Everything as Code with Terraform
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This document discusses using Terraform to implement infrastructure as code and extending Terraform capabilities. It describes how Terraform allows configuring and provisioning infrastructure through code in a declarative way. It then discusses how a provider was built to manage Medium blog posts and images as code. The presentation encourages thinking about supporting other domains as code through custom providers that integrate with APIs.
![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](https://image.slidesharecdn.com/20191013-everythingascode-191021202057/85/Everything-as-Code-with-Terraform-14-320.jpg)
![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"]
}](https://image.slidesharecdn.com/20191013-everythingascode-191021202057/85/Everything-as-Code-with-Terraform-24-320.jpg)
Everything as Code with Terraform
- 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.”
- 8. Agenda Infrastructure-as-Code Terraforming the Datacenter Extending Terraform Writing a Provider Everything-as-Code Or Get Close 8
- 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
- 19. Extending Terraform Writing a Provider 19
- 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!
- 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
- 31. speakerdeck.com/joatmon08/everything-as-code-with-terraform Rosemary Wang (she/her) Developer Advocate at HashiCorp @joatmon08 joatmon08 linkedin.com/in/rosemarywang/ 31