used for provisioning the image after it is built.
D. variables: Optional section for defining variables to be used in the template.
E. post-processors: Optional section for defining actions to be taken after the image is built.
References:
Packer Documentation - Template
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