Infrastructure as Code with Terraform

A short intro to Infrastructure as Code using terraform. Talk for GDLJS https://www.meetup.com/Guadalajara-JS/events/236104692/.

Repo with example at https://github.com/orlando/terraform-intro

Transcript

1. Infrastructure
   as Code
   with Terraform
   Orlando Del Aguila
   GDLJS S02E08
   

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2. @orlando
   @eatcodetravel
   @eatcodetravel
   eatcodetravel.com
   

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3. www.hashlabs.com
   

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4. Infrastructure
   as Code
   source: http://www.itnews.com.au/news/facebook-powers-up-arctic-circle-data-centre-346509
   

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5. source: http://www.itnews.com.au/news/facebook-powers-up-arctic-circle-data-centre-346509
   

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6. “Write and execute code
   to define, deploy and update
   infrastructure”
   IAC / What
   

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7. • Ad hoc scripts
   • Configuration Management
   • Server Templating
   • Infrastructure Definition
   IAC / Types
   

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8. Snowflake servers
   IAC / Why
   

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9. Snowflake servers
   IAC / Why
   

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10. Confidence
    IAC / Why
    

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11. Self-service
    IAC / Why
    source: https://www.flickr.com/photos/smdevivo/5524665573
    

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12. Documentation
    IAC / Why
    

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13. Version Control
    IAC / Why
    

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14. Coding best practices
    IAC / Why
    DRY / Testing / ❤
    

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15. 2016 DevOps Report*
    IAC / Why
    • 24x faster to recover from failure
    • 50% less time to find issues
    • 200x more deploys
    • 2.2x engineer happiness**
    ** Likeliness to recommend their place of work to others
    * puppet.com/resources/white-paper/2016-state-of-devops-report
    

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16. Terraform
    source: http://no-mans-sky.com/press/sheet.php?p=no_man%27s_sky
    

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17. HashiCorp
    Terraform / What
    

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18. Infrastructure definition
    Terraform / What
    

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19. Deterministic
    execution
    Terraform / What
    

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20. Multi provider support
    Terraform / What
    

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21. Uses HCL as language
    Terraform / What
    

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22. Golang OS Project
    Terraform / What
    

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23. Golang OS Project
    Terraform / What
    

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24. Translates HCL templates
    into API calls
    Terraform / How
    

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25. Saves current state
    as a file
    Terraform / How
    

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26. Diffs from the
    current state to
    apply changes
    Terraform / How
    

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27. Terraform / Syntax
    data "aws_ami" "ubuntu" {
    most_recent = true
    filter {
    name = "name"
    values = ["ubuntu/images/hvm-ssd/ubuntu-trusty-*"]
    }
    }
    resource "aws_instance" "example" {
    ami = "${data.aws_ami.ubuntu.id}"
    instance_type = "t2.micro"
    }
    

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28. Terraform / Syntax
    data "aws_ami" "ubuntu" {
    most_recent = true
    filter {
    name = "name"
    values = [“ubuntu/images/hvm-ssd/ubuntu-trusty-*"]
    }
    }
    resource "aws_instance" "example" {
    ami = "${data.aws_ami.ubuntu.id}"
    instance_type = "t2.micro"
    }
    

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29. Terraform / Syntax
    data "aws_ami" "ubuntu" {
    most_recent = true
    filter {
    name = "name"
    values = [“ubuntu/images/hvm-ssd/ubuntu-trusty-*"]
    }
    }
    resource "aws_instance" "example" {
    ami = "${data.aws_ami.ubuntu.id}"
    instance_type = "t2.micro"
    }
    

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30. Terraform / Syntax
    data "aws_ami" "ubuntu" {
    most_recent = true
    filter {
    name = "name"
    values = [“ubuntu/images/hvm-ssd/ubuntu-trusty-*"]
    }
    }
    resource "aws_instance" "example" {
    ami = "${data.aws_ami.ubuntu.id}"
    instance_type = "t2.micro"
    }
    

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31. Terraform / Syntax
    data "aws_ami" "ubuntu" {
    most_recent = true
    filter {
    name = "name"
    values = [“ubuntu/images/hvm-ssd/ubuntu-trusty-*"]
    }
    }
    resource "aws_instance" "example" {
    ami = "${data.aws_ami.ubuntu.id}"
    instance_type = "t2.micro"
    }
    

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32. Terraform / Syntax
    data "aws_ami" "ubuntu" {
    most_recent = true
    filter {
    name = "name"
    values = [“ubuntu/images/hvm-ssd/ubuntu-trusty-*"]
    }
    }
    resource "aws_instance" "example" {
    ami = "${data.aws_ami.ubuntu.id}"
    instance_type = "t2.micro"
    }
    

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33. Terraform / Syntax
    data "aws_ami" "ubuntu" {
    most_recent = true
    filter {
    name = "name"
    values = [“ubuntu/images/hvm-ssd/ubuntu-trusty-*"]
    }
    }
    resource "aws_instance" "example" {
    ami = "${data.aws_ami.ubuntu.id}"
    instance_type = "t2.micro"
    }
    resource "aws_eip" "example_eip" {
    instance = "${aws_instance.example.id}"
    }
    

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34. Terraform / Syntax
    data "aws_ami" "ubuntu" {
    most_recent = true
    filter {
    name = "name"
    values = [“ubuntu/images/hvm-ssd/ubuntu-trusty-*"]
    }
    }
    resource "aws_instance" "example" {
    ami = "${data.aws_ami.ubuntu.id}"
    instance_type = "t2.micro"
    }
    resource "aws_eip" "example_eip" {
    instance = "${aws_instance.example.id}"
    }
    // IP of the Bastion EC2 instance
    output "ip" {
    value = "${aws_eip.example_eip.public_ip}"
    }
    

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35. Terraform / Syntax
    ...
    variable "instance_type" {
    description = "EC2 instance type"
    default = "t2.nano"
    }
    resource "aws_instance" "example" {
    ami = "${data.aws_ami.ubuntu.id}"
    instance_type = "${var.instance_type}"
    }
    ...
    

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36. Terraform / Syntax / Modules
    # Create instances
    module "t2nano" {
    source = "./aws_instance"
    instance_type = "t2.nano"
    }
    module "t2micro" {
    source = "./aws_instance"
    instance_type = "t2.micro"
    }
    # Output variables
    output "t2microip" {
    value = "${module.t2micro.ip}"
    }
    output "t2small" {
    value = "${module.t2small.ip}"
    }
    

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37. Keep one .tfstate
    per environment
    Terraform / Tips
    

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38. Use a remote store
    for your .tfstate file
    Terraform / Tips
    

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39. Store your
    terraform.tfvars in
    your remote*
    Terraform / Tips
    * this is how we do it, and works for us
    

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40. terraform.io/docs
    github.com/orlando/terraform-intro
    github.com/hashicorp/terraform
    github.com/terraform-community-modules
    github.com/segmentio/terraform-docs
    Terraform / Resources
    

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41. Thanks
    
    source: http://no-mans-sky.com/press/sheet.php?p=no_man%27s_sky
    

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