Add option to download lambd's

Author: npalm

.github/workflows/lambda-runners.yml

@@ -0,0 +1,26 @@
+name: Lambda Runners
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    paths:
+      - .github/workflows/lambda-runners.yml
+      - "modules/runners/lambdas/runners/**"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container: node:12
+    defaults:
+      run:
+        working-directory: modules/runners/lambdas/runners
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install dependencies
+        run: yarn install
+      - name: Run tests
+        run: yarn test
+      - name: Build distribution
+        run: yarn build

README.md

@@ -62,7 +62,36 @@ Go to GitHub and create a new app. Beware you can create apps your organization
 
 ### Setup terraform module
 
-1. Create a terraform workspace and initiate the module, see the examples for more details.
+First you need to download the lambda's releases. THe lambda code is available as a GitHub release asset. Downloading can be done with the provided terraform module for example. Create in an empty workspace a terraform module:
+
+```terraform
+module "lambdas" {
+  source = "../../../modules/download-lambda"
+  lambdas = [
+    {
+      name = "webhook"
+      tag  = "v0.0.0-beta"
+    },
+    {
+      name = "runners"
+      tag  = "v0.0.0-beta"
+    },
+    {
+      name = "runner-binaries-syncer"
+      tag  = "v0.0.0-beta"
+    }
+  ]
+}
+
+output "files" {
+  value = module.lambdas.files
+}
+```
+
+Next run `terraform init && terraform apply` as result the lambdas will be download to the same directory.
+
+
+Next create a second terraform workspace and initiate the module, see the examples for more details.
 
 ```terraform
 module "runners" {
@@ -82,6 +111,9 @@ module "runners" {
     webhook_secret = "secret"
   }
 
+  webhook_lambda_zip                = "lambdas-download/webhook.zip"
+  runner_binaries_syncer_lambda_zip = "lambdas-download/runner-binaries-syncer.zip.zip"
+  runners_lambda_zip                = "lambdas-download/runners.zip"
   enable_organization_runners = true
 }
 ```
@@ -93,7 +125,7 @@ terraform init
 terrafrom apply
 ```
 
-3. Check the terraform output for the API gateway url, which you need in the next step.
+Check the terraform output for the API gateway url, which you need in the next step. The lambda for syncing the GitHub distribution will be executed by a trigger via Cloud Watch. To ensure the binary is cached, trigger the `runner-binaries-syncer` manually. The payload does not matter.
 
 ### Setup GitHub App (part 2)
 

examples/default/lambdas-download/main.tf

@@ -0,0 +1,21 @@
+module "lambdas" {
+  source = "../../../modules/download-lambda"
+  lambdas = [
+    {
+      name = "webhook"
+      tag  = "v0.0.0-beta"
+    },
+    {
+      name = "runners"
+      tag  = "v0.0.0-beta"
+    },
+    {
+      name = "runner-binaries-syncer"
+      tag  = "v0.0.0-beta"
+    }
+  ]
+}
+
+output "files" {
+  value = module.lambdas.files
+}

examples/default/main.tf

@@ -8,6 +8,11 @@ resource "random_password" "random" {
   length = 32
 }
 
+
+
+
+
+
 module "runners" {
   source = "../../"
 
@@ -28,8 +33,11 @@ module "runners" {
     webhook_secret = random_password.random.result
   }
 
-  enable_organization_runners = false
-  runner_extra_labels         = "default,example"
+  webhook_lambda_zip                = "lambdas-download/webhook.zip"
+  runner_binaries_syncer_lambda_zip = "lambdas-download/syncer.zip"
+  runners_lambda_zip                = "lambdas-download/runners.zip"
+  enable_organization_runners       = false
+  runner_extra_labels               = "default,example"
 }
 
 

modules/download-lambda/main.tf

@@ -0,0 +1,13 @@
+resource "null_resource" "download" {
+  count = length(var.lambdas)
+
+  triggers = {
+    name = var.lambdas[count.index].name
+    file = "${var.lambdas[count.index].name}.zip"
+    tag  = var.lambdas[count.index].tag
+  }
+
+  provisioner "local-exec" {
+    command = "curl -o ${self.triggers.file} -L https://github.com/philips-labs/terraform-aws-github-runner/releases/download/${self.triggers.tag}/${self.triggers.name}-${self.triggers.tag}.zip"
+  }
+}

modules/download-lambda/outputs.tf

@@ -0,0 +1,3 @@
+output "files" {
+  value = null_resource.download.*.triggers.file
+}

modules/download-lambda/variables.tf

@@ -0,0 +1,7 @@
+variable "lambdas" {
+  description = "Name and tag for lambdas to download."
+  type = list(object({
+    name = string
+    tag  = string
+  }))
+}