Migrate Terraform to use Github App (#19)

.github/workflows/terraform_plan.yaml

@@ -16,10 +16,10 @@ jobs:
     runs-on: [ "229685449397" ]
 
     env:
-#       GITHUB_APP_ID: ${{ vars.GH_APP_ID }}
-#       GITHUB_APP_INSTALLATION_ID: ${{ vars.GH_APP_INSTALLATION_ID }}
-#       GITHUB_APP_PEM_FILE: ${{ secrets.GH_APP_PEM_FILE }}
-      GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
+#     GITHUB_APP_ID: ${{ vars.GH_APP_ID }}
+      GITHUB_APP_INSTALLATION_ID: ${{ vars.GH_APP_INSTALLATION_ID }}
+      GITHUB_APP_PEM_FILE: ${{ secrets.GH_APP_PEM_FILE }}
+#     GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
       GITHUB_OWNER: CSVD
       GITHUB_BASE_URL: https://github.e.it.census.gov/
       TF_WORKSPACE: ${{ vars.terraform_workspace }}
@@ -48,7 +48,12 @@ jobs:
           echo AWS_SECRET_ACCESS_KEY=`jq -r '.SecretAccessKey' aws_credentials.json` >> $GITHUB_ENV
           aws configure set aws_session_token `jq -r '.Token' aws_credentials.json`
           echo AWS_SESSION_TOKEN=`jq -r '.Token' aws_credentials.json` >> $GITHUB_ENV
-          
+
+      - name: Setup GITHUB Credentials
+        id: github_credentials
+        run: |
+          echo GITHUB_TOKEN=$(python encode_jwt.py "$GITHUB_APP_PEM_FILE" "$GITHUB_APP_INSTALLATION_ID" "$GITHUB_BASE_URL") >> $GITHUB_ENV
+
       - name: Terraform Init
         id: init
         run: /opt/tfenv/bin/terraform init -upgrade

data.tf

@@ -1,3 +1 @@
-data "aws_region" "current" {}
-
 data "github_organization_teams" "teams" {}

encode_jwt.py

@@ -0,0 +1,80 @@
+## Run this script set the private key as github_app_private_key and installation_id as the installation id of the app
+
+#export REQUESTS_CA_BUNDLE=/etc/ssl/certs/ca-bundle.crt
+#export github_app_private_key="-----BEGIN"
+#export github_app_installation_id=11
+#export github_app_url=https://github.e.it.census.gov
+#export GITHUB_TOKEN=$(python encode_jwt.py "$github_app_private_key" "$github_app_installation_id" "$github_app_url")
+
+import time
+import json
+import base64
+import argparse
+import requests
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.asymmetric import padding
+from cryptography.hazmat.primitives.serialization import load_pem_private_key
+import sys
+
+# Set up argument parser
+parser = argparse.ArgumentParser(description='Encode JWT with RS256 and get GitHub Enterprise installation access token')
+parser.add_argument('private_key', type=str, help='PEM formatted private key string')
+parser.add_argument('installation_id', type=str, help='GitHub App Installation ID')
+parser.add_argument('enterprise_url', type=str, help='GitHub Enterprise API URL (e.g., https://github.e.it.census.gov)')
+args = parser.parse_args()
+
+# Load the PEM private key
+private_key = load_pem_private_key(args.private_key.encode(), password=None)
+
+# JWT Header
+header = {
+    "alg": "RS256",
+    "typ": "JWT"
+}
+
+# JWT Payload
+payload = {
+    "iat": int(time.time()),
+    "exp": int(time.time()) + (10 * 60),
+    "iss": "6"  # Replace with your actual GitHub App ID
+}
+
+# Encode Header and Payload as Base64
+header_encoded = base64.urlsafe_b64encode(json.dumps(header).encode()).decode().rstrip("=")
+payload_encoded = base64.urlsafe_b64encode(json.dumps(payload).encode()).decode().rstrip("=")
+
+# Create the message (header + payload)
+message = f"{header_encoded}.{payload_encoded}".encode()
+
+# Sign the message using RS256
+signature = private_key.sign(
+    message,
+    padding.PKCS1v15(),
+    hashes.SHA256()
+)
+
+# Encode the signature in Base64
+signature_encoded = base64.urlsafe_b64encode(signature).decode().rstrip("=")
+
+# Construct the full JWT
+jwt_token = f"{header_encoded}.{payload_encoded}.{signature_encoded}"
+
+# Prepare the request to get the installation access token
+headers = {
+    "Authorization": f"Bearer {jwt_token}",
+    "Accept": "application/vnd.github+json"
+}
+
+# Make the request to the GitHub Enterprise API to get the installation access token
+url = f"{args.enterprise_url}api/v3/app/installations/{args.installation_id}/access_tokens"
+response = requests.post(url, headers=headers)
+
+# Check if the request was successful
+if response.status_code == 201:
+    installation_access_token = response.json().get('token')
+    print(installation_access_token)  # Output the token only
+else:
+    # Raise an error with a message
+    sys.stderr.write(f"Error: Failed to get installation access token. Status code: {response.status_code}\n")
+    sys.stderr.write(f"{response.text}\n")
+    sys.exit(1)  # Exit with an error code

image-pipeline.tf

@@ -50,7 +50,7 @@ module "asset_releases" {
   github_repo_description = "Terraform Workspace for publishing image-pipeline-assets"
   repo_org                = "CSVD"
   name                    = "image-pipeline-asset-releases"
-  github_org_teams       = local.github_organization_teams
+  github_org_teams        = local.github_organization_teams
   github_repo_topics = [
     "terraform"
   ]
@@ -68,7 +68,7 @@ module "aws_image_pipeline" {
   github_repo_description = "Terraform Workspace for creating and managing AWS Image Pipelines"
   repo_org                = "CSVD"
   name                    = "aws-image-pipeline"
-  github_org_teams       = local.github_organization_teams
+  github_org_teams        = local.github_organization_teams
   github_repo_topics = [
     "terraform"
   ]
@@ -112,7 +112,7 @@ module "terraform_aws_image_pipeline" {
   github_repo_description = "Terraform Module that creates codepipeline and codebuild jobs and other resources for building and deploying images"
   repo_org                = "CSVD"
   name                    = "terraform-aws-image-pipeline"
-  github_org_teams       = local.github_organization_teams
+  github_org_teams        = local.github_organization_teams
   github_repo_topics = [
     "terraform"
   ]

main.tf

@@ -27,7 +27,7 @@ module "elastic_beanstalk" {
   enforce_prs            = false
   collaborators          = local.collaborators
   pull_request_bypassers = local.pull_request_bypassers
-  github_org_teams       = local.github_organization_teams 
+  github_org_teams       = local.github_organization_teams
 }
 
 
@@ -273,7 +273,7 @@ module "setup_terraform" {
   create_codeowners = false
   enforce_prs       = false
   collaborators     = local.collaborators
-  github_org_teams       = local.github_organization_teams
+  github_org_teams  = local.github_organization_teams
 }
 
 module "setup_node" {
@@ -289,7 +289,7 @@ module "setup_node" {
   create_codeowners = false
   enforce_prs       = false
   collaborators     = local.collaborators
-  github_org_teams       = local.github_organization_teams
+  github_org_teams  = local.github_organization_teams
 }
 
 # ghe-runner
@@ -306,7 +306,7 @@ module "ghe_runners" {
   create_codeowners = false
   enforce_prs       = false
   collaborators     = local.collaborators
-  github_org_teams       = local.github_organization_teams
+  github_org_teams  = local.github_organization_teams
 }
 
 module "vpc_services" {

morpheus.tf

@@ -10,7 +10,7 @@ module "morpheus_repos" {
   source   = "HappyPathway/repo/github"
   #github_codeowners_team  = "CSVD"
   github_repo_description = "Repo for morpheus cloud"
-  github_org_teams       = local.github_organization_teams
+  github_org_teams        = local.github_organization_teams
   repo_org                = "CSVD"
   name                    = each.value
   github_repo_topics = [

repolist.tf

@@ -0,0 +1,18 @@
+module "repo_list" {
+  source   = "HappyPathway/repo/github"
+  for_each = tomap({ for repo in var.repolist : repo.name => repo })
+  #github_codeowners_team  = "CSVD"
+  github_repo_description = each.value.description
+  repo_org                = each.value.repo_org
+  name                    = each.value.name
+  github_repo_topics = [
+    "terraform"
+  ]
+  is_template            = each.value.is_template
+  force_name             = true
+  create_codeowners      = false
+  enforce_prs            = each.value.enforce_prs
+  collaborators          = local.collaborators
+  pull_request_bypassers = local.pull_request_bypassers
+  github_org_teams       = local.github_organization_teams
+}

sandbox.tf

@@ -19,7 +19,7 @@ module "sandbox" {
   create_codeowners = false
   enforce_prs       = false
   collaborators     = { "arnol377" : "admin" }
-  github_org_teams       = local.github_organization_teams
+  github_org_teams  = local.github_organization_teams
   managed_extra_files = [
     {
       path = ".github/workflows/terraform-plan.yaml"

varfiles/default.tfvars

@@ -1,3 +1,17 @@
 image_pipeline_workflows = {
   "image-pipeline-goss-testing" = "./workflows/goss-testing.yaml"
 }
+
+repolist = [
+    {
+      description       = "Managing AWS CSVD Secrets"
+      repo_org          = "CSVD"
+      name              = "aws-secrets"
+    },
+    {
+      description       = "Tools for managing Terraform"
+      repo_org          = "CSVD"
+      name              = "tf-tools"
+    } 
+]
+

variables.tf

@@ -1,3 +1,15 @@
 variable "image_pipeline_workflows" {
   type = map(string)
 }
+
+variable "repolist" {
+  type = list(object({
+    description       = string
+    repo_org          = string
+    name              = string
+    is_template       = optional(bool, false)
+    create_codeowners = optional(bool, false)
+    enforce_prs       = optional(bool, false)
+  }))
+  default = []
+}

versions.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     random = {
       source  = "integrations/github"
-      version = ">= 6.2.2"
+      version = ">= 6.3.0"
     }
     aws = {
       source  = "hashicorp/aws"