DevOps RVA Meetup: Terraforming Your Infrastructure

Overview of Hashicorp's Terraform tool. Includes a demo using Terraform to build a Docker Swarm cluster as well as using Terraform to orchestrate the deployment of containers onto the Swarm cluster.

Transcript

1. Terraforming Your Infrastructure Presented by: Roderick R. Randolph
2. Who am I • Triple R • Capital One • Toronto • Amelia • Dev/Ops Roderick R. Randolph Opinions expressed are solely my own and do not express the views or opinions of my employer.
3. Agenda • Terraform Overview • Terraform Demo • Docker Swarm • NodeJS App • CI/CD pipeline
5. Terraform
8. Terraform is a tool for building, combining, and versioning infrastructure safely and efficiently https://www.terraform.io/intro/index.html
9. Hmm, sounds like some other tools…
10. Terraform is a tool for building, combining, and versioning infrastructure safely and efficiently
11. Terraform is a tool for building, combining, and versioning infrastructure safely and efficiently
12. Building… HashiCorp Configuration Language (HCL) https://github.com/hashicorp/hcl resource "aws_instance" "app" { count = 5 ami = "ami-408c7f28" instance_type = "t1.micro" } File: main.tf
13. Building… { "resource": { "aws_instance": { "app": { "count": "5", "ami": "ami-408c7f28", "instance_type": "t1.micro" } } } } File: main.tf.json
14. Terraform is a tool for building, combining, and versioning infrastructure safely and efficiently
15. Combining… Terraform is agnostic to the underlying platforms by supporting providers. A provider is responsible for understanding API interactions and exposing resources.
16. Terraform is a tool for building, combining, and versioning infrastructure safely and efficiently
17. Versioning… resource "aws_instance" "app" { count = 5 ami = "ami-408c7f28" instance_type = "t1.micro" } Infrastructure as Code – Simple configuration files that are versioned, managed, and treated like source code.
18. Versioning… terraform.tfstate The terraform state file maps various resource metadata to actual resource IDs so that Terraform knows what it is managing. This file must be saved and distributed to anyone who might run Terraform.
19. Terraform is a tool for building, combining, and versioning infrastructure safely and efficiently
20. Safely… $ terraform plan –out my.plan ... ~ aws_autoscaling_group.my_asg load_balancers.#: "0" => "1" load_balancers.887959510: "" => "app-elb" + aws_instance.app ami: "" => "ami-08111162" instance_type: "" => "t2.nano" private_ip: "" => "10.0.0.4" -/+ aws_launch_configuration.my_lc image_id: "ami-09831364" => "ami-08111162" (forces new resource)
21. Safely… $ terraform apply my.plan ... Apply complete! Resources: 1 added, 1 changed, 1 destroyed.
22. Terraform is a tool for building, combining, and versioning infrastructure safely and efficiently
23. Efficiently… resource "aws_elb" "frontend" { name = "frontend-load-balancer" listener { instance_port = 8000 instance_protocol = "http" lb_port = 80 lb_protocol = "http" } instances = ["${aws_instance.app.*.id}"] } resource "aws_instance" "app" { count = 5 ami = "ami-408c7f28" instance_type = "t1.micro" }
24. Efficiently… • Resource Graph • Dependency management • Parallelism
25. Provisioners
26. Provisioners • Natively supported provisioners • Chef • Connection (establishes a raw SSH or WinRM connection) • File • Local Exec (local shell) • Remote Exec (remote SSH / WinRM) • Null Resource • Used to initialize a resource after creation (e.g. invoke a shell script or run a CM tool) • Not a replacement for CM tools (rather complements them!)
27. Misc • GitHub: 4511 stars / 1310 forks / 452 contributors / 32 releases • Latest version: v0.6.14 • Usually monthly releases (sometimes semi-monthly) • New features are sometimes added before available via CloudFormation • Terraform also supports CloudFormation as a resource
28. Demo: Triple R Tracker
29. Consul Consul Consul Swarm Manager Swarm Manager Swarm Manager p: 8500 p: 8301 p: 2376 Swarm Node Swarm Node Swarm Node Swarm Node Swarm Node p: 80 tracker.tripler.tech p: 8080 p: 8500 p: 3376 p: 3376 swarm.tripler.tech L L DynamoDB p: 443
30. Resources • https://www.terraform.io/docs/index.html • https://github.com/dtan4/terraforming • https://buildkite.com/ • https://github.com/roderickrandolph/tripler-tracker