From e972863be6d54b8dc64b1a7209392d5af7cb80fd Mon Sep 17 00:00:00 2001
From: Sam Alba <sam.alba@gmail.com>
Date: Mon, 12 Apr 2021 16:19:15 -0700
Subject: [PATCH] examples/jamstack: implemented database integration with RDS

Signed-off-by: Sam Alba <sam.alba@gmail.com>
---
 examples/jamstack/backend.cue  | 21 -----------------
 examples/jamstack/database.cue | 41 ++++++++++++++++++++++++++++++++++
 examples/jamstack/ecs.cue      |  2 +-
 examples/jamstack/infra.cue    | 31 +++++++++++++++++++++++++
 examples/jamstack/main.cue     | 18 +++++++++++++++
 5 files changed, 91 insertions(+), 22 deletions(-)
 create mode 100644 examples/jamstack/database.cue
 create mode 100644 examples/jamstack/infra.cue

diff --git a/examples/jamstack/backend.cue b/examples/jamstack/backend.cue
index 39fdbaf1..40458217 100644
--- a/examples/jamstack/backend.cue
+++ b/examples/jamstack/backend.cue
@@ -2,30 +2,9 @@ package main
 
 import (
 	"dagger.io/dagger"
-	"dagger.io/aws"
 	"dagger.io/aws/ecs"
 )
 
-infra: {
-	// AWS auth & default region
-	awsConfig: aws.#Config
-
-	// VPC Id
-	vpcId: string
-
-	// ECR Image repository
-	ecrRepository: string
-
-	// ECS cluster name
-	ecsClusterName: string
-
-	// Execution Role ARN used for all tasks running on the cluster
-	ecsTaskRoleArn?: string
-
-	// ELB listener ARN
-	elbListenerArn: string
-}
-
 // Backend configuration
 backend: {
 	// Source code to build this container
diff --git a/examples/jamstack/database.cue b/examples/jamstack/database.cue
new file mode 100644
index 00000000..93edbe43
--- /dev/null
+++ b/examples/jamstack/database.cue
@@ -0,0 +1,41 @@
+package main
+
+import (
+	"encoding/base64"
+	"dagger.io/aws/rds"
+)
+
+database: {
+	let slug = name
+	dbType: "mysql"
+
+	db: rds.#CreateDB & {
+		config:    infra.awsConfig
+		name:      slug
+		dbArn:     infra.rdsInstanceArn
+		"dbType":  dbType
+		secretArn: infra.rdsAdminSecretArn
+	}
+
+	user: rds.#CreateUser & {
+		config:    infra.awsConfig
+		dbArn:     infra.rdsInstanceArn
+		"dbType":  dbType
+		secretArn: infra.rdsAdminSecretArn
+		username:  slug
+		// FIXME: make it secure (generate infra side?)
+		password:      base64.Encode(null, "pwd-\(slug)")
+		grantDatabase: db.out
+	}
+
+	instance: rds.#Instance & {
+		config: infra.awsConfig
+		dbArn:  infra.rdsInstanceArn
+	}
+
+	hostname: instance.hostname
+	port:     instance.port
+	dbName:   db.out
+	username: user.out
+	password: user.password
+}
diff --git a/examples/jamstack/ecs.cue b/examples/jamstack/ecs.cue
index 1f018ecf..e496c8ac 100644
--- a/examples/jamstack/ecs.cue
+++ b/examples/jamstack/ecs.cue
@@ -53,7 +53,7 @@ import (
 
 	template: {
 		AWSTemplateFormatVersion: "2010-09-09"
-		Description:              "Blocklayer deployed app"
+		Description:              "Dagger deployed app"
 		Parameters: {
 			ELBRulePriority: Type: "Number"
 			ImageRef: Type:        "String"
diff --git a/examples/jamstack/infra.cue b/examples/jamstack/infra.cue
new file mode 100644
index 00000000..e0c3bd07
--- /dev/null
+++ b/examples/jamstack/infra.cue
@@ -0,0 +1,31 @@
+package main
+
+import (
+	"dagger.io/aws"
+)
+
+infra: {
+	// AWS auth & default region
+	awsConfig: aws.#Config
+
+	// VPC Id
+	vpcId: string
+
+	// ECR Image repository
+	ecrRepository: string
+
+	// ECS cluster name
+	ecsClusterName: string
+
+	// Execution Role ARN used for all tasks running on the cluster
+	ecsTaskRoleArn?: string
+
+	// ELB listener ARN
+	elbListenerArn: string
+
+	// Secret ARN for the admin password of the RDS Instance
+	rdsAdminSecretArn: string
+
+	// ARN of the RDS Instance
+	rdsInstanceArn: string
+}
diff --git a/examples/jamstack/main.cue b/examples/jamstack/main.cue
index aecb750f..e495aa2b 100644
--- a/examples/jamstack/main.cue
+++ b/examples/jamstack/main.cue
@@ -2,3 +2,21 @@ package main
 
 // Name of the application
 name: string & =~"[a-z0-9-]+"
+
+// FIXME: temporary workaround (GH issue #142) - image metadata is lost after build
+backend: container: command: ["/bin/hello-go"]
+
+// Inject db info in the container environment
+backend: environment: {
+	DB_USERNAME: database.username
+	DB_HOSTNAME: database.hostname
+	DB_PASSWORD: database.password
+	DB_DBNAME:   database.dbName
+	DB_PORT:     "\(database.port)"
+	DB_TYPE:     database.dbType
+}
+
+url: {
+	frontendURL: "FIXME"
+	backendURL:  "https://\(backend.hostname)/"
+}