Everything-as-Code with Terraform

All Things Open, 2019.

Terraform is an Infrastructure as Code tool for declaratively building and maintaining complex infrastructures on one or more cloud providers/services. But Terraform also supports over 80 non-infrastructure providers! In this demo-driven talk, will dive into the internals of Terraform and see how it works. We will show how Terraform can be used for non-infrastructure use cases by showing examples. We’ll also take a look at on how you can extend Terraform to manage anything with an API.

Transcript

1. Copyright © 2019 HashiCorp Everything as Code with Terraform All Things Open | October 14, 2019
4. “I can’t stand using this interface to paste all of these code snippets.”
5. (Actually 2 years, ~20 blogs, and slightly more wisdom later…)
6. “Oh, I can build a Terraform provider that reads Markdown and sends it up to Medium.”
7. “Blog-as-Code”
8. Agenda Infrastructure-as-Code Terraforming the Datacenter Extending Terraform Writing a Provider Everything-as-Code Or Get Close 8
9. hashi.co/2019-ato
10. Infrastructure-as-Code Terraforming the Datacenter 10
11. Infrastructure-as-Code Goals ▪ Unify the view of resources ▪ Support the modern data center (IaaS, PaaS, SaaS) ▪ Expose a way for individuals and teams to safely and predictably change infrastructure ▪ Provide a workflow that is technology agnostic ▪ Manage anything with an API 11
12. “I don’t know how to code. But I do want to automate how I configure my infrastructure.” - An Infrastructure Engineer Who Started Using Public Cloud 12
13. “It was hard enough for me to learn infrastructure terms but writing code for it too? Difficult.” - A Developer Who Started Using Public Cloud 13
14. Terraform HashiCorp Configuration Language CODE EDITOR resource "google_compute_instance" "default" { name = "test" machine_type = "n1-standard-1" zone = "us-central1-a" tags = ["foo", "bar"] boot_disk { initialize_params { image = "debian-cloud/debian-9" } } // Local SSD disk scratch_disk { } network_interface { network = "default" access_config { // Ephemeral IP } 14
15. Extensible & Idempotent CODE EDITOR resource "datadog_monitor" "foo" { name = "Name for monitor foo" type = "metric alert" message = "Monitor triggered. Notify: @hipchat- channel" escalation_message = "Escalation message @pagerduty" query = "avg(last_1h):avg:aws.ec2.cpu{environment:foo,host:foo} by {host} > 4" thresholds = { ok = 0 warning = 2 warning_recovery = 1 critical = 4 critical_recovery = 3 } notify_no_data = false renotify_interval = 60 15
16. TERMINAL + resource will be created
 - resource will be destroyed
 ~ resource will be updated in-place
 -/+ resources will be destroyed and re-created 16
17. Infrastructure-as-Code github.com/joatmon08/2019-demo-ato
18. 18 terraform.io/docs/providers/
19. Extending Terraform Writing a Provider 19
20. terraform.io/docs/extend/how-terraform-works.html
21. Let’s build a provider. github.com/joatmon08/2019-demo-ato
22. Useful Resources ▪ Writing Custom Providers - official documentation ▪ Plugin SDK - now officially separated from core ▪ Creating a Terraform Provider for Just About Anything by Eddie Zanewski ▪ Check out other providers like AWS or GCP!
23. Everything-as-Code Or Get Close 23
24. Terraform Provider for Medium github.com/joatmon08/ terraform-provider- medium CODE EDITOR resource "medium_image" "draft" { file_path = "./images/draft.png" content_type = "image/png" } resource "medium_post" "my-post" { title = "Writing a Terraform Medium Provider" content = templatefile("./ content.md", { image_url = medium_image.draft.url }) content_format = "markdown" publish_status = "draft" tags = ["terraform", "medium", "automation"] }
25. Tips for Building _______-as-Code ▪ Non-ideal upstream APIs – Read-only provider – Write your own client ▪ Testing – Express functionality in acceptance tests – Examine interface changes with contract tests
26. Alerts-as-Code? Datadog Grafana PagerDuty To Do-as-Code? Google Calendar G Suite Todoist
 (link) Life-as-Code? Meetup 
 (community-as-code)
 Domino’s Pizza
 (pizza-as-code)
 Pokémon
 (catch 'em-all-as-code)
27. “I like your blog but we don’t speak much English. Do you have translations?” 27
29. Translated Blog-as-Code github.com/joatmon08/2019-demo-ato
30. “Doing Better”-through-Code 30
31. speakerdeck.com/joatmon08/everything-as-code-with-terraform Rosemary Wang (she/her) Developer Advocate at HashiCorp @joatmon08 joatmon08 linkedin.com/in/rosemarywang/ 31