Install knative

knative/.gitignore

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+template
+build
+.secrets

knative/README.md

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+# What is Knative?
+
+A way to deploy FaaS objects into Kubernetes
+
+## How to get started
+
+Install the CLI
+
+```bash
+brew tap knative-sandbox/kn-plugins
+brew install func
+```
+
+To deploy a Knative function, use a yaml like the following:
+
+```yaml
+apiVersion: serving.knative.dev/v1
+kind: Service
+metadata:
+  name: hello
+spec:
+  template:
+    spec:
+      containers:
+        - image: ghcr.io/knative/helloworld-go:latest # Container to be used
+          ports:
+            - containerPort: 8080
+          env:
+            - name: TARGET # Env vars
+              value: "World"
+```
+
+The lifecycle of building and deploying the image used as the service
+is described [here](https://knative.dev/docs/getting-started/create-a-function/)
+
+e.g. the following will create a folder with a python function in it
+
+```bash
+func create -l python hello
+```

knative/dev/backend.tf

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+
+terraform {
+  # DigitalOcean uses the S3 spec.
+  backend "s3" {
+    bucket   = "treetracker-dev-terraform"
+    key      = "terraform-knative.tfstate"
+    endpoint = "https://sfo2.digitaloceanspaces.com"
+    # DO uses the S3 format
+    # eu-west-1 is used to pass TF validation
+    # Region is ACTUALLY sfo2 on DO
+    region = "eu-west-1"
+    # Deactivate a few checks as TF will attempt these against AWS
+    skip_credentials_validation = true
+    skip_metadata_api_check     = true
+    skip_region_validation      = true
+  }
+}

knative/dev/main.tf

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+module "knative" {
+  source       = "../knative_k8s"
+  cluster_name = "dev-k8s-treetracker"
+}

knative/dev/provider.tf

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+terraform {
+  required_providers {
+    digitalocean = {
+      source  = "digitalocean/digitalocean"
+      version = "2.28.1"
+    }
+    kubernetes = "2.16.1"
+    helm       = "2.8.0"
+  }
+}

knative/knative_k8s/knative_eventing.yaml

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+apiVersion: v1
+kind: Namespace
+metadata:
+  name: knative-eventing
+---
+apiVersion: operator.knative.dev/v1beta1
+kind: KnativeEventing
+metadata:
+  name: knative-eventing
+  namespace: knative-eventing

knative/knative_k8s/knative_serving.yaml

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+apiVersion: v1
+kind: Namespace
+metadata:
+  name: knative-serving
+---
+apiVersion: operator.knative.dev/v1beta1
+kind: KnativeServing
+metadata:
+  name: knative-serving
+  namespace: knative-serving

knative/knative_k8s/main.tf

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+data "digitalocean_kubernetes_cluster" "dev" {
+  name = var.cluster_name
+}
+
+
+provider "kubernetes" {
+  host  = data.digitalocean_kubernetes_cluster.dev.endpoint
+  token = data.digitalocean_kubernetes_cluster.dev.kube_config[0].token
+  cluster_ca_certificate = base64decode(
+    data.digitalocean_kubernetes_cluster.dev.kube_config[0].cluster_ca_certificate
+  )
+}
+
+provider "kubectl" {
+  host  = data.digitalocean_kubernetes_cluster.dev.endpoint
+  token = data.digitalocean_kubernetes_cluster.dev.kube_config[0].token
+  cluster_ca_certificate = base64decode(
+    data.digitalocean_kubernetes_cluster.dev.kube_config[0].cluster_ca_certificate
+  )
+}
+
+data "http" "knative_operator_yaml" {
+  url = "https://github.com/knative/operator/releases/download/knative-v1.10.2/operator.yaml"
+
+  # Optional request headers
+  request_headers = {
+    Accept = "application/yaml"
+  }
+}
+
+data "kubectl_file_documents" "docs" {
+  content = tostring(data.http.knative_operator_yaml.body)
+}
+
+resource "kubectl_manifest" "knative_operator" {
+  for_each  = data.kubectl_file_documents.docs.manifests
+  yaml_body = each.value
+}
+
+data "kubectl_file_documents" "serving_docs" {
+  content = file("${path.module}/knative_serving.yaml")
+}
+
+resource "kubectl_manifest" "knative_serving" {
+  for_each  = data.kubectl_file_documents.serving_docs.manifests
+  yaml_body = each.value
+}
+
+
+
+data "kubectl_file_documents" "eventing_docs" {
+  content = file("${path.module}/knative_eventing.yaml")
+}
+
+resource "kubectl_manifest" "knative_eventing" {
+  for_each  = data.kubectl_file_documents.eventing_docs.manifests
+  yaml_body = each.value
+}

knative/knative_k8s/provider.tf

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+terraform {
+  required_providers {
+    digitalocean = {
+      source  = "digitalocean/digitalocean"
+      version = "2.28.1"
+    }
+    kubernetes = "2.16.1"
+    kubectl = {
+      source  = "gavinbunney/kubectl"
+      version = "1.14.0"
+    }
+  }
+}

knative/knative_k8s/variables.tf

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+variable "cluster_name" {
+  type = string
+}

knative/prod/backend.tf

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+
+terraform {
+  # DigitalOcean uses the S3 spec.
+  backend "s3" {
+    bucket   = "treetracker-production-terraform"
+    key      = "terraform-knative.tfstate"
+    endpoint = "https://sfo2.digitaloceanspaces.com"
+    # DO uses the S3 format
+    # eu-west-1 is used to pass TF validation
+    # Region is ACTUALLY sfo2 on DO
+    region = "eu-west-1"
+    # Deactivate a few checks as TF will attempt these against AWS
+    skip_credentials_validation = true
+    skip_metadata_api_check     = true
+    skip_region_validation      = true
+  }
+}

knative/prod/main.tf

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+module "knative" {
+  source       = "../knative_k8s"
+  cluster_name = "prod-k8s-treetracker"
+}

knative/prod/provider.tf

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+terraform {
+  required_providers {
+    digitalocean = {
+      source  = "digitalocean/digitalocean"
+      version = "2.28.1"
+    }
+    kubernetes = "2.16.1"
+    helm       = "2.8.0"
+  }
+}

knative/test/backend.tf

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+
+terraform {
+  # DigitalOcean uses the S3 spec.
+  backend "s3" {
+    bucket   = "treetracker-test-terraform"
+    key      = "terraform-knative.tfstate"
+    endpoint = "https://sfo2.digitaloceanspaces.com"
+    # DO uses the S3 format
+    # eu-west-1 is used to pass TF validation
+    # Region is ACTUALLY sfo2 on DO
+    region = "eu-west-1"
+    # Deactivate a few checks as TF will attempt these against AWS
+    skip_credentials_validation = true
+    skip_metadata_api_check     = true
+    skip_region_validation      = true
+  }
+}

knative/test/main.tf

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+module "knative" {
+  source       = "../knative_k8s"
+  cluster_name = "test-k8s-treetracker"
+}

knative/test/provider.tf

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+terraform {
+  required_providers {
+    digitalocean = {
+      source  = "digitalocean/digitalocean"
+      version = "2.28.1"
+    }
+    kubernetes = "2.16.1"
+    helm       = "2.8.0"
+  }
+}