In a nutshell, Packer’s role is to build a cloud server image that can be deployed immediately.
Download address is: the Downloads | Packer by HashiCorp
Cloud host is one of the most frequently used cloud products. As the number of cloud hosts increases, how to ensure the consistency of versioning deployment on cloud hosts becomes a common problem for users. In the current situation, users need to manually connect hosts or use scripts before deploying and installing hosts. The complex operation process and strict environment requirements make it difficult to ensure consistency and availability.
To address such issues, UCloud was developed and adopted by the official repository of Packer, an automated build image tool. By using Packer to create custom images, the deployment time can be reduced and reliability can be improved, which improves users’ ability to automate deployment. Hashicorp has officially released version 1.7.2, which includes UCloud Packer Builder.
Packer and Docker
When it comes to building images, many people might ask how this is different from Docker. Are used to build mirrors.
Packer is arguably more system-level, building the operating system and all the applications on top of it.
Docker is a container, you need to install container management in the current operating system, and then use container management to download images from a remote container repository.
In Docker, you need to install the operating system yourself, and install containers in the operating system.
Packer will help you install the operating system, for example, you now have a running server on EC2, you want to extend this server. The usual operation is to build the server as an image, then take the image of the server and deploy an EC2.
Packer’s role is to help you create this image.
www.ossez.com/t/packer/13…