crossplane-terraform_eng.md

CROSSPLANE TERRAFORM PROVIDER: IAC ON STEROIDS

EXTRACT:

• crossplane enables orchestrating applications and infrastructure no matter where they run
• kubernetes declarative API is used to define the desired state of infrastructure -> crossplane takes care of the rest
• resources are manageable across multiple clouds or clusters without creating code

PREFACE: CROSSPLANE TERMINOLOGY

PROVIDER: A provider extends Crossplane by installing controllers for new kinds of managed resources XRD (Composite Resource Definition): define new types of composite resources and claims CLAIM XRC”, or just “a claim” is also an API type defined using Crossplane. Each type of claim corresponds to a type of composite resource, and the pair have nearly identical schemas.

PREPARATION: CROSSPLANE DEPLOYMENT

DEPLOYMENT

CLI INSTALLATION

curl -sL "https://raw.githubusercontent.com/crossplane/crossplane/master/install.sh" | sh
sudo mv crossplane /usr/local/bin

DEPLOYMENT W/ HELM

provider-helm

kubectl create namespace crossplane-system
helm repo add crossplane-stable https://charts.crossplane.io/stable && helm repo update

helm upgrade --install crossplane --wait \
--namespace crossplane-system \
crossplane-stable/crossplane --version 1.14.5

kubectl api-resources | grep upbound

PREPARATION: TERRAFORM PROVIDER DEPLOYMENT

TERRAFORM PROVIDER DEPLOYMENT

# CONTROLLER REF
apiVersion: pkg.crossplane.io/v1
kind: Provider
metadata:
  name: provider-terraform
spec:
  package: xpkg.upbound.io/upbound/provider-terraform:v0.13.0
  controllerConfigRef:
    name: cert-bundle

PREPARATION: TERRAFORM PROVIDER CONFIGURATION

HELLO-WORLD: INLINE-WORKSPACE

HELLO-WORLD: REMOTE MODULE-CALL