Everything-as-Code with Terraform

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“I can’t stand using this interface to paste all of these code snippets.”

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(Actually 2 years, ~20 blogs, and slightly more wisdom later…)

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“Oh, I can build a Terraform provider that reads Markdown and sends it up to Medium.”

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“Blog-as-Code”

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Agenda Infrastructure-as-Code Terraforming the Datacenter Extending Terraform Writing a Provider Everything-as-Code Or Get Close 8

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hashi.co/2019-ato

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Infrastructure-as-Code Terraforming the Datacenter 10

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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

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“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

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“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

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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

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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

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TERMINAL + resource will be created  - resource will be destroyed  ~ resource will be updated in-place  -/+ resources will be destroyed and re-created 16

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Infrastructure-as-Code github.com/joatmon08/2019-demo-ato

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18 terraform.io/docs/providers/

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Extending Terraform Writing a Provider 19

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terraform.io/docs/extend/how-terraform-works.html

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Let’s build a provider. github.com/joatmon08/2019-demo-ato

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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!

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Everything-as-Code Or Get Close 23

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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"] }

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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

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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)

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“I like your blog but we don’t speak much English. Do you have translations?” 27

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Translated Blog-as-Code github.com/joatmon08/2019-demo-ato

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“Doing Better”-through-Code 30

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speakerdeck.com/joatmon08/everything-as-code-with-terraform Rosemary Wang (she/her) Developer Advocate at HashiCorp @joatmon08 joatmon08 linkedin.com/in/rosemarywang/ 31