A Introduction of Packer

Let Packer Simplify your work— It’s all about DevOps

Packer

Content

•Why Packer created

•How to use Packer

•What are typical application scenarios of Packer

“I want a server”“OK☺”

Set up machine & network.. 2 hour Install operation system.. 30 min Install software.. N hour Configuring & deploying.. N hour

About 10 years ago…

We got VMware, VirtualBox.. We got Puppet, Chef, Ansible.. Everything is automatic!! Setup machine is just one click..


1 daySetup machine, Setup OS, Manually setup software, etc

Setup machine, Auto setup everything3 hours


We got clouds! !We don’t even need to have our own machine! !What a perfect world..

Auto setup everything30 mins

We trigger up a instance then trigger the auto-configure tool, and we can just waiting.. !I like AWS, I like Anisble, it make everything automatical, what we need to do is just waiting..

Why we still have to keep waiting ?

Hold..

1 min Start up instance

30 mins

29 mins Auto-configure server

Put everything

into the image

Packer Template File

1. { 2. "variables": { 3. "aws_access_key": "", 4. "aws_secret_key": "" 5. }, 6. "builders": [ 7. { 8. "type": "amazon-ebs", 9. "access_key": "{{user `aws_access_key`}}", 10. "secret_key": "{{user `aws_secret_key`}}", 11. "region": "us-east-1", 12. "source_ami": "ami-de0d9eb7", 13. "instance_type": "t1.micro", 14. "ssh_username": "ubuntu", 15. "ami_name": "packer {{timestamp}}" 16. } 17. ], 18. "provisioners": [ 19. { 20. "type": "shell", 21. "script": "setup_things.sh" 22. } 23. ] 24. }

• builders (required) • description (optional) • variables (optional) • provisioners (optional) • post-processors (optional)

Packer Command-line

packer build [-var ‘variable_name=value_string’] <template_file.json>

packer inspect <template_file.json>

packer validate <template_file.json>

packer fix <template_file.json>

Inspect

validate

build

fix

Packer as part of pipeline

Developing Testing Delivering

★ Fit for small system

★ Deploying can be tedious for large system

★ Take longer time and more network bandwidth with new test environment added

Packer as part of pipeline

Developing PackingTesting Delivering

Deliver imagesSafer deployment

Time saving

Parallel builds

Product Env.

Testing Env.

Developing

Packer

—— Dr. Packer

Configure once, Use anywhere

http://www.packer.io https://github.com/mitchellh/packer

https://github.com/mitchellh/packer

A Introduction of Packer

Technology

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